Three-body antikaon-nucleon systems
Shevchenko, N V
2016-01-01
The paper contains a review of the exact or accurate results achieved in the field of the three-body antikaon-nucleon physics. Different states and processes in $\\bar{K}NN$ and $\\bar{K}\\bar{K}N$ systems are considered. In particular, quasi-bound states in $K^- pp$ and $K^- K^- p$ systems were investigated together with antikaonic deuterium atom. Near-threshold scattering of antikaons on deuteron, including $K^- d$ scattering length, and applications of the scattering amplitudes are also discussed. All exact three-body results were calculated using some form of Faddeev equations. Different versions of $\\bar{K}N$, $\\Sigma N$, $\\bar{K}\\bar{K}$, and $NN$ potentials, specially constructed for the calculations, allowed investigation of the dependence of the three-body results on two-body input. Special attention is paid to the antikaon-nucleon interaction, being the most important for the three-body systems. Additionally performed approximate calculations demonstrate accuracy of the commonly used approaches.
Diffusion Monte Carlo calculations of three-body systems
Institute of Scientific and Technical Information of China (English)
L(U) Meng-Jiao; REN Zhong-Zhou; LIN Qi-Hu
2012-01-01
The application of the diffusion Monte Carlo algorithm in three-body systems is studied.We develop a program and use it to calculate the property of various three-body systems.Regular Coulomb systems such as atoms,molecules,and ions are investigated.The calculation is then extended to exotic systems where electrons are replaced by muons.Some nuclei with neutron halos are also calculated as three-body systems consisting of a core and two external nucleons.Our results agree well with experiments and others' work.
Three Body Resonance Overlap in Closely Spaced Multiple Planet Systems
Quillen, Alice C
2011-01-01
We compute the strengths of zero-th order (in eccentricity) three-body resonances for a co-planar and low eccentricity multiple planet system. In a numerical integration we illustrate that slowly moving Laplace angles are matched by variations in semi-major axes among three bodies with the outer two bodies moving in the same direction and the inner one moving in the opposite direction, as would be expected from the two quantities that are conserved in the three-body resonance. A resonance overlap criterion is derived for the closely and equally spaced, equal mass system with three-body resonances overlapping when interplanetary separation is greater than an order unity factor times the planet mass to the one quarter power. We find that three-body resonances are sufficiently dense to account for wander in semi-major axis seen in numerical integrations of closely spaced systems and they are likely the cause of instability of these systems. For interplanetary separations outside the overlap region, stability tim...
Three-body systems in pionless effective field theory
Vanasse, Jared
2016-04-01
Investigations of three-body nuclear systems using pionless effective field theory (EFTπ̸) are reviewed. The history of EFTπ̸ in nd and pd scattering is briefly discussed and emphasis put on the use of strict perturbative techniques. In addition renormalization issues appearing in pd scattering are also presented. Bound state calculations are addressed and new perturbative techniques for describing them are highlighted. Three-body breakup observables in nd scattering are also considered and the utility of EFTπ̸ for addressing them.
Analytical solution of relativistic three-body bound systems
Energy Technology Data Exchange (ETDEWEB)
Aslanzadeh, M.; Rajabi, A.A. [Shahrood University of Technology, Physics Department, Shahrood (Iran, Islamic Republic of)
2014-10-15
In this paper we have investigated in detail the relativistic three-body bound states. We carried out calculations in six-dimensional representation on the basis of the Jacobi coordinates. The obtained second-degree differential equation is solved by using the Nikiforov-Uvarov method and the energy eigenvalues are obtained. Consequently we obtained the binding energy of the three-nucleon bound system. Here we used the generalized Woods-Saxon spin-independent potential in our calculations. The dependence of the three-body binding energy on the potential parameters is also investigated. (orig.)
Mass-imbalanced Three-Body Systems in Two Dimensions
DEFF Research Database (Denmark)
F. Bellotti, F.; Frederico, T.; T. Yamashita, M.;
2013-01-01
demonstrate that mass-imbalanced systems that are accessible in the field of ultracold atomic gases can have a rich three-body bound state spectrum in two dimensional geometries. Small light-heavy mass ratios increase the number of bound states. For 87Rb-87Rb-6Li and 133Cs-133Cs-6Li we find respectively 3 and...
Effective three-body interaction in compound systems
International Nuclear Information System (INIS)
In the framework of a resonating group formalism the author derives effective N-body equations. For a three-cluster system he obtains terms which correspond to an effective three-body force. The effective potentials are calculated for the case 4He + n + p. In addition the author presents a separable approximation of the effective interaction. (HSI)
Mapping the three-body system - decay time and reversibility
Lehto, H. J.; Kotiranta, S.; Valtonen, M. J.; Heinämäki, P.; Mikkola, S.; Chernin, A. D.
2008-08-01
In this paper we carry out a quantitative analysis of the three-body systems and map them as a function of decaying time and initial configuration, look at this problem as an example of a simple deterministic system and ask to what extent the orbits are really predictable. We have investigated the behaviour of about 200000 general Newtonian three-body systems using the simplest initial conditions. Within our resolution these cover all the possible states where the objects are initially at rest and have no angular momentum. We have determined the decay time-scales of the triple systems and show that the distribution of this parameter is fractal in appearance. Some areas that appear stable on large scales exhibit very narrow strips of instability and the overall pattern, dominated by resonances, reminds us of a traditional Maasai warrior shield. Also an attempt is made to recover the original starting configuration of the three bodies by backward integration. We find there are instances where the evolution to the future and to the past lead to different orbits, in spite of time symmetric initial conditions. This implies that even in simple deterministic systems there exists an arrow of time.
Mapping the three-body system - decay time and reversibility
Lehto, H J; Valtonen, M J; Heinamaki, P; Mikkola, S; Chernin, A D
2008-01-01
In this paper we carry out a quantitative analysis of the three-body systems and map them as a function of decaying time and intial conguration, look at this problem as an example of a simple deterministic system, and ask to what extent the orbits are really predictable. We have investigated the behavior of about 200 000 general Newtonian three body systems using the simplest initial conditions. Within our resolution these cover all the possible states where the objects are initially at rest and have no angular momentum. We have determined the decay time-scales of the triple systems and show that the distribution of this parameter is fractal in appearance. Some areas that appear stable on large scales exhibit very narrow strips of instability and the overall pattern, dominated by resonances, reminds us of a traditional Maasai warrior shield. Also an attempt is made to recover the original starting conguration of the three bodies by backward integration. We find there are instances where the evolution to the f...
Series of broad resonances in atomic three-body systems
Diaz, D; Hu, C -Y
2016-01-01
We re-examine the series of resonances found earlier in atomic three-body systems by solving the Faddeev-Merkuriev integral equations. These resonances are rather broad and line-up at each threshold with gradually increasing gaps, the same way for all thresholds and irrespective of the spatial symmetry. We relate these resonances to the Gailitis mechanism, which is a consequence of the polarization potential.
Yarmukhamedov, R
2016-01-01
Asymptotic expressions for the radial and full wave functions of a three{body bound halo nuclear system with two charged particles in relative coordinates are obtained in explicit form, when the relative distance between two particles tends to infinity. The obtained asymptotic forms are applied to the analysis of the asymptotic behavior of the three-body (pn?) wave functions for the halo ($E^*=3.562$ MeV, $J^{\\pi}=0^+$, $T=1$) state of $^6$Li derived by D. Baye within the Lagrange-mesh method for two forms of the $\\alpha N$ -potential. The agreement between the calculated wave function and the asymptotic formula is excellent for distances up to 30 fm. Information about the values of the three-body asymptotic normalization functions is extracted. It is shown that the extracted values of the three-body asymptotic normalization function are sensitive to the form of the $\\alpha N$ -potential. The mirror symmetry is revealed for the three-body asymptotic normalization functions derived for the isobaric ($^6$He, $^...
Gravitational waves from periodic three-body systems.
Dmitrašinović, V; Suvakov, Milovan; Hudomal, Ana
2014-09-01
Three bodies moving in a periodic orbit under the influence of Newtonian gravity ought to emit gravitational waves. We have calculated the gravitational radiation quadrupolar waveforms and the corresponding luminosities for the 13+11 recently discovered three-body periodic orbits in Newtonian gravity. These waves clearly allow one to distinguish between their sources: all 13+11 orbits have different waveforms and their luminosities (evaluated at the same orbit energy and body mass) vary by up to 13 orders of magnitude in the mean, and up to 20 orders of magnitude for the peak values. PMID:25238346
Meson exchange current and three-body force contributions to the 4He charge form factor
International Nuclear Information System (INIS)
Effects of meson exchange current (MEC) on the charge form factor (CFF) and charge density of 4He are investigated, including pair, mesonic and retardation current terms. The influence of three-body force (3BF) is considered by adopting the realistic wave function obtained from the nuclear Hamiltonian which explicitly includes the two-pion exchange 3BF. As a result the 3BF is found to greatly enhance the MEC contribution. When the 3BF is taken into account, the MEC contribution is shown to remove most of the discrepancy between the theoretical and experimental CFF's at the second maximum. Resulting effects on the charge density are found to yield a depression in the central region. (author)
A simple parameter-free wavefunction for the ground state of three-body systems
International Nuclear Information System (INIS)
Full text: The study of the structure and stability of Coulombic three-body systems [m1m2m3], with arbitrary masses mi and charges zi (i = 1, 2, 3), has been the subject of many investigations. Recently, we have proposed a pedagogical, simple and parameter-free wavefunction for the ground state of two-electron atoms. The proposal was then generalized to more general atomic three-body systems in which one of the particles is positively charged (z3 > 0) and heavier than the other two which are negatively charged (z1 2 ij = μijzizj where μij mimj/(mi + mj) (i ≠ j = 1, 2, 3) are the reduced masses. In terms of the interparticles coordinates r1 = r13, r2 = r23 and r12 (particle 3 is placed at the origin of the coordinates), the proposed wavefunction reads ψARGGEN = NARGGEN eν13r2(1 + ν12r12)[1 + c(r12 + r22], where NARGGEN is the normalization constant and c is replaced by an analytical expression in terms of (mi, zi) in order to minimize the mean energy of the ground state. The wavefunction ψARGGEN : has the same form for all systems; is parameter-free; is nodeless; satisfies, by construction, all two-particle cusp conditions; and yields reasonable ground state energies for several systems including the prediction of a bound state for H-, D-, T- and Mu-. A wavefunction with all these characteristics is presently not available in the literature. The simplicity of ψARGGEN is such that analytical expressions for the ground state energy can be derived. Hence, we have a useful predictive and simple analytical tool (which, to our knowledge, is not available in the literature) to estimate the energy, and therefore to study the stability, of exotic Coulombic three-body systems. In addition, our proposal is simple enough, but sufficiently accurate to be used as a starting point in calculations of collision cross sections. Of course due to its simplicity, energy values cannot compete with those obtained with advanced variational wavefunctions which involve large number
Three body resonances in two meson-one baryon systems
Martínez Torres, Alberto; Khemchandani, K. P.; Oset Báguena, Eulogio
2007-01-01
We report four $\\Sigma$'s and three $\\Lambda$'s, in the 1500 - 1800 MeV region, as two meson - one baryon S-wave $(1/2)^+$ resonances. We solve Faddeev equations in the coupled channel approach. The invariant mass of one of the meson-baryon pairs and that of the three particles have been varied and peaks in the squared three body $T$-matrix have been found very close to the existing $S$ = -1, $J^P= 1/2^+$ low lying baryon resonances. The input two-body $t$-matrices for meson-meson and meson-b...
Ground and excited states for exotic three-body atomic systems
Directory of Open Access Journals (Sweden)
Gasaneo G.
2010-04-01
Full Text Available An Angular Correlated Conﬁguration Interaction method is extended and applied to exotic threebody atomic systems with general masses. A recently proposed angularly correlated basis set is used to construct, simultaneously and with a single diagonalization, ground and excited states wave functions which: (i satisfy exactly Kato cusp conditions at the two-body coalescence points; (ii have only linear parameters; (iii show a fast convergency rate for the energy; (iv form an orthogonal set. The eﬃciency of the construction is illustrated by the study a variety of three-body atomic systems [m1− m2− m3z3+ ] with two negatively charged light particles, with 123 diverse masses m1− and m2−, and a heavy positively charged nucleus m3z3+. The calculated ground 11S and several excited n1,3S state energies are compared with those given in the literature, when available. We also present a short discussion on the critical charge necessary to get a stable three-body system supporting two electrons, an electron and a muon, or two muons.
Zero Energy Ground State in the Three-Body System
Gridnev, Dmitry K.
2009-01-01
We consider a 3--body system in $\\mathbb{R}^3$ with non--positive potentials and non--negative essential spectrum. Under certain requirements on the fall off of pair potentials it is proved that if at least one pair of particles has a zero energy resonance then a square integrable zero energy ground state of three particles does not exist. This complements the analysis in \\cite{1}, where it was demonstrated that square integrable zero energy ground states are possible given that in all two--b...
Universal low-energy behavior in three-body systems
International Nuclear Information System (INIS)
We consider a pairwise interacting quantum 3-body system in 3-dimensional space with finite masses and the interaction term V12 + λ(V13 + V23), where all pair potentials are assumed to be nonpositive. The pair interaction of the particles (1, 2) is tuned to make them have a zero energy resonance and no negative energy bound states. The coupling constant λ > 0 is allowed to take the values for which the particle pairs (1, 3) and (2, 3) have no bound states with negative energy. Let λcr denote the critical value of the coupling constant such that E(λ) → −0 for λ → λcr, where E(λ) is the ground state energy of the 3-body system. We prove the theorem, which states that near λcr, one has E(λ) = C(λ − λcr)[ln(λ − λcr)]−1 + h.t., where C is a constant and h.t. stands for “higher terms.” This behavior of the ground state energy is universal (up to the value of the constant C), meaning that it is independent of the form of pair interactions
Zero Energy Ground State in the Three--Body System
Gridnev, Dmitry K
2009-01-01
We consider a 3--body system in $\\mathbb{R}^3$ with non--positive potentials and non--negative essential spectrum. Under certain requirements on the fall off of pair potentials it is proved that if one pair has a zero energy resonance then a square integrable zero energy ground state of three particles does not exist. This complements the analysis in \\cite{1}, where it was demonstrated that zero energy ground states is possible in the absence of zero energy resonances in particle pairs. As a corollary it is proved that one can tune the coupling constants of pair potentials so that for any given $R, \\epsilon >0$: (a) the bottom of essential spectrum is at zero; (b) there is a negative energy ground state $\\psi(\\xi)$, where $\\int |\\psi(\\xi)|^2 = 1$; (c) $\\int_{|\\xi| \\leq R} |\\psi(\\xi)|^2 < \\epsilon$.
Exactly solvable models for multidimensional and three-body quantum systems
International Nuclear Information System (INIS)
In the adiabatic representation, multidimensional and three-body inverse scattering problems are discussed on the basis of a consistent formulation of both the multichannel inverse problem for gauge systems of equations describing slow dynamics of the system and parametric one for fast dynamics. The method of constructing a wide class of exactly solvable models is investigated by generalizing the Bergmann potentials to the parametric family of inverse problems and systems of equations with covariant derivatives. A constructive approach to the three-body inverse scattering problem is based on the global adiabatic representation for three-body wave functions obtained in terms of the local adiabatic expansions of the Faddeev components
The self-consistent field model for Fermi systems with account of three-body interactions
Directory of Open Access Journals (Sweden)
Yu.M. Poluektov
2015-12-01
Full Text Available On the basis of a microscopic model of self-consistent field, the thermodynamics of the many-particle Fermi system at finite temperatures with account of three-body interactions is built and the quasiparticle equations of motion are obtained. It is shown that the delta-like three-body interaction gives no contribution into the self-consistent field, and the description of three-body forces requires their nonlocality to be taken into account. The spatially uniform system is considered in detail, and on the basis of the developed microscopic approach general formulas are derived for the fermion's effective mass and the system's equation of state with account of contribution from three-body forces. The effective mass and pressure are numerically calculated for the potential of "semi-transparent sphere" type at zero temperature. Expansions of the effective mass and pressure in powers of density are obtained. It is shown that, with account of only pair forces, the interaction of repulsive character reduces the quasiparticle effective mass relative to the mass of a free particle, and the attractive interaction raises the effective mass. The question of thermodynamic stability of the Fermi system is considered and the three-body repulsive interaction is shown to extend the region of stability of the system with the interparticle pair attraction. The quasiparticle energy spectrum is calculated with account of three-body forces.
Atlas of three body mean motion resonances in the Solar System
Gallardo, Tabaré
2013-01-01
We present a numerical method to estimate the strengths of arbitrary three body mean motion resonances between two planets in circular coplanar orbits and a massless particle in an arbitrary orbit. This method allows us to obtain an atlas of the three body resonances in the Solar System showing where are located and how strong are thousands of resonances involving all the planets from 0 to 1000 au. This atlas confirms the dynamical relevance of the three body resonances involving Jupiter and Saturn in the asteroid belt but also shows the existence of a family of relatively strong three body resonances involving Uranus and Neptune in the far Trans-Neptunian region and relatively strong resonances involving terrestrial and jovian planets in the inner planetary system. We calculate the density of relevant resonances along the Solar System resulting that the main asteroid belt is located in a region of the planetary system with the lowest density of three body resonances. The method also allows the location of th...
Stability of the three-body Coulomb systems with J=1 in the oscillator representation
International Nuclear Information System (INIS)
The oscillator representation is applied to calculate the energy spectrum of three-body Coulomb systems with J total angular momentum. For the three-body Coulomb systems with J=1 and arbitrary masses the region of stability is determined. For the systems (A+A-e-), (pe-C+), (pB-e-) and (D+e-e+), the values for the critical masses of A-, B-, C- and D-particles are obtained: mA=2.22me, mB=1.49me, mC=2.11me and mD=4.15me. 18 refs., 1 fig., 3 tabs
On the inherent self-excited macroscopic randomness of chaotic three-body system
Liao, Shijun; Li, Xiaoming
2014-01-01
What is the origin of macroscopic randomness (uncertainty)? This is one of the most fundamental open questions for human being. In this paper, 10000 samples of reliable (convergent), multiple-scale (from 1.0E-60 to 100) numerical simulations of a chaotic three-body system indicate that, without any external disturbance, the microscopic inherent uncertainty (in the level of 1.0E-60) due to physical fluctuation of initial positions of the three-body system enlarges exponentially into macroscopi...
On the motion of a three-body system on hypersurface of proper energy
International Nuclear Information System (INIS)
Based on the fact that for a Hamiltonian system there exists equivalence between phase trajectories and geodesic trajectories on the Riemannian manifold M (the Lagrangian surface of the body system), the classical three-body problem is formulated in the framework of six ordinary differential equations (ODEs) of the second order on the energy surface of the body system. It is shown that in the case when the total interaction potential of the body system depends on the relative distances between particles, the three of six geodesic equations describing rotations of formed by three bodies triangle are solved exactly. Using this fact, it is shown that the three-body problem can be described in the limits of three nonlinear ODEs of canonical form, which in phase space is equivalent to the autonomous sixth-order system. The equations of geodesic deviations on the manifold R3 (the space of relative distances between particles) are derived in an explicit form. A system of algebraic equations for finding the homographic solutions of a restricted three-body problem is obtained. The initial and asymptotic conditions for solution of the classical scattering problem are found
Configuration maintaining control of three-body ring tethered system based on thrust compensation
Huang, Panfeng; Liu, Binbin; Zhang, Fan
2016-06-01
Space multi-tethered systems have shown broad prospects in remote observation missions. This paper mainly focuses on the dynamics and configuration maintaining control of space spinning three-body ring tethered system for such mission. Firstly, we establish the spinning dynamic model of the three-body ring tethered system considering the elasticity of the tether using Newton-Euler method, and then validate the suitability of this model by numerical simulation. Subsequently, LP (Likins-Pringle) initial equilibrium conditions for the tethered system are derived based on rigid body's equilibrium theory. Simulation results show that tether slack, snapping and interaction between the tethers exist in the three-body ring system, and its' configuration can not be maintained without control. Finally, a control strategy based on thrust compensation, namely thrust to simulate tether compression under LP initial equilibrium conditions is designed to solve the configuration maintaining control problem. Control effects are verified by numerical simulation compared with uncontrolled situation. Simulation results show that the configuration of the three-body ring tethered system could maintain under this active control strategy.
Stripping reactions in a three-body system. Comparison of DWBA and exact solutions
International Nuclear Information System (INIS)
Stripping reactions 'a estados no continuo' are studied in a three particle system. Since the three-body problem has an exact treatment, comparison will be made between the exact solution and the DWBA model solution. This problem is more complex in the continuous case, as shown in the convergence problem of the standard DWBA amplitude radial integral
$D^*$ $\\Xi N$ bound state in strange three-body systems
Garcilazo, H
2016-01-01
The recent update of the strangeness $-2$ ESC08c Nijmegen potential incorporating the NAGARA and KISO events predicts a $\\Xi N$ bound state, $D^*$, in the $^3S_1 (I=1)$ channel. We study if the existence of this two-body bound state could give rise to stable three-body systems. For this purpose we solve the bound state problem of three-body systems where the $\\Xi N$ state is merged with $N$'s, $\\Lambda$'s, $\\Sigma's$ or $\\Xi$'s, making use of the most recent updates of the two-body ESC08c Nijmegen potentials. We found that there appear stable states in the $\\Xi NN$ and $\\Xi \\Xi N$ systems, the $\\Xi \\Lambda N$ and $\\Xi \\Sigma N$ systems being unbound.
On the Inherent Self-Excited Macroscopic Randomness of Chaotic Three-Body Systems
Liao, Shijun; Li, Xiaoming
What is the origin of macroscopic randomness (uncertainty)? This is one of the most fundamental open questions for human beings. In this paper, 10 000 samples of reliable (convergent), multiple-scale (from 10-60 to 102) numerical simulations of a chaotic three-body system indicate that, without any external disturbance, the microscopic inherent uncertainty (in the level of 10-60) due to physical fluctuation of initial positions of the three-body system enlarges exponentially into macroscopic randomness (at the level O(1)) until t = T*, the so-called physical limit time of prediction, but propagates algebraically thereafter when accurate prediction of orbit is impossible. Note that these 10 000 samples use micro-level, inherent physical fluctuations of initial position, which have nothing to do with human beings. Especially, the differences of these 10 000 fluctuations are mathematically so small (in the level of 10-60) that they are physically the same since a distance shorter than a Planck length does not make physical sense according to the string theory. This indicates that the macroscopic randomness of the chaotic three-body system is self-excited, say, without any external force or disturbances, from the inherent micro-level uncertainty. It provides us the new concept "self-excited macroscopic randomness (uncertainty)". The macroscopic randomness is found to be dependent upon microscopic uncertainty, from the statistical viewpoint. In addition, it is found that, without any external disturbance, the chaotic three-body system might randomly disrupt with symmetry-breaking at t = 1000 in about 25% probability, which provides us new concepts "self-excited random disruption", "self-excited random escape" and "self-excited symmetry breaking" of the chaotic three-body system. Hence, it suggests that a chaotic three-body system might randomly evolve by itself, without any external forces or disturbance. Thus, the world is essentially uncertain, since such kind of self
High Precision Three-body Variational Method for Critical Nuclear Charge
Busuttil, Michael A.
For an atom there exists a critical nuclear charge Zc that is just sufficient to bind the nucleus and its electrons into a stable configuration. A study of the critical charge for two-electron atoms is presented with the purpose of improving accuracy for Zc. To this end, high precision techniques involving the variational method with multiple basis sets in Hylleraas coordinates are employed. The method is particularly well adapted to the case where one electron is strongly bound and the other is at the limit of becoming unbound. The results are analysed in terms of fractional powers of (Z -- Zc) related to the analytic structure of the energy E( Z) and a 1/Z expansion for the energy. This results in a Zc of 0.91102808(5). Future work prompted by this study includes development of direct techniques to determine Zc utilizing the low-Z stability of the method; developing the framework and mathematical justification for a novel bootstrap analysis method used in curve-fitting; and investigating the inclusion of finite nuclear mass, relativistic effects, and other higher order corrections in the determination of Zc.
International Nuclear Information System (INIS)
Three-body forces are defined and their properties discussed. Evidence for such forces in the trinucleon bound states and scattering reactions is reviewed. The binding energy defects of the trinucleon bound states, the 3He charge density, the Phillips line for doublet n-d scattering lengths, and three-nucleon breakup reactions are discussed, together with the possible influence of three-body forces on these observables
Local stress and heat flux in atomistic systems involving three-body forces.
Chen, Youping
2006-02-01
Local densities of fundamental physical quantities, including stress and heat flux fields, are formulated for atomistic systems involving three-body forces. The obtained formulas are calculable within an atomistic simulation, in consistent with the conservation equations of thermodynamics of continuum, and can be applied to systems with general two- and three-body interaction forces. It is hoped that this work may correct some misuse of inappropriate formulas of stress and heat flux in the literature, may clarify the definition of site energy of many-body potentials, and may serve as an analytical link between an atomistic model and a continuum theory. Physical meanings of the obtained formulas, their relation with virial theorem and heat theorem, and the applicability are discussed. PMID:16468857
Three-Body Abrasion Testing Using Lunar Dust Simulants to Evaluate Surface System Materials
Kobrick, Ryan L.; Budinski, Kenneth G.; Street, Kenneth W., Jr.; Klaus, David M.
2010-01-01
Numerous unexpected operational issues relating to the abrasive nature of lunar dust, such as scratched visors and spacesuit pressure seal leaks, were encountered during the Apollo missions. To avoid reoccurrence of these unexpected detrimental equipment problems on future missions to the Moon, a series of two- and three-body abrasion tests were developed and conducted in order to begin rigorously characterizing the effect of lunar dust abrasiveness on candidate surface system materials. Two-body scratch tests were initially performed to examine fundamental interactions of a single particle on a flat surface. These simple and robust tests were used to establish standardized measurement techniques for quantifying controlled volumetric wear. Subsequent efforts described in the paper involved three-body abrasion testing designed to be more representative of actual lunar interactions. For these tests, a new tribotester was developed to expose samples to a variety of industrial abrasives and lunar simulants. The work discussed in this paper describes the three-body hardware setup consisting of a rotating rubber wheel that applies a load on a specimen as a loose abrasive is fed into the system. The test methodology is based on ASTM International (ASTM) B611, except it does not mix water with the abrasive. All tests were run under identical conditions. Abraded material specimens included poly(methyl methacrylate) (PMMA), hardened 1045 steel, 6061-T6 aluminum (Al) and 1018 steel. Abrasives included lunar mare simulant JSC- 1A-F (nominal size distribution), sieved JSC-1A-F (materials of aluminum and PMMA. The nominal JSC- 1A-F consistently showed more abrasion wear than the sieved version of the simulant. The lunar dust displayed abrasivity to all of the test materials, which are likely to be used in lunar landing equipment. Based on this test experience and pilot results obtained, recommendations are made for systematic abrasion testing of candidate materials intended for
Equilibrium configurations of the tethered three-body formation system and their nonlinear dynamics
Institute of Scientific and Technical Information of China (English)
Ming Xu; Jian-Min Zhu; Tian Tan; Shi-Jie Xu
2012-01-01
This paper considers nonlinear dynamics of tethered three-body formation system with their centre of mass staying on a circular orbit around the Earth,and applies the theory of space manifold dynamics to deal with the nonlinear dynamical behaviors of the equilibrium configurations of the system.Compared with the classical circular restricted three body system,sixteen equilibrium configurations are obtained globally from the geometry of pseudo-potential energy surface,four of which were omitted in the previous research.The periodic Lyapunov orbits and their invariant manifolds near the hyperbolic equilibria are presented,and an iteration procedure for identifying Lyapunov orbit is proposed based on the differential correction algorithm.The non-transversal intersections between invariant manifolds are addressed to generate homoclinic and heteroclinic trajectories between the Lyapunov orbits.(3,3)-and (2,1)-heteroclinic trajectories from the neighborhood of one collinear equilibrium to that of another one,and (3,6)-and (2,1)-homoclinic trajectories from and to the neighborhood of the same equilibrium,are obtained based on the Poincaré mapping technique.
Mardling, Rosemary A
2013-01-01
Modern applications of celestial mechanics include the study of closely packed systems of exoplanets, circumbinary planetary systems, binary-binary interactions in star clusters, and the dynamics of stars near the galactic centre. While developments have historically been guided by the architecture of the Solar System, the need for more general formulations with as few restrictions on the parameters as possible is obvious. Here we present clear and concise generalisations of two classic expansions of the three-body disturbing function, simplifying considerably their original form and making them accessible to the non-specialist. Governing the interaction between the inner and outer orbits of a hierarchical triple, the disturbing function in its general form is the conduit for energy and angular momentum exchange and as such, governs the secular and resonant evolution of the system and its stability characteristics. Focusing here on coplanar systems, the first expansion is one in the ratio of inner to outer se...
Comment on the three-body theory for period changes in RS CVn systems
Van Buren, D.
1986-01-01
In the three-body theory for period variations in RS CVn systems, the timing residuals are interpreted as light-travel time differences as the eclipsing system moves about the barycenter of the triple. These residuals can require a larger orbit than Kepler's law allows, given the time scale of the period variations. For only two of eight systems investigated, SV Cam and V471 Tau, is the theory plausible in that the inferred barycentric motion of the binary is smaller than the orbit of the third body, and the inferred properties of the third body are both reasonable and consistent with its remaining hidden. The theory is thus not a general theory for period changes. Observational testing of the theory is straightforward and may lead to the detection of 'brown dwarfs' associated with eclipsing systems through their kinematic effects.
Faddeev-type calculation of (d,n) transfer reactions in three-body nuclear systems
Deltuva, A
2015-01-01
Exact Faddeev-type three-body equations are applied to the study of the proton transfer reactions $(d,n)$ in the system consisting of a nuclear core and two nucleons. The integral equations for the three-body transition operators are solved in the momentum-space framework including the Coulomb interaction via the screening and renormalization method. For a weakly bound final nucleus the calculation of the $(d,n)$ reaction is more demanding in terms of the screening radius as compared to the $(d,p)$ reaction. Well converged differential cross section results are obtained for $^{7}{Be}(d,n)^{8}{B}$, $^{12}{C}(d,n)^{13}{N}$, and $^{16}{O}(d,n)^{17}{F}$ reactions. A comparison with the corresponding $(d,p)$ reactions is made. The calculations fail to reproduce the shape of the angular distribution for reactions on $^{12}{C}$ but provide quite successful description for reactions on $^{16}{O}$, especially for the transfer to the $^{17}{F}$ excited state $1/2^+$ when using a nonlocal optical potential.
Theoretical Studies of Direct and Resonant Reactive Scattering Involving Three-Body Systems.
Lutrus, Chen Kwee
The validity of DWBA method is checked to study the direct process for atom-diatomic molecule collisions. The DWBA results for the relative product rotational state distribution for H + D_2 to HD + D are demonstrated to be in good agreement with experimental observations and quasi-classical calculations. Direct comparison between the DWBA and exact close-coupling calculations for the reactive scattering angular distributions of H + H_2 to H_2 + H shows that the structures of angular distribution between the two methods are similar, and the effect of coupling strongly affects the absolute magnitude of cross sections but not the structure of normalized angular distributions. Information theoretic analysis of rotational surprisal is presented for the reactive collision process of H + D_2 to HD + D. Propensity of near linear surprisal at low collision energies and of deviation from linearity at higher collision energies is found. The theoretical formalism of resonance involving three-body systems is presented. Mathematically the three-body quasi-bound state is represented as a linear combination two-body quasi-bound states in terms of each arrangement. Its reduction to the effective two-body representation of the transition amplitude leads to Feshbach's theory of resonance, thus validating our three-body resonant scattering theory. A rigorous derivation of the T matrix is presented to study the effects of direct and resonant reactive scattering processes of e + AB to A + B^-. Analysis of dissociative attachment processes e + H_2 to H + H^- and e + HCl to H + Cl^- is presented, with emphasis on the roles of the direct and resonant processes in the total cross sections. Furthermore, Argand diagram analysis of the transition amplitude for the two dissociative attachment processes is performed. It is found that strong resonance is present in e + HClto H + Cl^-, but not in e + H_2 to H + H^ -. A new recursion relation for the evaluation of overlap between the Morse
Three body resonances in close orbiting planetary systems: Tidal dissipation and orbital evolution
Papaloizou, John C B
2014-01-01
We study the orbital evolution of a three planet system with masses in the super-Earth regime resulting from the action of tides on the planets induced by the central star which cause orbital circularization. We consider systems either in or near to a three body commensurability for which adjacent pairs of planets are in a first order commensurability. We develop a simple analytic solution, derived from a time averaged set of equations, that describes the expansion of the system away from strict commensurability as a function of time, once a state where relevant resonant angles undergo small amplitude librations has been attained. We perform numerical simulations that show the attainment of such resonant states focusing on the Kepler 60 system. The results of the simulations confirm many of the scalings predicted by the appropriate analytic solution. We go on to indicate how the results can be applied to put constraints on the amount of tidal dissipation that has occurred in the system. For example, if the sy...
Stability of the Moons Orbits in Solar System in the Restricted Three-Body Problem
Directory of Open Access Journals (Sweden)
Sergey V. Ershkov
2015-01-01
Full Text Available We consider the equations of motion of three-body problem in a Lagrange form (which means a consideration of relative motions of 3 bodies in regard to each other. Analyzing such a system of equations, we consider in detail the case of moon’s motion of negligible mass m3 around the 2nd of two giant-bodies m1, m2 (which are rotating around their common centre of masses on Kepler’s trajectories, the mass of which is assumed to be less than the mass of central body. Under assumptions of R3BP, we obtain the equations of motion which describe the relative mutual motion of the centre of mass of 2nd giant-body m2 (planet and the centre of mass of 3rd body (moon with additional effective mass ξ·m2 placed in that centre of mass ξ·m2+m3, where ξ is the dimensionless dynamical parameter. They should be rotating around their common centre of masses on Kepler’s elliptic orbits. For negligible effective mass ξ·m2+m3 it gives the equations of motion which should describe a quasi-elliptic orbit of 3rd body (moon around the 2nd body m2 (planet for most of the moons of the planets in Solar System.
Stability of the Moons orbits in Solar system in the restricted three-body problem
Ershkov, Sergey V
2015-01-01
We consider the equations of motion of three-body problem in a Lagrange form (which means a consideration of relative motions of 3-bodies in regard to each other). Analyzing such a system of equations, we consider in details the case of moon motion of negligible mass m3 around the 2-nd of two giant-bodies m1, m2 (which are rotating around their common centre of masses on Kepler trajectories), the mass of which is assumed to be less than the mass of central body. Under assumptions of R3BP, we obtain the equations of motion which describe the relative mutual motion of the centre of mass of 2-nd giant-body m2 (Planet) and the centre of mass of 3-rd body (Moon) with additional effective mass placed in that centre of mass. They should be rotating around their common centre of masses on Kepler elliptic orbits. For negligible effective mass it gives the equations of motion which should describe a quasi-elliptic orbit of 3-rd body (Moon) around the 2-nd body m2 (Planet) for most of the moons of the Planets in Solar s...
Three-body interactions in the condensed phases of helium atom systems
International Nuclear Information System (INIS)
In this work we investigate how the description of several properties of helium atoms in the condensed phases are affected by the three-body terms of a very accurate inter-atomic potential. We introduce two phenomenological parameters in the three-body part of the inter-atomic potential in order to describe properly the equations of state of the solid and liquid phases. The calculations were performed using the multi-weight extension to the diffusion Monte Carlo method which allows accurate calculations of small energy differences in a significant way. The results show how the equations of state for both the liquid and solid phases and properties like the isothermal compressibility, the equilibrium, melting and freezing densities are affected by three-body interactions
Contact parameters in two dimensions for general three-body systems
DEFF Research Database (Denmark)
F. Bellotti, F.; Frederico, T.; T. Yamashita, M.;
2014-01-01
We study the two dimensional three-body problem in the general case of three distinguishable particles interacting through zero-range potentials. The Faddeev decomposition is used to write the momentum-space wave function. We show that the large-momentum asymptotic spectator function has the same...
Directory of Open Access Journals (Sweden)
M. Carla Aragoni
2007-01-01
Full Text Available The 3 centre-4 electrons (3c-4e and the donor/acceptor or charge-transfer models for the description of the chemical bond in linear three-body systems, such as I3– and related electron-rich (22 shell electrons systems, are comparatively discussed on the grounds of structural data from a search of the Cambridge Structural Database (CSD. Both models account for a total bond order of 1 in these systems, and while the former fits better symmetric systems, the latter describes better strongly asymmetric situations. The 3c-4e MO scheme shows that any linear system formed by three aligned closed-shell species (24 shell electrons overall has reason to exist provided that two electrons are removed from it to afford a 22 shell electrons three-body system: all combinations of three closed-shell halides and/or chalcogenides are considered here. A survey of the literature shows that most of these three-body systems exist. With some exceptions, their structural features vary continuously from the symmetric situation showing two equal bonds to very asymmetric situations in which one bond approaches to the value corresponding to a single bond and the second one to the sum of the van der Waals radii of the involved atoms. This indicates that the potential energy surface of these three-body systems is fairly flat, and that the chemical surrounding of the chalcogen/halogen atoms can play an important role in freezing different structural situations; this is well documented for the I3– anion. The existence of correlations between the two bond distances and more importantly the linearity observed for all these systems, independently on the degree of their asymmetry, support the state of hypervalency of the central atom.
Asano, Masanari; Khrennikov, Andrei; Ohya, Masanori; Tanaka, Yoshiharu; Yamato, Ichiro
2016-05-28
We compare the contextual probabilistic structures of the seminal two-slit experiment (quantum interference experiment), the system of three interacting bodies andEscherichia colilactose-glucose metabolism. We show that they have the same non-Kolmogorov probabilistic structure resulting from multi-contextuality. There are plenty of statistical data with non-Kolmogorov features; in particular, the probabilistic behaviour of neither quantum nor biological systems can be described classically. Biological systems (even cells and proteins) are macroscopic systems and one may try to present a more detailed model of interactions in such systems that lead to quantum-like probabilistic behaviour. The system of interactions between three bodies is one of the simplest metaphoric examples for such interactions. By proceeding further in this way (by playing withn-body systems) we shall be able to find metaphoric mechanical models for complex bio-interactions, e.g. signalling between cells, leading to non-Kolmogorov probabilistic data. PMID:27091163
Secular dynamics in hierarchical three-body systems with mass loss and mass transfer
Michaely, Erez
2014-01-01
Recent studies have shown that secular evolution of triple systems can play a major role in the evolution and interaction of their inner binaries. Very few studies explored the stellar evolution of triple systems, and in particular the mass loss phase of the evolving stellar components. Here we study the dynamical secular evolution of hierarchical triple systems undergoing mass loss. We use the secular evolution equations and include the effects of mass-loss and mass-transfer, as well as general relativistic effects. We present various evolutionary channels taking place in such evolving triples, and discuss both the effects of mass-loss and mass-transfer in the inner binary system, as well as the effects of mass-loss/transfer from an outer third companion. We discuss several distinct types/regimes of triple secular evolution, where the specific behavior of a triple system can sensitively depend on its hierarchy and the relative importance of classical and general relativistic effects. We show that the orbital...
Institute of Scientific and Technical Information of China (English)
无
2000-01-01
A scheme for dealing with the quantum three-body problem is presented to separate the rotational degrees of freedom completely from the internal ones. In this method, the three-body Schridinger equation is reduced to a system of coupled partial differential equations, depending only upon three internal variables. For arbitrary total orbital angular momentum l and the parity (-1)l+λ (λ=0 or 1), the number of the equations in this system is l+1-λ. By expanding the wavefunction with respect to a complete set of orthonormal basis functions, the system of equations is further reduced to a system of linear algebraic equations.
Institute of Scientific and Technical Information of China (English)
马中骐
2000-01-01
A scheme for dealing with the quantum three-body problem is presented to separate the rotational degrees of freedom completely from the internal ones. In this method, the three-body Schrodinger equation is reduced to a system of coupled partial differential equations, depending only upon three internal variables. For arbitrary total orbital angular momentum l and the parity ( - 1)1+ λ (λ = 0 or 1), the number of the equations in this system is l + 1 - λ . By expanding the wavef unction with respect to a complete set of orthonormal basis functions, the system of equations is further reduced to a system of linear algebraic equations.
International Nuclear Information System (INIS)
Interest in inert-gas afterglows has been refocused by the developing importance of high pressure gas lasers operating in the visible and ultraviolet wavelength regions. These devices emphasize use of selective energy transfer pumping of atomic or molecular additives to energy storing, atmospheric pressure inert gases excited by intense electron beam discharges, or by fast pulsed direct discharges. At atmospheric pressures, thermolecular reaction channels that would be completely undetectable at low pressure may become important. This dissertation concerns an examination of three-body effects that enhance the reaction rates for energy transfer and for ion-molecule reactions that occur in atmospheric pressures of inert gas diluent, even in the absence of any formation of product clusters. The archetype case of the reaction of the energy-storing species of helium with molecular nitrogen was studied in two different preionized discharge systems capable of operation to 6 atm of pressure. The thermolecular rate coefficient for the reaction He2+ + N2 + He was concluded to be 13.1 x 10-30 cm6/sec with no evidence of saturation up to pressures of 6 atm. Effective rates of reaction were observed to be increased by this channel to a value three times in excess of the Langevin rate that has been traditionally considered to be an upper limit on the overall rate of reaction
International Nuclear Information System (INIS)
Fully nonadiabatic variational computations of energies of the H2+, HD+, and D2+ ions are carried out, making detailed allowance for the motions of all particles. Computations are performed using the basis set of exponential-trigonometric functions dependent on all the interparticle distances. The method of determining the nonlinear adjustable parameters that are responsible for the vibration-modulated exponential decrease of the basis functions with increasing the interparticle distances is developed in detail. Also examined is how an accuracy of the variational energy computations rises with an increase in the number N of the basis functions. For the maximal basis-set size (N = 300), the calculated ground-state energies of the HD+ and D2+ ions deviate from their exact values by 2 x 10-10 and 1 x 10-10 a.u., respectively; whereas the energy of the 2+ ion coincides with 2 its exact value to ten significant digits. The results obtained with the exponential-trigonometric basis set are eight orders of magnitude more precise than the computations with an even larger-sized (N = 350) basis set of monotonically decreasing purely exponential functions of the interatomic distances. This indicates that the exponential-trigonometric basis functions have considerable promise for accurate fully nonadiabatic variational computations of various three-body Coulomb systems with arbitrary masses of their particles. 18 refs., 4 tabs
International Nuclear Information System (INIS)
The uniform method of numerical investigation of bound states and scattering processes 2→ 2 (including resonance states) in the Coulomb three-body (CTB) systems is developed. It is based on the adiabatic hyperspherical approach (AHSA) and includes the numerical realization and applications to the three-body mesic atomic systems. The results of calculations of bound states of these systems (including the local characteristics of the wave functions) and the scattering processes 2→ 2 (including the characteristics of the resonance states) are presented
International Nuclear Information System (INIS)
Translational spectroscopy and coincidence detection of the neutral photofragments have been used to observe the dissociation dynamics of highly excited neutrals produced by charge exchange between keV cation beams with Cs, and the results from two novel systems are presented. CH5 is formed slightly above the 3s Rydberg level and dissociates into two possible fragmentation channels, H loss and H2 loss. The kinetic energy release distributions of the two products are presented and the branching ratio between the two is found to be 11.4 ± 1.5 : 1 with the H loss being the dominant channel. Production of the highly symmetric azabenzene sym-triazine in its 3s Rydberg state has been shown to induce dissociation to 3 HCN(Σ+). Examination of momentum correlation in the dissociation products shows that this dissociation occurs by two distinct mechanisms. Evidence from Monte Carlo simulations suggest a sequential mechanism occurs creating products accompanied by a kinetic energy release of ∼1.5-5 eV. A symmetric concerted mechanism is also observed and is associated with products receiving a 2-4 eV kinetic energy release.
Effect of dominant three-body interaction in two-dimensional square lattice
International Nuclear Information System (INIS)
The effect of dominant three-body interaction to hard-core boson Hubbard model is studied on a two-dimensional square lattice. In terms of quantum Monte Carlo method, it is shown explicitly a ρ = 2/3 solid phase with coexistence of charge-density-wave and bond orders appears due to the presence of the dominant three-body interaction. For strong three-body interaction, the ρ = 2/3 solid phase appears between superfluid phases and shrinks as decreasing the strength of the three-body interaction, forming a lobe structure in the phase diagram. For weak three-body interactions, superfluid phase exists for the whole range of hard-core densities except the full filled case, where the system is a Mott insulator.
Effect of dominant three-body interaction in two-dimensional square lattice
Liang, Ying; Guo, Huaiming
2012-12-01
The effect of dominant three-body interaction to hard-core boson Hubbard model is studied on a two-dimensional square lattice. In terms of quantum Monte Carlo method, it is shown explicitly a ρ = 2/3 solid phase with coexistence of charge-density-wave and bond orders appears due to the presence of the dominant three-body interaction. For strong three-body interaction, the ρ = 2/3 solid phase appears between superfluid phases and shrinks as decreasing the strength of the three-body interaction, forming a lobe structure in the phase diagram. For weak three-body interactions, superfluid phase exists for the whole range of hard-core densities except the full filled case, where the system is a Mott insulator.
International Nuclear Information System (INIS)
The three-body problem, which describes three masses interacting through Newtonian gravity without any restrictions imposed on the initial positions and velocities of these masses, has attracted the attention of many scientists for more than 300 years. In this paper, we present a review of the three-body problem in the context of both historical and modern developments. We describe the general and restricted (circular and elliptic) three-body problems, different analytical and numerical methods of finding solutions, methods for performing stability analysis and searching for periodic orbits and resonances. We apply the results to some interesting problems of celestial mechanics. We also provide a brief presentation of the general and restricted relativistic three-body problems, and discuss their astronomical applications. (review article)
Musielak, Z E
2015-01-01
The three-body problem, which describes three masses interacting through Newtonian gravity without any restrictions imposed on the initial positions and velocities of these masses, has attracted the attention of many scientists for more than 300 years. In this paper, we present a review of the three-body problem in the context of both historical and modern developments. We describe the general and restricted (circular and elliptic) three-body problems, different analytical and numerical methods of finding solutions, methods for performing stability analysis, search for periodic orbits and resonances, and application of the results to some interesting astronomical and space dynamical settings. We also provide a brief presentation of the general and restricted relativistic three-body problems, and discuss their astronomical applications.
Del Dotto, Alessio; Salmè, Giovanni; Scopetta, Sergio
2016-01-01
Poincare' covariant definitions for the spin-dependent spectral function and for the momentum distributions within the light-front Hamiltonian dynamics are proposed for a three-fermion bound system, starting from the light-front wave function of the system. The adopted approach is based on the Bakamjian-Thomas construction of the Poincare' generators, that allows one to easily import the familiar and wide knowledge on the nuclear interaction into a light-front framework. The proposed formalism can find useful applications in refined nuclear calculations, like the ones needed for evaluating the EMC effect or the semi-inclusive deep inelastic cross sections with polarized nuclear targets, since remarkably the light-front unpolarized momentum distribution by definition fulfills both normalization and momentum sum rules. It is also shown a straightforward generalization of the definition of the light-front spectral function to an A-nucleon system.
Filikhin, Igor; Suslov, Vladimir; Vlahovic, Branislav
2014-03-01
We study structure of energy spectrum of light hyprnucleus Λ6Heusing cluster α + Λ + n model. In particular, the spin doublet (1-,2-) of Λ6Heis of interest for the testing the spin dependence of hyperon-nucleon potentials. Experimental value for 1- ground state energy of Λ6Hehas been reported to be -0.17 MeV below the threshold Λ5He+ n. Our study is based on the configuration-space Faddeev equations for a system of three non-identical particles. The analytical continuation method in a coupling constant is applied for calculation of resonance parameters. The results of calculations for low-lying spectra of the system α + Λ + n are presented. Within our model, the α-n potential is constructed to reproduce the results of R-matrix analysis for α-n scattering data. This potential simulates the Pauli exception for αn in the s-state with repulsive core. We use phenomenological α- Λ potential and for the Λ-n interaction the s-wave potential simulating model NSC97f. We calculated energies of the low-lying 1-, 2-, 2+, 0- states. Obtained results are discussed and compared with other calculations. This work is supported by NSF CREST (HRD-0833184) and NASA (NNX09AV07A).
Anderson, Oscar A.
1978-01-01
An improved charge exchange system for substantially reducing pumping requirements of excess gas in a controlled thermonuclear reactor high energy neutral beam injector. The charge exchange system utilizes a jet-type blanket which acts simultaneously as the charge exchange medium and as a shield for reflecting excess gas.
Half-classical three-body problem
International Nuclear Information System (INIS)
A three-body system consisting of two heavy and one light particles is considered. The relative motion of the heavy particles is treated classically, while the light particle motion is described quantum mechanically. The interaction of these two degrees of freedom is self-consistently taken into account by the Feynman path-integral method. (author)
The quantum three-body problem
International Nuclear Information System (INIS)
A complete set of orthonormal functions suitable for the variational calculation of the energy of a three-body system is proposed. The matrix elements of the hamiltonian are explicitly given for three spinless particles described by completely symmetric functions in configuration space. (Author)
Three-body resonance in meteoroid streams
Sekhar, A.; Asher, D. J.; Vaubaillon, J.
2016-05-01
Mean-motion resonances play an important role in the evolution of various meteoroid streams. Previous works have studied the effects of two-body resonances in different comets and streams. These already established two-body resonances were mainly induced either by Jovian or Saturnian effects but not both at the same time. Some of these resonances have led to spectacular meteor outbursts and storms in the past. In this work, we find a new resonance mechanism involving three bodies - i.e. meteoroid particle, Jupiter and Saturn, in the Perseid meteoroid stream. Long-term three-body resonances are not very common in real small bodies in our solar system although they can mathematically exist at many resonant sweet spots in an abstract sense in any dynamical system. This particular resonance combination in the Perseid stream is such that it is close to the ratio of 1:4:10 if the orbital periods of Perseid particle, Saturn and Jupiter are considered respectively. These resonant Perseid meteoroids stay resonant for typically about 2 kyr. Highly compact dust trails due to this unique resonance phenomenon are present in our simulations. Some past and future years are presented where three-body resonant meteoroids of different sizes (or subject to different radiation pressures) are computed to come near the Earth. This is the first theoretical example of an active and stable three-body resonance mechanism in the realm of meteoroid streams.
Three-body resonance in meteoroid streams
Sekhar, A.; Asher, D. J.; Vaubaillon, J.
2016-08-01
Mean-motion resonances play an important role in the evolution of various meteoroid streams. Previous works have studied the effects of two-body resonances in different comets and streams. These already established two-body resonances were mainly induced either by Jovian or Saturnian effects but not both at the same time. Some of these resonances have led to spectacular meteor outbursts and storms in the past. In this work, we find a new resonance mechanism involving three bodies - i.e. meteoroid particle, Jupiter and Saturn, in the Perseid meteoroid stream. Long-term three-body resonances are not very common in real small bodies in our Solar system although they can mathematically exist at many resonant sweet spots in an abstract sense in any dynamical system. This particular resonance combination in the Perseid stream is such that it is close to the ratio of 1:4:10 if the orbital periods of Perseid particle, Saturn and Jupiter are considered, respectively. These resonant Perseid meteoroids stay resonant for typically about 2 kyr. Highly compact dust trails due to this unique resonance phenomenon are present in our simulations. Some past and future years are presented where three-body resonant meteoroids of different sizes (or subject to different radiation pressures) are computed to come near the Earth. This is the first theoretical example of an active and stable three-body resonance mechanism in the realm of meteoroid streams.
Hyperspherical Three-Body Calculation for Exotic Atoms
International Nuclear Information System (INIS)
Ground state energies of atomic three-body systems like negatively charged hydrogen, normal helium, positively charged-lithium, beryllium, carbon, oxygen, neon and negatively charged exotic-muonium and positronium atoms have been calculated adopting hyperspherical harmonics expansion method. Calculation of matrix elements of two body interactions needed in the hyperspherical harmonics expansion method for a three body system is greatly simplified by expanding the bra-and ket-vector states in the hyperspherical harmonics (HH) basis states appropriate for the partition corresponding to the interacting pair. This involves the Raynal-Revai coefficients (RRC), which are the transformation coefficients between the HH bases corresponding to the two partitions. Use of RRC become particularly essential for the numerical solution of three-body Schroedinger equation where the two-body potentials are other than Coulomb or harmonic. However in the present work the technique is used for two electron atoms 1H-(p+e-e-), D-(d+e-e-), Mu-(μ+e-e-), 4He(4He2+e-e-), 6Li(6Li3+e-e-), 10Be( 10Be4+e-e-), 12C(12C6+e-e-), 16O(16O8+e-e-) etc. and the exotic positronium negative ion Ps-(e+e-e-) where the interactions are purely Coulomb. The relative convergence in ground state binding energy with increasing Kmax for 20Ne has been demonstrated as a representative case. The calculated energies at Kmax = 28 using RRC's have been compared with those obtained by a straight forward manner in some representative cases to demonstrate the appropriateness of the use of RRC. The extrapolated energies have also been compared with those found in the literature. The calculated binding energies agree within the computational error. (author)
Internal motions in three-body bosonic Thomson atoms
International Nuclear Information System (INIS)
A three-body bosonic Thomson atom, namely a system of three charged bosons in a harmonic trap, with a very large Wigner parameter, has been studied. The states with zero angular momentum and even parity denoted as 0n+ have been calculated and analysed; the basic modes of excitation of this system have been revealed. It was found that each lower 0n+ state (n is from 1 to 5) has its own means of internal motion. Although the size of the system is very sensitive to the strength of the trap, the other features are found to be insensitive to the strength if the system remains in the Wigner regime. The breathing mode was found to be the easiest to excite. (author)
Some Three-body force cancellations in Chiral Lagrangians
Arriola, E Ruiz
2016-01-01
The cancellation between off-shell two body forces and three body forces implies a tremendous simplification in the study of three body resonances in two meson-one baryon systems. While this can be done by means of Faddeev equations we provide an alternative and simpler derivation using just the chiral Lagrangian and the field re-parametrization invariance.
Three-body critical Casimir forces
Mattos, T. G.; Harnau, L.; Dietrich, S.
2015-04-01
Within mean-field theory we calculate universal scaling functions associated with critical Casimir forces for a system consisting of three parallel cylindrical colloids immersed in a near-critical binary liquid mixture. For several geometrical arrangements and boundary conditions at the surfaces of the colloids we study the force between two colloidal particles in the direction normal to their axes, analyzing the influence of the presence of a third particle on that force. Upon changing temperature or the relative positions of the particles we observe interesting features such as a change of sign of this force caused by the presence of the third particle. We determine the three-body component of the forces acting on one of the colloids by subtracting the pairwise forces from the total force. The three-body contribution to the total critical Casimir force turns out to be more pronounced for small surface-to-surface distances between the colloids as well as for temperatures close to criticality. Moreover, we compare our results with similar ones for other physical systems such as three atoms interacting via van der Waals forces.
Three-body resonance in meteoroid streams
Sekhar, Aswin; Vaubaillon, Jeremie
2016-01-01
Mean-motion resonances play an important role in the evolution of various meteoroid streams. Previous works have studied the effects of two-body resonances in different comets and streams. These already established two-body resonances were mainly induced either by Jovian or Saturnian effects but not both at the same time. Some of these resonances have led to spectacular meteor outbursts and storms in the past. In this work, we find a new resonance mechanism involving three bodies -- i.e. meteoroid particle, Jupiter and Saturn, in the Perseid meteoroid stream. Long-term three-body resonances are not very common in real small bodies in our solar system although they can mathematically exist at many resonant sweet spots in an abstract sense in any dynamical system. This particular resonance combination in the Perseid stream is such that it is close to the ratio of 1:4:10 if the orbital periods of Perseid particle, Saturn and Jupiter are considered respectively. These resonant Perseid meteoroids stay resonant for...
Three-Body Interaction of Rydberg Slow-Light Polaritons
Jachymski, Krzysztof; Bienias, Przemysław; Büchler, Hans Peter
2016-07-01
We study a system of three photons in an atomic medium coupled to Rydberg states near the conditions of electromagnetically induced transparency. Based on the analytical analysis of the microscopic set of equations in the far-detuned regime, the effective three-body interaction for these Rydberg polaritons is derived. For slow light polaritons, we find a strong three-body repulsion with the remarkable property that three polaritons can become essentially noninteracting at short distances. This analysis allows us to derive the influence of the three-body repulsion on bound states and correlation functions of photons propagating through a one-dimensional atomic cloud.
Intelligent battery charging system
Everett, Hobert R., Jr.
1991-09-01
The present invention is a battery charging system that provides automatic voltage selection, short circuit protection, and delayed output to prevent arcing or pitting. A second embodiment of the invention provides a homing beacon which transmits a signal so that a battery powered mobile robot may home in on and contact the invention to charge its battery. The invention includes electric terminals isolated from one another. One terminal is grounded and the other has a voltage applied to it through a resistor connected to the output of a DC power supply. A voltage scaler is connected between the resistor and the hot terminal. An On/Off controller and a voltage mode selector sense the voltage provided at the output of the voltage scaler.
Resonance model for the three-body states of the A=6 reactions
Directory of Open Access Journals (Sweden)
Paris Mark W.
2016-01-01
Full Text Available We present an R-matrix-based model for three-body final states that has aspects of the Faddeev approach to three-particle scattering. The model is applied to describing the nucleon spectra for breakup reactions in the A = 6 systems. Calculations using a charge-symmetric parametrization agree fairly well with the experimental data, although they indicate larger contributions from the 5He or 5Li ground state are necessary.
Formation reconfiguration in restricted three body problem
Institute of Scientific and Technical Information of China (English)
Shengping Gong; Junfeng Li; Hexi Baoyin; Yunfeng Gao
2007-01-01
Reconfiguration of formation flying around a halo orbit of the Sun-Earth restricted three body system is investigated with impulse maneuvers. For a short time reconfiguration, the two-impulse maneuver is investigated with both analytical and numerical methods and the BeginningEnding (BE) method is proven to be an energy-optimal one of all two-impulse (TI) reconfigurations, and the energy consumption of BE is independent of the position of the chief spacecraft, and decreases with the reconfiguration time.Then, genetic algorithm is adopted to optimize the energy consumption. The results show that the optimal energy increases with radius difference between the initial and final orbits, and decreases with the reconfiguration time.
International Nuclear Information System (INIS)
The effect of dominant three-body interaction to the hard-core boson Hubbard model is studied on a two-dimensional square lattice. In terms of the quantum Monte Carlo method, a ρ = 2/3 solid phase is shown explicitly with the coexistence of a charge-density wave and a bond-order wave appearing due to the presence of the dominant three-body interaction. For the strong three-body interaction, the ρ = 2/3 solid phase appears between superfluid phases and shrinks as the strength of the three-body interaction decreases, forming a lobe structure in the phase diagram. For weak three-body interactions, the superfluid phase exists for the whole range of hard-core densities except the full filled case, where the system is a Mott insulator. Our results may be realized in cold-atom experiments.
Liang, Ying; Guo, Huaiming
2012-09-01
The effect of dominant three-body interaction to the hard-core boson Hubbard model is studied on a two-dimensional square lattice. In terms of the quantum Monte Carlo method, a ρ = 2/3 solid phase is shown explicitly with the coexistence of a charge-density wave and a bond-order wave appearing due to the presence of the dominant three-body interaction. For the strong three-body interaction, the ρ = 2/3 solid phase appears between superfluid phases and shrinks as the strength of the three-body interaction decreases, forming a lobe structure in the phase diagram. For weak three-body interactions, the superfluid phase exists for the whole range of hard-core densities except the full filled case, where the system is a Mott insulator. Our results may be realized in cold-atom experiments.
Model Study of Three-Body Forces in the Three-Body Bound State
Liu, H; Glöckle, W; Elster, Ch.
2003-01-01
The Faddeev equations for the three-body bound state with two- and three-body forces are solved directly as three-dimensional integral equation. The numerical feasibility and stability of the algorithm, which does not employ partial wave decomposition is demonstrated. The three-body binding energy and the full wave function are calculated with Malfliet-Tjon-type two-body potentials and scalar Fujita-Miyazawa type three-body forces. The influence of the strength and range of the three-body force on the wave function, single particle momentum distributions and the two-body correlation functions are studied in detail. The extreme case of pure three-body forces is investigated as well.
Lavine method applied to three body problems
International Nuclear Information System (INIS)
The methods presently proposed for the three body problem in quantum mechanics, using the Faddeev approach for proving the asymptotic completeness, come up against the presence of new singularities when the potentials considered v(α)(x(α)) for two-particle interactions decay less rapidly than /x(α)/-2; and also when trials are made for solving the problem with a representation space whose dimension for a particle is lower than three. A method is given that allows the mathematical approach to be extended to three body problem, in spite of singularities. Applications are given
Naive Dimensional Analysis for Three-Body Forces Without Pions
Griesshammer, Harald W.
2005-01-01
For systems of three identical particles in which short-range forces produce shallow two-particle bound states, and in particular for the ``pion-less'' Effective Field Theory of Nuclear Physics, I extend and systematise the power-counting of three-body forces to all partial-waves and orders, including external currents. With low-energy observables independent of the details of short-distance dynamics, the typical strength of a three-body force is determined from the superficial degree of dive...
A solution of the Coulomb three-body problem
International Nuclear Information System (INIS)
In this work, a final state wave function is constructed which represents a solution of the three-body Schroedinger equation. The formulated wave function is superimposed of one basic analytical function with various parameters. The coefficients of these basic functions involved in final state wave function can be easily calculated from a set of linear equations. The coefficients depend only on incident energy of the system. The process can also be prolonged for application to the problems involving more than three bodies. (author)
Supercircle description of universal three-body states in two dimensions
Bellotti, F. F.; Frederico, T.; Yamashita, M. T.; Fedorov, D. V.; Jensen, A. S.; Zinner, N. T.
2012-02-01
Bound states of asymmetric three-body systems confined to two dimensions are currently unknown. In the universal regime, two energy ratios and two mass ratios provide complete knowledge of the three-body energy measured in units of one two-body energy. We compute the three-body energy for general systems using numerical momentum-space techniques. The lowest number of stable bound states is produced when one mass is larger than two similar masses. We focus on selected asymmetric systems of interest in cold atom physics. The scaled three-body energy and the two scaled two-body energies are related through an equation for a supercircle whose radius increases almost linearly with three-body energy. The exponents exhibit an increasing behavior with three-body energy. The mass dependence is highly nontrivial. Based on our numerical findings, we give a simple relation that predicts the universal three-body energy.
Folding model with three-body force
International Nuclear Information System (INIS)
The folding model has been applied to study the roles of the centre of mass and Pauli pair correlations in shaping the density dependence of the effective two-body interaction as given by the three-body force under the short range approximation. (author). 9 refs
Three-body forces and the trinucleons
International Nuclear Information System (INIS)
Three-body forces are discussed in the context of classical, atomic, solid-state and nuclear physics. The basic theoretical ingredients used in the construction of such forces are reviewed. Experimental evidence for three-nucleon forces and an overview of the three-nucleon bound states are presented. 53 refs., 9 figs
On gravitational waves from classical three body problem
Fiziev, Plamen P
2016-01-01
Using an effective one body approach we describe in detail gravitational waves from classical three body problem on a non-rotating straight line and derive their basic physical characteristics. Special attention is paid to the irregular motions of such systems and to the significance of double and triple collisions. The conclusive role of the collinear solutions is also discussed in short.
Optimization of the variational basis in the three body problem
International Nuclear Information System (INIS)
The procedure of variational oscillator basis optimization is proposed to the calculation the energy spectra of three body systems. The hierarchy of basis functions is derived and energies of ground and excited states for three gravitating particles is obtained with high accuracy. 12 refs
Exponential representation in the Coulomb three-body problem
International Nuclear Information System (INIS)
The exponential representation in the Coulomb three-body problem is considered. It is shown that the exponential variational expansion in relative coordinates r32, r31 and r21 has a number of advantages for the bound state calculations in Coulomb three-body systems. Moreover, it appears that the exponential (or Laplace-Fourier) representation of the Coulomb three-body problem is an optimal approach to analyse and solve various three-body problems. The optimization of nonlinear parameters in the trial wavefunctions is also considered. The developed methods are used to determine the highly accurate ground 11S(L = 0)-state energies and other bound state properties for a number of He-like two-electron ions (Li+, Be2+, B3+, C4+, N5+, O6+, F7+ and Ne8+). To represent the ground state energies of these He-like ions we apply the Z-1 expansion. The asymptotic form of the ground state wavefunctions at large electron-nuclear distances for the He-like ions is briefly discussed. Considered hypervirial theorems are of great interest for these ions, since they allow one to obtain some useful relations between different expectation values. The generalization of the exponential variational expansion in relative coordinates to the four-body non-relativistic systems is also considered
The three-body problem from Pythagoras to Hawking
Valtonen, Mauri; Kholshevnikov, Konstantin; Mylläri, Aleksandr; Orlov, Victor; Tanikawa, Kiyotaka
2016-01-01
This book, written for a general readership, reviews and explains the three-body problem in historical context reaching to latest developments in computational physics and gravitation theory. The three-body problem is one of the oldest problems in science and it is most relevant even in today’s physics and astronomy. The long history of the problem from Pythagoras to Hawking parallels the evolution of ideas about our physical universe, with a particular emphasis on understanding gravity and how it operates between astronomical bodies. The oldest astronomical three-body problem is the question how and when the moon and the sun line up with the earth to produce eclipses. Once the universal gravitation was discovered by Newton, it became immediately a problem to understand why these three-bodies form a stable system, in spite of the pull exerted from one to the other. In fact, it was a big question whether this system is stable at all in the long run. Leading mathematicians attacked this problem over more than...
Resonance poles in three-body systems
Pearce, B. C.; Afnan, I. R.
1984-12-01
We develop a method for finding resonance poles in Faddeev equations. The method is computationally simpler than previous methods and is based on the rotation of contour technique. It is applied to πd elastic scattering with coupling to the NΔ channel. The position of the pole is compared with predictions based on Argand diagram and speed analysis. We find that the conventional methods are unreliable if the pole is further from the real axis than the Δ resonance pole.
Restricted three body problems at the nanoscale
Chan, Yue; Thamwattana, Ngamta; Hill, James M.
2009-01-01
In this paper, we investigate some of the classical restricted three body problems at the nanoscale, such as the circular planar restricted problem for three C60 fullerenes, and a carbon atom and two C60 fullerenes. We model the van der Waals forces between the fullerenes by the Lennard-Jones potential. In particular, the pairwise potential energies between the carbon atoms on the fullerenes are approximated by the continuous approach, so that the total molecular energy between two fullerenes...
Smart electric vehicle charging system
João C. Ferreira; Monteiro, Vítor Duarte Fernandes; João L Afonso; Silva, Alberto R.
2011-01-01
In this work is proposed the design of a system to create and handle Electric Vehicles (EV) charging procedures, based on intelligent process. Due to the electrical power distribution network limitation and absence of smart meter devices, Electric Vehicles charging should be performed in a balanced way, taking into account past experience, weather information based on data mining, and simulation approaches. In order to allow information exchange and to help user ...
Three-body scattering at intermediate energies
International Nuclear Information System (INIS)
The Faddeev equation for three-body scattering at arbitrary energies is formulated in momentum space and directly solved in terms of momentum vectors without employing a partial-wave decomposition. In its simplest form, the Faddeev equation for identical bosons, which we are using, is a three-dimensional integral equation in five variables, magnitudes of relative momenta and angles. This equation is solved through Pade summation. Based on a Malfliet-Tjon-type potential, the numerical feasibility and stability of the algorithm for solving the Faddeev equation is demonstrated. Special attention is given to the selection of independent variables and the treatment of three-body breakup singularities with a spline-based method. The elastic differential cross section, semiexclusive d(N,N') cross sections, and total cross sections of both elastic and breakup processes in the intermediate-energy range up to about 1 GeV are calculated and the convergence of the multiple-scattering series is investigated in every case. In general, a truncation in the first or second order in the two-body t matrix is quite insufficient
Three-Body Scattering at Intermediate Energies
Liu, H; Glöckle, W; Elster, Ch.
2004-01-01
The Faddeev equation for three-body scattering at arbitrary energies is formulated in momentum space and directly solved in terms of momentum vectors without employing a partial wave decomposition. In its simplest form the Faddeev equation for identical bosons, which we are using, is a three-dimensional integral equation in five variables, magnitudes of relative momenta and angles. This equation is solved through Pade summation. Based on a Malfliet-Tjon-type potential, the numerical feasibility and stability of the algorithm for solving the Faddeev equation is demonstrated. Special attention is given to the selection of independent variables and the treatment of three-body break-up singularities with a spline based method. The elastic differential cross section, semi-exclusive d(N,N') cross sections and total cross sections of both elastic and breakup processes in the intermediate energy range up to about 1 GeV are calculated and the convergence of the multiple scattering series is investigated in every case....
Borromean three-body FRET in frozen Rydberg gases
Faoro, R.; Pelle, B.; A. Zuliani; Cheinet, P.; Arimondo, E.; Pillet, P.
2015-01-01
Controlling the interactions between ultracold atoms is crucial for quantum simulation and computation purposes. Highly excited Rydberg atoms are considered in this prospect for their strong and controllable interactions known in the dipole-dipole case to induce non-radiative energy transfers between atom pairs, similarly to fluorescence resonance energy transfer (FRET) in biological systems. Here we predict few-body FRET processes in Rydberg atoms and observe the first three-body resonance e...
Transient analysis of charging system with centrifugal charging pumps
International Nuclear Information System (INIS)
The CARD (CVCS Analysis for Design) code has been developed for the transient analysis of the letdown and charging system of Korea Standard Nuclear Power Plant. The computer code has been already verified and validated by comparing with actual test results. Analyzed in this paper are the flow and pressure transients in the charging line. The sensitivity studies are performed to select the acceptable control parameters of charging line backpressure controller and seal injection flow controller. In addition, the seal injection system transient is evaluated for the pressurizer auxiliary spray operation. It is shown that the charging line backpressure controller control parameters yield a significant effect on the charging system stability. The results obtained from this study will be used to verify the system design and to select the optimum control parameters for the charging system with centrifugal charging pumps
Optimized lower bounds in the three-body problem
International Nuclear Information System (INIS)
We derive new lower bounds on three-body ground-state energies in terms of two-body binding energies. For three-body systems with different masses, we obtain a significant improvement as compared to previous results. In particular, the present method leads to exact results in the case of harmonic interactions, as opposed to what was found previously. It sheds light on the mechanism by which such bounds are obtained and appears to be extendable to four and more particles. The numerical results displayed show up to be very accurate estimates of the exact values, and can be used as checks in actual numerical calculations. Possible applications or generalizations are briefly outlined. (orig.)
Naive Dimensional Analysis for Three-Body Forces Without Pions
Griesshammer, H W
2005-01-01
For systems of three identical particles in which short-range forces produce shallow two-particle bound states, and in particular for the ``pion-less'' Effective Field Theory of Nuclear Physics, I extend and systematise the power-counting of three-body forces to all partial-waves and orders, including external currents. With low-energy observables independent of the details of short-distance dynamics, the typical strength of a three-body force is determined from the superficial degree of divergence of the three-body diagrams which contain only two-body forces. This na\\"ive dimensional analysis must be amended as the asymptotic solution to the leading-order Faddeev equation depends for large off-shell momenta crucially on the partial wave and spin-combination of the system. It is shown by analytic construction to be weaker in most channels with angular momentum smaller than 3 than expected. This demotes many three-nucleon forces to high orders. Observables like the quartet-S-scattering length are less sensitiv...
Naive dimensional analysis for three-body forces without pions
International Nuclear Information System (INIS)
For systems of three identical particles in which short-range forces produce shallow two-particle bound states, and in particular for the 'pionless' effective field theory of nuclear physics, I extend and systematise the power-counting of three-body forces to all partial waves and orders, including external currents. With low-energy observables independent of the details of short-distance dynamics, the typical strength of a three-body force is determined from the superficial degree of divergence of the three-body diagrams which contain only two-body forces. This naive dimensional analysis must be amended as the asymptotic solution to the leading-order Faddeev equation depends for large off-shell momenta crucially on the partial wave and spin combination of the system. It is shown by analytic construction to be weaker than expected in most channels with angular momentum smaller than 3. This demotes many three-nucleon forces to high orders. Observables like the 4S3/2-scattering length are less sensitive to three-nucleon forces than guessed. I also comment on the Efimov effect and limit-cycle for non-zero angular momentum
Indian Academy of Sciences (India)
M Saha Sarkar; S Sarkar
2015-09-01
New experimental data on 2+ energies of 136,138Sn confirm the trend of lower 2+ excitation energies of even–even tin isotopes with > 82 compared to those with N < 82. However, none of the theoretical predictions using both realistic and empirical interactions can reproduce experimental data on excitation energies as well as the transition probabilities ((2; 6+ → 4+)) of these nuclei, simultaneously, apart from the ones whose matrix elements have been changed empirically to produce mixed seniority states by weakening the pairing. We have shown that the experimental result also shows good agreement with the theory in which three-body forces have been included in a realistic interaction. The new theoretical results on transition probabilities are discussed to identify the experimental quantities which will clearly distinguish between different views.
Three-body scattering without partial waves
International Nuclear Information System (INIS)
The Faddeev equation for three-body scattering at arbitrary energies is formulated in momentum space and directly solved in terms of momentum vectors without employing a partial wave decomposition. In its simplest form the Faddeev equation for identical bosons is a three-dimensional integral equation in five variables, magnitudes of relative momenta and angles. The elastic differential cross section, semi-exclusive d(N,N') cross sections and total cross sections of both elastic and breakup processes in the intermediate energy range up to about 1 GeV are calculated based on a Malfliet-Tjon type potential, and the convergence of the multiple scattering series is investigated in every case. In general a truncation in the first or second order in the two-body t-matrix is quite insufficient
Three-Body Scattering without Partial Waves
Liu, H; Glöckle, W; Elster, Ch.
2004-01-01
The Faddeev equation for three-body scattering at arbitrary energies is formulated in momentum space and directly solved in terms of momentum vectors without employing a partial wave decomposition. In its simplest form the Faddeev equation for identical bosons is a three-dimensional integral equation in five variables, magnitudes of relative momenta and angles. The elastic differential cross section, semi-exclusive d(N,N') cross sections and total cross sections of both elastic and breakup processes in the intermediate energy range up to about 1 GeV are calculated based on a Malfliet-Tjon type potential, and the convergence of the multiple scattering series is investigated in every case. In general a truncation in the first or second order in the two-body t-matrix is quite insufficient.
Three-body Coulomb breakup of 11Li in the complex scaling method
Myo, T.; Aoyama, S.; Kato, K.; Ikeda, K.
2003-01-01
Coulomb breakup strengths of 11Li into a three-body 9Li+n+n system are studied in the complex scaling method. We decompose the transition strengths into the contributions from three-body resonances, two-body ``10Li+n'' and three-body ``9Li+n+n'' continuum states. In the calculated results, we cannot find the dipole resonances with a sharp decay width in 11Li. There is a low energy enhancement in the breakup strength, which is produced by both the two- and three-body continuum states. The enha...
The three-body problem in quantum mechanics
International Nuclear Information System (INIS)
Different methods used in the analysis of the scattering of an elementary particle by a system of two bound particles are compared. All particles are considered spinless and distinguishable from each other. Two approaches are used in the treatment of the problem. In the first method we build an effective - potential which accounts for the interaction of the incident particle with the bound system. The second approach consists in treating the target as a system of two particles, whose momentum distribution is given by the bound state wavefunction. The three body system is then treated by the techniques of the multiple scattering series and of Glauber theory. (author)
Pseudotensor mesons as three-body resonances
Roca, L
2011-01-01
We show that the lightest pseudotensor mesons J^{PC}=2^-+ can be regarded as molecules made of a pseudoscalar (P) 0^-+ and a tensor 2^++ meson, where the latter is itself made of two vector (V) mesons. The idea stems from the fact that the vector-vector interaction in s-wave and spin 2 is very strong, to the point of generating the 2^++ tensor mesons. On the other hand the interaction of a pseudoscalar with a vector meson in s-wave is also very strong and it generates dynamically the lightest axial-vector mesons. Therefore we expect the PVV interaction to be strongly attractive and thus able to build up quasibound PVV resonances. We calculate the three body PVV interaction by using the fixed center approximation to the Faddeev equations where the two vectors are clustered forming a tensor meson. We find clear resonant structures which can be identified with the pi_2(1670), eta_2(1645) and K^*_2(1770) (2^-+) pseudotensor mesons.
Spectra for the A = 6 reactions calculated from a three-body resonance model
Paris, Mark W.; Hale, Gerald M.
2016-06-01
We develop a resonance model of the transition matrix for three-body breakup reactions of the A = 6 system and present calculations for the nucleon observed spectra, which are important for inertial confinement fusion and Big Bang nucleosynthesis (BBN). The model is motivated by the Faddeev approach where the form of the T matrix is written as a sum of the distinct Jacobi coordinate systems corresponding to particle configurations (α, n-n) and (n; n-α) to describe the final state. The structure in the spectra comes from the resonances of the two-body subsystems of the three-body final state, namely the singlet (T = 1) nucleon-nucleon (NN) anti-bound resonance, and the Nα resonances designated the ground state (Jπ = {{{3^ - }} over 2}) and first excited state (Jπ = {{{1^ - }} over 2}) of the A = 5 systems 5He and 5Li. These resonances are described in terms of single-level, single-channel R-matrix parameters that are taken from analyses of NN and Nα scattering data. While the resonance parameters are approximately charge symmetric, external charge-dependent effects are included in the penetrabilities, shifts, and hard-sphere phases, and in the level energies to account for internal Coulomb differences. The shapes of the resonance contributions to the spectrum are fixed by other, two-body data and the only adjustable parameters in the model are the combinatorial amplitudes for the compound system. These are adjusted to reproduce the observed nucleon spectra from measurements at the Omega and NIF facilities. We perform a simultaneous, least-squares fit of the tt neutron spectra and the 3He3He proton spectra. Using these amplitudes we make a prediction of the α spectra for both reactions at low energies. Significant differences in the tt and 3He3He spectra are due to Coulomb effects.
Correlations in charged bosons systems
International Nuclear Information System (INIS)
The two and three-dimensional charge Bose gas have been studied. In the bidimensional case two different types of interaction were considered: l/r and l n(r). The method of self-consistent-field was applied to these systems, which takes into account the short range correlations between the bosons through a local-field correction. By using self-consistent numerical calculations, the structure factor S(k→) was determined. The pair-correlation function, the ground-state energy, the pressure of the gas and the spectrum of elementary excitations were obtained from S (k→). The screening density induced by a fixed charged impurity was calculated. In the high-density limit our calculations reproduce the results given by Bogoliubov's perturbation theory. In the intermediate-density region, corresponding to the strongly coupled systems, the results are in very good agreement with calculations based on HNC approximation as well as Monte Carlo method. The results are compared in several situations with RPA results showing that the self-consistent method is much more accurate. The two-dimensional systems showed to be more correlated than the three-dimensional systems showed to be more correlated than the three-dimensional one; the gas with interaction l/r is also more correlated than the logarithmic one at high densities, but it begins to be less correlated than this one in the low-density region. The thermodynamic functions of the two and three-dimensional systems at finite temperatures near absolute zero are calculated based upon the gas excitation spectra at zero temperature. (author)
Tuffner, Francis K.; Kintner-Meyer, Michael C. W.; Hammerstrom, Donald J.; Pratt, Richard M.
2012-05-22
Battery charging control methods, electric vehicle charging methods, battery charging apparatuses and rechargeable battery systems. According to one aspect, a battery charging control method includes accessing information regarding a presence of at least one of a surplus and a deficiency of electrical energy upon an electrical power distribution system at a plurality of different moments in time, and using the information, controlling an adjustment of an amount of the electrical energy provided from the electrical power distribution system to a rechargeable battery to charge the rechargeable battery.
Very massive runaway stars from three-body encounters
Gvaramadze, V V
2010-01-01
Very massive stars preferentially reside in the cores of their parent clusters and form binary or multiple systems. We study the role of tight very massive binaries in the origin of the field population of very massive stars. We performed numerical simulations of dynamical encounters between single (massive) stars and a very massive binary with parameters similar to those of the most massive known Galactic binaries, WR 20a and NGC 3603-A1. We found that these three-body encounters could be responsible for the origin of high peculiar velocities ($\\geq$ 70 km/s) observed for some very massive ($\\geq$ 60-70 Msun) runaway stars in the Milky Way and the Large Magellanic Cloud (e.g., $\\lambda$ Cep, BD+43 3654, Sk-67 22, BI 237, 30 Dor 016), which can hardly be explained within the framework of the binary-supernova scenario. The production of high-velocity massive stars via three-body encounters is accompanied by the recoil of the binary in the opposite direction to the ejected star. We show that the relative positi...
Quantum State Engineering with Circuit Electromechanical Three-Body Interactions
Abdi, Mehdi; Pernpeintner, Matthias; Gross, Rudolf; Huebl, Hans; Hartmann, Michael J.
2015-05-01
We propose a hybrid system with quantum mechanical three-body interactions between photons, phonons, and qubit excitations. These interactions take place in a circuit quantum electrodynamical architecture with a superconducting microwave resonator coupled to a transmon qubit whose shunt capacitance is free to mechanically oscillate. We show that this system design features a three-mode polariton-mechanical mode and a nonlinear transmon-mechanical mode interaction in the strong coupling regime. Together with the strong resonator-transmon interaction, these properties provide intriguing opportunities for manipulations of this hybrid quantum system. We show, in particular, the feasibility of cooling the mechanical motion down to its ground state and preparing various nonclassical states including mechanical Fock and cat states and hybrid tripartite entangled states.
Natural orbital expansions of highly accurate three-body wavefunctions
International Nuclear Information System (INIS)
Natural orbital expansions are considered for highly accurate three-body wavefunctions written in the relative coordinates r32, r31 and r21. Our present method is applied to the ground S(L = 0) -state wavefunctions of the Ps- and inftyH- ions. Our best variational energies computed herein for these systems are E(Ps-) = -0.262 005 070 232 980 107 7666 au and E(inftyH- =-0.5277510165443771965865 au, respectively. The variational wavefunctions determined for these systems contain between 2000 and 4200 exponential basis functions. In general, the natural orbital expansions of these functions are compact and rapidly convergent functions, which are represented as linear combinations of some relatively simple functions. The natural orbitals can be very useful in various applications, including photodetachment and scattering problems
Classifying orbits in the restricted three-body problem
Zotos, Euaggelos E
2015-01-01
The case of the planar circular restricted three-body problem is used as a test field in order to determine the character of the orbits of a small body which moves under the gravitational influence of the two heavy primary bodies. We conduct a thorough numerical analysis on the phase space mixing by classifying initial conditions of orbits and distinguishing between three types of motion: (i) bounded, (ii) escape and (iii) collisional. The presented outcomes reveal the high complexity of this dynamical system. Furthermore, our numerical analysis shows a remarkable presence of fractal basin boundaries along all the escape regimes. Interpreting the collisional motion as leaking in the phase space we related our results to both chaotic scattering and the theory of leaking Hamiltonian systems. We also determined the escape and collisional basins and computed the corresponding escape/collisional times. We hope our contribution to be useful for a further understanding of the escape and collisional mechanism of orbi...
Normalization of the covariant three-body bound state vertex function
Adam, J; Savkli, C; Van Orden, J W; Gross, Franz; Savkli, Cetin
1997-01-01
The normalization condition for the relativistic three nucleon Bethe-Salpeter and Gross bound state vertex functions is derived, for the first time, directly from the three body wave equations. It is also shown that the relativistic normalization condition for the two body Gross bound state vertex function is identical to the requirement that the bound state charge be conserved, proving that charge is automatically conserved by this equation.
Borromean three-body FRET in frozen Rydberg gases
Faoro, R.; Pelle, B.; Zuliani, A.; Cheinet, P.; Arimondo, E.; Pillet, P.
2015-09-01
Controlling the interactions between ultracold atoms is crucial for quantum simulation and computation purposes. Highly excited Rydberg atoms are considered in this prospect for their strong and controllable interactions known in the dipole-dipole case to induce non-radiative energy transfers between atom pairs, similarly to fluorescence resonance energy transfer (FRET) in biological systems. Here we predict few-body FRET processes in Rydberg atoms and observe the first three-body resonance energy transfer in cold Rydberg atoms using cold caesium atoms. In these resonances, additional relay atoms carry away an energy excess preventing the two-body resonance, leading thus to a Borromean type of energy transfer. These few-body processes present strong similarities with multistep FRET between chromophores sometimes called donor-bridge-acceptor or superexchange. Most importantly, they generalize to any Rydberg atom and could lead to new implementations of few-body quantum gates or entanglement.
Two-body and three-body halo nuclei
Institute of Scientific and Technical Information of China (English)
刘祖华; 张焕乔
2003-01-01
We have extracted the nuclear asymptotic normalization coefficients (ANC) for the virtual transitions B→A+N via some transfer reactions and the radioactive nuclear beam experiments. With these coefficients, root-mean-square (rms) radii for the valence particle in some possible halo nuclei have been calculated. The values of rms radii extracted with ANC approach are nearly model-independent, hence are a good quantity for the investigation of nuclear halo. In addition, we have also calculated the rms radii for the two valence neutrons in some three-body systems in terms of the relationship between the radii of valence particle, core nucleus and nuclear matter. With two conditions for nuclear halo formation, we have examined these extracted rms radii. The results show that 11Be(1/2+, g.s), 12B(1-, 2.621 MeV), 13C(1/2+, 3.089 MeV), 14C(0-, 6.903 MeV), 14C(1-, 6.094 MeV), 15C(1/2+, g.s) and 19C(1/2+, g.s) with the valence particle in the 2s ground or excited state are the neutron halo nuclei, whereas 17F(1/2+, 0.495 MeV) and 21Na(1/2+, 2.423 MeV) are the proton halo nuclei in the excited state. For three-body systems, except the well-established two-neutron halo nuclei 6He and 11Li, 14Be and 17B might be the two-neutron halo nuclei as well.
Charge transfer in ionic systems
International Nuclear Information System (INIS)
Charge transfer involving multiply charged ions in collision with atomic or molecular targets are determinant processes in controlled thermonuclear fusion research and astrophysical plasma. In such processes, an electron is generally captured in a excited state of the ion, followed by line emission. The observation of line intensities provides important information on the electron temperature, density and spacial distributions in the emitting region of the plasma. From a theoretical point of view, different approaches may be used with regard to the collisional energy range of the process. A semi-classical method is currently used at keV energies, but the description of very low-velocity processes requires a complete quantum mechanical treatment of the dynamics of both electrons and nuclei. The first approach extensively used is the resolution of the stationary close-coupling equations, but we have analyzed recently the efficiency of a time-dependent wave packet method which provides a clear and physical insight into the dynamics of the processes and may be particularly interesting for polyatomic systems since it allows the possibility of developing a fully quantal mechanical treatment for some degrees of freedom, the other ones being treated classically. The keV energy range treatment is presented on two examples pointing out the case of complex ion-atom collision systems, as well as the differences between ion-atom and ion-molecule mechanisms. In connection with translation energy spectroscopy experiments of McLaughlin et al in the 4-28 keV impact energy range, we present a complete ab-initio theoretical approach of the N4+(2s)2S + He system taking into account both single and double electron capture channels. This is an extremely complex collisional system which involves numerous channels with short range interactions and a very intricate interaction region may be observed for interatomic distances around R = 3.5 a.u.. In agreement with experimental data, the
QED effects in high-Z atoms; three-body potentials
International Nuclear Information System (INIS)
Electromagnetic three-body potentials were first studied by Primakoff and Holstein. Later, Chamugan and Schweber rederived these potentials and pointed out that they might be important in highly relativistic systems, however, their formulation was basically nonrelativistic. Mittleman, in a series of papers, constructed configuration space equations that included three-body potentials. His derivation started from first principles i.e. QED, and the resulting three-body potentials are more general than the Primakoff-Holstein potentials. In this thesis the contribution to the binding energy of a simple high-Z ion from the three-body potentials is calculated. In addition, the nature and structure of these potentials in greater detail are studied. Some ambiguities that arise when the transition from Fock to configuration space is made are studied in detail
International Nuclear Information System (INIS)
A program to solve the quantum-mechanical collinear three-body Coulomb problem is described and illustrated by calculations for a number of representative systems and processes. In the internal region, the Schroedinger equation is solved in hyperspherical coordinates using the slow/smooth variable discretization method. In asymptotic regions, the solution is obtained in Jacobi coordinates using the asymptotic package GAILIT from the CPC library. Only bound states and scattering processes below the three-body disintegration threshold are considered here; resonances and fragmentation processes will be discussed in subsequent parts of this series. (author)
Efimov Effect in Nuclear Three-Body Resonance Decays
Garrido, Eduardo; Fedorov, D. V.; Jensen, A. S.
2006-01-01
We investigate the effects of the nearly fulfilled Efimov conditions on the properties of three-body esonances. Using the hyper-spheric adiabatic expansion method we compute energy distributions of fragments in a three-body decay of a nuclear resonance. As a realistic example we investigate the 1- state in the halo nucleus 11Li within a three-body 9Li + n + n model. Characteristic features appear as sharp peaks in the energy distributions. Their origin, as in the Efimov effect, is in the ...
Three-body recombination in a quasi-two-dimensional quantum gas
Huang, Bo; Zenesini, Alessandro; Grimm, Rudolf
2016-05-01
Quantum three-body recombination in three-dimensional systems is influenced by a series of weakly bound trimers known as Efimov states, which are induced by short-range interactions and exhibit a discrete scaling symmetry. On the other hand, two-dimensional systems with contact interactions are characterized by continuous scale invariance and support no Efimov physics. This raises questions about the behaviour of three-body recombination in the transition from three to two dimensions. We use ultracold caesium atoms trapped in anisotropic potentials formed by a pair of counter-propagating laser beams to experimentally investigate three-body recombination in quasi-two-dimensional systems with tunable confinement and tunable interactions. In our recent experiments, we observed a smooth transition of the three-body recombination rate coefficient from a three-dimensional to a deeply quasi-two-dimensional system. A comparison between the results obtained near two Feshbach resonances indicates a universal behaviour of three-body recombination in the quasi-two-dimensional regime. Austrian Science Fund FWF within project P23106.
Planetary and satellite three body mean motion resonances
Gallardo, Tabaré; Badano, Luciana
2016-01-01
We propose a semianalytical method to compute the strengths on each of the three massive bodies participating in a three body mean motion resonance (3BR). Applying this method we explore the dependence of the strength on the masses, the orbital parameters and the order of the resonance and we compare with previous studies. We confirm that for low eccentricity low inclination orbits zero order resonances are the strongest ones; but for excited orbits higher order 3BRs become also dynamically relevant. By means of numerical integrations and the construction of dynamical maps we check some of the predictions of the method. We numerically explore the possibility of a planetary system to be trapped in a 3BR due to a migrating scenario. Our results suggest that capture in a chain of two body resonances is more probable than a capture in a pure 3BR. When a system is locked in a 3BR and one of the planets is forced to migrate the other two can react migrating in different directions. We exemplify studying the case of...
Directory of Open Access Journals (Sweden)
Nutan Singh
2013-11-01
Full Text Available This paper deals with the stability of triangular Lagrangian points in the elliptical restricted three body problem, under the effect of radiation pressure stemming from the more massive primary on the infinitesimal. We adopted a set of rotating pulsating axes centered at the centre of mass of the two primaries Sun and Jupiter. We have exploited method of averaging used by Grebenikov, throughout the analysis of stability of the system. The critical mass ratio depends on the radiation pressure, eccentricity and the range of stability decreases as the radiation parameter increases. Keywords: Dynamical system, elliptical restricted three body problems, lagrangian points, radiation pressure, and stability.
Relativistic three-body quark model of light baryons based on hypercentral approach
International Nuclear Information System (INIS)
In this paper, we have treated the light baryons as a relativistic three-body bound system. Inspired by lattice QCD calculations, we treated baryons as a spin-independent three-quark system within a relativistic three-quark model based on the three-particle Klein–Gordon equation. We presented the analytical solution of three-body Klein–Gordon equation with employing the constituent quark model based on a hypercentral approach through which two- and three-body forces are taken into account. Herewith the average energy values of the up, down and strange quarks containing multiplets are reproduced. To describe the hyperfine structure of the baryon, the splittings within the SU(6)-multiplets are produced by the generalized Gursey Radicati mass formula. The considered SU(6)-invariant potential is popular “Coulomb-plus-linear” potential and the strange and non-strange baryons spectra are in general well reproduced. (author)
Boundedness of Formation Configuration for Nonlinear Three-body Dynamics
Institute of Scientific and Technical Information of China (English)
LI Peng; SONG Yongduan
2011-01-01
The configuration boundedness of the three-body model dynamics is studied for Sun-Earth formation flying missions. The three-body formation flying model is built up with considering the lunar gravitational acceleration and solar radiation pressure. Because traditional linearized dynamics based method has relatively lower accuracy, a modified nonlinear formation configuration analysis method is proposed in this paper. Comparative studies are carried out from three aspects, i.e., natural formation configuration with arbitrary departure time, initialization time and formation configuration boundedness, and specific initialization time for bounded formation configuration. Simulations demonstrate the differences between the two schemes,and indicate that the nonlinear dynamic method reduces the error caused by the model linearization and disturbance approximation, and thus provides higher accuracy for boundedness analysis, which is of value to initial parameters selection for natural three-body formation flying.
Analytical Solution of the Bosonic Three-Body Problem
International Nuclear Information System (INIS)
We revisit the problem of three identical bosons in free space, which exhibits a universal hierarchy of bound states (Efimov trimers). Modeling a narrow Feshbach resonance within a two-channel description, we map the integral equation for the three-body scattering amplitude to a one-dimensional Schroedinger-type single-particle equation, where an analytical solution of exponential accuracy is obtained. We give exact results for the trimer binding energies, the three-body parameter, the threshold to the three-atom continuum, and the recombination rate
Control microprocessor system for charge particle channeling
International Nuclear Information System (INIS)
Control microprocessor systems are widely applied not only in designing industrial robots but in providing functioning of different experimental plants. The experiment control system for charge particle channeling has been considered in the paper. Flexibility, relatively low cost and high reliability are advantages of these systems
Three-body halo nuclei in an effective theory framework
International Nuclear Information System (INIS)
The universal properties and structure of halo nuclei composed of two neutrons (2n) and a core are investigated within an effective quantum mechanics framework. We construct an effective interaction potential that exploits the separation of scales in halo nuclei and treat the nucleus as an effective three-body system, which to leading order is described by the large S-wave scattering lengths in the underlying two-body subsystems. The uncertainty from higher orders in the expansion is quantified through theoretical error bands. First, we investigate the possibility to observe excited Efimov states in 2n halo nuclei. Based on the experimental data, 20C is the only halo nucleus candidate to possibly have an Efimov excited state, with an energy less than 7 keV below the scattering threshold. Second, we study the structure of 20C and other 2n halo nuclei. In particular, we calculate their matter density form factors, radii, and two-neutron opening angles. We then make a systematic improvement upon these calculations by extending the effective potential to the next-to-leading order. To this order, we require an additional two-body parameter, which we tune to the effective range of the interaction. In addition to range corrections to the 2n halo nuclei results, we show corrections to the Efimov effect in the three-boson system. Furthermore, we explore universality in the linear range corrections to the Efimov spectrum. Finally, we study the scattering of D0 and D*0 mesons and their antiparticles off the X(3872) in an effective field theory for short-range interactions. We present results for the S-wave scattering amplitude, total interaction cross section and S-wave scattering length. (orig.)
Three-body halo nuclei in an effective theory framework
Energy Technology Data Exchange (ETDEWEB)
Canham, David L.
2009-05-20
The universal properties and structure of halo nuclei composed of two neutrons (2n) and a core are investigated within an effective quantum mechanics framework. We construct an effective interaction potential that exploits the separation of scales in halo nuclei and treat the nucleus as an effective three-body system, which to leading order is described by the large S-wave scattering lengths in the underlying two-body subsystems. The uncertainty from higher orders in the expansion is quantified through theoretical error bands. First, we investigate the possibility to observe excited Efimov states in 2n halo nuclei. Based on the experimental data, {sup 20}C is the only halo nucleus candidate to possibly have an Efimov excited state, with an energy less than 7 keV below the scattering threshold. Second, we study the structure of {sup 20}C and other 2n halo nuclei. In particular, we calculate their matter density form factors, radii, and two-neutron opening angles. We then make a systematic improvement upon these calculations by extending the effective potential to the next-to-leading order. To this order, we require an additional two-body parameter, which we tune to the effective range of the interaction. In addition to range corrections to the 2n halo nuclei results, we show corrections to the Efimov effect in the three-boson system. Furthermore, we explore universality in the linear range corrections to the Efimov spectrum. Finally, we study the scattering of D{sup 0} and D{sup *0} mesons and their antiparticles off the X(3872) in an effective field theory for short-range interactions. We present results for the S-wave scattering amplitude, total interaction cross section and S-wave scattering length. (orig.)
Three-body direct nuclear reactions: Nonlocal optical potential
Deltuva, A
2009-01-01
The calculations of three-body direct nuclear reactions with nonlocal optical potentials are performed for the first time using the framework of Faddeev-type scattering equations. Important nonlocality effect is found for transfer reactions like d+16O -> p + 17O often improving the description of the experimental data.
Satellite capture and the restricted three-body problem
International Nuclear Information System (INIS)
This is a general numerical study of satellite capture in the gravitational palnar restricted three-body problem. The initial motivation is a desire to understand the probable capture origin of the irregular Jovian satellites. The scope is broadened in order to developed a foundation for understanding gravitational capture in general. The two most important parameters are the mass ratio μ and the primary eccentricity ep. Each is varied separately, in order to isolate effects on capture by the smaller mass from the larger mass. The main results are summarized as follows: (1) In C0-x0 space, the capture time is an exceeding complex function. (2) The complexity is due to an infinite number of periodic orbit families. (3) The capture time is intimately connected to the periodic orbit families. (4) The structure of the periodic orbit families in the C0-x0 plane is self-similar, indicating that it is fractal. (5) The C0-x0 structure is very sensitive to ep. (6) There are two well-defined distributions in semimajor axis/eccentricity space of orbits around m1 (the more massive primary) that get capture by m2. The changes in a and e of these distributions are shown as a function of μ and of ep. (7) Capture into retrograde motion is much less probable than capture into prograde motion. (8) There is no distinction in semimajor axis, eccentricity, or orbit orientation between prograde and retrograde capture. (9) Capture occurs near primary pericenter. (10) For the current Jupiter-Sun system, capture occurs for heliocentric elements a ∼ 3.74-4.06 AU, and e ∼ 0.06-0.29
Correlation properties of a three-body bosonic mixture in a harmonic trap
DEFF Research Database (Denmark)
Barfknecht, R. E.; Salami Dehkharghani, Amin; Foerster, A.;
2016-01-01
We make use of a simple pair correlated wave function approach to obtain results for the ground-state densities and momentum distribution of a one-dimensional three-body bosonic system with different interactions in a harmonic trap. For equal interactions this approach is able to reproduce the...
Duffy, Brenton
The distinguishing characteristic of the elliptic restricted three-body problem from that of the circular case is a pulsating potential field resulting in non-autonomous and non-integrable spacecraft dynamics, which are difficult to model using classical methods of analysis. The purpose of this study is to harness modern methods of analytical perturbation theory to normalize the system dynamics about the circular restricted three-body problem and about one of the triangular Lagrange points. The normalization is achieved through a canonical transformation of the system Hamiltonian function based on the Lie transform method introduced by Hori and Deprit in the 1960s. The classic method derives a near-identity transformation of a Hamiltonian function expanded about a single parameter such that the transformed system possesses ideal properties of integrability. One of the major contributions of this study is to extend the normalization method to two-parameter expansions and to non-autonomous Hamiltonian systems. The two-parameter extension is used to normalize the system dynamics of the elliptic restricted three-body problem such that the stability of the triangular Lagrange points may be determined using the Kolmogorov-Arnold-Moser theorem. Further dynamical analysis is performed in the transformed phase space in terms of local integrals of motion akin to Jacobi's integral of the circular restricted three-body problem. The local phase space around the Lagrange point is foliated by invariant tori that effectively separate the planar dynamics into qualitative regions of motion. Additional analysis is presented for the incorporation of control into the normalization routine with the goal of eliminating the non-circular secular perturbations. The control method is validated on a test case and applied to the elliptic restricted three-body problem for the purposes of stabilizing the motion around the triangular Lagrange points.
Sarty, Adam James
The three-body photodisintegration of ^3He has been measured at energies below the pion production threshold using a continuous bremsstrahlung gamma-ray beam at the Saskatchewan Accelerator Laboratory. Coincident proton pairs emitted on opposite sides of the beam were detected using four sets of plastic scintillator telescopes arranged symmetrically about the beam at 81^ circ and 91^circ. Differential cross sections were extracted, as a function of the undetected neutron momentum, from kinematic regions where three-body forces effects are expected to be maximized and two-body mechanisms suppressed. These measured cross sections show an enhancement over calculations using one-body and two -body photo-absorption mechanisms only. The inclusion of the two-pion-exchange three-body absorption mechanism is needed to adequately describe the data. This constitutes direct evidence for the existence of three-body forces in ^3He, since the two-pion-exchange mechanism is directly related to three-body forces through gauge invariance. Cross sections differential only in the solid angles of the two detected protons were also measured as a function of incident gamma-ray energy. The angular and energy dependence of these cross sections were compared to those expected from 3N phase-space considerations alone. The measured angular dependence is indicative of a non-phase -space distribution, with an enhancement in the collinear geometry. The measured energy distribution followed the general trend of phase-space predictions, but show a departure from phase-space in the 150-200 MeV energy range.
Extraction of $\\gamma$ from three-body B decays
Bhattacharya, Bhubanjyoti; London, David
2012-01-01
The conventional use of two-body B decays to extract $\\gamma$, although theoretically clean, is currently statistics-limited. On the other hand, a bulk of data on three-body B decays is available from $B$ factories. Applying the flavor-SU(3)-symmetric approach proposed in Ref.\\ \\cite{ReyLeLorier:2011ww} to \\babar data, we find the highly promising result $\\gamma = (81^{+4}_{-5} ({\\rm avg.}) \\pm 5 ({\\rm std.\\ dev.}))^\\circ$. This establishes the use of three-body B decays as a viable alternative for the extraction of weak phases. In this preliminary analysis we have neglected several sources of uncertainties such as the effect of flavor-SU(3) breaking due to meson masses, and error correlations between input experimental parameters. A better understanding of these will improve the viability of this method.
Tensor forces in the three-body problem
International Nuclear Information System (INIS)
The three-body problem is considered using separable two-body interactions. The two-body potentials used contain both attraction and repulsion each of the attractive and repulsive parts of the two-body potentials also include tensor forces. The effect of the tensor forces is investigated by making use of the separable approximation. By introducing the separable expansion in the three-body problem, the Faddev equations are reduced to a well-behaved set of coupled integral equations. The integral equations obtained are solved numerically using separable two-body interactions with potential functions of the Yamaguchj, Gaussian, Tabakin, Mongan and Reid forms. The calculated values of the binding energies for the nuclei 3H, 3He and 6Li are in good agreement with the experimental values. The effect of the tensor forces is found to improve the binding energy by about 4,491%-8,327%
Continuum capture in the three-body problem
International Nuclear Information System (INIS)
The three-body problem, especially the problem of electron capture to the continuum in heavy particle collisions is reviewed. Major topics covered include: second born-induced asymmetry in electron capture to the continuum; historical context, links to other tests of atomic scattering theory; experiments characterizing the velocity distribution of ECC electrons; other atomic physics tests of high velocity Born expansions; atom capture; capture by positrons; and pion capture to the continuum
Oscillatory orbits in the restricted elliptic planar three body problem
Guardia, Marcel; Mart\\'\\in, Pau; Sabbagh, Lara; Seara, Tere M.
2015-01-01
The restricted planar elliptic three body problem models the motion of a massless body under the Newtonian gravitational force of the two other bodies, the primaries, which evolve in Keplerian ellipses. A trajectory is called oscillatory if it leaves every bounded region but returns infinitely often to some fixed bounded region. We prove the existence of such type of trajectories for any values for the masses of the primaries provided they make almost circular orbits.
Sultanov, Renat A.; Guster, Dennis
2013-08-01
A few-body type computation is performed for a three-charge-particle collision with participation of a slow antiproton and a muonic muonium atom (true muonium), i.e. a bound state of two muons in its ground state. The total cross section of the following reaction , where muonic anti-hydrogen is a bound state of an antiproton and positive muon, is computed in the framework of a set of coupled two-component Faddeev-Hahn-type equation. A better known negative muon transfer low energy three-body reaction: is also computed as a test system. Here, t+ is triton and d+ is deuterium.
Study of Three-Body Y(10860) Decays
Adachi, I; Aihara, H; Arinstein, K; Arita, Y; Asner, D M; Aso, T; Aulchenko, V; Aushev, T; Aziz, T; Bakich, A M; Ban, Y; Barberio, E; Barrett, M; Bay, A; Bedny, I; Belhorn, M; Belous, K; Bhardwaj, V; Bhuyan, B; Bischofberger, M; Blyth, S; Bondar, A; Bonvicini, G; Bozek, A; Bra\\v, M; Brodzicka, J; Brovchenko, O; Browder, T E; Chang, M -C; Chang, P; Chao, Y; Chekelian, V; Chen, A; Chen, K -F; Chen, P; Cheon, B G; Chilikin, K; Chistov, R; Cho, I -S; Cho, K; Choi, K -S; Choi, S -K; Choi, Y; Crnkovic, J; Dalseno, J; Danilov, M; Dingfelder, J; Dole\\v, Z; Drásal, Z; Drutskoy, A; Dungel, W; Dutta, D; Eidelman, S; Epifanov, D; Esen, S; Fast, J E; Feindt, M; Frey, A; Fujikawa, M; Gaur, V; Gabyshev, N; Garmash, A; Goh, Y M; Golob, B; GrossePerdekamp, M; Guo, H; Haba, J; Hamer, P; Han, Y L; Hara, K; Hara, T; Hasegawa, Y; Hayasaka, K; Hayashii, H; Heffernan, D; Higuchi, T; Horii, Y; Hoshi, Y; Hoshina, K; Hou, W -S; Hsiung, Y B; Hyun, H J; Igarashi, Y; Iijima, T; Imamura, M; Inami, K; Ishikawa, A; Itoh, R; Iwabuchi, M; Iwasaki, M; Iwasaki, Y; Iwashita, T; Iwata, S; Jaegle, I; Jones, M; Julius, T; Kah, D H; Kakuno, H; Kang, J H; Kapusta, P; Kataoka, S U; Katayama, N; Kawai, H; Kawasaki, T; Kichimi, H; Kiesling, C; Kim, B H; Kim, H J; Kim, H O; Kim, J B; Kim, J H; Kim, K T; Kim, M J; Kim, S K; Kim, Y J; Kinoshita, K; Klucar, J; Ko, B R; Kobayashi, N; Koblitz, S; Kody\\v, P; Koga, Y; Korpar, S; Kouzes, R T; Kreps, M; Kri\\v, P; Krokovny, P; Kronenbitter, B; Kuhr, T; Kumar, R; Kumita, T; Kurihara, E; Kuroki, Y; Kuzmin, A; Kvasni\\v, P; Kwon, Y -J; Kyeong, S -H; Lange, J S; Lee, M J; Lee, S -H; Leitgab, M; Leitner, R; Li, J; Li, X; Li, Y; Libby, J; Lim, C -L; Limosani, A; Liu, C; Liu, Y; Liu, Z Q; Liventsev, D; Louvot, R; MacNaughton, J; Marlow, D; Matvienko, D; Matyja, A; McOnie, S; Mikami, Y; Miyabayashi, K; Miyachi, Y; Miyata, H; Miyazaki, Y; Mizuk, R; Mohanty, G B; Mohapatra, D; Moll, A; Mori, T; Müller, T; Muramatsu, N; Mussa, R; Nagamine, T; Nagasaka, Y; Nakahama, Y; Nakamura, I; Nakano, E; Nakano, T; Nakao, M; Nakayama, H; Nakazawa, H; Natkaniec, Z; Nayak, M; Nedelkovska, E; Negishi, K; Neichi, K; Neubauer, S; Ng, C; Niiyama, M; Nishida, S; Nishimura, K; Nitoh, O; Nozaki, T; Ogawa, A; Ogawa, S; Ohshima, T; Okuno, S; Olsen, S L; Onuki, Y; Ostrowicz, W; Ozaki, H; Pakhlov, P; Pakhlova, G; Palka, H; Panzenböck, E; Park, C W; Park, H; Park, H K; Park, K S; Peak, L S; Pedlar, T K; Peng, T; Pestotnik, R; Peters, M; Petri\\v, M; Piilonen, L E; Poluektov, A; Prim, M; Prothmann, K; Reisert, B; Ritter, M; Röhrken, M; Rorie, J; Rozanska, M; Ryu, S; Sahoo, H; Sakai, K; Sakai, Y; Sandilya, S; Santel, D; Santelj, L; Sanuki, T; Sasao, N; Sato, Y; Schneider, O; Schnell, G; Schönmeier, P; Schwanda, C; Schwartz, A J; Schwenker, B; Seidl, R; Sekiya, A; Senyo, K; Seon, O; Sevior, M E; Shang, L; Shapkin, M; Shebalin, V; Shen, C P; Shibata, T -A; Shibuya, H; Shinomiya, S; Shiu, J -G; Shwartz, B; Sibidanov, A; Simon, F; Singh, J B; Sinha, R; Smerkol, P; Sohn, Y -S; Sokolov, A; Solovieva, E; Stani\\v, S; Stari\\v, M; Stypula, J; Sugihara, S; Sugiyama, A; Sumihama, M; Sumisawa, K; Sumiyoshi, T; Suzuki, K; Suzuki, S; Suzuki, S Y; Takeichi, H; Tamponi, U; Tanaka, M; Tanaka, S; Tanida, K; Taniguchi, N; Tatishvili, G; Taylor, G N; Teramoto, Y; Thorne, F; Tikhomirov, I; Trabelsi, K; Tse, Y F; Tsuboyama, T; Uchida, M; Uchida, T; Uchida, Y; Uehara, S; Ueno, K; Uglov, T; Unno, Y; Uno, S; Urquijo, P; Ushiroda, Y; Usov, Y; Vahsen, S E; Vanhoefer, P; VanHulse, C; Varner, G; Varvell, K E; Vervink, K; Vinokurova, A; Vorobyev, V; Vossen, A; Wang, C H; Wang, J; Wang, M -Z; Wang, P; Wang, X L; Watanabe, M; Watanabe, Y; Wedd, R; White, E; Wicht, J; Widhalm, L; Wiechczynski, J; Williams, K M; Won, E; Yabsley, B D; Yamamoto, H; Yamaoka, J; Yamashita, Y; Yamauchi, M; Yuan, C Z; Yusa, Y; Zander, D; Zhang, C C; Zhang, L M; Zhang, Z P; Zhao, L; Zhilich, V; Zhou, P; Zhulanov, V; Zivko, T; Zupanc, A; Zwahlen, N; Zyukova, O
2012-01-01
We report preliminary results on the analysis of the three-body Y(10860)=> B barB pi, Y(10860) => (B barB* + c.c.) pi and Y(10860)=> B* barB* pi decays including an observation of the Y(10860)=> Zb(10610)+- pi-+ => [B barB*+c.c]+- pi-+ and Y(10860)=> Zb(10650)+- pi-+ => [B* barB*]+- pi-+ decays as intermediate channels. We measure branching fractions of the three-body decays to be Br(Y(10860)=> [B barB*+c.c.]+- pi-+)=(28.3+-2.9+-4.6)x10^{-3} and Br(Y(10860)=> [B* barB*]+- pi-+)=(14.1+-1.9+-2.4)x10^{-3} and set 90% C.L. upper limit Br(Y(10860)=> [B barB]+- pi-+)Y(nS)pi+pi-, n=1,2,3 decays and the analysis of the internal structure of the three-body Y(10860)=>hb(mP)pi+pi-, m=1,2 decays. The results are based on a 121.4 1/fb data sample collected with the Belle detector at a center-of-mass energy near the Y(10860).
Dmitrašinović, V
2015-01-01
We present results of numerical calculations showing a three-body orbit's period's $T$ dependence on its topology. This dependence is a simple linear one, when expressed in terms of appropriate variables, suggesting an exact mathematical law. This is the first known relation between topological and kinematical properties of three-body systems. We have used these results to predict the periods of several sets of as yet undiscovered orbits, but the relation also indicates that the number of periodic three-body orbits with periods shorter than any finite number is countable.
Three-body bound states and the development of odd-frequency pairing
International Nuclear Information System (INIS)
We link the formation of an odd-frequency paired state to the development of an anomalous three-body scattering amplitude. We show how a simple ansatz leads to a simple realization of odd-frequency superconductivity in a mean-field model of the Kondo lattice. The gapless quasiparticles of this state are equal mixtures of particle and hole at zero frequency and their spin and charge coherence factors vanish, unlike conventional even-paired BCS quasiparticles. We discuss the difficulties this and other models face in attempting to explain experiments in heavy-fermion superconductors. (orig.)
Automated control system in charged particle accelerators
International Nuclear Information System (INIS)
A general approach to the design of automated radiation safety systems at charged particle accelerators is described. Parameters of high-energy electron accelerators of the Kharkov Physics and Engineering Institute are presented. Characteristics of the surrounding radiation fields are given. Ionizing radiation transducers which can be used in automated systems are considered. Local radiation monitoring station based on the LUE-2000 accelerator of the institute is described. 9 refs.; 4 figs.; 1 tab
Simulating charge transport in flexible systems
Directory of Open Access Journals (Sweden)
Timothy Clark
2015-12-01
Full Text Available Systems in which movements occur on two significantly different time domains, such as organic electronic components with flexible molecules, require different simulation techniques for the two time scales. In the case of molecular electronics, charge transport is complicated by the several different mechanisms (and theoretical models that apply in different cases. We cannot yet combine time scales of molecular and electronic movement in simulations of real systems. This review describes our progress towards this goal.
Simulating charge transport in flexible systems
Timothy Clark
2015-01-01
Systems in which movements occur on two significantly different time domains, such as organic electronic components with flexible molecules, require different simulation techniques for the two time scales. In the case of molecular electronics, charge transport is complicated by the several different mechanisms (and theoretical models) that apply in different cases. We cannot yet combine time scales of molecular and electronic movement in simulations of real systems. This review describes our ...
Photofragment translational spectroscopy of three body dissociations and free radicals
Energy Technology Data Exchange (ETDEWEB)
North, S.W.
1995-04-01
This dissertation describes several three-body dissociations and the photodissociation of methyl radicals studied using photofragment translational spectroscopy. The first chapter provides an introduction to three body dissociation, examines current experimental methodology, and includes a discussion on the treatment of photofragment translational spectroscopy data arising from three-body fragmentation. The ultraviolet photodissociation of azomethane into two methyl radicals and nitrogen is discussed in chapter 2. Chapter 3 describes the photodissociation of acetone at 248 nm and 193 nm. At 248 nm the translational energy release from the initial C-C bond cleavage matches the exit barrier height and a comparison with results at 266 nm suggests that
LHCb: Can LHCb Study Three Body Decays with Neutrals?
Fawcett, W
2013-01-01
In this poster we present the first attempt to use a new method to measure CP violation in Dalitz plots. This method is unbinned, model independent and has a greater sensitivity than binned methods. Preliminary studies have been made using the three body decays $D^0 \\rightarrow K_\\rm{S}^0 \\pi^+ \\pi^-$ and $D^0 \\rightarrow \\pi^+ \\pi^- \\pi^0$, which is especially challenging since there is one neutral particle in each of the final states. An attempt to visualise where CP violation occurs in Dalitz plots is also presented.
Three-body bound states in finite volume with EFT
International Nuclear Information System (INIS)
Three particles with large scattering length display a universal spectrum of three-body bound states called ''Efimov trimers''. We calculate the modification of the Efimov trimers of three identical bosons in a finite cubic box and compute the dependence of their energies on the box size using effective field theory. The renormalization of the effective field theory in the finite volume is explicitly verified. We investigate the effects of partial wave mixing and study the behavior of shallow trimers near the dimer energy. Finally, we present first results for the triton in a finite volume.
Three-body 3He photodisintegration in the Δ region
International Nuclear Information System (INIS)
Three-body 3He photodisintegration was measured in the photon energy range (Eγ) of 145--425 MeV. The total cross section for photon absorption on the np pairs in 3He, σ(3He(γ,np)psp), where psp is a spectator proton, is reported here for the first time. The Eγ dependence of the σ is found to scale to that of σ(2H(γ,np)), and the ratio is determined to be σ(3He(γ,np)psp)/σ(2H(γ,np))=1.24±0.,26
SLAC three-body partial wave analysis system
Energy Technology Data Exchange (ETDEWEB)
Aston, D.; Lasinski, T.A.; Sinervo, P.K.
1985-10-01
We present a heuristic description of the SLAC-LBL three-meson partial wave model, and describe how we have implemented it at SLAC. The discussion details the assumptions of the model and the analysis, and emphasizes the methods we have used to prepare and fit the data. 28 refs., 12 figs., 1 tab.
On the Appearance of Families of Efimov States in the Spinor Three-Body Problem
Colussi, V. E.; Greene, Chris H.; D`Incao, J. P.
2016-03-01
Few-body systems with access to multiple internal levels exhibit richness beyond that typically found in their single-level counterparts. One example is that of Efimov states in strongly-correlated spinor three-body systems. In [V. E. Colussi, C. H. Greene, and J. P. D'Incao, Phys. Rev. Lett. 113, 045302 (2014)] this problem was analyzed for spinor condensates finding a complex level structure as in an early work [Bulgac and Efimov, Sov. J. Nucl. Phys. 22, 153 (1976)] in nuclear physics, and the impact of Efimov physics on the general form of the scattering observables was worked out. In this paper we discuss the appearance of novel families of Efimov states in the spinor three-body problem.
Casal, J.; Rodríguez-Gallardo, M.; Arias, J. M.; Gómez-Camacho, J.
2016-04-01
A relationship between the Coulomb inclusive break-up probability and the radiative capture reaction rate for weakly bound three-body systems is established. This direct link provides a robust procedure to estimate the reaction rate for nuclei of astrophysical interest by measuring inclusive break-up processes at different energies and angles. This might be an advantageous alternative to the determination of reaction rates from the measurement of B (E 1 ) distributions through exclusive Coulomb break-up experiments. In addition, it provides a reference to assess the validity of different theoretical approaches that have been used to calculate reaction rates. The procedure is applied to 11Li (9Li+n +n ) and 6He (4He+n +n ) three-body systems for which some data exist.
Casal, J; Arias, J M; Gómez-Camacho, J
2016-01-01
A relationship between the Coulomb inclusive break-up probability and the radiative capture reaction rate for weakly-bound three-body systems is established. This direct link provides a robust procedure to estimate the reaction rate for nuclei of astrophysical interest by measuring inclusive break-up processes at different energies and angles. This might be an advantageous alternative to the determination of reaction rates from the measurement of $B(E1)$ distributions through exclusive Coulomb break-up experiments. In addition, it provides a reference to assess the validity of different theoretical approaches that have been used to calculate reaction rates. The procedure is applied to $^{11}$Li ($^{9}$Li+n+n) and $^6$He ($^{4}$He+n+n) three-body systems for which some data exist.
Casimir-Polder repulsion: Three-body effects
Milton, Kimball A; Parashar, Prachi; Pourtolami, Nima; Brevik, Iver; Ellingsen, Simen A; Buhmann, Stefan Yoshi; Scheel, Stefan
2015-01-01
In this paper we study an archetypical scenario in which repulsive Casimir-Polder forces between an atom or molecule and two macroscopic bodies can be achieved. This is an extension of previous studies of the interaction between a polarizable atom and a wedge, in which repulsion occurs if the atom is sufficiently anisotropic and close enough to the symmetry plane of the wedge. A similar repulsion occurs if such an atom passes a thin cylinder or a wire. An obvious extension is to compute the interaction between such an atom and two facing wedges, which includes as a special case the interaction of an atom with a conducting screen possessing a slit, or between two parallel wires. To this end we further extend the electromagnetic multiple-scattering formalism for three-body interactions. To test this machinery we reinvestigate the interaction of a polarizable atom between two parallel conducting plates. In that case, three-body effects are shown to be small, and are dominated by three- and four-scattering terms....
Effects of Varying the Three-Body Molecular Hydrogen
Energy Technology Data Exchange (ETDEWEB)
Turk, Matthew J.; /San Diego, CASS; Clark, Paul; Glover, S.C.O.; /ZAH, Heidelberg; Greif, T.H.; /Garching, Max Planck Inst. Plasmaphys.; Abel, Tom; Klessen, Ralf; /KIPAC, Menlo Park /ZAH, Heidelberg /KIPAC, Menlo Park; Bromm, Volker; /Texas U., Astron. Dept.
2011-03-03
The transformation of atomic hydrogen to molecular hydrogen through three-body reactions is a crucial stage in the collapse of primordial, metal-free halos, where the first generation of stars (Population III stars) in the Universe are formed. However, in the published literature, the rate coefficient for this reaction is uncertain by nearly an order of magnitude. We report on the results of both adaptive mesh refinement (AMR) and smoothed particle hydrodynamics (SPH) simulations of the collapse of metal-free halos as a function of the value of this rate coefficient. For each simulation method, we have simulated a single halo three times, using three different values of the rate coefficient. We find that while variation between halo realizations may be greater than that caused by the three-body rate coefficient being used, both the accretion physics onto Population III protostars as well as the long-term stability of the disk and any potential fragmentation may depend strongly on this rate coefficient.
Flow equation of functional renormalization group for three-body scattering problems
Tanizaki, Yuya
2013-11-01
Functional renormalization group (FRG) is applied to the three-body scattering problem in the two-component fermionic system with an attractive contact interaction. We establish an exact flow equation on the basis of FRG and show that our flow equation is consistent with integral equations obtained from the Dyson-Schwinger equation. In particular, the relation of our flow equation and the Skornyakov and Ter-Martirosyan equation for the atom-dimer scattering is made clear.
Flow equation of functional renormalization group for three-body scattering problems
Tanizaki, Yuya
2013-01-01
Functional renormalization group (FRG) is applied to the three-body scattering problem in the two-component fermionic system with an attractive contact interaction. We establish a new and correct flow equation on the basis of FRG and show that our flow equation is consistent with integral equations obtained from the Dyson-Schwinger equation. In particular, the relation of our flow equation and the Skornyakov and Ter-Martirosyan equation for the atom-dimer scattering is made clear.
Density functional theory of charged colloidal systems
International Nuclear Information System (INIS)
The phase behavior of charged colloidal systems has been studied recently by the density functional theory formalism (DFT) [R. van Roij, M. Dijkstra, and J. P. Hansen, Phys. Rev. E >59, 2010 (1999)]. A key feature of this approach is the appearance of a density and temperature-dependent effective Hamiltonian between the charged colloids. Under certain approximations, the effective Hamiltonian is made up only of a sum of position-independent one-body or volume terms and two-body colloid-separation dependent terms. In the limit of low colloidal densities, the DFT results do not reduce to the familiar Debye-Huckel limiting law nor do the results agree with previous work based on an identical approach but were developed using traditional statistical-mechanical methods [B. Beresford-Smith, D. Y. C. Chan, and D. J. Mitchell J. Colloid Interface Sci. >105, 216 (1985)]. This paper provides a reconciliation of these differences and comments on the significance of the one-body volume terms in the effective Hamiltonian of a system of charged colloids in determining thermodynamics and phase behavior
PV Charging System for Remote Area Operations
Energy Technology Data Exchange (ETDEWEB)
Ilsemann, Frederick; Thompson, Roger
2008-07-31
The objective of this project is to provide the public with a study of new as well existing technology to recharge batteries used in the field. A new product(s) will also be built based upon the information ascertained. American Electric Vehicles, Inc. (AEV) developed systems and methods suitable for charging state-of-the-art lithium-ion batteries in remote locations under both ideal and cloudy weather conditions. Conceptual designs are described for existing and next generation technology, particularly as regards solar cells, peak power trackers and batteries. Prototype system tests are reported.
Three-body bound states of two bosonic impurities immersed in a Fermi sea in 2D
Bellotti, F. F.; Frederico, T.; Yamashita, M. T.; Fedorov, D. V.; Jensen, A. S.; Zinner, N. T.
2016-04-01
We consider two identical impurities immersed in a Fermi sea for a broad range of masses and for both interacting and non-interacting impurities. The interaction between the particles is described through attractive zero-range potentials and the problem is solved in momentum space. The two impurities can attach to a fermion from the sea and form three-body bound states. The energy of these states increase as function of the Fermi momentum k F, leading to three-body bound states below the Fermi energy. The fate of the states depends highly on two- and three-body thresholds and we find evidence of medium-induced Borromean-like states in 2D. The corrections due to particle-hole fluctuations in the Fermi sea are considered in the three-body calculations and we show that in spite of the fact that they strongly affect both the two- and three-body systems, the correction to the point at which the three-body states cease to exist is small.
Nuclear structure with unitarily transformed two-body plus phenomenological three-body interactions
International Nuclear Information System (INIS)
The importance of three-nucleon forces for a variety of nuclear structure phenomena is apparent in various investigations. This thesis provides a first step towards the inclusion of realistic three-nucleon forces by studying simple phenomenological threebody interactions. The Unitary Correlation Operator Method (UCOM) and the Similarity Renormalization Group (SRG) provide two different approaches to derive soft phase-shift equivalent nucleon-nucleon (NN) interactions via unitary transformations. Although their motivations are quite different the NN interactions obtained with the two methods exhibit some similarities. The application of the UCOM- or SRG-transformed Argonne V18 potential in the Hartree-Fock (HF) approximation and including the second-order energy corrections emerging from many-body perturbation theory (MBPT) reveals that the systematics of experimental ground-state energies can be reproduced by some of the interactions considering a series of closed-shell nuclei across the whole nuclear chart. However, charge radii are systematically underestimated, especially for intermediate and heavy nuclei. This discrepancy to experimental data is expected to result from neglected three-nucleon interactions. As first ansatz for a three-nucleon force, we consider a finite-range three-body interaction of Gaussian shape. Its influence on ground-state energies and charge radii is discussed in detail on the basis of HF plus MBPT calculations and shows a significant improvement in the description of experimental data. As the handling of the Gaussian three-body interaction is time-extensive, we show that it can be replaced by a regularized three-body contact interaction exhibiting a very similar behavior. An extensive study characterizes its properties in detail and confirms the improvements with respect to nuclear properties. To take into account information of an exact numerical solution of the nuclear eigenvalue problem, the No-Core Shell Model is applied to
Nuclear structure with unitarily transformed two-body plus phenomenological three-body interactions
Energy Technology Data Exchange (ETDEWEB)
Guenther, Anneke
2011-02-02
The importance of three-nucleon forces for a variety of nuclear structure phenomena is apparent in various investigations. This thesis provides a first step towards the inclusion of realistic three-nucleon forces by studying simple phenomenological threebody interactions. The Unitary Correlation Operator Method (UCOM) and the Similarity Renormalization Group (SRG) provide two different approaches to derive soft phase-shift equivalent nucleon-nucleon (NN) interactions via unitary transformations. Although their motivations are quite different the NN interactions obtained with the two methods exhibit some similarities. The application of the UCOM- or SRG-transformed Argonne V18 potential in the Hartree-Fock (HF) approximation and including the second-order energy corrections emerging from many-body perturbation theory (MBPT) reveals that the systematics of experimental ground-state energies can be reproduced by some of the interactions considering a series of closed-shell nuclei across the whole nuclear chart. However, charge radii are systematically underestimated, especially for intermediate and heavy nuclei. This discrepancy to experimental data is expected to result from neglected three-nucleon interactions. As first ansatz for a three-nucleon force, we consider a finite-range three-body interaction of Gaussian shape. Its influence on ground-state energies and charge radii is discussed in detail on the basis of HF plus MBPT calculations and shows a significant improvement in the description of experimental data. As the handling of the Gaussian three-body interaction is time-extensive, we show that it can be replaced by a regularized three-body contact interaction exhibiting a very similar behavior. An extensive study characterizes its properties in detail and confirms the improvements with respect to nuclear properties. To take into account information of an exact numerical solution of the nuclear eigenvalue problem, the No-Core Shell Model is applied to
JSPAM: A restricted three-body code for simulating interacting galaxies
Wallin, John; Harvey, Allen
2015-01-01
Restricted three-body codes have a proven ability to recreate much of the disturbed morphology of actual interacting galaxies. As more sophisticated n-body models were developed and computer speed increased, restricted three-body codes fell out of favor. However, their supporting role for performing wide searches of parameter space when fitting orbits to real systems demonstrates a continuing need for their use. Here we present the model and algorithm used in the JSPAM code. A precursor of this code was originally described in 1990, and was called SPAM. We have recently updated the software with an alternate potential and a treatment of dynamical friction to more closely mimic the results from n-body tree codes. The code is released publicly for use under the terms of the Academic Free License (AFL) v.3.0 and has been added to the Astrophysics Source Code Library.
Critical points of the Bose–Hubbard model with three-body local interaction
Energy Technology Data Exchange (ETDEWEB)
Avila, C.A.; Franco, R. [Departamento de Física, Universidad Nacional de Colombia, A.A. 5997, Bogotá (Colombia); Souza, A.M.C. [Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristovão, SE (Brazil); Figueira, M.S. [Instituto de Física, Universidade Federal Fluminense, Av. Litorânea s/n, 24210-346 Niterói, Rio de Janeiro (Brazil); Silva-Valencia, J., E-mail: jsilvav@unal.edu.co [Departamento de Física, Universidad Nacional de Colombia, A.A. 5997, Bogotá (Colombia)
2014-09-12
Using the density matrix renormalization group method, we study a one-dimensional system of bosons that interact with a local three-body term. We calculate the phase diagram for higher densities, where the Mott insulator lobes are surrounded by the superfluid phase. We also show that the Mott insulator lobes always grow as a function of the density. The critical points of the Kosterlitz–Thouless transitions were determined through the von Neumann block entropy, and its dependence on the density is given by a power law with a negative exponent. - Highlights: • We studied the Bose–Hubbard model with a local three-body interaction term. • We show that the Mott insulator lobes always grow as a function of the density. • We found a power law dependence of the critical point position with the density.
JSPAM: A restricted three-body code for simulating interacting galaxies
Wallin, J. F.; Holincheck, A. J.; Harvey, A.
2016-07-01
Restricted three-body codes have a proven ability to recreate much of the disturbed morphology of actual interacting galaxies. As more sophisticated n-body models were developed and computer speed increased, restricted three-body codes fell out of favor. However, their supporting role for performing wide searches of parameter space when fitting orbits to real systems demonstrates a continuing need for their use. Here we present the model and algorithm used in the JSPAM code. A precursor of this code was originally described in 1990, and was called SPAM. We have recently updated the software with an alternate potential and a treatment of dynamical friction to more closely mimic the results from n-body tree codes. The code is released publicly for use under the terms of the Academic Free License ("AFL") v. 3.0 and has been added to the Astrophysics Source Code Library.
Critical points of the Bose–Hubbard model with three-body local interaction
International Nuclear Information System (INIS)
Using the density matrix renormalization group method, we study a one-dimensional system of bosons that interact with a local three-body term. We calculate the phase diagram for higher densities, where the Mott insulator lobes are surrounded by the superfluid phase. We also show that the Mott insulator lobes always grow as a function of the density. The critical points of the Kosterlitz–Thouless transitions were determined through the von Neumann block entropy, and its dependence on the density is given by a power law with a negative exponent. - Highlights: • We studied the Bose–Hubbard model with a local three-body interaction term. • We show that the Mott insulator lobes always grow as a function of the density. • We found a power law dependence of the critical point position with the density
Green's function method for strength function in three-body continuum
Suzuki, Y; Baye, D
2009-01-01
Practical methods to compute dipole strengths for a three-body system by using a discretized continuum are analyzed. New techniques involving Green's function are developed, either by correcting the tail of the approximate wave function in a direct calculation of the strength function or by using a solution of a driven Schroedinger equation in a summed expression of the strength. They are compared with the complex scaling method and the Lorentz integral transform, also making use of a discretized continuum. Numerical tests are performed with a hyperscalar three-body potential in the hyperspherical-harmonics formalism. They show that the Lorentz integral transform method is less practical than the other methods because of a difficult inverse transform. These other methods provide in general comparable accuracies.
Cleaning Dirty Surfaces: A Three-Body Problem.
Stoehr, Bastian; Hall, Colin; Evans, Drew; Murphy, Peter
2016-07-20
Human interaction with touch screens requires physical touch and hence results in contamination of these surfaces, resulting in the necessity of cleaning. In this study we discuss the three bodies of this problem and how each component contributes and can be controlled. Utilizing a standard fingerprint machine and a standard cleanability test, this study examines the influence of parameters such as the wiping speed and pressure, the material and surface area of the cloths, and the surface energy of the contaminated surfaces. It was shown that fingerprint contamination undergoes shear banding and hence is not easily removed. The degree of material removal depends on the position of the shear plane, which is influenced by surface energies and shear rates. PMID:27351355
Soft dipole mode in ^{11}Li and three body continuum
Lurie, Yu A; Smirnov, Yu F
1994-01-01
Properties of the neutron rich ^{11}Li nucleus are calculated in the framework of the cluster model ^{9}Li +n+n. The formalism of the harmonic oscillator representation of the scattering theory is used for the description of bound and continuum spectrum states in the three-body-democratic-decay approximation. It is shown that this approach allows one to take into account adequately the long asymptotic tail of the ^{11}Li wave function ({\\em neutron halo}) and to reproduce correctly the binding energy, radius and ^{11}Li electromagnetic dissociation cross-section on target nuclei. The shape and the energy position of the B(E1) peak corresponding to the soft dipole mode are also in agreement with experiment.
Unitary three-body calculation of nucleon-nucleon scattering
International Nuclear Information System (INIS)
We calculate nucleon-nucleon elastic scattering phase parameters based on a unitary, relativistic, pion-exchange model. The results are highly dependent on the off-shell amplitudes of πN scattering. The isobar-dominated model for the P33 interaction leads to too small pion production rates owing to its strong suppression of off-shell pions. We propose to expand the idea of the Δ-isobar model in such a manner as to incorporate a background (non-pole) interaction. The two-potential model, which was first applied to the P11 partial wave by Mizutani and Koltun, is applied also to the P33 wave. Our phenomenological model for πN interaction in the P33 partial wave differs from the conventional model only in its off-shell extrapolation, and has two different variants for the πN → Δ vertex. The three-body approach of Kloet and Silbar is extended such that the background interactions can be included straightfowardly. We make detailed comparisons of the new model with the conventional one and find that our model adequately reproduces the 1D2 phase parameters as well as those of peripheral partial waves. We also find that the longitudinal total cross section difference ΔσL(pp → NNπ) comes closer to the data compared to Kloet and Silbar. We discuss about the backward pion propagation in the three-body calculation, and the Pauli-principle violating states for the background P11 interaction. (author)
Three-body processes in the presence of Coulomb forces
International Nuclear Information System (INIS)
Rigorous definitions are provided for the scattering amplitudes describing elastic, inelastic and rearrangement reactions of one charged particle and a bound state of two other charged bodies, and of break-up amplitudes with one neutral and two charged particles. The resulting expressions confirm, and give precise meaning to, what is intuitively anticipated in conventional approaches. Furthermore, integral equations for these transition amplitudes are available which render feasible practical calculations of Coulomb corrections in three-particle reactions. 2 references
Exact solution of the restricted three-body Santilli-Shillady model of $H_{2}$ molecule
Aringazin, A K
2000-01-01
In this paper, we study the exact solution of the restricted isochemical model of $H_2$ molecule with fixed nuclei recently proposed by Santilli and Shillady in which the two electrons are assumed to be bonded/correlated into a quasiparticle called the {\\it isoelectronium}. Under the conditions that: 1) the isoelectronium is stable; 2) the effective size of the isoelectronium is ignorable, in comparison to internuclear distance; and 3) the two nuclei are at rest, the Santilli-Shillady model of the $H_2$ molecule is reduced to a restricted {\\it three-body} system essentially similar to a neutral version of the $H_2^+$ ion, which, as such, admits exact solution. Our main result is that the restricted three-body Santilli-Shillady approach to $H_2$ is capable to fit the experimental binding energy, at the isoelectronium mass parameter $M=0.308381m_e$, although under optimal internuclear distance about 19.6% bigger than the conventional experimental value, indicating an approximate character of the three-body mode...
Three-body force for baryons from the D0-D4/D8 matrix model
Li, Si-wen
2016-01-01
This is an extensive work to our previous paper \\cite{key-08} studied on the D0-D4/D8 holographic system. We compute the three-body force for baryons with the D0-D4/D8 matrix model derived in \\cite{key-08} with considering the non-zero QCD vacuum. We obtain the three-body force at short distances but modified by the appearance of the smeared D0-branes i.e. considering the effects from the non-trivial QCD vacuum. We firstly test our matrix model in the case of 't Hooft instanton and then in two more realistic case: (1) three-neutrons with averaged spins and (2) proton-proton-neutron (or proton-neutron-proton). The three-body potential vanishes in the former case while in two latter cases it is positive i.e. repulsive and makes sense only if the constraint for stable baryonic state is satisfied. We require all the baryons in our computation aligned on a line. These may indicate that the cases in dense states of neutrons such as in neutron stars, Helium-3 or Tritium nucleus all with the non-trivial QCD vacuum.
Quantum simulation of a three-body interaction Hamiltonian on an NMR quantum computer
Tseng, C H; Sharf, Y; Knill, E H; Laflamme, R; Havel, T F; Cory, D G
2000-01-01
Extensions of average Hamiltonian theory to quantum computation permit the design of arbitrary Hamiltonians, allowing rotations throughout a large Hilbert space. In this way, the kinematics and dynamics of any quantum system may be simulated by a quantum computer. A basis mapping between the systems dictates the average Hamiltonian in the quantum computer needed to implement the desired Hamiltonian in the simulated system. The flexibility of the procedure is illustrated with NMR on 13-C labelled Alanine by creating the non-physical Hamiltonian ZZZ corresponding to a three body interaction.
Microscopic nuclear equation of state with three-body forces and neutron star structure
International Nuclear Information System (INIS)
The equation of state (EOS) of nuclear matter is discussed within the Brueckner-Bethe-Goldstone approach. First the energy per particle E/A is calculated in the Brueckner-Hartree-Fock limit with the Argonne v18 potential, using the continuous choice as auxiliary potential. Then, the contribution of three-body clusters is determined by solving the Bethe-Faddeev equation, and the equivalence with the same calculations based on the standard choice as auxiliary potential, is demonstrated. In spite of reaching a quite good convergence of the hole-line expansion, the resulting EOS does not fit the empirical saturation density (ρ0 = 0.17 fm-3). To this end, three-body forces (TBF) are introduced. A first class of microscopic TBF comprises effects due to NN-bar virtual excitations via σ and ω-meson exchanges (the main relativistic correction to Brueckner theory), the 2π-exchange, and the virtual excitation of the lowest nucleonic resonance N*(1440). We compare with a phenomenological TBF, involving two parameters adjusted on the saturation density and energy. Next, using microscopic or phenomenological TBF, the symmetry energy of nuclear matter is computed, allowing to determine the EOS of beta-stable and charge neutral matter, and the properties of neutron stars, in particular the mass-radius curve
Indian Academy of Sciences (India)
S Mahapatra; J Nag; D P Sural; S N Mukherjee
2001-10-01
We show how to treat the dynamics of an asymmetric three-body system consisting of one heavy and two identical light particles in a simple coordinate space variational approach. The method is constructive and gives an efﬁcient way of resolving a three-body system to an effective two-body system. It is illustrated by explaining the structural properties of some nuclei of current interest, namely halo nuclei and double- hypernuclei. The ansatz used here may be of value in a number of three particle problems of similar nature.
Integrated exhaust gas recirculation and charge cooling system
Energy Technology Data Exchange (ETDEWEB)
Wu, Ko-Jen
2013-12-10
An intake system for an internal combustion engine comprises an exhaust driven turbocharger configured to deliver compressed intake charge, comprising exhaust gas from the exhaust system and ambient air, through an intake charge conduit and to cylinders of the internal combustion engine. An intake charge cooler is in fluid communication with the intake charge conduit. A cooling system, independent of the cooling system for the internal combustion engine, is in fluid communication with the intake charge cooler through a cooling system conduit. A coolant pump delivers a low temperature cooling medium from the cooling system to and through the intake charge cooler for the transfer of heat from the compressed intake charge thereto. A low temperature cooler receives the heated cooling medium through the cooling system conduit for the transfer or heat therefrom.
Three-body calculation of Be double- hypernuclei
Indian Academy of Sciences (India)
Hossein Sadeghi; Hassan Khalili; Shahla Nahidinejad
2014-09-01
Energy levels and bond energy of the double- hypernucleus are calculated by considering two- and three-cluster interactions. Interactions between constituent particles are contact interactions for reproducing the low binding energy of nuclei. The effective action is constructed to involve three-body forces. In this paper, we also compare the obtained binding energy result with experimental and other cluster and shell models. The results of all schemes agree very well showing the high accuracy of our method to calculate the other many-body hyperonic nuclei using three-cluster interactions. The experimental values of $B_{}$(${}^{10}_{}$ Be) = (11.90 ± 0.13) MeV, $B_{}$(${}^{11}_{}$Be) = (20.49 ± 1.15) MeV and $B_{}$(${}^{12}_{}$Be) = (22.23 ± 1.15) MeV seem to be more compatible with our calculated value of $B_{}$(${}^{10}_{}$Be) = 14.04 MeV, $B_{}$(${}^{11}_{}$Be) = 19.31 MeV and $B_{}$(${}^{12}_{}$Be) = 21.45 MeV in comparison with the other calculated results by Hiyama et al, Gal et al and Guleria et al.
Global Regularization Method for Planar Restricted Three-body Problem
Sharaf, M. A.; Dwidar, H. R.
2015-12-01
In this paper, global regularization method for planar restricted three-body problem is purposed by using the transformation z=x+iy=ν cos n(u+iv), where i=√{-1}, 0 computationally. For the analytical developments, analytical solutions in power series of the pseudo-time τ are obtained for positions and velocities (u,v,u',v') and (x,y,dot{x},dot{y}) in both regularized and physical planes respectively, the physical time {t} is also obtained as power series in τ. Moreover, relations between the coefficients of the power series are obtained for two consequent values of {n}. Also, we developed analytical solutions in power series form for the inverse problem of finding τ in terms of {t}. As typical examples, three symbolic expressions for the coefficients of the power series were developed in terms of the initial values. As to the computational developments, the global regularized equations of motion are developed together with their initial values in forms suitable for digital computations using any differential equations solver. On the other hand, for the numerical evolutions of power series, an efficient method depending on the continued fraction theory is provided.
Ejection and Capture Dynamics in Restricted Three-Body Encounters
Kobayashi, Shiho; Sari, Re'em; Rossi, Elena M
2012-01-01
We study the tidal disruption of binaries by a massive point mass (e.g. the black hole at the Galactic center), and we discuss how the ejection and capture preference between unequal-mass binary members depends on which orbit they approach the massive object. We show that the restricted three-body approximation provides a simple and clear description of the dynamics. The orbit of a binary with mass m around a massive object M should be almost parabolic with an eccentricity |1-e| < (m/M)^{1/3} << 1 for a member to be captured, while the other is ejected. Indeed, the energy change of the members obtained for a parabolic orbit can be used to describe non-parabolic cases. If a binary has an encounter velocity much larger than (M/m)^{1/3} times the binary rotation velocity, it would be abruptly disrupted, and the energy change at the encounter can be evaluated in a simple disruption model. We evaluate the probability distributions for the ejection and capture of circular binary members and for the final e...
International Nuclear Information System (INIS)
We investigate the stability and phase transition of localized modes in Bose–Einstein Condensates (BECs) in an optical lattice with the discrete nonlinear Schrödinger model by considering both two- and three-body interactions. We find that there are three types of localized modes, bright discrete breather (DB), discrete kink (DK), and multi-breather (MUB). Moreover, both two- and three-body on-site repulsive interactions can stabilize DB, while on-site attractive three-body interactions destabilize it. There is a critical value for the three-body interaction with which both DK and MUB become the most stable ones. We give analytically the energy thresholds for the destabilization of localized states and find that they are unstable (stable) when the total energy of the system is higher (lower) than the thresholds. The stability and dynamics characters of DB and MUB are general for extended lattice systems. Our result is useful for the blocking, filtering, and transfer of the norm in nonlinear lattices for BECs with both two- and three-body interactions
HCI-induced molecule fragmentation: non-Coulombic explosion and three-body effects
International Nuclear Information System (INIS)
The study of highly charged ion-induced diatomic (CO) and triatomic (CO2) molecules fragmentation by the coincident measurement of the fragment momenta is presented. It is shown that the experimental results together with ab initio calculations including a large number of potential energy curves evidence the limitation of the Coulomb explosion model to reproduce the dynamics of the fragmentation. The geometry modification of the CO2 molecule during the breakup is explored and the concerted or sequential nature of the dissociation is discussed for two fragmentation channels. Finally, the fragmentation of the H2 molecules following collisions with slow multicharged ions is analysed for various projectiles and energies. From the energy spectra, the effect of the projectile on the H+ fragments is evidenced. This three-body effect is discussed in connection with the results of two model calculations including or not the role of the projectile. (orig.)
State approaches to the system benefits charge
Energy Technology Data Exchange (ETDEWEB)
Fang, J M
1997-07-01
This report documents the consideration and implementation of a non-bypassable system benefits charge (SBC) in six states through mid-May 1997. The SBC is being established to sustain important public-policy programs during the electric industry restructuring process. The states covered include Arizona, California, Massachusetts, New York, Rhode Island, and Wisconsin. This report was prepared for the Office of Energy and Resource Planning, Utah Department of Natural Resources, under the National Renewable Energy Laboratory`s Sustainable Technology Energy Partnerships Initiative, Second Round (STEP-2). The purpose of the report is to provide decision makers in Utah, including the Utah Public Service Commission and the state legislature, with relevant information on the SBC for use in their deliberation on the matter. The issues faced by the six states are the SBC in general; surcharge rate or funding levels; administrative structure and procedures; and actions, guidelines, and principles by program area.
Liu, H; Glöckle, W; Elster, Ch.
2002-01-01
The Faddeev equations for the three-body bound state are solved directly as thre e-dimensional integral equations without employing partial wave decomposition. Two-body forces of the Malfliet-Tjon type and simple spin independent genuine three-body forces are considered for the calculation of the three-body binding energy.
Řezáč, Jan; Huang, Yuanhang; Hobza, Pavel; Beran, Gregory J O
2015-07-14
Many-body noncovalent interactions are increasingly important in large and/or condensed-phase systems, but the current understanding of how well various models predict these interactions is limited. Here, benchmark complete-basis set coupled cluster singles, doubles, and perturbative triples (CCSD(T)) calculations have been performed to generate a new test set for three-body intermolecular interactions. This "3B-69" benchmark set includes three-body interaction energies for 69 total trimer structures, consisting of three structures from each of 23 different molecular crystals. By including structures that exhibit a variety of intermolecular interactions and packing arrangements, this set provides a stringent test for the ability of electronic structure methods to describe the correct physics involved in the interactions. Both MP2.5 (the average of second- and third-order Møller-Plesset perturbation theory) and spin-component-scaled CCSD for noncovalent interactions (SCS-MI-CCSD) perform well. MP2 handles the polarization aspects reasonably well, but it omits three-body dispersion. In contrast, many widely used density functionals corrected with three-body D3 dispersion correction perform comparatively poorly. The primary difficulty stems from the treatment of exchange and polarization in the functionals rather than from the dispersion correction, though the three-body dispersion may also be moderately underestimated by the D3 correction. PMID:26575743
Dark energy in the three-body problem: Wide triple galaxies
Emel'yanov, N. V.; Kovalev, M. Yu.; Chernin, A. D.
2016-04-01
The structure and evolution of triple galaxy systems in the presence of the cosmic dark-energy background is studied in the framework of the three-body problem. The dynamics of wide triple systems are determinedmainly by the competition between the mutual gravitational forces between the three bodies and the anti-gravity created by the dark-energy background. This problem can be solved via numerical integration of the equations of motion with initial conditions that admit various types of evolutionary behavior of the system. Such dynamical models show that the anti-gravity created by dark energy makes a triple system less tightly bound, thereby facilitating its decay, with a subsequent transition to motion of the bodies away from each other in an accelerating regime with a linear Hubble-law dependence of the velocity on distance. The coefficient of proportionality between the velocity and distance in this asymptotic relation corresponds to the universal value H Λ = 61 km s-1 Mpc-1, which depends only on the dark-energy density. The similarity of this relation to the large-scale recession of galaxies indicates that double and triple galaxies represent elementary dynamical cells realizing the overall behavior of a system dominated by dark energy on their own scale, independent of their masses and dimensions.
Fractal structures for the Jacobi Hamiltonian of restricted three-body problem
Rollin, G; Shepelyansky, D L
2015-01-01
We study the dynamical chaos and integrable motion in the planar circular restricted three-body problem and determine the fractal dimension of the spiral strange repeller set of non-escaping orbits at different values of mass ratio of binary bodies and of Jacobi integral of motion. We find that the spiral fractal structure of the Poincar\\'e section leads to a spiral density distribution of particles remaining in the system. We also show that the initial exponential drop of survival probability with time is followed by the algebraic decay related to the universal algebraic statistics of Poincar\\'e recurrences in generic symplectic maps.
Exponentially improved classical and quantum algorithms for three-body Ising models
Van den Nest, M.; Dür, W.
2014-01-01
We present an algorithm to approximate partition functions of three-body classical Ising models on two-dimensional lattices of arbitrary genus, in the real-temperature regime. Even though our algorithm is purely classical, it is designed by exploiting a connection to topological quantum systems, namely, the color codes. The algorithm performance (in achievable accuracy) is exponentially better than other approaches that employ mappings between partition functions and quantum state overlaps. In addition, our approach gives rise to a protocol for quantum simulation of such Ising models by simply measuring local observables on color codes.
Fractal structures for the Jacobi Hamiltonian of restricted three-body problem
Rollin, G.; Lages, J.; Shepelyansky, D. L.
2016-08-01
We study the dynamical chaos and integrable motion in the planar circular restricted three-body problem and determine the fractal dimension of the spiral strange repeller set of non-escaping orbits at different values of mass ratio of binary bodies and of Jacobi integral of motion. We find that the spiral fractal structure of the Poincaré section leads to a spiral density distribution of particles remaining in the system. We also show that the initial exponential drop of survival probability with time is followed by the algebraic decay related to the universal algebraic statistics of Poincaré recurrences in generic symplectic maps.
Electric Vehicle (EV) Charging Management with Dynamic Distribution System Tariff
DEFF Research Database (Denmark)
O'Connell, Niamh; Wu, Qiuwei; Østergaard, Jacob;
2011-01-01
congestions in local distribution systems from the day-ahead planning perspective. Locational marginal pricing method was used to determine the dynamic distribution system tariff based on predicted day-ahead spot prices and predicted charging behaviors. Distribution grids of the Bornholm power system were......An electric vehicle (EV) charging schedule algorithm was proposed in this paper in order to charge EVs to meet EV users’ driving needs with the minimum EV charging cost and respect the local distribution system constraints. A day-ahead dynamic distribution system tariff scheme was proposed to avoid...
On reduction of the general three-body Newtonian problem and the curved geometry
International Nuclear Information System (INIS)
In the framework of an idea of separation of rotational and vibrational motions, we have examined the problem of reducing the general three-body problem. The class of differentiable functions allowing transformation of the 6D Euclidean space to the 6D conformal-Euclidean space is defined. Using this fact the general classical three-body problem is formulated as a problem of geodesic flows on the energy hypersurface of the bodies system. It is shown that when the total potential depends on relative distances between the bodies, three from six ordinary differential equations of second order describing the non-integrable hamiltonian system are integrated exactly, thus allowing reducing the initial system in the phase space to the autonomous system of the 6th order. In the result of reducing of the initial Newtonian problem the geometry of reduced problem becomes curved. The latter gives us new ideas related to the problem of geometrization of physics as well as new possibilities for study of different physical problems.
Nuclear spectroscopy on charge density wave systems
International Nuclear Information System (INIS)
This book is the first coherent presentation of investigations of charge density wave (CDW) systems by nuclear spectroscopic techniques. It is addressed to the graduate students and elder scientist who are interested in modern aspects of solid state physics and want to acquire a broader knowledge of nuclear spectroscopy techniques applied to CDW systems. Chapter 1 gives a short introduction to CDW's in general and to the question what can be learned about CDW's by nuclear spectroscopy techniques. Chapter 2 gives a Landau theory description of CDW formation in chain-like tetrachalcogenides. Chapter 3 treats experimental results on layered transition metal compounds. A short introduction to nuclear magnetic resonance (NMR), nuclear quadrupole resonance (NQR), time differential perturbed angular correlation (TDPAC), and the Moessbauer effect (ME) is included in this chapter because all three techniques have been extensively applied to Ta-dichalcogenides which are prominent members of this family of materials. Chapter 4 and 5 treat in great detail CDW dynamics and transport in chain-like like transition metal chalcogenides and molybdenum bronzes, respectively. Chapter 6 treats the one-dimensional inorganic complex salt K-2Pt(CN)4Br0.3.2H2O (KCP) studied by NMR on a variety of nuclei. Chapter 7 demonstrates the tremendous advances of high resolution NMR in yielding spin density maps of organic radical salts and is intended to stimulate the application of this powerful technique more directly to CDW phenomena
Emerging bosons with three-body interactions from spin-1 atoms in optical lattices
International Nuclear Information System (INIS)
We study two many-body systems of bosons interacting via an infinite three-body contact repulsion in a lattice: a pairs quasicondensate induced by correlated hopping and the discrete version of the Pfaffian wave function. We propose to experimentally realize systems characterized by such interaction by means of a proper spin-1 lattice Hamiltonian: spin degrees of freedom are locally mapped into occupation numbers of emerging bosons, in a fashion similar to spin-1/2 and hardcore bosons. Such a system can be realized with ultracold spin-1 atoms in a Mott insulator with a filling factor of 1. The high versatility of these setups allows us to engineer spin-hopping operators breaking the SU(2) symmetry, as needed to approximate interesting bosonic Hamiltonians with three-body hardcore constraint. For this purpose we combine bichromatic spin-independent superlattices and Raman transitions to induce a different hopping rate for each spin orientation. Finally, we illustrate how our setup could be used to experimentally realize the first setup, that is, the transition to a pairs quasicondensed phase of the emerging bosons. We also report on a route toward the realization of a discrete bosonic Pfaffian wave function and list some open problems for reaching this goal.
A non-variational approach to the quantum three-body Coulomb problem
Chi, Xuguang
2005-07-01
This thesis presents a general non-variational approach to the solution of three-body Schrodinger's equation with Coulomb interactions, based on the utilization of symmetries intrinsic to the three-body Laplacian operator first proposed by W. Y. Hsiang. Through step by step reductions, the center of mass degree of freedom is first removed, followed by the separation of all the rotational degrees of freedom, leading to a coupled partial differential equations (PDEs) in terms of the rotationally invariant internal variables {f1, f2, f3}. A crucial observation is that in the subspace where all the rotational degrees of freedom have been removed, there is an intrinsic spherical symmetry which can be fully utilized through the introduction of hyperspherical coordinates. By expressing the reduced Schrodinger's PDEs (with all the rotational degrees of freedom separated out) in terms of the hyperspherical coordinates, with the subsequent introduction of Jacobi polynomials as the angular eigenfunctions and Laguerre polynomials to expand the radial component, a system of infinite linear algebraic equations is obtained for the expansion coefficients. A numerical scheme is presented whereby the Coulomb interaction matrix elements are calculated to a very high degree of accuracy with minimal effort, and the truncation of the linear equations is carried out through a systematic procedure. The resulting matrix equations are solved through an iteration process, carried out on a PC. Numerical results are presented for the hydrogen negative ion H-, the helium and helium-like ions (Z = 3˜6), the hydrogen molecule ion H+2 and the positronium negative ion Ps-. Comparison with the variational and other approaches shows our results to be of comparable accuracy for the eigenenergies, but can yield highly accurate wave functions as by-products. Results on low-lying excited states are obtained simultaneously with the ground state properties with no extra effort. In particular, for the
3He(d,p)4He reaction calculation with three-body Faddeev equations
International Nuclear Information System (INIS)
In order to investigate the 3He-n-p system as a three-body problem, we have formulated 3He-n and 3H-p effective potentials using both a microscopic treatment and a phenomenological approach. In the microscopic treatment, potentials are generated by means of the resonating group method (RGM) based on the Minnesota nucleon-nucleon potential. These potentials are converted into separable form by means of the microscopic Pauli correct (MPC) method. The MPC potentials are properly formulated to avoid Pauli forbidden states. The phenomenological potentials are obtained by modifying parameters of the EST approximation to the Paris nucleon-nucleon potential, such that they fit the low-energy 3He-n, 3H-p, and 3He-p phase shifts. Therefore, they describe the 3He-n differential cross section, the polarization observables, and the energy levels of 4He. The 3He-n-p Faddeev equations are solved numerically. We reproduce correctly the ground state and the first excited state of 5Li. Furthermore, the Paris-type potential is used to investigate the 3He(d,p)4He reaction at a deuteron bombarding energy of 270 MeV, where the system is treated as a three-body problem. Results for the polarized and unpolarized differential cross sections demonstrate convergence of the Born series. (orig.)
On Out of Plane Equilibrium Points in Photo-Gravitational Restricted Three-Body Problem
Indian Academy of Sciences (India)
M. K. Das; Pankaj Narang; S. Mahajan; M. Yuasa
2009-09-01
We have investigated the out of plane equilibrium points of a passive micron size particle and their stability in the field of radiating binary stellar systems Krüger-60, RW-Monocerotis within the framework of photo-gravitational circular restricted three-body problem. We find that the out of plane equilibrium points (, = 6, 7, 8, 9) may exist for range of 1 (ratio of radiation to gravitational force of the massive component) values for these binary systems in the presence of Poynting–Robertson drag (hereafter PR-drag). In the absence of PR-drag, we find that the motion of a particle near the equilibrium points 6,7 is stable in both the binary systems for a specific range of 1 values. The PR-drag is shown to cause instability of the various out of plane equilibrium points in these binary systems.
DEFF Research Database (Denmark)
Jensen, Mogens Høgh; Lomdahl, P. S.
1982-01-01
lower and higher charge than ±2e / 3. The effect of discreteness is taken into account and gives rise to chaotic deformed solitons as the interchain coupling increases. The model may be applied to tetrathiafulvalene tetracyanoquinodimethane (TTF-TCNQ) under 19-kbar pressure.......We have studied the effect of interchain interaction on thermally excited solitons in a charge-density wave for a Peierls system of commensurability 3. In such a system solitons with charges ±2e / 3 are expected. It is shown that the interchain coupling in some cases will generate solitons with...
Nucleon-nucleon scattering length from three-body reactions
International Nuclear Information System (INIS)
Experiments aimed at the measurement of the singlet scattering lengths 1anp and 1ann of the NN-interaction in the presence of a heavy spectator are described. The values obtained are compared with the results of measurements of other reactions. The very good agreement of the experimental values of 1anp from all breakup reactions and elastic scattering as well as agreement of the values of 1ann from breakup reactions and disagreement with the value from the π-d → nnγ reaction cast doubts on the hypothesis ascribing this discrepancy to a 3N-force. This result also suggests a stronger effect of a violation of the charge independence principle than previously accepted. 101 refs., 18 figs., 3 tabs. (author)
Three-body scattering problem in the fixed center approximation: the case of attraction
Kudryavtsev, Alexander E; Romanov, Alexander I
2016-01-01
We study scattering of a light particle on a bound pair of heavy particles (e.g., the deuteron) within the fixed center approximation in the case of light-heavy attraction, solving the integral equation for the three-body Green's function both in the coordinate and in the momentum space. The results for the three-body scattering amplitude appear to be ambiguous -- they depend on a single real parameter. This parameter may be fixed by a three-body input, e.g., the three-body scattering length. We also solve the integral equation for the three-body Green function in the momentum space, introducing a finite cut-off. We show that all three approaches are equivalent. We also discuss how our approach to the problem matches with the introduction of three-body contact interaction as done by other authors.
Nonlocal Properties of Dynamical Three-Body Casimir-Polder Forces
International Nuclear Information System (INIS)
We consider the three-body Casimir-Polder interaction between three atoms during their dynamical self-dressing. We show that the time-dependent three-body Casimir-Polder interaction energy displays nonlocal features related to quantum properties of the electromagnetic field and to the nonlocality of spatial field correlations. We discuss the measurability of this intriguing phenomenon and its relation with the usual concept of stationary three-body forces
Energy Technology Data Exchange (ETDEWEB)
Clark, N.N.; Means, K.H.; James, R.; Thompson, T.
1991-01-01
Three-body wear involves two surfaces and an intermediate particle trapped between the two surfaces. A machine has been constructed to measure normal and frictional forces due to three-body wear. This machine accurately positions specimens a predetermined distance apart from each other and introduces particles to the interface between the specimens. Different types of specimen combinations have been tested to give a variety of data. Loads that result from the wear test are sampled and stored. Wear coefficients and rates of wear have been calculated for all specimens. (VC)
Motions of Kepler circumbinary planets in restricted three-body problem under radiating primaries
Energy Technology Data Exchange (ETDEWEB)
Dermawan, B., E-mail: budider@as.itb.ac.id; Hidayat, T., E-mail: taufiq@as.itb.ac.id [Astronomy Research Division, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Jalan Ganesha 10, Bandung 40132 (Indonesia); Huda, I. N., E-mail: ibnu.nurul@students.itb.ac.id; Mandey, D., E-mail: mandey.de@gmail.com; Utama, J. A., E-mail: judhistira@yahoo.com; Tampubolon, I., E-mail: ihsan.tampubolon@gmail.com [Department of Astronomy, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Jalan Ganesha 10, Bandung 40132 (Indonesia); Wibowo, R. W., E-mail: ridlo.w.wibowo@gmail.com [Department of Computational Science, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Jalan Ganesha 10, Bandung 40132 (Indonesia)
2015-09-30
By observing continuously a single field of view in the sky, Kepler mission reveals outstanding results on discoveries of exoplanets. One of its recent progress is the discoveries of circumbinary planets. A circumbinary planet is an exoplanet that moves around a binary system. In this study we investigate motions of Kepler circumbinary planets belong to six binary systems, namely Kepler-16, -34, -35, -38, -47, and -413. The motions are considered to follow the Restricted Three-Body Problem (RTBP). Because the primaries (central massive objects) are stars, they are both radiatives, while the planet is an infinitesimal object. The primaries move in nearly circular and elliptic orbits with respect to their center of masses. We describe, in general, motions of the circumbinary planets in RTBP under radiating primaries. With respect to the averaged zero velocity curves, we show that motions of the exoplanets are stable, in accordance with their Hill stabilities.
Use of the Faddeev differential equations for computations of three-body resonances
International Nuclear Information System (INIS)
Algorithm, based on explicit representations for analytic continuation of the T-matrix Faddeev components on unphysical sheets, is worked out for calculations of resonances in the three-body quantum problem. According to the representations, poles of T-matrix, scattering matrix and Green function on unphysical sheets, interpreted as resonances, coincide with those complex energy values where appropriate truncations of the scattering matrix have zero as eigenvalue. Scattering amplitudes on the unphysical sheet, necessary to construct scattering matrix, are calculated on the basis of the Faddeev differential equations. The algorithm developed is applied to search for the resonances in the nnp system and in a model three-boson system. 31 refs., 4 figs., 1 tab
Approximation properties of basis functions in variational three-body problem
Vanyashin, V S
2000-01-01
A new variational basis with well-behaved local approximation properties and multiple output is proposed for Coulomb systems. The trial function has proper behaviour at all Coulomb centres. Nonlinear asymptotic parameters are introduced softly: they do not destroy the self-optimized local behaviour of the wave function at vanishing interparticle distances. The diagonalization of the Hamiltonian on a finite Hilbert subspace gives a number of meaningful eigenvalues. Thus together with the ground state some excited states are also reliably approximated. For three-body systems all matrix elements are analytically obtainable up to rational functions of asymptotic parameters. The feasibility of the new basis usage has been proved by a pilot computer algebra calculation. The negative sign of an electron pair local energy at their Coulomb centre has been revealed. PACS number: 31.15.Pf
Motions of Kepler circumbinary planets in restricted three-body problem under radiating primaries
International Nuclear Information System (INIS)
By observing continuously a single field of view in the sky, Kepler mission reveals outstanding results on discoveries of exoplanets. One of its recent progress is the discoveries of circumbinary planets. A circumbinary planet is an exoplanet that moves around a binary system. In this study we investigate motions of Kepler circumbinary planets belong to six binary systems, namely Kepler-16, -34, -35, -38, -47, and -413. The motions are considered to follow the Restricted Three-Body Problem (RTBP). Because the primaries (central massive objects) are stars, they are both radiatives, while the planet is an infinitesimal object. The primaries move in nearly circular and elliptic orbits with respect to their center of masses. We describe, in general, motions of the circumbinary planets in RTBP under radiating primaries. With respect to the averaged zero velocity curves, we show that motions of the exoplanets are stable, in accordance with their Hill stabilities
Three-body forces mandated by Poincare invariance
International Nuclear Information System (INIS)
Poincare invariant models for the three-nucleon system are examined which have the same heuristic relation to field theories as the nonrelativistic nuclear models. The generators of the infinitesimal dynamical transformations can be obtained as functions of the kinematic generators, the invariant mass operator of the interacting system, and additional operators. These additional operators are the components of the Newton-Wigner position operator in the instant form, and the transverse components of the spin in the front form. The relativistic dynamics of Poincare transformations is examined, and then these concepts are applied to two-nucleon systems. The transition to a fully interacting three-nucleon system is made
Development of quick charging system for electric vehicle
Energy Technology Data Exchange (ETDEWEB)
Anegawa, Takafumi
2010-09-15
Despite low environmental impact and high energy efficiency, electric vehicles (EV) have not been widely accepted. The lack of charging infrastructure is one reason. Since lithium-ion battery has high energy density and low internal resistance that allows quick charging, the convenience of EV may be greatly improved if charging infrastructure is prepared adequately. TEPCO aims for EV spread to reduce CO2 emissions and to increase demand for electric power, and has developed quick charging system for fleet-use EV to improve the convenience of EV. And based on research results, we will propose desirable characteristics of quick charger for public use.
Suzaku Observations of Charge Exchange Emission from Solar System Objects
Ezoe, Y.; Fujimoto, R.; Yamasaki, N. Y.; Mitsuda, K.; Ohashi, T.; Ishikawa, K.; Oishi, S.; Miyoshi, Y; Terada, N.; Futaana, Y.; Porter, F. S.; Brown, G. V.
2012-01-01
Recent results of charge exchange emission from solar system objects observed with the Japanese Suzaku satellite are reviewed. Suzaku is of great importance to investigate diffuse X-ray emission like the charge exchange from planetary exospheres and comets. The Suzaku studies of Earth's exosphere, Martian exosphere, Jupiter's aurorae, and comets are overviewed.
Effects of Microscopic Three-body Forces in Asymmetric Nuclear Matter
Institute of Scientific and Technical Information of China (English)
无
2001-01-01
The efiects of microscopic three-body forces on the equatioil of state(EOS)and the single particle properties of isospin asymmetric nuclear matter have been studied within Brueckner-Hartree-Fock framework~[1]The microscopic three-body force model constructed from meson exchange current approach in Ref.~[2] has been extended to isospin asymmetric nuclear matter
Quasi-periodic Solutions of the Spatial Lunar Three-body Problem
ZHAO Lei
2013-01-01
By application of KAM theorem to Lidov-Ziglin's global study of the quadrupolar approximation of the spatial lunar three-body problem, we establish the existence of several families of quasi-periodic orbits in the spatial lunar three-body problem.
Nuclear matter with three-body forces from self-consistent spectral calculations
Soma, Vittorio; Bozek, Piotr
2007-01-01
We calculate the equation of state of nuclear matter in the self-consistent T-matrix scheme including three-body nuclear interactions. We study the effect of the three-body force on the self-energies and spectral functions of nucleons in medium.
Development of a Space-charge-sensing System
Directory of Open Access Journals (Sweden)
Teiji Watanabe
2007-12-01
Full Text Available A system for remotely measuring the distribution of air space charge in real time is developed. The system consists of a loudspeaker and an electric field antenna. By propagating a burst of directional sound wave from the speaker, a modulation in the space charge and, therefore, an electric field change at ground is produced. The distribution of the space charge density is derived from the E-field change which can be measured by the E- field antenna. The developed system has been confirmed by both laboratory and field experiments.
Three-body bound states in atomic mixtures with resonant p-wave interaction
Efremov, Maxim A; Ivanov, Misha Yu; Schleich, Wolfgang P
2013-01-01
We employ the Born-Oppenheimer approximation to find the effective potential in a three-body system consisting of a light particle and two heavy ones when the heavy-light short-range interaction potential has a resonance corresponding to a non-zero orbital angular momentum. In the case of an exact resonance in the p-wave scattering amplitude, the effective potential is attractive and long-range, namely it decreases as the third power of the inter-atomic distance. Moreover, we show that the range and power of the potential, as well as the number of bound states are determined by the mass ratio of the particles and the parameters of the heavy-light short-range potential.
Analytic Expression for Three-Body Recombination Rates into Deep Dimers
International Nuclear Information System (INIS)
We investigate three-body recombination rates into deep dimers in cold atomic gases with large scattering length within hyper-spherical adiabatic zero-range approach. We derive closed analytic expressions for the rates for one- and two-species gases. Although the deep dimers are beyond the zero-range theory the latter can still describe the recombination into deep dimers by use of one additional short-range absorption parameter. The recombination rate, as function of the scattering length, retains the known universal behavior—the fourth power trend with characteristic log-periodic peaks—however increasing the short-range absorption broadens the peaks until they are eventually completely smeared out. Increasing the heavy-to-light mass ratio in a two-species system with two identical bosons and a third particle decreases the distance between the peaks and increases the overall scale of the recombination rate. (author)
Muonic molecules as three-body Coulomb problem in adiabatic approximation
International Nuclear Information System (INIS)
The three-body Coulomb problem is treated within the framework of the hyperspherical adiabatic approach. The surface functions are expanded into Faddeev-type components in order to ensure the equivalent representation of all possible two-body contributions. It is shown that this decomposition reduces the numerical effort considerably. The remaining radial equations are solved both in the extreme and the uncoupled adiabatic approximation to determine the binding energies of the systems (dtμ) and (d3Heμ). Whereas the ground state is described very well in the uncoupled adiabatic approximation, the excited states should be treated within the coupled adiabatic approximation to obtain good agreement with variational calculations. (orig.)
Thomas-Ehrman effect in a three-body model: $^{16}$Ne case
Grigorenko, L V; Zhukov, M V
2014-01-01
The dynamic mechanism of the Thomas-Ehrman shift is studied in three-cluster systems by example of $^{16}$Ne and $^{16}$C isobaric mirror partners. We predict configuration mixings for $0^+$ and $2^+$ states in $^{16}$Ne and $^{16}$C. Large isospin symmetry breaking on the level of wave function component weights is demonstrated for these states and discussed as three-body mechanism of Thomas-Ehrman shift. It is shown that the description of the Coulomb displacement energies requires a consistency among three parameters: the $^{16}$Ne decay energy $E_T$, the $^{15}$F ground state energy $E_r$, and the configuration mixing parameters for the $^{16}$Ne/$^{16}$C $0^+$ and $2^+$ states. Basing on this analysis we infer the $^{15}$F $1/2^+$ ground state energy to be $E_r=1.39-1.42$ MeV.
The study of atomic three-body problems in hyperspherical coordinates
International Nuclear Information System (INIS)
In this review the application of hyperspherical coordinates is discussed for the solution of some of the typical atomic and molecular problems, and the new physical insights obtained from such studies are shown. In particular, it is shown how correlations between two excited electrons can be conveniently understood in terms of the surface harmonics at a constant hyperradius and visualized by displaying the surface charge densities on the angular coordinates that describe radial and angular correlations. It is shown that a new set of correlation quantum numbers K, T and A for any two-electron states can be deduced by analyzing the surface harmonics; here K and T describe angular correlation and A = +1, -1 or 0) describes radial correlation. Because of the isomorphic correlations, states which have A = +1 or -1 are shown to exhibit supermultiplet structure while states which have A = 0 are shown to behave like singly excited states. Therefore this classification scheme includes the independent particle approximation as a subset. The relations of these quantum numbers to the collective vibrations and rotations of molecule-like normal modes are also discussed. Applications of hyperspherical harmonics to the three-body breakup and linear triatomic collisions are also discussed briefly. 57 refs., 15 figs
Deep Charging Evaluation of Satellite Power and Communication System Components
Schneider, T. A.; Vaughn, J. A.; Chu, B.; Wong, F.; Gardiner, G.; Wright, K. H.; Phillips, B.
2016-01-01
Deep charging, in contrast to surface charging, focuses on electron penetration deep into insulating materials applied over conductors. A classic example of this scenario is an insulated wire. Deep charging can pose a threat to material integrity, and to sensitive electronics, when it gives rise to an electrostatic discharge or arc. With the advent of Electric Orbit Raising, which requires spiraling through Earth's radiation belts, satellites are subjected to high energy electron environments which they normally would not encounter. Beyond Earth orbit, missions to Jupiter and Saturn face deep charging concerns due to the high energy radiation environments. While predictions can be made about charging in insulating materials, it is difficult to extend those predictions to complicated geometries, such as the case of an insulating coating around a small wire, or a non-uniform silicone grouting on a bus bar. Therefore, to conclusively determine the susceptibility of a system to arcs from deep charging, experimental investigations must be carried out. This paper will describe the evaluation carried out by NASA's Marshall Space Flight Center on subscale flight-like samples developed by Space Systems/Loral, LLC. Specifically, deep charging evaluations of solar array wire coupons, a photovoltaic cell coupon, and a coaxial microwave transmission cable, will be discussed. The results of each evaluation will be benchmarked against control sample tests, as well as typical power system levels, to show no significant deep charging threat existed for this set of samples under the conditions tested.
Capacitor discharge ignition system having a charging control means
Energy Technology Data Exchange (ETDEWEB)
Fitzner, A.O.
1984-02-28
The invention provides charging control circuitry for a capacitor descharge ignition system having power capacitors connected to be discharged by main electronic switches such as SCR's into ignition transformers to sequentially fire the engine's spark plugs. The charging control circuits each include a charging SCR to limit charging current flow to the main capacitor, unless a discharge pulse into the ignition transformer has occurred in the recent past. Thus if a short circuit in either the main capacitor or main SCR in one of the ignition circuits prevents that ignition circuit form properly functioning, the charging SCR will limit the flow of charging current to the defective circuit and allow the other ignition circuit to receive charging current. The gate of the charging SCR is controlled by an amplified signal from a memory capacitor which is charged by the discharge pulse from the corresponding ignition circuit. The same memory capacitor also provides power to drive an indicator such as a light emitting diode.
Three-body recombination of two-component cold atomic gases into deep dimers in an optical model
DEFF Research Database (Denmark)
Mikkelsen, Mathias; Jensen, A. S.; Fedorov, D. V.; Zinner, Nikolaj Thomas
2015-01-01
We consider three-body recombination into deep dimers in a mass-imbalanced two-component atomic gas. We use an optical model where a phenomenological imaginary potential is added to the lowest adiabatic hyper-spherical potential. The consequent imaginary part of the energy eigenvalue corresponds to...... the decay rate or recombination probability of the three-body system. The method is formulated in details and the relevant qualitative features are discussed as functions of scattering lengths and masses. We use zero-range model in analyses of recent recombination data. The dominating scattering...... length is usually related to the non-equal two-body systems. We account for temperature smearing which tends to wipe out the higher-lying Efimov peaks. The range and the strength of the imaginary potential determine positions and shapes of the Efimov peaks as well as the absolute value of the...
Research on Battery Charging-Discharging in New Energy Systems
Che Yanbo; Zhou Yan; Sun Yue; Hu Bo
2013-01-01
As an energy storage component, the battery plays increasingly important role in new energy industry. Charging and discharging system is the vital part of the application of the battery, but the charge and discharge are always designed separately and carried by different part in the traditional application. Additionally, most battery discharge mode and method are always simplified which cannot ensure to meet the demand of power utilization. In the actual energy storage system, the design of t...
Charge frustration in complex fluids and in electronic systems
Carraro, Carlo
1996-01-01
The idea of charge frustration is applied to describe the properties of such diverse physical systems as oil-water-surfactant mixtures and metal-ammonia solutions. The minimalist charge-frustrated model possesses one energy scale and two length scales. For oil-water-surfactant mixtures, these parameters have been determined starting from the microscopic properties of the physical systems under study. Thus microscopic properties are successfully related to the observed mesoscopic structure.
A survey of different classes of Earth-to-Moon trajectories in the patched three-body approach
de Sousa-Silva, Priscilla A.; Terra, Maisa O.
2016-06-01
This paper deals with Earth-to-Moon transfers in the patched three-body approach, in which the Sun-Earth-Moon-Spacecraft four-body system is approximated by two coupled Circular Restricted Three-Body Problems (CR3BP). This approach provides preliminary solutions that can be numerically refined into full four-body solutions. The standard transfers in this approach are low-energy manifold guided solutions with long transfer time which connect transit and non-transit orbits of each three-body system. Besides the standard transit-non-transit connections, there are alternative solutions involving a bi-parametric family of quasi-periodic orbits around the Earth. These solutions connect quasi-periodic orbits on two-dimensional tori of the Sun-Earth-Spacecraft system with L1 or L2 transit solutions of the Earth-Moon-Spacecraft system to provide transfers with lunar ballistic capture and short flight time. We review the dynamical elements employed to obtain the different classes of transfers and give examples of solutions obtained from sets of initial conditions around the Earth that are consistent with current infrastructure for space exploration.
Electrophysical Systems Based On Charged Particle Accelerators
Vorogushin, M F
2004-01-01
The advancement of the charged particle accelerator engineering affects appreciably the modern tendencies of the scientific and technological progress in the world. In a number of advanced countries, this trend is one of the most dynamically progressing in the field of applied science and high-technology production. Such internationally known firms as VARIAN, SIEMENS, PHILIPS, ELECTA, IBA, HITACHI, etc., with an annual budget of milliards of dollars and growth rate of tens of percent may serve as an example. Although nowadays the projects of new large-scale accelerators for physical research are not implemented so quickly and frequently as desired, accelerating facilities are finding ever-widening application in various fields of human activities. The contribution made by Russian scientists into high-energy beams physics is generally known. High scientific and technical potential in this field, qualified personnel with a high creative potential, modern production and test facilities and state-of-the-art techn...
Nonlinear Landau-Zener Tunnelling with Two and Three-Body Interactions
Institute of Scientific and Technical Information of China (English)
WEI Xiu-Fang; TANG Rong-An; YONG Wen-Mei; XUE Ju-Kui
2008-01-01
We investigate the nonlinear Landau-Zener tunnelling of Bose-Einstein condensate (BEC) in an accelerating optical lattice with two- and three-body interactions between the particles. The influence of the three-body interaction on the eigenstates and the transition probability are discussed both analytically and numerically.The analytical eigenstates and the tunnelling probability are obtained,which are verified by numerical methods.It is shown that the eigenstates and the tunnelling probability are modified dramatically by three-body interaction.
Effect of three-body forces on the lattice dynamics of noble metals
Indian Academy of Sciences (India)
P R Vyas; C V Pandya; T C Pandya; V B Gohel
2001-04-01
A simple method to generate an effective electron–ion interaction pseudopotential from the energy wave number characteristic obtained by ﬁrst principles calculations has been suggested. This effective potential has been used, in third order perturbation, to study the effect of three-body forces on the lattice dynamics of noble metals. It is found that three-body forces, in these metals, do play an important role. The inclusion of such three-body forces appreciably improves the agreement between the experimental and theoretical phonon dispersion curves.
Folding model analysis of Λ binding energies and three-body ΛNN force
International Nuclear Information System (INIS)
Working within the framework of the folding model, we analyze the Λ binding energy data of light hypernuclei with effective two-body ΛN plus three-body ΛNN interaction. The two-body density for the core nucleus required for evaluating the three-body force contribution is obtained in terms of the centre of mass pair correlation. It is found that except for Λ5He the data are fairly well explained. The three-body force seems to account for the density dependence of the effective two-body ΛN interaction proposed earlier. (author). 13 refs, 2 tabs
Zotos, Euaggelos E.
2015-08-01
We numerically investigate the case of the planar circular restricted three-body problem where the more massive primary is an oblate spheroid. A thorough numerical analysis takes place in the configuration and the space in which we classify initial conditions of orbits into three categories: (i) bounded, (ii) escaping and (iii) collisional. Our results reveal that the oblateness coefficient has a huge impact on the character of orbits. Interpreting the collisional motion as leaking in the phase space we related our results to both chaotic scattering and the theory of leaking Hamiltonian systems. We successfully located the escape as well as the collisional basins and we managed to correlate them with the corresponding escape and collision times. We hope our contribution to be useful for a further understanding of the escape and collision properties of motion in this interesting version of the restricted three-body problem.
Zotos, Euaggelos E
2015-01-01
We numerically investigate the case of the planar circular restricted three-body problem where the more massive primary is an oblate spheroid. A thorough numerical analysis takes place in the configuration $(x,y)$ and the $(x,E)$ space in which we classify initial conditions of orbits into three categories: (i) bounded, (ii) escaping and (iii) collisional. Our results reveal that the oblateness coefficient has a huge impact on the character of orbits. Interpreting the collisional motion as leaking in the phase space we related our results to both chaotic scattering and the theory of leaking Hamiltonian systems. We successfully located the escape as well as the collisional basins and we managed to correlate them with the corresponding escape and collision times. We hope our contribution to be useful for a further understanding of the escape and collision properties of motion in this interesting version of the restricted three-body problem.
Zotos, Euaggelos E
2015-01-01
The case of the planar circular photogravitational restricted three-body problem where the more massive primary is an emitter of radiation is numerically investigated. A thorough numerical analysis takes place in the configuration $(x,y)$ and the $(x,C)$ space in which we classify initial conditions of orbits into three main categories: (i) bounded, (ii) escaping and (iii) collisional. Our results reveal that the radiation pressure factor has a huge impact on the character of orbits. Interpreting the collisional motion as leaking in the phase space we related our results to both chaotic scattering and the theory of leaking Hamiltonian systems. We successfully located the escape as well as the collisional basins and we managed to correlate them with the corresponding escape and collision times. We hope our contribution to be useful for a further understanding of the escape and collision properties of motion in this interesting version of the restricted three-body problem.
Research on Battery Charging-Discharging in New Energy Systems
Directory of Open Access Journals (Sweden)
Che Yanbo
2013-07-01
Full Text Available As an energy storage component, the battery plays increasingly important role in new energy industry. Charging and discharging system is the vital part of the application of the battery, but the charge and discharge are always designed separately and carried by different part in the traditional application. Additionally, most battery discharge mode and method are always simplified which cannot ensure to meet the demand of power utilization. In the actual energy storage system, the design of the energy converter, which make the power storage and supply as a whole and the design of the charge and discharge method, will play an important role in efficient utilization of the battery system. As a part of the new energy system, the study makes battery and the charging and discharging system as a whole to store energy, which can store and release electric energy high efficiently according to the system state and control the bidirectional flow of energy precisely. Using TMS320F2812 as the control core, the system which integrates charging and discharging with battery monitoring can achieve the bidirectional Buck/Boost power control. It can achieve three-stage charging and selective discharging of the battery. Due to the influence of the diode reverse recovery time, current oscillation will appear. In order to eliminate the oscillation, we can set the circuit to work in critical conduction mode. The experimental result shows that the system can achieve the charging and discharging control of lead-acid battery and increase the battery life time further.
International Nuclear Information System (INIS)
The time-transformed leapfrog scheme of Mikkola and Aarseth was specifically designed for a second-order differential equation with two individually separable forms of positions and velocities. It can have good numerical accuracy for extremely close two-body encounters in gravitating few-body systems with large mass ratios, but the non-time-transformed one does not work well. Following this idea, we develop a new explicit symplectic integrator with an adaptive time step that can be applied to a time-dependent Hamiltonian. Our method relies on a time step function having two distinct but equivalent forms and on the inclusion of two pairs of new canonical conjugate variables in the extended phase space. In addition, the Hamiltonian must be modified to be a new time-transformed Hamiltonian with three integrable parts. When this method is applied to the elliptic restricted three-body problem, its numerical precision is explicitly higher by several orders of magnitude than the nonadaptive one's, and its numerical stability is also better. In particular, it can eliminate the overestimation of Lyapunov exponents and suppress the spurious rapid growth of fast Lyapunov indicators for high-eccentricity orbits of a massless third body. The present technique will be useful for conservative systems including N-body problems in the Jacobian coordinates in the the field of solar system dynamics, and nonconservative systems such as a time-dependent barred galaxy model in a rotating coordinate system
Indian Academy of Sciences (India)
S Kumar; V S Bhasin
2004-09-01
The ground state wave function of 11Li obtained in a three-body model proposed earlier (S Kumar and V S Bhasin, Phys. Rev. C65, 034007 (2002)) has been employed to study the probability distributions, momentum distributions and n–n correlation. Complex scaling method has been used to find the energy positions and widths of the three resonant states of 11Li above the breakup threshold. The formalism is extended further to study the -decay of 11Li to two channels. One is the -transition of 11Li into a high lying excited state of 11Be at 18.3 MeV, i.e., 11Be* and the second is the decay to deuteron + 9Li channel. The 11Be* state has been considered as a halo analog state identified as a bound three-body (9Li + n + p) system. The n- 9Li interaction in-corporates both the virtual state and the p-wave resonance observed experimentally. For p- 9Li interaction, a Coulomb corrected separable interaction is constructed using charge indepedendence for strong interaction part. The n–p interaction is operative only in 3S1 state corresponding to the isotopic spin h = 0. As a result the 11Be* state has the same isotopic spin as that of 9Li core, i.e., = 3/2. Using these realistic parameters as input and without invoking any other free parameter, the model has been used to predict the strength of the Gamow–Teller -decay of 11Li to 11Be* , i.e., GT = 1.5 and the value of the branching ratio to 9Li + deuteron channel to be 1.3 × 10−4. These results are found to be in rather good agreement with the recent experimental findings.
Photoinduced phase transition in charge order systems. Charge frustration and interplay with lattice
International Nuclear Information System (INIS)
Lattice effects on photoexcited states in an interacting charge-frustrated system are examined. Real-time dynamics in the interacting spinless fermion model on a triangular lattice coupled to lattice vibration are analyzed by applying the exact diagonalization method combined with the classical equation of motion. A photoinduced phase transition from the horizontal stripe-type charge order (CO) to the 3-fold CO occurs through a characteristic intermediate time domain. By analyzing the time evolution in detail, we find that these characteristic dynamics are seen when the electron and lattice sectors are not complementary to each other but show cooperative time evolutions. The dynamics are distinct from those from the vertical stripe-type CO, in which a monotonic CO melting occurs. A scenario of the photoinduced CO phase transition with lattice degree of freedom is presented from the viewpoint of charge frustration. (author)
Charging reactive power considering system security aspects
International Nuclear Information System (INIS)
The pricing of reactive power in power systems was discussed. This issue does not draw much attention because reactive power typically responds to only a small share of the total market power. The challenge in system security arises when the reactive power market is considered as an auxiliary tool to improve the voltage level profile and the reactive power control is considered to obtain a larger load margin. In such cases, for each transaction, the responsibility of the reactive power changes are determined along with some control actions to reduce the system loss in the critical area, and to increase the load margin. This paper also presented a new approach for pricing these control actions and outlined some system configurations and operating conditions. Tests were performed using a real 39-bus system sample in which all limits were considered.
Microscopic Three-Body Force Effect on Nucleon-Nucleon Cross Sections in Symmetric Nuclear Matter
Institute of Scientific and Technical Information of China (English)
ZHANG Hong-Fei; ZUO Wei; Lombardo Umberto; LI Zeng-Hua; LI Jun-Qing
2008-01-01
We provide a microscopic calculation of neutron-proton and proton-proton cross sections in symmetric nuclear matter at various densities, using the Brueckner-Hartree-Fock approximation scheme with the Argonne V14 potential including the contribution of microscopic three-body force. We investigate separately the effects of three-body force on the effective mass and on the scattering amplitude. In the present calculation, the rearrangement contribution of three-body force is considered, which will reduce the neutron and proton effective mass, and depress the amplitude of cross section. The effect of three body force is shown to be repulsive, especially in high densities and large momenta, which will suppress the cross section markedly.
Comparison of classical and quantal calculations of helium three-body recombination
Pérez-Ríos, Jesús; Wang, Jia; Greene, Chris H
2013-01-01
A general method to study classical scattering in $n$-dimension is developed. Through classical trajectory calculations, the three-body recombination is computed as a function of the collision energy for helium atoms, as an example. Quantum calculations are also performed for the $J^{\\Pi}$ = $0^{+}$ symmetry of the three-body recombination rate in order to compare with the classical results, yielding good agreement for $E\\gtrsim$ 1 K. The classical threshold law is derived and numerically confirmed for the Newtonian three-body recombination rate. Finally, a relationship is found between the quantum and classical three-body hard hypersphere elastic cross sections which is analogous to the well-known shadow scattering in two-body collisions.
Adiabatic hyperspherical representation for the three-body problem in two dimensions
D'Incao, J. P.; Esry, B. D.
2014-10-01
We explore the three-body problem in two dimensions using the adiabatic hyperspherical representation. We develop the main equations in terms of democratic hyperangular coordinates and determine several symmetry properties and boundary conditions for both interacting and noninteracting solutions. From the analysis of the three-body effective potentials, we determine the threshold laws for low-energy three-body recombination, collision-induced dissociation, as well as inelastic atom-diatom collisions in two dimensions. Our results show that the hyperspherical representation can offer a simple and conceptually clear physical picture for three-body process in two dimensions which is also suitable for calculations using finite-range two-body interactions supporting a number of bound states.
Fan, Yameng; Wu, Chengyin; Xie, Xiguo; Wang, Peng; Zhong, Xunqi; Shao, Yun; Sun, Xufei; Liu, Yunquan; Gong, Qihuang
2016-06-01
We experimentally studied three-body fragmentation dynamics of (CO2)23+ generated by intense femtosecond laser fields. Three-dimensional momentum vectors as well as kinetic energies were measured for correlated fragmental ions using the technology of coincidence measurement. The results demonstrate that sequential fragmentation channel dominates for three-body fragmentation of (CO2)23+, in which the weak van der Waals bond breaks first and then one strong covalent bond.
Electric mobility and charging: systems of systems and infrastructure systems
Bonnema, G. Maarten; Muller, Gerrit; Schuddeboom, Lisette
2015-01-01
In light of European and worldwide environmental programs, reduction of CO2 emissions and improvements in air quality receive a lot of attention. A prominent way to improve on both aspects is the replacement of Internal Combustion Engine Vehicles with Electrical Vehicles. Yet, simply replacing vehicles will not result in proper electric mobility because using Electrical Vehicles depends on many systems and infrastructures including the chargers, parking sites and payment structures. In this p...
The search for competing charge orders in frustrated ladder systems
International Nuclear Information System (INIS)
A recent study revealed the dynamics of the charge sector of a one-dimensional quarter- filled electronic system with extended Hubbard interactions to be that of an effective pseudospin transverse-field Ising model (TFIM) in the strong coupling limit. With the twin motivations of studying the co-existing charge and spin order found in strongly correlated chain systems and the effects of inter-chain couplings, we investigate the phase diagram of coupled effective (TFIM) systems. A bosonisation and RG analysis for a two-leg TFIM ladder yields a rich phase diagram showing Wigner/Peierls charge order and Neel/dimer spin order. In a broad parameter regime, the orbital antiferromagnetic phase is found to be stable. An intermediate gapless phase of finite width is found to lie in between two charge-ordered gapped phases. Kosterlitz-Thouless transitions are found to lead from the gapless phase to either of the charge-ordered phases. Low energy effective Hamiltonian analyses of a strongly coupled 2-chain ladder system confirm a phase diagram with in-chain CO, rung-dimer, and orbital antiferromagnetic ordered phases with varying interchain couplings as well as superconductivity upon hole-doping. Our work is potentially relevant for a unified description of a class of strongly correlated, quarter-filled chain and ladder systems. (autor)
Multidimensional and three-body inverse scattering problems in the adiabatic representation
International Nuclear Information System (INIS)
In the adiabatic representation, the multidimensional and three-body inverse scattering problems are discussed on the basis of consistent formulation of both the multichannel inverse problem for gauge systems of equations describing ''slow'' dynamics of the system, and the parametric one for ''fast'' dynamics. The method of constructing a wide class of exactly solvable multidimensional models is investigated by comparing the Bargmann potentials with the parametric family of inverse problems and systems of equations with covariant derivatives. A problem introducing an extra matrix of scalar potentials so as to conserve supersymmetry and thus conditions for topological effects is studied. A direct generalization of the Witten supersymmetric quantum mechanics for gauge equations with additional scalar potentials is given. Coupling of supersymmetry and geometric phases and the influence of additional scalar potentials under the degeneracy of the ground state, and as a result under topological effects, are discussed. Algebraic Bargmann and Darboux transformations for equations of a more general form than the Schroedinger ones with an additional functional dependence (h(r)) in the right-hand side of equations are constructed. (orig.)
Yamada, Kei; Asada, Hideki
2016-04-01
Continuing work initiated in an earlier publication [H. Asada, Phys. Rev. D 80, 064021 (2009)], the gravitational radiation reaction to Lagrange's equilateral triangular solution of the three-body problem is investigated in an analytic method. The previous work is based on the energy balance argument, which is sufficient for a two-body system because the number of degrees of freedom (the semimajor axis and the eccentricity in quasi-Keplerian cases, for instance) equals that of the constants of motion such as the total energy and the orbital angular momentum. In a system with three (or more) bodies, however, the number of degrees of freedom is more than that of the constants of motion. Therefore, the present paper discusses the evolution of the triangular system by directly treating the gravitational radiation reaction force to each body. The perturbed equations of motion are solved by using the Laplace transform technique. It is found that the triangular configuration is adiabatically shrinking and is kept in equilibrium by increasing the orbital frequency due to the radiation reaction if the mass ratios satisfy the Newtonian stability condition. Long-term stability involving the first post-Newtonian corrections is also discussed.
Stability domain of systems of three arbitrary charges
International Nuclear Information System (INIS)
We present results on the stability of quantum systems consisting of a negative charge -q1 with mass m1 and two positive charges q2 and q3, with masses m2 and m3, respectively. We show that, for given masses mi, each instability domain is convex in the plane of the variables (q1/q2, q1/q3). A new proof is given of the instability of muonic ions (α, p, μ-). We then study stability in some critical regimes where q3 2: stability is sometimes restricted to large values of some mass ratios; the behavior of the stability frontier is established to leading order in q3/q2. Finally we present some conjectures about the shape of the stability domain, both for given masses and varying charges, and for given charges and varying masses. Refs. 19 (author)
Determination of a Vapor Compression Refrigeration System Refrigerant Charge
Institute of Scientific and Technical Information of China (English)
YangChun－Xin; DangChao－Bin
1995-01-01
A physical model is established in this paper to describe the heat transfer and two phase flow of a refrigerant in the evaporator and condenser of a vapor compression refrigeration system.The model in then used to determine the refrigerant charge in vapor compression units.The model is used for a sensitivity analysis to determine the effect that varing design parameters on the refrigerant charge,The model is also used to evaluate the effect of refrigerant charge and the thermal physical properties on the refrigeration cycle,The predicted value of the refigerant charge and experimental data agree well The model and the method presented in this paper could be used to design vapour compression units such as domestic refrigeratirs and air conditioners.
A belt charging system for the Vivitron - design, early results
International Nuclear Information System (INIS)
A specific belt charging system has been designed, built and assembled for the 35 MV Vivitron. 100 m long belt is used. Together with main features of the design, experimental studies, tests in a pilot machine and the results of the very early tests of the real system are reviewed
First results with the charging system of the Vivitron
International Nuclear Information System (INIS)
An original, Van de Graaff type, belt charging system has been designed, built and assembled for the Vivitron, a 35 MV Tandem accelerator. Together with a detailed description of it, experimental studies, tests in a pilot machine and the results of the very first tests of the real system are reviewed
D+ → K- pi+pi+: three body final state interaction
International Nuclear Information System (INIS)
Full text: Even with the important advances of the last decade, the charmed meson decays are still poorly understood theoretically. We do not understand, for instance, why the kappa scalar resonance is responsible for about 70% of the fit in the decay D+ → K- pi+pi+ , as observed by the E791 collaboration (2002) and confirmed by several others. The fact that quark c can not be considered neither soft nor heavy means that there are no approximation schemes to treat D decays. With the LHCb, we will have high statistic data about D and B decays. This scenario suggest that it is important to develop more precise theoretical models which that could be useful in the experimental analyses. Literature available at present treat the three body decay final state interaction (FSI) as a two-body interaction plus a spectator. However, if the FSI behaved as a (2+1) system, we would find K pi phases on the experimental data of D+ → K- pi+pi+, as announced in Watson theorem, but this does not happen. This indicates a lack of knowledge about the 3-body decay in two different directions. The first one concerns the weak vertex, still not suitably treated in literature. The second one is to include proper three body pseudoscalar FSIs. This work discusses the relevance of 3 body FSI in the D+ → K- pi+pi+ using a model based on Chiral perturbation theory (ChPT)a. Following the idea that pi+pi+ interaction are suppressed, we assume that K interacts with one pion at a time. The perturbative solution of this decay includes adding diagrams with different numbers of loops. The first diagram represent the partonic decay. The second, is a one loop interaction between K pi, which is the main diagram of those theories that consider (2 + 1) system. The third one is a two loop interaction, where the second loop is between the kaon and the first spectator pion. We calculate this three first diagrams and quantify the relative importance of then in the D+ → K- pi+pi+ amplitude. The analyses
Charging systems and PAYT experiences for waste management in Spain.
Puig-Ventosa, I
2008-12-01
Municipal waste charges in Spain are very widespread, although their application varies significantly among different municipalities. Most commonly, waste charges are implemented as a flat rate, but some of them depend on indicators such as household water consumption, the land area of the property or the value of the real estate. Only one residential pay-as-you-throw scheme has been applied so far. It was a pay-per-bag scheme implemented in Torrelles de Llobregat, Barcelona. A number of other systems focussing only on commercial waste have been implemented in Spain. Several factors suggest that new pay-as-you-throw schemes will be adopted in the near future. In 2000 no municipalities had door-to-door collection schemes; since then over 70 municipalities have implemented them. In addition to this, some regions encourage the separate collection of commercial waste, by means of doorstep schemes. In all of these areas, variable charging systems could be easily adopted. Additionally, regarding waste charges, the National Waste Plan (2000-2006) advocated for the implementation of "pilot experiences for the quantitative application of the polluter-pays-principle". The tendency towards these variable charging systems in Europe will also favour their introduction in Spain. PMID:18783932
Optimal charge control strategies for stationary photovoltaic battery systems
Li, Jiahao; Danzer, Michael A.
2014-07-01
Battery systems coupled to photovoltaic (PV) modules for example fulfill one major function: they locally decouple PV generation and consumption of electrical power leading to two major effects. First, they reduce the grid load, especially at peak times and therewith reduce the necessity of a network expansion. And second, they increase the self-consumption in households and therewith help to reduce energy expenses. For the management of PV batteries charge control strategies need to be developed to reach the goals of both the distribution system operators and the local power producer. In this work optimal control strategies regarding various optimization goals are developed on the basis of the predicted household loads and PV generation profiles using the method of dynamic programming. The resulting charge curves are compared and essential differences discussed. Finally, a multi-objective optimization shows that charge control strategies can be derived that take all optimization goals into account.
High eccentricity MMRs in the circular planar restricted three-body problem
Wang, Xianyu; Malhotra, Renu
2016-05-01
Mean motion resonances [MMRs] play an important role in the evolution of the solar system and have significantly influenced the population of the minor planets. Most previous theoretical analyses of mean motion resonances have focused on the low eccentricity regime, but with new discoveries of high eccentricity resonant minor planets and even exoplanets, there is increasing motivation to examine the dynamics of MMRs in the high eccentricity regime. Here we report on a study of the high eccentricity regime of MMRs in the circular planar restricted three-body problem. Numerical analysis of several important interior and exterior resonances are performed for a wide range of secondary-to-primary mass ratio µ, and for a wide range of eccentricity of the particle. The surface of section of a vs. ψ is used to study the stable resonant regions, where a is the semi-major axis and ψ is the angle between the planet and the particle at periapse; the usual resonant argument is an integer multiple of ψ. We find that for each resonant ratio, the center and extent of stable librations of ψ changes depending upon the eccentricity and mass ratio µ. Some libration centers that are stable at lower eccentricity become unstable and chaotic at higher eccentricity. However, large new stable islands reappear at higher eccentricity, albeit at shifted libration centers. We discuss the mass and eccentricity dependence of the centers and widths of stable resonance zones.
Diffusion along mean motion resonance in the restricted planar three-body problem
Fejoz, Jacques; Kaloshin, Vadim; Roldan, Pablo
2011-01-01
We study the dynamics of the restricted planar three-body problem near a mean motion resonance, i.e. a resonance involving the Keplerian periods of the two lighter bodies revolving around the most massive one. This problem is often used to model Sun-Jupiter-asteroid systems. For the primaries (Sun and Jupiter), we pick a realistic mass ratio $\\mu=10^{-3}$ and a small eccentricity $e_0>0$. The main result is a construction of a variety of diffusing orbits which show a drastic change of the osculating eccentricity of the asteroid, while the osculating semi major axis is kept almost constant. The proof relies on the careful analysis of the circular problem, which has a hyperbolic structure, but for which diffusion is prevented by KAM tori. In the proof we verify certain non-degeneracy conditions numerically. Based on the work of Treschev, we conjecture that the time of diffusion for this problem is at least $\\sim -\\ln(\\mu e_0)/(\\mu^{3/2}e_0)$. We expect our instability mechanism to apply to realistic values of $...
Three-body correlations in the decay of $^{10}$He and $^{13}$Li
Jonson, B; Cortina-Gil, D; Simon, H; Emling, H; Nyman, G; Nilsson, T; Johansson, H T; Borge, M J G; Paschalis, S; Muenzenberg, G; Zhukov, M V; Weick, H; Pramanik, U Datta; LeBleis, T; Meister, M; Reifarth, R; Chulkov, L V; Lantz, M; Riisager, K; Mahata, K; Suemmerer, K; Langer, C; Chatillon, A; Richter, A; Kulessa, R; Palit, R; Aksyutina, Yu; Geissel, H; Aumann, T; Shulgina, N B; Prokopowicz, W; Forssen, C; Ickert, G; Fynbo, H O U; Tengblad, O; Boretzky, K
2010-01-01
The very exotic nuclear resonance systems. He-10 and Li-13, are produced in proton-knockout reactions from relativistic beams of Li-11 and Be-14. The experimentally determined energy and angular correlations between their decay products, He-8 + n + n and Li-11 + n + n, are analyzed using an expansion of decay amplitudes in a restricted set of hyperspherical harmonics. By considering only a small number of terms it is possible to extract the expansion coefficients directly from the experimental three-body correlations. This provides a model-independent way of getting information about the decay process. on the structure of the decaying nucleus and on the quantum characteristics of the binary subsystems The results show that the He-8 + n + n relative-energy spectrum can be interpreted as consisting of two resonances, an I-pi = 0(+) ground state and an excited I-pi = 2(+) state. The Li-11 + n + n relative-energy spectrum is interpreted as an I-pi = 3/2(-) ground state overlapping with excited states having a str...
Study of charmless three-body decays of neutral B mesons with the LHCb spectrometer
Sobczak, Krzysztof Grzegorz
This thesis describes an exploratory work on three-body charmless neutral $B$ mesons decays containing either a $K_S$ or $\\pi^0$. The events are reconstructed with the LHCb spectrometer installed at Cern (Geneva, CH) recording the proton-proton collisions delivered by the Large Hadron Collider (LHC). The phenomenology of such modes is rich and covers the possibility to measure all angles of the unitarity triangle linked to the Cabibbo-Kobayashi-Maskawa (CKM) matrix. The single example of the $\\gamma$ measurement is explored in this document. The LHC accelerator and the most relevant sub-detector elements of the LHCb spectrometer are described in details. In particular, emphasis is given to the calorimetry system for which the calibration and alignment of the PreShower (PRS) of the electromagnetic calorimeter has been performed. We used particles at minimum ionisation deposit for such a task. The calibration results until year 2011 are reported as well as the method of the PS alignment with respect to the tra...
L^1 -optimality conditions for the circular restricted three-body problem
Chen, Zheng
2016-06-01
In this paper, the L^1 -minimization for the translational motion of a spacecraft in the circular restricted three-body problem (CRTBP) is considered. Necessary conditions are derived by using the Pontryagin Maximum Principle (PMP), revealing the existence of bang-bang and singular controls. Singular extremals are analyzed, recalling the existence of the Fuller phenomenon according to the theories developed in (Marchal in J Optim Theory Appl 11(5):441-486, 1973; Zelikin and Borisov in Theory of Chattering Control with Applications to Astronautics, Robotics, Economics, and Engineering. Birkhäuser, Basal 1994; in J Math Sci 114(3):1227-1344, 2003). The sufficient optimality conditions for the L^1 -minimization problem with fixed endpoints have been developed in (Chen et al. in SIAM J Control Optim 54(3):1245-1265, 2016). In the current paper, we establish second-order conditions for optimal control problems with more general final conditions defined by a smooth submanifold target. In addition, the numerical implementation to check these optimality conditions is given. Finally, approximating the Earth-Moon-Spacecraft system by the CRTBP, an L^1 -minimization trajectory for the translational motion of a spacecraft is computed by combining a shooting method with a continuation method in (Caillau et al. in Celest Mech Dyn Astron 114:137-150, 2012; Caillau and Daoud in SIAM J Control Optim 50(6):3178-3202, 2012). The local optimality of the computed trajectory is asserted thanks to the second-order optimality conditions developed.
Integration between electric vehicle charging and micro-cogeneration system
International Nuclear Information System (INIS)
Highlights: • The interaction between an MCHP system and EV charging is investigated. • A parametric analysis with respect to daily driving distance of the EV is performed. • Dynamic simulations are carried out considering two different climates. • Two EV charging strategies are analyzed to maximize the self-consumed electricity. • The impact of EVs on electric grid and economic feasibility of MCHP can be improved. - Abstract: In the near future the diffusion of plug-in electric vehicles (EVs) could play an important role in the reduction of emissions and oil dependency associated with the transport sector. However this technology could have a big impact on the electric network because EVs require a considerable amount of electricity. In order to meet the growing load due to the diffusion of EVs, the construction of new infrastructures will be required. The introduction of micro-cogeneration systems could represent a key factor in the reduction of the negative effects on the electric network related to EVs charging. The EVs are often driven during the day and recharged during the night; so the overnight charge of the EVs allows to reduce the amount of electricity exported to the grid. In this way the economic benefits associated with the introduction of micro-cogenerator system (Micro Combined Heat and Power, MCHP), that depend on the economic value of the “produced” electricity, can be improved. At the same time the impact of EVs charge on the electric network can be reduced when electricity is provided by MCHP. In this paper the interaction between an MCHP system, the EV charging and a typical semidetached house is investigated by means of dynamic simulations. The analysis is carried out in two different locations (Torino and Napoli) in order to evaluate the effects of climatic conditions on the system performance. A parametric analysis with respect to the daily driving distance of the EV is carried out in order to highlight the effect of this
Libration point orbits near small bodies in the elliptic restricted three-body problem
Mahajan, Bharat
In this study, the feasibility of using libration point orbits to explore small solar system bodies, including asteroids and comets, is considered. A novel design for a small body mission is proposed that makes use of libration point orbits as "parking" orbits. In considering a human exploration mission to asteroids or comets, these "parking" orbits may provide benefits including a safe vantage point for staging/observation, reduced perturbation effects from the nonuniform gravitational field of the body, fewer communication blackouts, ease of guidance and control of a lander on the surface, etc. Because small solar system bodies have extremely low mass ratios in the Sun-small body system, the existence of periodic orbits about the collinear libration points at a safe distance from the smaller primary was uncertain and is demonstrated for a range of small bodies. A two-level differential corrector along with periodicity constraints is proposed for use in computing periodic orbits in the vicinity of the small bodies with significant eccentricity in the Elliptic Restricted Three-Body Problem. Using this method, halo-like orbits are computed in the Sun-433 Eros and Sun-4 Vesta systems. The stability of these orbits is analyzed using Floquet theory. To overcome the effects of perturbations in these unstable orbits, a robust nonlinear station-keeping controller based on sliding mode control theory is proposed. The controller performance is validated in the presence of third-body perturbations from Jupiter, solar radiation pressure perturbations, tracking errors, orbit insertion errors and maneuver burn errors in the Sun-433 Eros and Sun- 4 Vesta systems. Simulation results are presented that show that the small body missions can be designed using libration point orbits with feasible station-keeping costs.
Electric vehicle system for charging and supplying electrical power
Su, Gui Jia
2010-06-08
A power system that provides power between an energy storage device, an external charging-source/load, an onboard electrical power generator, and a vehicle drive shaft. The power system has at least one energy storage device electrically connected across a dc bus, at least one filter capacitor leg having at least one filter capacitor electrically connected across the dc bus, at least one power inverter/converter electrically connected across the dc bus, and at least one multiphase motor/generator having stator windings electrically connected at one end to form a neutral point and electrically connected on the other end to one of the power inverter/converters. A charging-sourcing selection socket is electrically connected to the neutral points and the external charging-source/load. At least one electronics controller is electrically connected to the charging-sourcing selection socket and at least one power inverter/converter. The switch legs in each of the inverter/converters selected by the charging-source/load socket collectively function as a single switch leg. The motor/generators function as an inductor.
Three-body decays of Higgs bosons at LEP2 and application to a hidden fermiophobic Higgs
Akeroyd, A G
1999-01-01
We study the decays of Higgs bosons to a lighter Higgs boson and a virtual gauge boson in the context of the non-supersymmetric Two-Higgs-Doublet-Model (2HDM). We consider the phenomenological impact at LEP2 and find that such decays, when open, may be dominant in regions of parameter space and thus affect current Higgs boson search techniques. Three-body decays would be a way of producing light neutral Higgs bosons which have so far escaped detection at LEP due to suppressed couplings to the Z, and are of particular importance in the 2HDM (Model I) which allows both a light fermiophobic Higgs and a light charged scalar.
International Nuclear Information System (INIS)
Three-body Coulomb explosion of formaldehyde (H2CO) in intense 7- and 35-fs laser fields (1.3 × 1015 W/cm2) has been investigated by using ion-coincidence momentum imaging technique. Two types of explosion pathways from the triply charged state, H2CO3+ → (i) H+ + H+ + CO+ and (ii) H+ + CH+ + O+, have been identified. It is shown from the momentum correlation of the fragment ions of pathway (i), that the geometrical structure of the molecule is essentially frozen along the H-C-H bending coordinate for the 7-fs case. On the other hand, for a longer pulse duration (35 fs), structural deformation along the C-H stretching and H-C-H bending coordinates is identified, which is ascribed to the nuclear dynamics in the dication states populated within the laser pulse duration
Belt charging system for the 35 MV Vivitron accelerator
International Nuclear Information System (INIS)
A Van de Graaff belt charging system has been chosen for the Vivitron. Although classical in its principle and conservative in its design, it includes different new features that will be discussed in detail. The main electrical and mechanical characteristics are also reviewed together with the status of the project
Space charge effects in a bending magnet system
International Nuclear Information System (INIS)
In order to examine problems and phenomena associated with space charge in a beam bending system, the beam dynamics code HICURB has been written. Its principal features include momentum variations, vertical and horizontal envelope dynamics coupled to the off-axis centroid, curvature effect on fields, and images. Preliminary results for an achromatic lattice configuration are presented
Three-Body Continuum Wave Functions with a Box Boundary Condition
International Nuclear Information System (INIS)
In this work we investigate the connection between discretized three-body continuum wave functions, in particular via a box boundary condition, and the wave functions computed with the correct asymptotics. The three-body wave functions are in both cases obtained by means of the adiabatic expansion method. The information concerning all the possible incoming and outgoing channels, which appears naturally when the continuum is not discretized, seems to be lost when the discretization is implemented. In this work we show that both methods are fully equivalent, and the full information contained in the three-body wave function is actually preserved in the discrete spectrum. Therefore, in those cases when the asymptotic behaviour is not known analytically, i.e., when the Coulomb interaction is involved, the discretization technique can be safely used. (author)
A cluster expansion for bound three-alpha particles as a three-body problem
International Nuclear Information System (INIS)
A three-body model is proposed to study the nuclear bound states. The nucleus is described as a bound state of three clusters. A cluster expansion is introduced for the three cluster bound state problem. The present integral equations are treated by simple approximate solutions, which lead to effective potentials by using the present cluster expansion. The 12C nucleus is described as a three-alpha particle bound state. The binding energy of 12C is calculated numerically using the present cluster expansion as bound three-alpha clusters. The present three-body cluster expansion calculations are very near to the exact three-body calculations using separable potentials. The present theoretical calculations are in good agreement with the experimental measurements. (author)
Three-body forces for electrons by the S-matrix method
International Nuclear Information System (INIS)
A electromagnetic three-body potential between eletrons is derived by the S-matrix method. This potential can be compared up to a certain point with other electromagnetic potentials (obtained by other methods) encountered in the literature. However, since the potential derived here is far more complete than others, this turns direct comparison with the potentials found in the literature somewhat difficult. These calculations allow a better understanding of the S-matrix method as applied to problems which involve the calculations of three-body nuclear forces (these calculations are performed in order to understand the 3He form factor). Furthermore, these results enable us to decide between two discrepant works which derive the two-pion exchange three-body potential, both by the S-matrix method. (author)
Effects of three-body interaction on collective excitation and stability of Bose–Einstein condensate
International Nuclear Information System (INIS)
This paper investigates the collective excitation and stability of low-dimensional Bose–Einstein condensates with two- and three-body interactions by the variational analysis of the time-dependent Gross–Pitaevskii–Ginzburg equation. The spectrum of the low-energy excitation and the effective potential for the width of the condensate are obtained. The results show that: (i) the repulsive two-body interaction among atoms makes the frequency red-shifted for the internal excitation and the repulsive or attractive three-body interaction always makes it blue-shifted; (ii) the region for the existence of the stable bound states is obtained by identifying the critical value of the two- and three-body interactions. (general)
Mechanical and three-body abrasive wear behaviour of PMMA/TPU blends
International Nuclear Information System (INIS)
The blends of poly(methyl methacrlate) (PMMA) and thermoplastic polyurethane (TPU) were prepared by a Brabender co-twin screw extruder. The mechanical and three-body abrasive wear behaviour of PMMA/TPU blends has been studied. Three-body abrasive wear tests were conducted using rubber wheel abrasion tester (RWAT) under different abrading distances at 200 rpm and 22 N load. A significant reduction in tensile strength and tensile modulus with an increase in TPU content in the blend formulation was observed. Three-body abrasive wear results indicate that the wear volume increases with increase in abrading distance for all the samples studied. However, neat PMMA showed better wear resistance as compared to PMMA/TPU blends. The worn surface features, as examined through scanning electron microscope (SEM), show matrix cracking and deep furrows in PMMA/TPU blends
Institute of Scientific and Technical Information of China (English)
2008-01-01
Three-body interaction plays an important role in many-body physics,and quantum computer is efficient in simulating many-body interactions. We have experimentally demonstrated the general three-body interactions in a three-qubit nuclear magnetic resonance ensemble quantum computer. Using a nuclear magnetic resonance computer we implemented general forms of three-body interactions including σ 1x σ z2 σ x3 and σ 1x σ z2 σ y3 . The results show good agreement between theory and experiment. We have also given a concise and practical formula for a general n-body interaction in terms of one-and two-body interactions.
Three-body continuum wave functions with a box boundary condition
Garrido, E
2015-01-01
In this work we investigate the connection between discretized three-body continuum wave functions, in particular via a box boundary condition, and the wave functions computed with the correct asymptotics. The three-body wave functions are in both cases obtained by means of the adiabatic expansion method. The information concerning all the possible incoming and outgoing channels, which appears naturally when the continuum is not discretized, seems to be lost when the discretization is implemented. In this work we show that both methods are fully equivalent, and the full information contained in the three-body wave function is actually preserved in the discrete spectrum. Therefore, in those cases when the asymptotic behaviour is not known analytically, i.e., when the Coulomb interaction is involved, the discretization technique can be safely used.
Deep Charging Evaluation of Satellite Power and Communication System Components
Schneider, T. A.; Vaughn, J. A.; Chu, B.; Wong, F.; Gardiner, G.; Wright, K. H.; Phillips, B.
2016-01-01
A set of deep charging tests has been carried out by NASA's Marshall Space Flight Center on subscale flight-like samples developed by Space Systems/Loral, LLC. The samples, which included solar array wire coupons, a photovoltaic cell coupon, and a coaxial microwave transmission cable, were placed in passive and active (powered) circuit configurations and exposed to electron radiation. The energy of the electron radiation was chosen to deeply penetrate insulating (dielectric) materials on each sample. Each circuit configuration was monitored to determine if potentially damaging electrostatic discharge events (arcs) were developed on the coupon as a result of deep charging. The motivation for the test, along with charging levels, experimental setup, sample details, and results will be discussed.
Spontaneous Charge Carrier Localization in Extended One-Dimensional Systems
Vlček, Vojtěch; Eisenberg, Helen R.; Steinle-Neumann, Gerd; Neuhauser, Daniel; Rabani, Eran; Baer, Roi
2016-05-01
Charge carrier localization in extended atomic systems has been described previously as being driven by disorder, point defects, or distortions of the ionic lattice. Here we show for the first time by means of first-principles computations that charge carriers can spontaneously localize due to a purely electronic effect in otherwise perfectly ordered structures. Optimally tuned range-separated density functional theory and many-body perturbation calculations within the G W approximation reveal that in trans-polyacetylene and polythiophene the hole density localizes on a length scale of several nanometers. This is due to exchange-induced translational symmetry breaking of the charge density. Ionization potentials, optical absorption peaks, excitonic binding energies, and the optimally tuned range parameter itself all become independent of polymer length as it exceeds the critical localization length. Moreover, we find that lattice disorder and the formation of a polaron result from the charge localization in contrast to the traditional view that lattice distortions precede charge localization. Our results can explain experimental findings that polarons in conjugated polymers form instantaneously after exposure to ultrafast light pulses.
Test of three-body contact Skyrme forces with spin excitations in deformed nuclei
International Nuclear Information System (INIS)
Experimental data on spin M1 strength distributions in even-even rare-earth nuclei are compared to theoretical results of selfconsistent HF+RPA calculations with separable spin-spin residual interactions derived from the two alternative versions (two-body density-dependent and three-body contact terms) of the Skyrme force Sk3. It is shown that the two versions produce quite different spin M1 strength distributions, though they generate the same HF mean field. The experimental data favour the two-body over the three-body version of the Skyrme interactions Sk1-Sk6. (orig.)
The co-orbital restricted three-body problem and its application
Institute of Scientific and Technical Information of China (English)
Gerhard; HEINZEL; Albrecht; RDIGER
2010-01-01
Based on large quantities of co-orbital phenomena in the motion of natural bodies and spacecraft, a model of the co-orbital restricted three-body problem is put forward. The fundamental results for the planar co-orbital circular restricted three-body problem are given, which include the selection of variables and equations of motion, a set of approximation formulas, and an approximate semi-analytical solution. They are applied to the motion of the barycenter of the planned gravitational observatory LISA constellation, which agrees very well with the solution of precise numerical integration.
Sub-Poissonian atom number fluctuations by three-body loss in mesoscopic ensembles
Whitlock, S; Spreeuw, R J C
2009-01-01
We show that three-body loss of trapped atoms leads to sub-Poissonian atom number fluctuations. We prepare hundreds of dense ultracold ensembles in an array of magnetic microtraps which undergo rapid three-body decay. The shot-to-shot fluctuations of the number of atoms per trap are sub-Poissonian, for ensembles comprising 50--300 atoms. The measured relative variance or Fano factor $F=0.53\\pm 0.22$ agrees very well with the prediction by an analytic theory ($F=3/5$) and numerical calculations. These results will facilitate studies of quantum information science with mesoscopic ensembles.
Sub-Poissonian atom-number fluctuations by three-body loss in mesoscopic ensembles.
Whitlock, S; Ockeloen, C F; Spreeuw, R J C
2010-03-26
We show that three-body loss of trapped atoms leads to sub-Poissonian atom-number fluctuations. We prepare hundreds of dense ultracold ensembles in an array of magnetic microtraps which undergo rapid three-body decay. The shot-to-shot fluctuations of the number of atoms per trap are sub-Poissonian, for ensembles comprising 50-300 atoms. The measured relative variance or Fano factor F=0.53+/-0.22 agrees very well with the prediction by an analytic theory (F=3/5) and numerical calculations. These results will facilitate studies of quantum information science with mesoscopic ensembles. PMID:20366518
Broken O(6) symmetry of IBM1 with three-body potential
International Nuclear Information System (INIS)
By introducing a three-body interaction among the d bosons into the Hamiltonian of the interacting boson model, the difficulties concerning the energy spacing between different τ and with the staggering phenomenon in the O(6) dynamical symmetry are surmounted in more or less degree. So the energy spectra of the O(6)-like nuclei are improved, and some E2 transitions which are forbidden in O(6) limit become allowed due to this three-body potential. The energy spectra and B(E2) values of some even-even nuclei are calculated. The theoretical values agree with the experimental data fairly well
Quantum Zeno suppression of three-body losses in Bose-Einstein condensates
International Nuclear Information System (INIS)
We study the possibility of suppressing three-body losses in atomic Bose-Einstein condensates via the quantum Zeno effect, which means the delay of quantum evolution by frequent measurements. It turns out that this requires very fast measurements with the rate being determined by the spatial structure of the three-body form factor, i.e., the point interaction approximation δ3(r-r') is not adequate. Since the molecular binding energy Eb provides a natural limit for the measurement rate, this suppression mechanism can only work if the form factor possesses certain special properties.
3PF2 neutron superfluidity in neutron stars and three-body force effect
Institute of Scientific and Technical Information of China (English)
Cui Chang-Xi; Zuo Wei; H.J.Schulze
2008-01-01
We investigate the 3PF2 neutron superfluidity in β-stable neutron star matter and neutron stars by using the BCS theory and the Brueckner-Hartrce-Fock approach.We adopt the Argonne V18 potential supplemented with a microscopic three-body force as the realistic nucleon-nucleon interaction.We have concentrated on studying the threebody force effect on the 3PF2 neutron pairing gap.It is found that the three-body force effect is to enhance remarkably the 3PF2 neutron superfluidity in neutron star matter and neutron stars.
Hyperchaos of two coupled Bose–Einstein condensates with a three-body interaction
International Nuclear Information System (INIS)
We investigate the dynamics of two tunnel-coupled Bose-Einstein condensates (BECs) in a double-well potential. The effects of the three-body recombination loss and the feeding of the condensates from the thermal cloud are studied in the case of attractive interatomic interaction. An imaginary three-body interaction term is considered and a two-mode approximation is used to derive three coupled equations which describe the total atomic numbers of the two condensates, the relative population and relative phase respectively. Theoretical analyses and numerical calculations demonstrate the existence of chaotic and hyperchaotic behaviour by using a periodically time-varying scattering length. (general)
Observation of Reduced Three-Body Recombination in a Fermionized 1D Bose Gas
Tolra, B. Laburthe; O'Hara, K. M.; Huckans, J. H.; Phillips, W. D.; Rolston, S. L.; Porto, J. V.
2003-01-01
We investigate correlation properties of a one-dimensional interacting Bose gas by loading a magnetically trapped 87-Rb Bose-Einstein condensate into a deep two-dimensional optical lattice. We measure the three-body recombination rate for both the BEC in the magnetic trap and the BEC loaded into the optical lattice. The recombination rate coefficient is a factor of seven smaller in the lattice, which we interpret as a reduction in the local three-body correlation function in the 1D case. This...
A remarkable periodic solution of the three-body problem in the case of equal masses
Chenciner, Alain; Montgomery, Richard
2000-01-01
Using a variational method, we exhibit a surprisingly simple periodic orbit for the newtonian problem of three equal masses in the plane. The orbit has zero angular momentum and a very rich symmetry pattern. Its most surprising feature is that the three bodies chase each other around a fixed eight-shaped curve. Setting aside collinear motions, the only other known motion along a fixed curve in the inertial plane is the ``Lagrange relative equilibrium" in which the three bodies form a rigid eq...
The effective adiabatic approximation of three-body problem with short-range potentials
International Nuclear Information System (INIS)
The effective adiabatic approximation (EAA) of three-body problem on a line with short-range attractive δ-potentials is constructed. The EAA lower bound for the energy with an absolute accuracy of order 10-6 is obtained. It is shown that EAA provides a true asymptotics of solutions and a correct behaviour of the elastic scattering phase with an absolute accuracy of 10-3 in the interval 2 · 10-3 m < π / 6 of the relative momentum below the three-body threshold for (3 to 3) scattering. The convergence of adiabatic expansion in the framework of EAA is demonstrated
The parametric orbits and the form invariance of three-body in one-dimension
Institute of Scientific and Technical Information of China (English)
Lou Zhi-Mei
2005-01-01
In this paper, the differential equations of motion of a three-body interacting pairwise by inverse cubic forces("centrifugal potential") in addition to linear forces ("harmonical potential") are expressed in Ermakov formalism in two-dimension polar coordinates, and the Ermakov invariant is obtained. By rescaling of the time variable and the space coordinates, the parametric orbits of the three bodies are expressed in terms of relative energy H1 and Ermakov invariant. The form invariance of the transformations of two conserved quantities are also studied.
Optimizing interactive program for charged particle transport system design
International Nuclear Information System (INIS)
A computer program for charged particle transport system design is described. The program is written in the BASIC language and allows one to make calculations in dialogue with the computer. The BASTRA program permits to get output information both in digital and in graphical forms. The method for optimization is described, that allows one to put 10 limitation on beam parameters in arbitrary places of the transport system. The program can be adapted on every computer having the BASIC language in its software
40 CFR 35.929-2 - General requirements for all user charge systems.
2010-07-01
... of the user charges or ad valorem taxes which are attributable to waste water treatment services. (g...-Clean Water Act § 35.929-2 General requirements for all user charge systems. User charge systems based... and maintenance of the treatment works, and its approved user charge system. The grantee shall...
Three-body break-up in deuteron-deuteron scattering at 65 MeV/nucleon
Directory of Open Access Journals (Sweden)
Stephan E.
2010-04-01
Full Text Available We successfully identiﬁed several multibody ﬁnal states in deuteron-deuteron scattering at 65 MeV/nucleon at KVI using a unique and advanced detection system called BINA. This facility enabled us to perform cross sections and polarization measurements with an improved statistical and systematic precision. The analysis procedure and a part of the results of the three-body break-up channel in the deuteron-deuteron scattering at 65 MeV/nucleon are presented.
Understanding electrostatic charge behaviour in aircraft fuel systems
Ogilvy, Jill A.; Hooker, Phil; Bennett, Darrell
2015-10-01
This paper presents work on the simulation of electrostatic charge build-up and decay in aircraft fuel systems. A model (EC-Flow) has been developed by BAE Systems under contract to Airbus, to allow the user to assess the effects of changes in design or in refuel conditions. Some of the principles behind the model are outlined. The model allows for a range of system components, including metallic and non-metallic pipes, valves, filters, junctions, bends and orifices. A purpose-built experimental rig was built at the Health and Safety Laboratory in Buxton, UK, to provide comparison data. The rig comprises a fuel delivery system, a test section where different components may be introduced into the system, and a Faraday Pail for measuring generated charge. Diagnostics include wall currents, charge densities and pressure losses. This paper shows sample results from the fitting of model predictions to measurement data and shows how analysis may be used to explain some of the observed trends.
Solar System X-rays from Charge Exchange Processes
Lisse, Carey M.; Christian, D. J.; Bhardwaj, A.; Dennerl, K.; Wolk, S. J.; Bodewits, D.; Combi, M. R.; Zurbuchen, T. H.; Lepri, S. T.
2013-04-01
The discovery of high energy x-ray emission in 1996 from comet C/1996 B2 (Hyakutake) uncovered a new class of x-ray emitting objects. Subsequent detections of the morphology, spectra, and time dependence of the x-rays from more than 20 comets have shown that the very soft (E charge-exchange interaction between highly charged solar wind minor ions and the comet's extended neutral atmosphere. Many solar system objects are now known to shine in the X-ray, including Venus, Mars, the Moon, the Earth, Jupiter, and Saturn, with total power outputs on the MW - GW scale. Like comets, the X-ray emission from the Earth's geo-corona, the Jovian & Saturnian aurorae, and the Martian halo are thought to be driven by charge exchange between highly charged minor (heavy) ions in the solar wind and gaseous neutral species in the bodies' atmosphere. The non-auroral X-ray emissions from Jupiter, Saturn, and Earth, and those from disks of Mars, Venus, and the Moon are produced by scattering of solar X-rays. The first soft X-ray observations of Earth’s aurora by Chandra shows that it is highly variable, and the giant planet aurorae are fascinating puzzles that are just beginning to yield their secrets and may be the only x-ray sources not driven directly by the Sun in the whole system as well as properties of hot exo-solar Jupiters. Observations of local solar system charge exchange processes can also help inform us about x-rays produced at more distant hot ionized gas/cold neutral gas interfaces, like the heliopause, stellar astrospheres, galactic star forming regions, and starburst galaxies.
Local realizations of contact interactions in two- and three-body problems
Kruppa, A T; Révai, J
2001-01-01
Mathematically rigorous theory of the two-body contact interaction in three dimension is reviewed. Local potential realizations of this proper contact interaction are given in terms of Poschl-Teller, exponential and square-well potentials. Three body calculation is carried out for the halo nucleus 11Li using adequately represented contact interaction.
Three-body interactions and the Landau levels using Nikiforov–Uvarov method
Indian Academy of Sciences (India)
P K Bera
2013-08-01
In this article, the eigenvalues for the three-body interactions on the line and the Landau levels in the presence of topological defects have been regenerated by the Nikiforov–Uvarov (NU) method. Two exhaustive lists of such exactly solvable potentials are given.
Analytic expression for three-body recombination rates into deep dimers
DEFF Research Database (Denmark)
Fedorov, D. V.; Mikkelsen, Mathias; Jensen, A. S.; Zinner, N. T.
2015-01-01
We investigate three-body recombination rates into deep dimers in cold atomic gases with large scattering length within hyper-spherical adiabatic zero-range approach. We derive closed analytic expressions for the rates for one- and two-species gases. Although the deep dimers are beyond the zero...
Three-body interactions in many-body effective field theory
International Nuclear Information System (INIS)
This contribution is an advertisement for applying effective field theory (EFT) to many-body problems, including nuclei and cold atomic gases. Examples involving three-body interactions are used to illustrate how EFT's quantify and systematically eliminate model dependence, and how they make many-body calculations simpler and more powerful
Effective three-body interactions in the α-cluster model for the 12C nucleus
Fedotov, S. I.; Kartavtsev, O. I.; Malykh, A. V.
2005-11-01
Properties of the lowest 0+ states of 12C are calculated to study the role of three-body interactions in the α-cluster model. An additional short-range part of the local three-body potential is introduced to incorporate the effects beyond the α-cluster model. There is enough freedom in this potential to reproduce the experimental values of the ground-state and excited-state energies and the ground-state root-mean-square radius. The calculations reveal two principal choices of the two-body and three-body potentials. Firstly, one can adjust the potentials to obtain the width of the excited 02+ state and the monopole 02+↦01+ transition matrix element in good agreement with the experimental data. In this case, the three-body potential has strong short-range attraction supporting a narrow resonance above the 02+ state, the excited-state wave function contains a significant short-range component, and the excited-state root-mean-square radius is comparable to that of the ground state. Next, rejecting the solutions with an additional narrow resonance, one finds that the excited-state width and the monopole transition matrix element are insensitive to the choice of the potentials and both values exceed the experimental ones.
Effective three-body interactions in the alpha-cluster model for the ^{12}C nucleus
Fedotov, S I; Malykh, A V
2005-01-01
Properties of the lowest $0^{+}$ states of $^{12}\\mathrm{C}$ are calculated to study the role of three-body interactions in the $\\alpha$-cluster model. An additional short-range part of the local three-body potential is introduced to incorporate the effects beyond the $\\alpha$-cluster model. There is enough freedom in this potential to reproduce the experimental values of the ground-state and excited-state energies and the ground-state root-mean-square radius. The calculations reveal two principal choices of the two-body and three-body potentials. Firstly, one can adjust the potentials to obtain the width of the excited $0_2^+$ state and the monopole $0_2^+ \\to 0_1^+ $ transition matrix element in good agreement with the experimental data. In this case, the three-body potential has strong short-range attraction supporting a narrow resonance above the $0_2^+$ state, the excited-state wave function contains a significant short-range component, and the excited-state root-mean-square radius is comparable to that ...
Equation of State of Spin-polarized Neutron Matter and Three-body Effect
Institute of Scientific and Technical Information of China (English)
ZuoWei
2003-01-01
Within the spin-dependent Brueckner-Hartree-Fock (BHF) framework, the equation of state of the spinpolarized neutron matter has been investigated by adopting the realistic nucleon-nucleon interaction supplemented with a microscopic three-body force. The three-body force has been turn out to be crucial for reproducing the empirical saturation properties of nuclear matter in a non-relativistic microscopic approach[2] such as BHF. The related physical quantities such as spin-symmetry energy, magnetic susceptibility, have been extracted. The three-body force effects have been studied and discussed with a special attention. It is found that in the whole range of spin-polarization, the cnergy per particle of spin-polarized neutron matter fulfills a quadratic relation versus the spin-polarization parameter. The calculated spin-symmetry energies as a function of densityare shown in Fig.l, where the solid curve is obtained by using the AVis two-body force plus the three-body force and the dashed curve is the result by adopting the pure AVis two-body force.
Analytical equation of state with three-body forces: Application to noble gases
Energy Technology Data Exchange (ETDEWEB)
Río, Fernando del, E-mail: fdr@xanum.uam.mx; Díaz-Herrera, Enrique; Guzmán, Orlando; Moreno-Razo, José Antonio [Departamento de Física, Universidad Autónoma Metropolitana, Iztapalapa, Apdo 55 534, México DF, 09340 (Mexico); Ramos, J. Eloy [Colegio de Ciencia y Tecnología, Universidad Autónoma de la Ciudad de México, Mexico DF (Mexico)
2013-11-14
We developed an explicit equation of state (EOS) for small non polar molecules by means of an effective two-body potential. The average effect of three-body forces was incorporated as a perturbation, which results in rescaled values for the parameters of the two-body potential. These values replace the original ones in the EOS corresponding to the two-body interaction. We applied this procedure to the heavier noble gases and used a modified Kihara function with an effective Axilrod-Teller-Muto (ATM) term to represent the two- and three-body forces. We also performed molecular dynamics simulations with two- and three-body forces. There was good agreement between predicted, simulated, and experimental thermodynamic properties of neon, argon, krypton, and xenon, up to twice the critical density and up to five times the critical temperature. In order to achieve 1% accuracy of the pressure at liquid densities, the EOS must incorporate the effect of ATM forces. The ATM factor in the rescaled two-body energy is most important at temperatures around and lower than the critical one. Nonetheless, the rescaling of two-body diameter cannot be neglected at liquid-like densities even at high temperature. This methodology can be extended straightforwardly to deal with other two- and three-body potentials. It could also be used for other nonpolar substances where a spherical two-body potential is still a reasonable coarse-grain approximation.
Three-body scattering hypervolume for ultracold atoms with a model two-body potential
Zhu, Shangguo; Tan, Shina
2015-05-01
It has been known that the three-boson low energy effective interaction influences the dynamic and the static properties of many bosons, including the ground state energies of dilute Bose-Einstein condensates. The three-body scattering hypervolume, which is a three-body analogue of the two-body scattering length, characterizes this effective interaction. Surprisingly, knowledge of this fundamental quantity has still been lacking, except for hard sphere bosons and bosons with large scattering length. For bosons with a soft-ball potential--the repulsive Gaussian potential, we determine the scattering hypervolume by solving the three-body Schrödinger equation numerically, and matching the solution with the asymptotic expansions for the wave function at large hyperradii. Our analyses of the three-body scattering hypervolume can be extended to the long-range Van der Waals potential. They will be necessary in the precise understanding of the energetics and dynamics of three, more, or many ultracold bosonic atoms.
Three-Body Interactions in Many-Body Effective Field Theory
Furnstahl, R J
2003-01-01
This contribution is an advertisement for applying effective field theory (EFT) to many-body problems, including nuclei and cold atomic gases. Examples involving three-body interactions are used to illustrate how EFT's quantify and systematically eliminate model dependence, and how they make many-body calculations simpler and more powerful.
Design And Construction Of Wireless Charging System Using Inductive Coupling
Directory of Open Access Journals (Sweden)
Do Lam Mung
2015-06-01
Full Text Available Abstract Wireless charging system described by using the method of inductive coupling. In this project oscillation circuit converts DC energy to AC energytransmitter coil to transmit magnetic field by passing frequency and then induce the receiver coil. The properties of Induction coupling are wavemagnetic field-wideband rangevery shortcm efficiencyhight and operation frequencyLF-bandseveral handred kHz.The project shows as a small charging for 5V battery of phone in this method. The system bases on coupling magnetic field then designed and constructed as two parts. There are transmitter part and receiver part. The transmitter coil transmitter part transmits coupling magnetic field to receiver coil receiver part by passing frequency at about 1.67MHz. The Amperes law Biot-Savart law and Faraday law are used to calculate the inductive coupling between the transmitter coil and the receiver coil. The calculation of this law shows how many power transfer in receiver part when how many distance between the transmitter coil and the receiver coil. The system is safe for users and neighbouring electronic devices. To get more accurate wireless charging system it needs to change the design of the following keywords.
Three-body dissociations: The photodissociation of dimethyl sulfoxide at 193 nm
Energy Technology Data Exchange (ETDEWEB)
Blank, D.A.; North, S.W.; Stranges, D. [Lawrence Berkeley National Lab., CA (United States)] [and others
1997-04-01
When a molecule with two equivalent chemical bonds is excited above the threshold for dissociation of both bonds, how the rupture of the two bonds is temporally coupled becomes a salient question. Following absorption at 193 nm dimethyl sulfoxide (CH{sub 3}SOCH{sub 3}) contains enough energy to rupture both C-S bonds. This can happen in a stepwise (reaction 1) or concerted (reaction 2) fashion where the authors use rotation of the SOCH{sub 3} intermediate prior to dissociation to define a stepwise dissociation: (1) CH{sub 3}SOCH{sub 3} {r_arrow} 2CH{sub 3} + SO; (2a) CH{sub 3}SOCH{sub 3} {r_arrow} CH{sub 3} + SOCH{sub 3}; and (2b) SOCH{sub 3} {r_arrow} SO + CH{sub 3}. Recently, the dissociation of dimethyl sulfoxide following absorption at 193 nm was suggested to involve simultaneous cleavage of both C-S bonds on an excited electronic surface. This conclusion was inferred from laser induced fluorescence (LIF) and resonant multiphoton ionization (2+1 REMPI) measurements of the internal energy content in the CH{sub 3} and SO photoproducts and a near unity quantum yield measured for SO. Since this type of concerted three body dissociation is very interesting and a rather rare event in photodissociation dynamics, the authors chose to investigate this system using the technique of photofragment translational spectroscopy at beamline 9.0.2.1. The soft photoionization provided by the VUV undulator radiation allowed the authors to probe the SOCH{sub 3} intermediate which had not been previously observed and provided good evidence that the dissociation of dimethyl sulfoxide primarily proceeds via a two step dissociation, reaction 2.
Charge density waves in strongly correlated electron systems
Chen, Chih-Wei; Choe, Jesse; Morosan, E.
2016-08-01
Strong electron correlations are at the heart of many physical phenomena of current interest to the condensed matter community. Here we present a survey of the mechanisms underlying such correlations in charge density wave (CDW) systems, including the current theoretical understanding and experimental evidence for CDW transitions. The focus is on emergent phenomena that result as CDWs interact with other charge or spin states, such as magnetism and superconductivity. In addition to reviewing the CDW mechanisms in 1D, 2D, and 3D systems, we pay particular attention to the prevalence of this state in two particular classes of compounds, the high temperature superconductors (cuprates) and the layered transition metal dichalcogenides. The possibilities for quantum criticality resulting from the competition between magnetic fluctuations and electronic instabilities (CDW, unconventional superconductivity) are also discussed.
Charge density waves in strongly correlated electron systems.
Chen, Chih-Wei; Choe, Jesse; Morosan, E
2016-08-01
Strong electron correlations are at the heart of many physical phenomena of current interest to the condensed matter community. Here we present a survey of the mechanisms underlying such correlations in charge density wave (CDW) systems, including the current theoretical understanding and experimental evidence for CDW transitions. The focus is on emergent phenomena that result as CDWs interact with other charge or spin states, such as magnetism and superconductivity. In addition to reviewing the CDW mechanisms in 1D, 2D, and 3D systems, we pay particular attention to the prevalence of this state in two particular classes of compounds, the high temperature superconductors (cuprates) and the layered transition metal dichalcogenides. The possibilities for quantum criticality resulting from the competition between magnetic fluctuations and electronic instabilities (CDW, unconventional superconductivity) are also discussed. PMID:27376547
Comparison of topologies suitable for Capacitor Charging Systems
Maestri, S; Uicich, G; Benedetti, M; Cravero, JM
2014-01-01
This paper presents a comparison between topologies suitable for capacitor charging systems. The topologies under evaluation are a flyback converter, a half-bridge series resonant converter and a full-bridge phase-shifted converter. The main features of these topologies are highlighted, which allows the proper topology selection according to the application requirements. Moreover, the performed analysis permits to characterize the operational range of the main components thus allowing their appropriate sizing and selection. Simulation results are provided.
EGUN, Charged Particle Trajectories in Electromagnetic Focusing System
International Nuclear Information System (INIS)
1 - Description of problem or function: EGUN computes trajectories of charged particles in electrostatic and magnetostatic focusing systems including the effects of space charge and self-magnetic fields. Starting options include Child's Law conditions on cathodes of various shapes, user-specified conditions input for each ray, and a combination of Child's Law conditions and user specifications. Either rectangular or cylindrically symmetric geometry may be used. Magnetic fields may be specified using an arbitrary configuration of coils, or the output of a magnet program, such as Poisson, or by an externally calculated array of the axial fields. 2 - Method of solution: The program first solves Laplace's equation. Next, the first iteration of electron trajectories is started using one of the four starting options. On the first iteration cycle, space charge forces are calculated from the assumption of paraxial flow. As the rays are traced, space charge is computed and stored. After all the electron trajectories have been calculated, the program begins the second cycle by solving the Poisson equation with the space charge from the first iteration. Subsequent iteration cycles follow this pattern. The Poisson equation is solved by an alternate column relaxation technique known as the semi-iterative Chebyshev method. A fourth-order Runge-Kutta method is used to solve the relativistic differential equations of the trajectory calculations. 3 - Restrictions on the complexity of the problem - Maxima of: 9001 mesh points in a square mesh, 300 mesh points in the axial direction, 100 mesh points in the radial direction, 101 potentials, 51 rays. In the cylindrical coordinates, the magnetic fields are axially symmetric. In rectangular coordinates, the external field is assumed to be normal to the plane of the problem, which is assumed to be the median plane
Pharmaceutical "charge compression" under the Medicare outpatient prospective payment system.
Braid, Mary Jo; Forbes, Kevin F; Moran, Donald W
2004-01-01
Analysis of the actual acquisition costs of a sample of pharmaceuticals demonstrates that payment rates for pharmaceutical therapies under the Medicare hospital outpatient prospective payment system (OPPS) are systematically biased against fully reimbursing high cost pharmaceutical therapies. Under the Centers for Medicare and Medicaid Services' (CMS') methodology, which assumes a constant markup, a bias in the cost estimate occurs when hospitals apply below average markups in establishing their charges for pharmaceutical products with above average costs. We developed a model of the relationship between product costs and charge markups. The logarithmic model shows that an increase in the acquisition cost per episode can be expected to lead to a reduction in the charge markup multiple. When markups for pharmaceuticals decline as acquisition cost increases, a rate-setting methodology that assumes a constant markup results in reimbursement for higher cost products that can be far below acquisition cost. The incentives in the payment system could affect site of care choices and beneficiary access. PMID:15151194
Fractional quantum Hall states in charge-imbalanced bilayer systems
Thiebaut, N.; Regnault, N.; Goerbig, M. O.
2013-01-01
We study the fractional quantum Hall effect in a bilayer with charge-distribution imbalance induced, for instance, by a bias gate voltage. The bilayer can either be intrinsic or it can be formed spontaneously in wide quantum wells, due to the Coulomb repulsion between electrons. We focus on fractional quantum Hall effect in asymmetric bilayer systems at filling factor nu=4/11 and show that an asymmetric Halperin-like trial wavefunction gives a valid description of the ground state of the system.
A Vision-based Wireless Charging System for Robot Trophallaxis
Directory of Open Access Journals (Sweden)
Jae-O Kim
2015-12-01
Full Text Available The need to recharge the batteries of a mobile robot has presented an important challenge for a long time. In this paper, a vision-based wireless charging method for robot energy trophallaxis between two robots is presented. Even though wireless power transmission allows more positional error between receiver-transmitter coils than with a contact-type charging system, both coils have to be aligned as accurately as possible for efficient power transfer. To align the coils, a transmitter robot recognizes the coarse pose of a receiver robot via a camera image and the ambiguity of the estimated pose is removed with a Bayesian estimator. The precise pose of the receiver coil is calculated using a marker image attached to a receiver robot. Experiments with several types of receiver robots have been conducted to verify the proposed method.
Dynamics of Charged Particulate Systems Modeling, Theory and Computation
Zohdi, Tarek I
2012-01-01
The objective of this monograph is to provide a concise introduction to the dynamics of systems comprised of charged small-scale particles. Flowing, small-scale, particles ("particulates'') are ubiquitous in industrial processes and in the natural sciences. Applications include electrostatic copiers, inkjet printers, powder coating machines, etc., and a variety of manufacturing processes. Due to their small-scale size, external electromagnetic fields can be utilized to manipulate and control charged particulates in industrial processes in order to achieve results that are not possible by purely mechanical means alone. A unique feature of small-scale particulate flows is that they exhibit a strong sensitivity to interparticle near-field forces, leading to nonstandard particulate dynamics, agglomeration and cluster formation, which can strongly affect manufactured product quality. This monograph also provides an introduction to the mathematically-related topic of the dynamics of swarms of interacting objects, ...
Yan, Yangqian; Blume, D.
2015-09-01
The low-energy spectrum of N -boson clusters with pairwise zero-range interactions is believed to be governed by a three-body parameter. We study the ground state of N -boson clusters with infinite two-body s -wave scattering length by performing ab initio Monte Carlo simulations. To prevent Thomas collapse, different finite-range three-body regulators are used. The energy and structural properties for the three-body Hamiltonian with two-body zero-range interactions and three-body regulator are in much better agreement with the "ideal zero-range Efimov theory" results than those for Hamiltonian with two-body finite-range interactions. For larger clusters we find that the ground-state energy and structural properties of the Hamiltonian with two-body zero-range interactions and finite-range three-body regulators are not universally determined by the three-body parameter, i.e., dependencies on the specific form of the three-body regulator are observed. For comparison, we consider Hamiltonian with two-body van der Waals interactions and no three-body regulator. For the interactions considered, the ground-state energy of the N -body clusters is—if scaled by the three-body ground-state energy—fairly universal, i.e., the dependence on the short-range details of the two-body van der Waals potentials is small. Our results are compared with those in the literature.
Three-body fragmentation of CO2 driven by intense laser pulses
International Nuclear Information System (INIS)
Dissociative ionization dynamics were studied experimentally for CO2 driven by intense laser pulses. Three-dimensional momentum vectors of correlated atomic ions were obtained for each three-body fragmentation event using triple ion coincidence measurement. Newton diagram demonstrated that three-body fragmentation of CO2n+ (n = 3-6) can occur through Coulomb explosion process and sequential fragmentation process depending on the fragmentation channels. The experimental data from these two processes were disentangled by using correlation diagram of correlated ions. Based on the accurate Coulomb explosion data, we reconstructed the bond angle distributions of CO2n+ at the moment of fragmentation, which are close to that of neutral CO2 before laser irradiation
Communication: Classical threshold law for ion-neutral-neutral three-body recombination
International Nuclear Information System (INIS)
A very recently method for classical trajectory calculations for three-body collision [Pérez-Ríos et al., J. Chem. Phys. 140, 044307 (2014)] has been applied to describe ion-neutral-neutral ternary processes for low energy collisions: 0.1 mK–10 mK. As a result, a threshold law for the three-body recombination cross section is obtained and corroborated numerically. The derived threshold law predicts the formation of weakly bound dimers, with binding energies comparable to the collision energy of the collisional partners. In this low energy range, this analysis predicts that molecular ions should dominate over molecular neutrals as the most products formed
Lagrangian relative equilibria for a gyrostat in the three-body problem: bifurcations and stability
Energy Technology Data Exchange (ETDEWEB)
Guirao, Juan L G; Vera, Juan A, E-mail: juan.garcia@upct.e, E-mail: juanantonio.vera@upct.e [Departamento de Matematica Aplicada y EstadIstica, Universidad Politecnica de Cartagena, Hospital de Marina, 30203 Cartagena, Region de Murcia (Spain)
2010-05-14
In this paper we consider the non-canonical Hamiltonian dynamics of a gyrostat in the frame of the three-body problem. Using geometric/mechanic methods we study the approximate dynamics of the truncated Legendre series representation of the potential of an arbitrary order. Working in the reduced problem, we study the existence of relative equilibria that we refer to as Lagrange type following the analogy with the standard techniques. We provide necessary and sufficient conditions for the linear stability of Lagrangian relative equilibria if the gyrostat morphology form is close to a sphere. Thus, we generalize the classical results on equilibria of the three-body problem and many results on them obtained by the classic approach for the case of rigid bodies.
Energy Scaling of Cold Atom-Atom-Ion Three-Body Recombination
Krükow, Artjom; Mohammadi, Amir; Härter, Arne; Denschlag, Johannes Hecker; Pérez-Ríos, Jesús; Greene, Chris H.
2016-05-01
We study three-body recombination of Ba++Rb +Rb in the mK regime where a single 138Ba+ ion in a Paul trap is immersed into a cloud of ultracold 87Rb atoms. We measure the energy dependence of the three-body rate coefficient k3 and compare the results to the theoretical prediction, k3∝Ecol-3 /4, where Ecol is the collision energy. We find agreement if we assume that the nonthermal ion energy distribution is determined by at least two different micromotion induced energy scales. Furthermore, using classical trajectory calculations we predict how the median binding energy of the formed molecules scales with the collision energy. Our studies give new insights into the kinetics of an ion immersed in an ultracold atom cloud and yield important prospects for atom-ion experiments targeting the s -wave regime.
Energy scaling of cold atom-atom-ion three-body recombination
Krükow, Artjom; Härter, Arne; Denschlag, Johannes Hecker; Pérez-Ríos, Jesús; Greene, Chris H
2015-01-01
We study three-body recombination of Ba$^+$ + Rb + Rb in the mK regime where a single $^{138}$Ba$^{+}$ ion in a Paul trap is immersed into a cloud of ultracold $^{87}$Rb atoms. We measure the energy dependence of the three-body rate coefficient $k_3$ and compare the results to the theoretical prediction, $k_3 \\propto E_{\\textrm{col}}^{-3/4}$ where $E_{\\textrm{col}}$ is the collision energy. We find agreement if we assume that the non-thermal ion energy distribution is determined by at least two different micro-motion induced energy scales. Furthermore, using classical trajectory calculations we predict how the median binding energy of the formed molecules scales with the collision energy. Our studies give new insights into the kinetics of an ion immersed into an ultracold atom cloud and yield important prospects for atom-ion experiments targeting the s-wave regime.
Three-body Effect on Equation of State of Spin-polarized Nuclear Matter
Institute of Scientific and Technical Information of China (English)
ZuoWei
2003-01-01
The equation of state (EOS) of spin-polarized nuclear matter has been investigated within the spin-dependent; Brueckner-Hartree-Fock framework by adopting the realistic nucleon-nucleon interaction supplemented with a microscopic three-body force. The three-body force effects have been studied and stressed with a special attention. The calculated results are given in Fig.1. It is seen that; in the Brueckner-Hartree-Fock framework the predicted energy per particle of spin-polarized nuclear matter versus the neutron and proton spin-polarization parameters fulfills a quadratic law in the whole range of spin-polarization. The related physical quantities such as spin the Landau parameters Go in spin channel and G′0 in spin-isospin channel, have been also calculated.
Universal threshold law for ion-neutral-neutral three-body recombination
Pérez-Ríos, Jesús
2015-01-01
A very recently method for classical trajectory calculations for three-body collision [J. P\\'{e}rez-R\\'{i}os, S. Ragole, J. Wang and C. H. Greene, J. Chem. Phys. {\\bf 140}, 044307 (2014)] has been applied to describe ion-neutral-neutral ternary processes for low energy collisions: 0.1 mK - 10 mK. As a result, a threshold law for the three-body recombination cross section is obtained and corroborated both, experimentally and numerically. The derived threshold law predicts the formation of weakly bound dimers, with binding energies comparable to the collision energy of the collisional partners. In this low energy range, this analysis predicts that molecular ions should dominate over molecular neutrals as the most products formed.
Complex solitons in Bose-Einstein condensates with two- and three-body interactions
Energy Technology Data Exchange (ETDEWEB)
Roy, Utpal [Universita di Camerino, I-62032 Camerino (Italy); Atre, Rajneesh [Jaypee Institute of Engineering and Technology, Guna 473 226 (India); Sudheesh, C [Indian Institute of Science, Bangalore 560 012 (India); Kumar, C Nagaraja [Punjab University, Chandigarh 160 014 (India); Panigrahi, Prasanta K, E-mail: utpal.roy@unicam.i, E-mail: utpalphys@gmail.co, E-mail: prasanta@prl.res.i [Physical Research Laboratory, Ahmedabad 380 009 (India)
2010-01-28
For the first time, we find the complex solitons for a quasi-one-dimensional Bose-Einstein condensate with two- and three-body interactions. These localized solutions are characterized by a power law behaviour. Both dark and bright solitons can be excited in the experimentally allowed parameter domain, when two- and three-body interactions are, respectively, repulsive and attractive. The dark solitons travel with a constant speed, which is quite different from the Lieb mode, where profiles with different speeds, bounded above by sound velocity, can exist for specified interaction strengths. We also study the properties of these solitons in the presence of harmonic confinement with time-dependent nonlinearity and loss. The modulational instability and the Vakhitov-Kolokolov criterion of stability are also studied.
Genuine three-body Bose-Einstein correlations and percolation of strings
International Nuclear Information System (INIS)
Recent data show a large difference of the genuine three-body Bose-Einstein correlations in S-Pb collisions and in Pb-Pb central collisions being close to zero in the first case and to one in the second one. These results, unexpected from conventional approaches, are naturally explained by the percolation of colour strings produced in the collisions and subsequent incoherent fragmentation of the formed clusters
Stability chart of the triangular points in the elliptic restricted problem of three bodies
Kovacs, Tamas
2013-01-01
The possible observations of Trojan-like extrasolar planets stimulate the deeper understanding of the stability behaviour of the co-orbital resonant motion. By using Hill's equations and the energy-rate method an analysis of the stability map of the elliptic restricted three-body problem is performed. Regions of the $\\mu-e$ parameter plane are described numerically and related to the resonant frequencies of librational motion. Stability and instability can therefore be obtained by analysing t...
Generalization of Levi-Civita regularization in the restricted three-body problem
Roman, R
2013-01-01
A family of polynomial coupled function of $n$ degree is proposed, in order to generalize the Levi-Civita regularization method, in the restricted three-body problem. Analytical relationship between polar radii in the physical plane and in the regularized plane are established; similar for polar angles. As a numerical application, trajectories of the test particle using polynomial functions of $2, 3,..., 8$ degree are obtained. For the polynomial of second degree, the Levi-Civita regularization method is found.
Role of three-body ΛNN forces in s-shell hypernuclei
International Nuclear Information System (INIS)
Studies on hypernuclei suggest that the two-body ΛN interactions are not sufficient to explain the binding energies of hypernuclei. Weitzner was the first one to point out this fact, and many others followed. We show in our study that the three-body ΛNN forces play an important role in fixing the binding energies of the light s-shell hypernuclei namely, Λ4H (ground state), Λ4H* (excited state), and Λ5He
$L^1$-optimality conditions for circular restricted three-body problems
Chen, Zheng
2015-01-01
In this paper, the L1-minimization for the translational motion of a spacecraft in a circular restricted three-body problem (CRTBP) is considered. Necessary con- ditions are derived by using the Pontryagin Maximum Principle, revealing the existence of bang-bang and singular controls. Singular extremals are detailed, re- calling the existence of the Fuller phenomena according to the theories developed by Marchal in Ref. [14] and Zelikin et al. in Refs. [12, 13]. The sufficient opti- mality con...
Precise numerical results for limit cycles in the quantum three-body problem
Mohr, R. F.; Furnstahl, R. J.; Hammer, H. -W.; Perry, R. J.; Wilson, K G
2005-01-01
The study of the three-body problem with short-range attractive two-body forces has a rich history going back to the 1930's. Recent applications of effective field theory methods to atomic and nuclear physics have produced a much improved understanding of this problem, and we elucidate some of the issues using renormalization group ideas applied to precise nonperturbative calculations. These calculations provide 11-12 digits of precision for the binding energies in the infinite cutoff limit. ...
A note on independent variables for restricted three-body problems.
Heppenheimer, T. A.
1971-01-01
In studies of the elliptic restricted three-body problem, the true anomaly of the motion of the primaries is often used as the independent variable. The equations of motion then show invariancy in form from the circular case. It is of interest whether other independent variables exist, such that the invariant form of the equations is maintained. It is found that true anomaly is the only such variable.
Non-uniqueness of local stress of three-body potentials in molecular simulations
Nakagawa, Koh M
2016-01-01
Microscopic stress fields are widely used in molecular simulations to understand mechanical behavior. Recently, decomposition methods of multibody forces to central force pairs between the interacting particles have been proposed. Here, we introduce a force center of a three-body potential and propose alternative force decompositions that also satisfy the conservation of translational and angular momentum. We compare the force decompositions by stress-distribution magnitude and discuss their difference in the stress profile of a bilayer membrane.
Direct CP Violation in Charmless Three-body Decays of $B$ Mesons
Cheng, Hai-Yang; Zhang, Zhi-Qing
2016-01-01
Direct CP violation in charmless three-body hadronic decays of $B$ mesons is studied within the framework of a simple model based on the factorization approach. Three-body decays of heavy mesons receive both resonant and nonresonant contributions. Dominant nonresonant contributions to tree-dominated and penguin-dominated three-body decays arise from the $b\\to u$ tree transition and $b\\to s$ penguin transition, respectively. The former can be evaluated in the framework of heavy meson chiral perturbation theory with some modification, while the latter is governed by the matrix element of the scalar density $\\langle M_1M_2|\\bar q_1 q_2|0\\rangle$. Strong phases in this work reside in effective Wilson coefficients, propagators of resonances and the matrix element of scalar density. In order to accommodate the branching fraction and CP asymmetries observed in $B^-\\to K^-\\pi^+\\pi^-$, the matrix element $\\langle K\\pi|\\bar sq|0\\rangle$ should have an additional strong phase, which might arise from some sort of power c...
Primordial star formation: relative impact of H2 three-body rates and initial conditions
Bovino, S; Grassi, T
2013-01-01
Population III stars are the first stars in the Universe to form at z=20-30 out of a pure hydrogen and helium gas in minihalos of 10^5-10^6 M$_\\odot$ . Cooling and fragmentation is thus regulated via molecular hydrogen. At densities above 10^8 cm$^{-3}$, the three-body H2 formation rates are particularly important for making the gas fully molecular. These rates were considered to be uncertain by at least a few orders of magnitude. We explore the impact of new accurate three-body H2 formation rates derived by Forrey (2013) for three different minihalos, and compare to the results obtained with three-body rates employed in previous studies. The calculations are performed with the cosmological hydrodynamics code ENZO (release 2.2) coupled with the chemistry package KROME (including a network for primordial chemistry), which was previously shown to be accurate in high resolution simulations. While the new rates can shift the point where the gas becomes fully molecular, leading to a different thermal evolution, th...
Aggregator-Based Interactive Charging Management System for Electric Vehicle Charging
Directory of Open Access Journals (Sweden)
Mingchao Xia
2016-03-01
Full Text Available With the ongoing large-scale implementation of electric vehicles (EVs, the exploration of a more flexible approach to maintain fair interaction between EVs and the power grid is urgently required. This paper presents an aggregator-based interactive charging management scheme adopting interruptible load (IL pricing, in which the EV aggregator will respond to the load control command of the grid in an EV interactive mode. Charging managements are carried out according to battery state-of-charge and the EV departure time in EV charging stations. A power-altering charging (PAC control method is proposed to dispatch the EVs charging fairly in a station and guarantee EV owners’ preferences. The method does not require classical iterative procedures or heavy computations; furthermore, it is beneficial for EVs to depart earlier than expected for reasons beyond keeping homeostatic charging. The proposed scheme, which is tested to charge individual EVs well according to its preference, was implemented as part of an “EV Beijing” project. The proposed management scheme provides new insight into EV charging strategy and provides another choice to EV users.
Kallrath, Josef
1992-03-01
The envelope of iso-energetic trajectories in the (repulsive) two-fixed-center problem is derived. Analytical calculations finally lead to a transcendental equation, only containing elliptic integrals and the Weierstrass function, from which the envelope is constructed. The results may serve as a simple model for the boundary layer between two colliding supersonic stellar wind flows in binary systems, in which at least one of the components has a strong radiation field. Beyond this, the effect of noninertial forces due to the binary's orbital motion has been estimated by a numerical analysis within the scope of the (repulsive) restricted three-body problem. All calculations have been performed for a hot model (Wolf-Rayet/O-star) binary system with a set of parameters which might be appropriate for HD 152270.
Scanning system for charged and neutral particle beams
International Nuclear Information System (INIS)
The present invention aims at providing a simple and reliable method and a reliable device for irradiating a confined volume of matter, preferably at great depth, with a beam of high energy charged or neutral particles. The basic feature of the invention is that the particle beam coming from a radiation source of charged particles is scanned electrically in two orthogonal directions, and that the beam scanned in one plane is deflected in space. For most practical purposes it is important that the radiation source is of small extension. Such a radiation source is realized by means of a beam optical system that includes two scanning magnets each of which admits scanning of the particle beam in one of two orthogonal planes. The beam scanned in one of the planes leaves the associated scanning magnet from an effective scanning centre. The optical system also includes a deflection magnet disposed between the scanning magnets for deflecting the path of the beam in space. By utilizing the optical properties of the deflection magnet in such a way that the deflection magnet produces an image of the effective scanning centre of the first scanning magnet which coincides with the effective scanning centre of the second scanning magnet, the beam scanned in two orthogonal planes will radiate isotropically from the scanning centre of the second scanning magnet. By using the deflection magnet a compact scanning system with a small distance between the scanning centres of the scanning magnets is obtained
Deltuva, A.; Yuan, L. P.; Adam Jr., J.; Sauer, P. U.
2004-01-01
Electron scattering from the three-nucleon bound state with two- and three-body disintegration is described. The description uses the purely nucleonic charge-dependent CD-Bonn potential and its coupled-channel extension CD-Bonn + $\\Delta$. Exact solutions of three-particle equations are employed for the initial and final states of the reactions. The current has one-baryon and two-baryon contributions and couples nucleonic with $\\Delta$-isobar channels. $\\Delta$-isobar effects on the observabl...
Energy Technology Data Exchange (ETDEWEB)
Schuecker, Franz-Josef [ThyssenKrupp Industrial Solutions AG, Dortmund (Germany). Head of Oven Machine Dept., Coke Plant Technologies
2014-10-01
This article describes a process which reduces emissions from coke production in coke plants. The focus is on the charging process, which can be partly responsible for the fact that statutory emissions limits, which were originally met, are exceeded as coke plants get older. This article presents a solution in the form of a newly developed system that allows the oven charging system - the charging car - to respond to age-related changes in the geometry of a coke oven and thereby reduce the level of emissions.
Space charge dynamics in pressboard-oil-pressboard multilayer system under DC voltages
Fu, Mingli; Luo, Bing; Hou, Shuai; Liao, Yifan; Hao, Miao; Chen, George
2015-01-01
Converter transformers play a critical role in HVDC power transmission system. Space charge is a general concern for dielectric system under DC field. In this paper, the space charge behavior in a sandwiched oil-pressboard insulation system has been investigated using the pulsed electro-acoustic (PEA) method. The presence of homo-charges in the pressboards bulk and hetero-charges at the two interfaces between oil gap and pressboards leads to the electric field enhancement in the pressboards b...
Zubir, Mohd Nashrul Mohd; Badarudin, A; Kazi, S N; Misran, Misni; Amiri, Ahmad; Sadri, Rad; Khalid, Solangi
2015-09-15
The present work highlighted on the implementation of a unique concept for stabilizing colloids at their incipiently low charge potential. A highly charged nanoparticle was introduced within a coagulated prone colloidal system, serving as stabilizer to resist otherwise rapid flocculation and sedimentation process. A low size asymmetry of nanoparticle/colloid serves as the new topic of investigation in addition to the well-established large size ratio nanoparticle/microparticle study. Highly charged Al2O3 nanoparticles were used within the present research context to stabilize TiO2 and Fe3O4 based colloids via the formation of composite structures. It was believed, based on the experimental evidence, that Al2O3 nanoparticle interact with the weakly charged TiO2 and Fe3O4 colloids within the binary system via absorption and/or haloing modes to increase the overall charge potential of the respective colloids, thus preventing further surface contact via van der Waal's attraction. Series of experimental results strongly suggest the presence of weakly charged colloids in the studied bimodal system where, in the absence of highly charged nanoparticle, experience rapid instability. Absorbance measurement indicated that the colloidal stability drops in accordance to the highly charged nanoparticle sedimentation rate, suggesting the dominant influence of nanoparticles to attain a well-dispersed binary system. Further, it was found that the level of colloidal stability was enhanced with increasing nanoparticle fraction within the mixture. Rheological observation revealed that each hybrid complexes demonstrated behavior reminiscence to water with negligible increase in viscosity which serves as highly favorable condition particularly in thermal transport applications. PMID:26048724
$B^+\\to K^-\\pi^+\\pi^+$: three-body final state interactions and $K\\pi$ isospin states
Nogueira, J H Alvarenga; Lourenço, O
2016-01-01
Final state interactions are considered to formulate the $B$ meson decay amplitude for the $K\\pi\\pi$ channel. The Faddeev decomposition of the Bethe-Salpeter equation is used in order to build a relativistic three-body model within the light-front framework. The S-wave scattering amplitude for the $K\\pi$ system is considered in the $1/2$ and $3/2$ isospin channels with the set of inhomogeneous integral equations solved perturbatively. In comparison with previous results for the $D$ meson decay in the same channel, one has to consider the different partonic processes, which build the source amplitudes, and the larger absorption to other decay channels appears, that are important features to be addressed. As in the $D$ decay case, the convergence of the rescattering perturbative series is also achieved with two-loop contributions.
Dubeibe, F L; González, Guillermo A
2016-01-01
In the present paper, using the first-order approximation of the $n$-body Lagrangian derived on the basis of the post-Newtonian gravitational theory of Einstein, Infeld, and Hoffmann, we explicitly write down the equations of motion of the planar circular restricted three-body problem. Unlike previously published works, the resulting equations of motion are not truncated up to the same order of the Lagrangian, such that in our case the Jacobian constant is preserved to a good approximation. We also analyse the dynamics of the system in terms of the Poincar\\'e sections method, finding that for specific values of the Jacobian constant the dynamics can be either chaotic or regular.
International Nuclear Information System (INIS)
Cross sections of ion-molecular reactions in hydrogen systems of H+-H2, H2+-H2 and H3+-H2 and charge transfer cross sections of multiply charged ions in atomic and molecular targets are presented in graphs and tables of the part A, B and C. All data presented for 99 collision systems have been measured systematically using an octo-pole ion beam guide (OPIG) technique till now since 1985. The part A is for ion-molecular reactions in hydrogen systems. In the lower energy region below few eV in center-of-mass systems, it is seen obviously at a glance that the ion-molecular reaction in hydrogen systems is dominated by H3+ formation process. In the energy region from few eV to few hundred eV in center-of-mass systems, many reaction channels of decay processes from intermediate molecular states seem to be opened resonantly. Some of cross section data in the part B for charge transfer reactions of low-charged ions produced by a conventional electron impact type (Nier type) ion source should be noted to strongly depend on the electron impact energy due to contamination of low lying metastable states in projectile ions. The part C is for charge transfer reactions of multiply charged ions extracted from a small type of electron beam ion source (Mini-EBIS). In measurements using the mini-EBIS, no evidence of metastable ions existing in the primary ion beam has been found except for doubly charged ion beam. The higher energy end of the present cross sections are connected with previous data in fairly good
Energy Technology Data Exchange (ETDEWEB)
Fushitani, M.; Matsuda, A.; Hishikawa, A., E-mail: hishi@chem.nagoya-u.ac.jp [Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602 (Japan); Tseng, C.-M. [Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki, Aichi 444-8585 (Japan)
2015-12-31
Three-body Coulomb explosion of formaldehyde (H{sub 2}CO) in intense 7- and 35-fs laser fields (1.3 × 10{sup 15} W/cm{sup 2}) has been investigated by using ion-coincidence momentum imaging technique. Two types of explosion pathways from the triply charged state, H{sub 2}CO{sup 3+} → (i) H{sup +} + H{sup +} + CO{sup +} and (ii) H{sup +} + CH{sup +} + O{sup +}, have been identified. It is shown from the momentum correlation of the fragment ions of pathway (i), that the geometrical structure of the molecule is essentially frozen along the H-C-H bending coordinate for the 7-fs case. On the other hand, for a longer pulse duration (35 fs), structural deformation along the C-H stretching and H-C-H bending coordinates is identified, which is ascribed to the nuclear dynamics in the dication states populated within the laser pulse duration.
Investigation of halo structure of 6He by hyperspherical three-body method
Indian Academy of Sciences (India)
Md Abdul Khan; Tapan Kumar Das
2001-10-01
Hyperspherical harmonics expansion method is applied to a three-body model of two neutron halo nuclei. Convergence of the expansion has been ensured. A repulsive part is introduced in the interaction between the core and the extra-core neutron, to simulate Pauli principle. Two neutron separation energy, r.m.s. radii, correlation factor and probability density distributions have been calculated for 6He. It is found that the convergence of the two neutron separation energy is relatively slow, while other quantities reach convergence quickly.
Lyapunov vs. geometrical stability analysis of the Kepler and the restricted three body problems
DEFF Research Database (Denmark)
Yahalom, A.; Levitan, J.; Lewkowicz, M.;
2011-01-01
standard Lyapunov analysis and the strength of the geometrical analysis. Moreover, we apply this approach to the three body problem in which the third body is restricted to move on a circle of large radius which induces an adiabatic time dependent potential on the second body. This causes the second body...... to move in a very interesting and intricate but periodic trajectory; however, the standard Lyapunov analysis, as well as methods based on the parametric variation of curvature associated with the Jacobi metric, incorrectly predict chaotic behavior. The geometric approach predicts the correct stable...
International Nuclear Information System (INIS)
Through a Gross–Pitaevskii equation comprising cubic, quartic, residual, and quintic nonlinearities, we examine the modulational instability (MI) of Bose–Einstein condensates at higher densities in the presence of quantum fluctuations. We obtain an explicit time-dependent criteria for the MI and the instability domains of the condensates. Solitons are generated by suitably exciting the MI, and their stability is analyzed. We find that quantum fluctuations can completely change the instability of condensates by reversing the nature of the effective two-body interactions. The interplay between three-body interactions and quantum fluctuations is shown. Numerical simulations performed agree with analytical predictions.
Low-energy three-body recombination near a Feshbach resonance
Kartavtsev, O I
2002-01-01
Ultralow-energy three-body recombination of identical particles with internal degrees of freedom is considered. The study reveals two different mechanisms for recombination enhancement below and above resonance, namely, production of loosely bound dimers for positive scattering length a(B) -> infinity and diminishing of the potential barrier in the entrance channel for negative a(B) -> -infinity. The recombination rate on both sides of the Feshbach resonance is found to diverge as a power of the resonance detuning. The results are in agreement with experimental data. Refs. 19 (author)
Three-body model calculations of Nucleon-Delta and Delta-Delta dibaryon resonances
Gal, Avraham; Garcilazo, Humberto
2014-01-01
Three-body hadronic models with separable pairwise interactions are formulated and solved to calculate resonance masses and widths of L=0 N-Delta and Delta-Delta dibaryons using relativistic kinematics. For N-Delta, I(JP)=1(2+) and 2(1+) resonances slightly below threshold are found by solving pi-N-N Faddeev equations. For Delta-Delta, several resonances below threshold are found by solving pi-N-Delta Faddeev equations in which the N-Delta interaction is dominated by the 1(2+) and 2(1+) reson...
Continuum excitations of $^{26}$O in a three-body model: $0^+$ and $2^+$ states
Grigorenko, L V
2015-01-01
The structure and decay dynamics for $0^+$ and $2^+$ continuum excitations of $^{26}$O are investigated in a three-body $^{24}$O+$n$+$n$ model. Validity of a simple approximation for the cross section profile for long-lived $2n$ emission is demonstrated. Sequence of three $0^+$ monopole ("breathing mode" type) excited states is predicted. These states could probably be interpreted as analogues of Efimov states pushed into continuum by insufficient binding. The possible energies of the $2^+$ states are related to excitation spectrum of $^{25}$O. We discuss possible connection of predicted $^{26}$O spectrum with observations.
Energy Technology Data Exchange (ETDEWEB)
Wamba, Etienne, E-mail: wambaetienne@yahoo.fr [Laboratory of Mechanics, Department of Physics, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé (Cameroon); Department of Physics, Pondicherry University, Puducherry 605014 (India); Porsezian, K., E-mail: ponz.phy@pondiuni.edu.in [Department of Physics, Pondicherry University, Puducherry 605014 (India); Mohamadou, Alidou, E-mail: mohdoufr@yahoo.fr [The Abdus Salam International Centre for Theoretical Physics, P.O. Box 586, Strada Costiera 11, I-34014, Trieste (Italy); Condensed Matter Laboratory, Department of Physics, Faculty of Science, University of Douala, P.O. Box 24157, Douala (Cameroon); Kofané, Timoléon C. [Laboratory of Mechanics, Department of Physics, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé (Cameroon)
2013-01-03
Through a Gross–Pitaevskii equation comprising cubic, quartic, residual, and quintic nonlinearities, we examine the modulational instability (MI) of Bose–Einstein condensates at higher densities in the presence of quantum fluctuations. We obtain an explicit time-dependent criteria for the MI and the instability domains of the condensates. Solitons are generated by suitably exciting the MI, and their stability is analyzed. We find that quantum fluctuations can completely change the instability of condensates by reversing the nature of the effective two-body interactions. The interplay between three-body interactions and quantum fluctuations is shown. Numerical simulations performed agree with analytical predictions.
AMS-02 Positron Excess and Indirect Detection of Three-body Decaying Dark Matter
Cheng, Hsin-Chia; Huang, Wei-Chih; Huang, Xiaoyuan; Low, Ian; Tsai, Yue-Lin Sming(Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan); Yuan, Qiang
2016-01-01
We consider indirect detection of meta-stable dark matter particles decaying into a stable neutral particle and a pair of standard model fermions. Due to the softer energy spectra from the three-body decay, such models could potentially explain the AMS-02 positron excess without being constrained by the Fermi-LAT gamma-ray data and the cosmic ray anti-proton measurements. We scrutinize over different final state fermions, paying special attention to handling of the cosmic ray background and i...
TMD Parton Distributions based on Three-Body Decay Functions in NLL Order of QCD
Tanaka, Hidekazu
2014-01-01
Three-body decay functions in space-like parton branches are implemented to evaluate transverse-momentum-dependent (TMD) parton distribution functions in the next-to-leading logarithmic (NLL) order of quantum chromodynamics (QCD). Interference contributions due to the next-to-leading order contribution are taken into account for the evaluation of the transverse momenta in initial state parton radiations. Some properties of the decay functions are also examined. As an example, we compare our results with an algorithm proposed in Ref.1), in which a transverse momentum distributions are evaluated at the last step of parton evolutions.
Excited State Structural Dynamics of Carotenoids and Charge Transfer Systems
International Nuclear Information System (INIS)
This dissertation describes the development and implementation of a visible/near infrared pump/mid-infrared probe apparatus. Chapter 1 describes the background and motivation of investigating optically induced structural dynamics, paying specific attention to solvation and the excitation selection rules of highly symmetric molecules such as carotenoids. Chapter 2 describes the development and construction of the experimental apparatus used throughout the remainder of this dissertation. Chapter 3 will discuss the investigation of DCM, a laser dye with a fluorescence signal resulting from a charge transfer state. By studying the dynamics of DCM and of its methyl deuterated isotopomer (an otherwise identical molecule), we are able to investigate the origins of the charge transfer state and provide evidence that it is of the controversial twisted intramolecular (TICT) type. Chapter 4 introduces the use of two-photon excitation to the S1 state, combined with one-photon excitation to the S2 state of the carotenoid beta-apo-8'-carotenal. These 2 investigations show evidence for the formation of solitons, previously unobserved in molecular systems and found only in conducting polymers Chapter 5 presents an investigation of the excited state dynamics of peridinin, the carotenoid responsible for the light harvesting of dinoflagellates. This investigation allows for a more detailed understanding of the importance of structural dynamics of carotenoids in light harvesting
Directory of Open Access Journals (Sweden)
R Fathi
2011-09-01
Full Text Available A three-body model is devised to study differential and total cross sections for the excitation of helium atom under impact of energetic protons. The actual process is a four body one but in the present model the process is simplified into a three-body one. In this model, an electron of helium atom is assumed to be inactive and only one electron of the atom is active. Therefore, the active electron is assumed to be in an atomic state with a potential of the nucleus, T, being screened by the inactive electron, e, and, thus, an effective charge of Ze. As a result, the ground state, 11S, or the excited states, 21S and 21P, wave function of the active electron is deduced from similar hydrogenic wave functions assuming effective charge, Ze for the combined nucleus (T+e. In this three-body model, the Faddeev-Watson-Lovelace formalism for excitation channel is used to calculate the transition amplitude. In the first order approximation, electronic and nuclear interaction is assumed in the collision to be A(1e=
Aggregator-Based Interactive Charging Management System for Electric Vehicle Charging
Mingchao Xia; Qingying Lai; Yajiao Zhong; Canbing Li; Hsiao-Dong Chiang
2016-01-01
With the ongoing large-scale implementation of electric vehicles (EVs), the exploration of a more flexible approach to maintain fair interaction between EVs and the power grid is urgently required. This paper presents an aggregator-based interactive charging management scheme adopting interruptible load (IL) pricing, in which the EV aggregator will respond to the load control command of the grid in an EV interactive mode. Charging managements are carried out according to battery state-of-char...
Lu, Gaopeng; Cummer, Steven A.; Li, Jingbo; Han, Feng; Blakeslee, Richard J.; Christian, Hugh J.
2009-08-01
Lightning observations in the very high frequency band and measurements of ultra low frequency magnetic fields are analyzed to investigate the charge transfer and in-cloud structure of eight positive cloud-to-ground (+CG) strokes in a mesoscale convective system. Although no high altitude images were recorded, these strokes contained large charge moment changes (1500-3200 C·km) capable of producing nighttime sprites. Even though the convective region of the storm was where the flashes originated and where the CG strokes could occur, the charge transferred to ground was mainly from the stratiform region. The post-stroke long continuing currents were connected to highly branched negative leader extension into the stratiform region. While the storm dissipated, the altitude of negative leader propagation in the stratiform area dropped gradually from 8 to 5 km, indicating that in some and perhaps all of these strokes, it was the upper positive charge in the stratiform region that was transferred.
Towards the new frontier in non-leptonic three-body B-decays
International Nuclear Information System (INIS)
Dalitz plot analyses of non-leptonic three-body B decays such as B → πππ, are interesting for a number of phenomenological applications like the extraction of the CKM angle α and the determination of CP asymmetries. Previous studies used explicit models for the resonant contributions of the three-body phase space. In contrast, we carry out a model-independent analysis of the B → πππ Dalitz plots within the framework of QCD factorization. We identify the relevant theoretical description in the different regions of the phase space and reconstruct the Dalitz plot by a merging of the descriptions in those regions. Resonant contributions and rescattering effects are part of the long distance QCD effects naturally contained in generalized form factors and 2-pion distribution amplitudes, which can be fitted to data. We present first results for the branching ratios of anti B0 → π+π-π0 to leading order in αs and leading power in ΛQCD/MB.
Discovery of an Equilibrium Circle in the Circular Restricted Three Body Problem
Directory of Open Access Journals (Sweden)
Fawzy A. Abd El-Salam
2012-01-01
Full Text Available Problem statement: A traial to find equilibrium points in out of plane of the restricted three body problem. Approach: Solution of the equations of motion at equilibrium points. Linearizing the equations of motion and computing the eigen values to investigate the stability. Results: New triangular equilibrium points in plane perpendicular to the plane of motion and passing through Lagrange triangular equilibrium points are obtained. A circle of equilibrium points, namely Fawzy equilibrium circle is discovered. Infinite number of equilibrium points located on the circumference of this circle are computed. The obtained solutions are checked via obtaining some special cases. The stability of Fawzy equilibrium circle is studied. The oscillatory stable solutions as Î·-dependent and Î¾-dependent stabilities are derived. Conclusion: The equilibrium points in out of plane of motion of the restricted three body problem is investigated. We obtained the following very new results:- First we obtained Fawzy Î¾Î¾-triangular equilibrium points in the plane Î· = 0. Second we obtained the so called Fawzy equilibrium circle. We checked our solutions via obtaining some special cases. We studied the stability of Fawzy equilibrium circle. We derived the oscillatory stable solutions as Î·-dependent and Î¾-dependent stabilities. The stability of Lagrange as well as Fawzy triangular equilibrium points followed directly because they are subsets of the Fawzy equilibrium circle.
Orientational ordering in hard rectangles: The role of three-body correlations.
Martínez-Ratón, Yuri; Velasco, Enrique; Mederos, Luis
2006-07-01
We investigate the effect of three-body correlations on the phase behavior of hard rectangle two-dimensional fluids. The third virial coefficient B3 is incorporated via an equation of state that recovers scaled particle theory for parallel hard rectangles. This coefficient, a functional of the orientational distribution function, is calculated by Monte Carlo integration, using an accurate parametrized distribution function, for various particle aspect ratios in the range of 1-25. A bifurcation analysis of the free energy calculated from the obtained equation of state is applied to find the isotropic (I)-uniaxial nematic (N(u)) and isotropic-tetratic nematic (N(t)) spinodals and to study the order of these phase transitions. We find that the relative stability of the N(t) phase with respect to the isotropic phase is enhanced by the introduction of B3. Finally, we have calculated the complete phase diagram using a variational procedure and compared the results with those obtained from scaled particle theory and with Monte Carlo simulations carried out for hard rectangles with various aspect ratios. The predictions of our proposed equation of state as regards the transition densities between the isotropic and orientationally ordered phases for small aspect ratios are in fair agreement with simulations. Also, the critical aspect ratio below which the N(t) phase becomes stable is predicted to increase due to three-body correlations, although the corresponding value is underestimated with respect to simulation. PMID:16863310
The Geometry of Halo and Lissajous Orbits in Circular Restricted Three Body Problem with Drag Forces
Pal, Ashok Kumar
2014-01-01
In this article we determine the effect of radiation pressure, Poynting-Robertson drag and solar wind drag on the Sun-(Earth-Moon) restricted three body problem. Here, we take the bigger body Sun as a bigger primary, and Earth+Moon as a smaller primary. With the help of perturbation technique we find the Lagrangian points, and see that the collinear points deviate from the axis joining the primaries, whereas the triangular points remain unchanged in their configuration. It is also found that Lagrangian points move toward the Sun when radiation pressure increases. We have also analyzed the stability of the triangular equilibrium points and found that they are unstable due drag forces. Moreover, we have computed the halo orbits in the third-order approximation using Lindstedt-Poincar$\\acute{e}$ method and found the effect of the drag forces. According to this prevalence, the Sun-(Earth-Moon) model is used to design the trajectory for spacecraft traveling under the drag forces. keywords:Restricted three body pro...
Exact Analytical Solutions in Three-Body Problems and Model of Neutrino Generator
Directory of Open Access Journals (Sweden)
Takibayev N.Zh.
2010-04-01
Full Text Available Exact analytic solutions are obtained in three-body problem for the scattering of light particle on the subsystem of two ﬁxed centers in the case when pair potentials have a separable form. Solutions show an appearance of new resonance states and dependence of resonance energy and width on distance between two ﬁxed centers. The approach of exact analytical solutions is expanded to the cases when two-body scattering amplitudes have the Breit-Wigner’s form and employed for description of neutron resonance scattering on subsystem of two heavy nuclei ﬁxed in nodes of crystalline lattice. It is shown that some resonance states have widths close to zero at the certain values of distance between two heavy scatterer centers, this gives the possibility of transitions between states. One of these transitions between three-body resonance states could be connected with process of electron capture by proton with formation of neutron and emission of neutrino. This exoenergic process leading to the cooling of star without nuclear reactions is discussed.
Consistent description of 12C and 16O using finite range three-body interaction
Itagaki, N
2016-01-01
Consistent description of 12C and 16O has been a long standing problem of microscopic alpha cluster models, where the wave function is fully antisymmetrized and the effective interaction is applied not between alpha clusters but between nucleons. When the effective interaction is designed to reproduce the binding energy of 16O (four alpha), the binding energy of 12C (three alpha) becomes underbound by about 10 MeV. In the present study, by taking into account the coupling with the jj-coupling shell model components and utilizing Tohsaki interaction, which is phenomenological but has finite-range three-body interaction terms, we show that consistent understanding of these nuclei can be achieved. The original Tohsaki interaction gives small overbound of about 3 MeV for 16O, and this is improved by slightly modifying three-body Majorana exchange parameter. Also, the coupling with the jj-coupling shell model wave function strongly contributes to the increase of the binding energy of 12C. So far the application of...
A High-Level Functional Architecture for GNSS-Based Road Charging Systems
DEFF Research Database (Denmark)
Zabic, Martina
2011-01-01
Within recent years, GNSS-based road charging systems have been highly profiled on the policy makers’ agenda. These types of systems are however technically challenging and are considered one of the most complex types of charging systems. To understand the structure and behavior of such road...... charging systems, it is important to highlight the overall system architecture which is the framework that defines the basic functions and important concepts of the system. This paper presents a functional architecture for GNSS-based road charging systems based on the concepts of system engineering. First......, a short introduction is provided followed by a presentation of the system engineering methodology to illustrate how and why system architectures can be beneficial for GNSS-based road charging systems. Hereafter, a basic set of system functions is determined based on functional system requirements...
GNSS-based Road Charging Systems - Assessment of Vehicle Location Determination
DEFF Research Database (Denmark)
Zabic, Martina
function. The thesis provides a thorough review of the different GNSS-based trials and experiments conducted within recent years to assess the performance and possibilities of GNSSbased charging systems. In 2007–2009, a GNSS-based road charging experiment was conducted in Copenhagen as part of this...... research in cooperation with Siemens to assess the performance and technical challenges of GNSS-based road charging systems based on state of the art road charging technology. This thesis presents the experiment conducted and provides an assessment of the vehicle location determination function within GNSS......-based road charging systems. Previous trials and performance assessments of GNSS-based road charging systems have generally focused on the possibilities of the charging systems rather than on the impossibilities. Often it has not been clearly described which errors and shortages existed in the collected data...
Modeling energy and charge transports in pi-conjugated systems
Shin, Yongwoo
Carbon based pi-conjugated materials, such as conducting polymers, fullerene, carbon nanotubes, graphene, and conjugated dendrimers have attracted wide scientific attentions in the past three decades. This work presents the first unified model Hamiltonian that can accurately capture the low-energy excitations among all these pi-conjugated systems, even with the presence of defects and heterogeneous sites. Two transferable physical parameters are incorporated into the Su-Schrieffer-Heeger Hamiltonian to model conducting polymers beyond polyacetylene: the parameter gamma scales the electronphonon coupling strength in aromatic rings and the other parameter epsilon specifies the heterogeneous core charges. This generic Hamiltonian predicts the fundamental band gaps of polythiophene, polypyrrole, polyfuran, poly-(p-phenylene), poly-(p-phenylene vinylene), polyacenes, fullerene, carbon nanotubes, graphene, and graphene nanoribbons with an accuracy exceeding time-dependent density functional theory. Its computational costs for moderate-length polymer chains are more than eight orders of magnitude lower than first-principles approaches. The charge and energy transports along -conjugated backbones can be modeled on the adiabatic potential energy surface. The adiabatic minimum-energy path of a self-trapped topological soliton is computed for trans-polyacetylene. The frequently cited activation barrier via a ridge shift of the hyper-tangent order parameter overestimates its true value by 14 orders of magnitude. Self-trapped solitons migrate along the Goldstone mode direction with continuously adjusted amplitudes so that a small-width soliton expands and a large-width soliton shrinks when they move uphill. A soliton with the critical width may migrate without any amplitude modifications. In an open chain as solitons move from the chain center toward a chain edge, the minimum-energy path first follows a tilted washboard. Such a generic constrained Goldstone mode relaxation
International Nuclear Information System (INIS)
The transition temperature, the depletion of the condensate atoms and the collective excitations of a Bose–Einstein condensation (BEC) with two- and three-body interactions in an anharmonic trap at finite temperature are studied in detail. By using the Popov version of the Hartree–Fock–Bogoliubov (HFB) approximation, an extended self-consistent model describing BEC with both two- and three-body interactions in a distorted harmonic potential at finite temperature is obtained and solved numerically. The results show that the transition temperature, the condensed atom number and the collective excitations are modified dramatically by the atomic three-body interactions and the distortion of the harmonic trap. (general)
Measurement of the reaction 3He(γ,pp)n and its relation to three-body forces
International Nuclear Information System (INIS)
The three-body photodisintegration of 3He has been measured at photon energies ranging from 90 to 250 MeV, in kinematic regions where three-body forces effects are expected to be maximized, and two-body mechanisms suppressed. The differential cross sections as a function of neutron momentum demonstrate that calculations using only one-body and two-body photoabsorption mechanisms cannot describe the data and that a two-pion-exchange, three-body absorption mechanism is needed to adequately describe the data
Critical Success Factors for Implementing Road Charging Systems
Oehry, Bernhard
2010-01-01
Road user charging is used as an 'umbrella' term to describe a wide range of applications of pricing roads and infrastructure. Road user charging includes a number of charging measures that governments and other road owners use to: i) finance new or maintain existing road infrastructure ii) manage traffic (e.g. reduce congestion) iii) minimise environmental impacts of transport iv) internalise the external costs of road transport caused, e.g., by pollution and noise emissions. Historically, t...
Study and Implementation on Batteries Charging Method of Micro-Grid Photovoltaic Systems
Tiezhou Wu; Qing Xiao; Linzhang Wu; Jie Zhang; Mingyue Wang
2011-01-01
In the micro-grid photovoltaic systems, the random changes of solar radiation enable lead-acid batteries to experience low SOC (State of Charge) or overcharged for periods of time if directly charged with such traditional methods as decreased charging current, which will reduce lifetime of batteries. What’s more, it’s difficult to find a proper reduction coefficient in decreasing charging current. To adapt to the random changes of circumstance and avoid selecting the reduction coefficient, a ...
International Nuclear Information System (INIS)
We explain how the modulational and oscillatory instabilities can be generated in Bose–Einstein condensates (BECs) with two- and three-body interactions trapped in a periodic optical lattice with driving harmonic potential. We solve a cubic–quintic Gross–Pitaevskii (GP) equation with external trapping potentials by using both analytical and numerical methods. Using the time-dependent variational approach, we derive and analyze the variational equations for the time evolution of the amplitude and phase of modulational perturbation, and effective potential of the system. Through the effective potential, we obtain the modulational instability condition of the BECs with two- and three-body interactions and shown the effects of the optical potential on the dynamics of the system. We perform direct numerical simulations to support our analytical results, and good agreement is observed. - Highlights: • A cubic–quintic Gross–Pitaevskii equation with optical lattice (OL) and harmonic potentials is used. • We find the stability domain and time-dependent criteria for modulational instability. • Matter waves are generated through the modulational and oscillatory instabilities for four different possible cases. • Tuning the strength of OL shrinks and grows the bandwidth of unstable wave numbers. • In condensates with two- and three-body interactions, oscillatory instability can be realized
Energy Technology Data Exchange (ETDEWEB)
Sabari, S. [Department of Physics, Pondicherry University, Puducherry-605014 (India); Porsezian, K., E-mail: ponzsol@yahoo.com [Department of Physics, Pondicherry University, Puducherry-605014 (India); Murali, R. [Photonics, Nuclear and Medical Physics Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu (India)
2015-02-06
We explain how the modulational and oscillatory instabilities can be generated in Bose–Einstein condensates (BECs) with two- and three-body interactions trapped in a periodic optical lattice with driving harmonic potential. We solve a cubic–quintic Gross–Pitaevskii (GP) equation with external trapping potentials by using both analytical and numerical methods. Using the time-dependent variational approach, we derive and analyze the variational equations for the time evolution of the amplitude and phase of modulational perturbation, and effective potential of the system. Through the effective potential, we obtain the modulational instability condition of the BECs with two- and three-body interactions and shown the effects of the optical potential on the dynamics of the system. We perform direct numerical simulations to support our analytical results, and good agreement is observed. - Highlights: • A cubic–quintic Gross–Pitaevskii equation with optical lattice (OL) and harmonic potentials is used. • We find the stability domain and time-dependent criteria for modulational instability. • Matter waves are generated through the modulational and oscillatory instabilities for four different possible cases. • Tuning the strength of OL shrinks and grows the bandwidth of unstable wave numbers. • In condensates with two- and three-body interactions, oscillatory instability can be realized.
Three-body abrasive wear behaviour of carbon and glass fiber reinforced epoxy composites
International Nuclear Information System (INIS)
Three-body abrasive wear behaviour of carbon-epoxy (C-E) and glass-epoxy (G-E) composites has been investigated. The effect of abrading distance, viz., 270, 540, 810 and 1080 m and different loads of 22 and 32 N at 200 rpm have been studied. The wear volume loss and specific wear rate as a function of load and abrading distance were determined. The wear volume loss increases with increasing load/abrading distance. However, the specific wear rate decreases with increase in abrading distance and increases with the load. However, C-E composite showed better abrasion wear resistance compared to G-E composite. The worn surface features have been examined using scanning electron microscope (SEM). SEM micrographs of abraded composite specimens revealed the high percentage of broken glass fiber compared to carbon fiber and also better interfacial adhesion between epoxy and carbon fiber
Selected two- and three-body electroweak processes with improved chiral forces
Skibinski, R; Topolnicki, K; Witala, H; Epelbaum, E; Kamada, H; Krebs, H; Meissner, Ulf-G; Nogga, A
2016-01-01
The recently developed semi-local improved chiral nucleon-nucleon interaction is used for the first time to study several electromagnetic and weak processes at energies below the pion production threshold. Cross sections and selected polarization observables for deuteron photodisintegration, nucleon-deuteron radiative capture, three-body 3He photodisintegration as well as capture rates for decays of the muonic 2H and 3He atoms are calculated. The Lippmann-Schwinger and Faddeev equations in momentum space are solved to obtain nuclear states. The electromagnetic current operator is taken as a single nucleon current supplemented by many-body contributions induced via the Siegert theorem. For muon capture processes the nonrelativistic weak current together with the dominant relativistic corrections is used. Our results compare well with experimental data, demonstrating the same quality as is observed for the semi-phenomenological AV18 potential. Compared to the older version of the chiral potential with a nonloca...
Microscopic optical potential with two and three body forces for nucleon–nucleus scattering
Directory of Open Access Journals (Sweden)
Gambhir Y.K.
2014-03-01
Full Text Available The proton - nucleus optical potentials generated by folding the calculated complex, density and energy dependent g- matrices (with and without three-body forces (TBF: Urbana IX (UVIX and TNI over the target nucleon density distributions obtained from the relativistic mean field theory, are used for the calculation of the differential cross section dσ / dθ , polarization Ay , spin rotation function (Q. for 65 and 200 MeV polarized proton incident on 40Ca and 208Pb . The agreement with the experiment is rather impressive. It is found that the inclusion of TBF (Urbana IX UVIX and TNI reduces the strength of the central part of the optical potential in the nuclear interior and affects the calculated spin-orbit potential only marginally and leads to an improvement in the agreement with the corresponding experimental results.
K operators and unitary approximations for the three-body problem
International Nuclear Information System (INIS)
The method of channel coupling arrays is used as a means to introduce unitary approximations for the three-body problem. First, the transition operators defined by the channel coupling array equations are shown to obey the correct (on-shell) discontinuity equations. Next, K (reaction) operators are defined by using principal value Green's functions in the channel coupling array equations. These operators are then shown to be related to the transition operators by a damping equation which leads to the correct discontinuity relation. This development provides the basis for introducing unitary approximations, since any set of K operators having zero discontinuity will yield, through the damping equation, a set of transition operators having the proper singularity structure. The use of the channel coupling array method achieves this result without the need for introducing an intermediate hierarchy of operators, as in other approaches
Three-body coupled-channel theory of scattering and breakup of light and heavy ions
International Nuclear Information System (INIS)
It is shown that the method of coupled discretized continuum channels (CDCC) based on the three-body model for direct reactions is very successful in explaining the following, recently developed experiments using deuteron, 6Li and 7Li projectiles whose breakup threshold energies are very low: (i) Precise measurement of all the possible analyzing powers in elastic scattering of polarized deuteron at 56 MeV, (ii) scattering of polarized deuteron at intermediate energies, (iii) deuteron projectile breakup at 56 MeV, (iv) scattering of polarized 7Li at 20 and 44 MeV and (v) projectile breakup of 6Li at 178 MeV and 7Li at 70 MeV. The CDCC analyses of those data are made transparently with no adjustable parameters. (author)
Casimir micro-sphere diclusters and three-body effects in fluids
Varela, Jaime; McCauley, Alexander P; Johnson, Steven G
2010-01-01
Our previous article [Phys. Rev. Lett. 104, 060401 (2010)] predicted that Casimir forces induced by the material-dispersion properties of certain dielectrics can give rise to stable configurations of objects. This phenomenon was illustrated via a dicluster configuration of non-touching objects consisting of two spheres immersed in a fluid and suspended against gravity above a plate. Here, we examine these predictions from the perspective of a practical experiment and consider the influence of non-additive, three-body, and nonzero-temperature effects on the stability of the two spheres. We conclude that the presence of Brownian motion reduces the set of experimentally realizable silicon/teflon spherical diclusters to those consisting of layered micro-spheres, such as the hollow- core (spherical shells) considered here.
Sultanov, Renat A.; Guster, D.; Adhikari, S. K.
2015-12-01
A bound state of a proton, p, and its counterpart antiproton, {barp}, is a protonium atom {Pn = (barp p)}. The following three-charge-particle reaction: {barp +(p μ^-)_{1s} → (barp {p})_{1s} + μ^-} is considered in this work, where {μ^-} is a muon. At low-energies muonic reaction {Pn} can be formed in the short range state with α = 1 s or in the first excited state: α = 2 s/2 p, where {barp} and p are placed close enough to each other and the effect of the {barp}-p nuclear interaction becomes significantly stronger. The cross sections and rates of the Pn formation reaction are computed in the framework of a few-body approach based on the two-coupled Faddeev-Hahn-type (FH-type) equations. Unlike the original three-body Faddeev method the FH-type equation approach is formulated in terms of only two but relevant components: {{Ψ}_1} and {Ψ_2}, of the system's three-body wave function {Ψ}, where {{Ψ}={Ψ}_1+{Ψ}_2}. In order to solve the FH-type equations {Ψ_1} is expanded in terms of the input channel target eigenfunctions, i.e. in this work in terms of the {({p} μ^-)} eigenfunctions. At the same time {Ψ_2} is expanded in terms of the output channel two-body wave function, that is in terms of the protonium {(bar{{p}} {p})} eigenfunctions. A total angular momentum projection procedure is performed, which leads to an infinite set of one-dimensional coupled integral-differential equations for unknown expansion coefficients.
Charge symmetry breaking in the neutron proton system
International Nuclear Information System (INIS)
Two consequences of charge symmetry breaking (CSB) in the n-p system are examined. In n-p elastic scattering, CSB nuclear forces cause a difference between the polarizations of the neutron and the proton scattered in opposite directions in the center of mass system. The expected differences in polarizations due to one boson exchanges, particularly a photon exchange, isospin mixed mesons, and a pion (with the n-p mass difference taken into account), are computed. The calculated polarization difference is typically of the order of several tenths of a percent. In np → dπ0, the CSB of nuclear forces can be tested by measuring the asymmetry of the angular distribution of deuterons about 900 in the center of mass frame. The expected asymmetry is calculated for one boson exchange CSB mechanisms, as in the elastic scattering. The asymmetry caused by the mixed n-π0 exchange is dominant, but all of the mechanisms contribute asymmetries with similar angular dependences. The maximum assymmetry is about 0.8% at 0; the average is about 0.2%
Quantum criticality and superconductivity in spin and charge systems
International Nuclear Information System (INIS)
Full text: This talk will focus on experimental search and discovery of novel forms of quantum order in metallic and insulating magnets, intercalated compounds, ferroelectric systems and multi-ferroic materials. Particularly discussed will be the pressure-induced superconductivity and critical phenomena in the vicinity of quantum phase transitions. Materials tuned to the neighbourhood of a zero temperature phase transition often show the emergence of novel quantum phenomena. Much of the effort to study these new emergent effects, like the breakdown of the conventional Fermi-liquid theory in metals has been focused in narrow band electronic systems. Spin or Charge ordered phases can be tuned to absolute zero using hydrostatic pressure. Close to such a zero temperature phase transition, physical quantities like resistivity, magnetisation and dielectrics constant change into radically unconventional forms due to the fluctuations experienced in this region giving rise to new kind superconductivity and other possible ordered states. Extension of this methodology to dipole-ordered insulating materials provides an interesting departure and new opportunities for both new physics and applications. (author)
Charge symmetry breaking in the neutron-proton system
International Nuclear Information System (INIS)
Two consequences of charge symmetry breaking (CSB) in the n-p system are examined. In n-p elastic scattering, CSB nuclear forces cause a difference between the polarizations of the neutron and the proton scattered in opposite directions in the center of mass system. The expected differences in polarizations due to one-boson exchanges, particulary a photon exchange, isospin mixed mesons, and a pion (with the n-p mass difference taken into account), are computed. The calculated polarization difference is typically of the order of several tenths of a percent. In np → dπ0, the CSB of nuclear forces can be tested by measuring the asymmetry of the angular distribution of deuterons about 900 in the center of mass frame. The expected asymmetry is calculated for one-boson exchange CSB mechanisms, as in the elstic scattering. The asymmetry caused by the mixed eta-π0 exchange is dominant, but all of the mechanisms contribute asymmetries with similar angular dependences. The maximum asymmetry is about 0.8% at 00; the average is about 0.2%. (orig.)
Solving the three-body Coulomb breakup problem using exterior complex scaling
Energy Technology Data Exchange (ETDEWEB)
McCurdy, C.W.; Baertschy, M.; Rescigno, T.N.
2004-05-17
Electron-impact ionization of the hydrogen atom is the prototypical three-body Coulomb breakup problem in quantum mechanics. The combination of subtle correlation effects and the difficult boundary conditions required to describe two electrons in the continuum have made this one of the outstanding challenges of atomic physics. A complete solution of this problem in the form of a ''reduction to computation'' of all aspects of the physics is given by the application of exterior complex scaling, a modern variant of the mathematical tool of analytic continuation of the electronic coordinates into the complex plane that was used historically to establish the formal analytic properties of the scattering matrix. This review first discusses the essential difficulties of the three-body Coulomb breakup problem in quantum mechanics. It then describes the formal basis of exterior complex scaling of electronic coordinates as well as the details of its numerical implementation using a variety of methods including finite difference, finite elements, discrete variable representations, and B-splines. Given these numerical implementations of exterior complex scaling, the scattering wave function can be generated with arbitrary accuracy on any finite volume in the space of electronic coordinates, but there remains the fundamental problem of extracting the breakup amplitudes from it. Methods are described for evaluating these amplitudes. The question of the volume-dependent overall phase that appears in the formal theory of ionization is resolved. A summary is presented of accurate results that have been obtained for the case of electron-impact ionization of hydrogen as well as a discussion of applications to the double photoionization of helium.
Institute of Scientific and Technical Information of China (English)
胡继敏; 金家善; 严志腾
2013-01-01
The thermodynamic charge performance of a variable-mass thermodynamic system was investigated by the simulation modeling and experimental analysis. Three sets of experiments were conducted for various charge time and charge steam flow under three different control strategies of charge valve. Characteristic performance parameters from the average sub-cooled degree and the charging energy coefficient point of views were also defined to evaluate and predict the charge performance of system combined with the simulation model and experimental data. The results show that the average steam flow reflects the average sub-cooled degree qualitatively, while the charging energy coefficients of 74.6%, 69.9% and 100% relate to the end value of the average sub-cooled degree at 2.1, 2.9 and 0 respectively for the three sets of experiments. The mean and maximum deviations of the results predicted from those by experimental data are smaller than 6.8% and 10.8%, respectively. In conclusion, the decrease of average steam flow can effectively increase the charging energy coefficient in the same charge time condition and therefore improve the thermodynamic charge performance of system. While the increase of the charging energy coefficient by extending the charge time needs the consideration of the operating frequency for steam users.
Properties of three-body decay functions derived with time-like jet calculus beyond leading order
International Nuclear Information System (INIS)
Three-body decay functions in time-like parton branching are calculated using the jet calculus to the next-to-leading logarithmic (NLL) order in perturbative quantum chromodynamics (QCD). The phase space contributions from each of the ladder diagrams and interference diagrams are presented. We correct part of the results for the three-body decay functions calculated previously by two groups. Employing our new results, the properties of the three-body decay functions in the regions of soft partons are examined numerically. Furthermore, we examine the contribution of the three-body decay functions modified by the restriction resulting from the kinematical boundary of the phase space for two-body decay in the parton shower model. This restriction leads to some problems for the parton shower model. For this reason, we propose a new restriction introduced by the kinematical boundary of the phase space for two-body decay. (author)
Thermonuclear processes for three body system in the potential cluster model
Energy Technology Data Exchange (ETDEWEB)
Dubovichenko, S.B., E-mail: dubovichenko@mail.ru; Dzhazairov-Kakhramanov, A.V., E-mail: albert-j@yandex.ru
2015-09-15
The manuscript is devoted to the description of the results obtained in the frame of the modified potential cluster model with the classification of states according to Young tableaux for neutron and proton radiative capture processes on {sup 2}H at thermal and astrophysical energies. It demonstrates methods of application that were obtained on the basis of phase shift analysis and characteristics of the bound states of {sup 2}H potentials for consideration of the radiative capture processes. The first reaction of the proton capture takes part directly in the pp solar cycle, where the second reaction occurs. The neutron capture is not part of usual thermonuclear cycles in the Sun and stars, but can take part in the processes of primordial nucleosynthesis, following at formation and evolution of our entire Universe.
Hummer, G; Neumann, M; Hummer, Gerhard; Gr{ø}nbech-Jensen, Niels; Neumann, Martin
1998-01-01
Ewald summation and physically equivalent methods such as particle-mesh Ewald, kubic-harmonic expansions, or Lekner sums are commonly used to calculate long-range electrostatic interactions in computer simulations of polar and charged substances. The calculation of pressures in such systems is investigated. We find that the virial and thermodynamic pressures differ because of the explicit volume dependence of the effective, resummed Ewald potential. The thermodynamic pressure, obtained from the volume derivative of the Helmholtz free energy, can be expressed easily for both ionic and rigid molecular systems. For a system of rigid molecules, the electrostatic energy and the forces at the atom positions are required, both of which are readily available in molecular dynamics codes. We then calculate the virial and thermodynamic pressures for the extended simple point charge (SPC/E) water model at standard conditions. We find that the thermodynamic pressure exhibits considerably less system size dependence than t...
Distribution of Electric Charge in a System of Charged Conductors of Finite Dimensions
Czech Academy of Sciences Publication Activity Database
Doležel, Ivo; Dvořák, P.; Šolín, Pavel; Ulrych, B.
Ostrava : VŠB Technická univerzita Ostrava, 2003, s. -. ISBN 80-248-0225-2. [International Scientific Conference /5./. Beskydy - Visalaje (CZ), 28.01.2003-29.01.2003] R&D Projects: GA ČR GA102/00/0933 Institutional research plan: CEZ:AV0Z2057903 Keywords : distribution of electric charge * finite dimensions Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
Design of achromatic bending systems in the presence of space charge
International Nuclear Information System (INIS)
The usual conditions for achromaticity of a dispersive system are shown to be inadequate when space-charge effects are included. Using a matrix formulation describing linear space-charge forces, we give generalized criteria necessary for a system to be achromatic. Additionally, these conditions are necessary for conservation of transverse emittances. An example of such a system is given
75 FR 18255 - Passenger Facility Charge Database System for Air Carrier Reporting
2010-04-09
... Federal Aviation Administration Passenger Facility Charge Database System for Air Carrier Reporting AGENCY... interested parties of the availability of the Passenger Facility Charge (PFC) database system to report PFC... public agency. The FAA has developed a national PFC database system in order to more easily track the...
Battery-powered transport systems. Possible methods of automatically charging drive batteries
Energy Technology Data Exchange (ETDEWEB)
1981-03-01
In modern driverless transport systems, not only easy maintenance of the drive battery is important but also automatic charging during times of standstill. Some systems are presented; one system is pointed out in particular in which 100 batteries can be charged at the same time.
Yamada, Kei
2015-01-01
Continuing work initiated in an earlier publication [H. Asada, Phys. Rev. D {\\bf 80}, 064021 (2009)], the gravitational radiation reaction to Lagrange's equilateral triangular solution of the three-body problem is investigated in an analytic method. The previous work is based on the energy balance argument, which is sufficient for a two-body system because the number of degrees of freedom (the semi-major axis and the eccentricity in quasi-Keplerian cases for instance) equals to that of the constants of motion such as the total energy and the orbital angular momentum. In a system with three (or more) bodies, however, the number of degrees of freedom is more than that of the constants of motion. Therefore, the present paper discusses the evolution of the triangular system by directly treating the gravitational radiation reaction force to each body. The perturbed equations of motion are solved by using the Laplace transform technique. It is found that the triangular configuration is adiabatically shrinking and k...
Formation of three-body entanglement via a vacuum optical cavity induction in Tavis-Cummings model
Institute of Scientific and Technical Information of China (English)
Li Yu-Liang; Li Xue-Mei
2008-01-01
After briefly introducing Akhtarshenas, concurrence vector and subvector for describing many-body entanglement,we investigate the entanglement formation for a system which contains three bodies, i.e. two identical atoms and a single model cavity field, in the Tavis-Cummings model by calculating the concurrences. The results show that the coupling strength between two atoms, the decay cavity and the atomic spontaneous emission can change the entanglement of formation according to different modes: these factors destroy periodicity and symmetry of all concurrences, and that the coupling strength of two atoms does not change the peak value of concurrence (C), but the strength of decay cavity and the atomic spontaneous emission decline in the peak value of concurrence (C) and the latter is more serious than the former under the same strengths. The concurrence vector and subvector are a useful measure of entanglement for a pure state of the many-body system, in that it can give novel pictures about the entanglements for the entire system and between its inner bodies.
N-reactor charge-discharge system analysis
International Nuclear Information System (INIS)
This report documents an analysis of the existing systems in the N-Reactor fuel flow path. It recommends equipment improvements and changes in that path to allow the charge-discharge rates to be increased to 500 tubes per outage without increasing reactor outage time. The estimated program cost of $14 million is projected over an estimated 3-year period. It does not include costs detailed as part of the existing restoration program or any costs that are considered as normal maintenance. The recommendations contained in this report provide a direction and goal for every critical aspect of the fuel flow path. The way in which these recommendations are implemented may greatly affect the schedule and costs. Previous studies by UNC have shown that enhanced fuel element handling has the potential of increasing productivity by 33 days at a cost benefit estimated at $18 million per year. Enhanced fuel handling provides the greatest potential for productivity improvement of any of the areas considered in these studies
Use of Super-Capacitor to Enhance Charging Performance of Stand-Alone Solar PV System
Huang, B. J.
2011-01-01
Introduction: The battery charging performance in a stand-alone solar PV system affects the PV system efficiency and the load operating time. The New Energy Center of National Taiwan University has been devoted to the development of a PWM charging technique to continue charging the lead-acid battery after the overcharge point to increase the battery storage capacity by more than 10%. The present study intends to use the super-capacitor to further increase the charge capacity before the overcharge point of the battery. The super-capacitor is connected in parallel to the lead-acid battery. This will reduce the overall charging impedance during the charge and increase the charging current, especially in sunny weather. A system dynamics model of the lead-acid battery and super-capacitor was derived and the control system simulation was carried out to predict the charging performance for various weathers. It shows that the overall battery impedance decreases and charging power increases with increasing solar radiation. An outdoor comparative test for two identical PV systems with and without supercapacitor was carried out. The use of super-capacitor is shown to be able to increase the lead-acid charging capacity by more than 25% at sunny weather and 10% in cloudy weather. © Springer-Verlag Berlin Heidelberg 2011.
Congestion charge as the regulatory tool of a transport system
Chlaň, Alexander; Lejsková, Pavla
2010-01-01
Congestion increases private transport costs and contributes to the decline of public transport service. While these two phenomena are logically connected, in most cities they are institutionally and financially separated. In principle, vehicular users of congested urban road space should be charged a price at least equal to the short-run marginal cost of use, including congestion, road wear and tear, and environmental impacts. Charging for road infrastructure is the core of a strategy ...
International Nuclear Information System (INIS)
The level ordering problem in the light halo nucleus 11Be is studied within the three body 9Be(1/2+) +n+n cluster model with the excited core by using a high-accuracy variational method on a Gaussian basis. The energy value and RMS charge and matter radii of the 11Be ground state are reproduced with parity- and spin-independent S-wave 9Be(1/2+)+n potential. The parameters of the potential are fitted to reproduce the excited 10Be(0+2) state energy value. The NN interaction is fixed as a RSC potential. With the additional parity dependent forces, yielding an attraction in odd waves about two times stronger than in even waves, we have reproduced the excited 11Be(1/2-) state energy value. By examining the energy behavior of the positive and negative parity levels in dependence on the parity- and spin-dependent core+n potentials, we found that in the three-body cluster model the energy reverse problem does not occur in contrast to the shell-model picture. (authors)
Fluctuations of general charge in soliton anti-soliton systems
International Nuclear Information System (INIS)
Full text: The interest in the investigation of non-integer charge has become stronger in quantum field theory since the original work of R.Jackiw and C.Rebbi [ R.Jackiw and C.Rebbi, Phys.Rev.D13,3398(1976)]. This charge conjugation symmetric (1+1)D model, with a soliton anti-soliton background, predicts e/2 as an eigenvalue of the charge operator and has been used to describe properties of polyacetylene. This interesting description was achieved by noting that the material consists in linear chains of carbon atoms, whose positions can be mapped in the background field. This fields suffer a breaking of symmetry in such a way that the new bound state is not symmetric but localized at the new soliton position, i.e., about 0,04 Ansgrongs from the original position. The concept of fractionary charge has been reinforced by showing that there are no charge fluctuations, which means that this is a good quantum number. These ideas opened a door for investigations in condensed matter using,as a tool,quantum field theory. Further experimental evidences for this effect have appeared recently and the discussion of fractionalization in (1+1) has been done also on the phenomenological sense by the authors of [E.Berg, Y.Oreg, E.-A.Kim, and F.von Oppen, Phys.Rev.Lett. 102,236402(2009)], who proposed a way to measure this kind of effect. It is very natural that variations of the original models predict a much richer spectrum of possibilities. The simplest generalization is to include breaking of charge conjugation in Jackiws first proposal, as was done by R.Jackiw and G.Semenoff [Phys.Rev.Lett. 50,439(1983)], in which general non-integer charges were obtained. J.Goldstone and F.Wilczek [Phys.Rev.Lett. 47,986(1981)] showed a general method for computing the charge and used to study the same problem in two and four dimensions. Until now, however, it is still missing an investigation on charge fluctuations within models without charge conjugations symmetry. To perform this
A compact, high-voltage pulsed charging system based on an air-core pulse transformer.
Zhang, Tianyang; Chen, Dongqun; Liu, Jinliang; Liu, Chebo; Yin, Yi
2015-09-01
Charging systems of pulsed power generators on mobile platforms are expected to be compact and provide high pulsed power, high voltage output, and high repetition rate. In this paper, a high-voltage pulsed charging system with the aforementioned characteristics is introduced, which can be applied to charge a high-voltage load capacitor. The operating principle of the system and the technical details of the components in the system are described in this paper. The experimental results show that a 600 nF load capacitor can be charged to 60 kV at 10 Hz by the high-voltage pulsed charging system for a burst of 0.5 s. The weight and volume of the system are 60 kg and 600 × 500 × 380 mm(3), respectively. PMID:26429466
Design Considerations for Wireless Charging Systems with an Analysis of Batteries
Directory of Open Access Journals (Sweden)
Zhenshi Wang
2015-09-01
Full Text Available Three criteria, including charging time, effective charging capacity and charging energy efficiency, are introduced to evaluate the CC (constant current and CC/CV (constant current/constant voltage charging strategies. Because the CC strategy presents a better performance and most resonant topologies have the CC characteristic, the CC strategy is more suitable for the design of wireless charging systems than the CC/CV strategy. Then, the state space model of the receiver is built to study the system dynamic characteristics, and the design of nonuse output filter capacitors is proposed, which can improve the system power density and avoid the drop in efficiency caused by capacitor degradation. At last, an electrochemical impedance spectrum (EIS based analysis method is introduced to validate that the design without output filter capacitors has no effects on the battery characteristics when the charging frequency is higher than 460 Hz. A prototype is fabricated to verify our research results.
Studies of continuum states in${16}$ Ne using three-body correlation techniques
Marganiec, J; Aksouh, F; Aksyutina, Yu; Alvarez-Pol, H; Aumann, T; Beceiro-Novo, S; Boretzky, K; Borge, M J G; Chartier, M; Chatillon, A; Chulkov, L V; Cortina-Gil, D; Emling, H; Ershova, O; Fraile, L M; Fynbo, H O U; Galaviz, D; Geissel, H; Heil, M; Hoffmann, D H H; Hoffmann, J; Johansson, H T; Jonson, B; Karagiannis, C; Kiselev, O A; Kratz, J V; Kulessa, R; Kurz, N; Langer, C; Lantz, M; Le Bleis, T; Lemmon, R; Litvinov, Yu A; Mahata, K; Müntz, C; Nilsson, T; Nociforo, C; Nyman, G; Ott, W; Panin, V; Paschalis, S; Perea, A; Plag, R; Reifarth, R; Richter, A; Rodriguez-Tajes, C; Rossi, D; Riisager, K; Savran, D; Schrieder, G; Simon, H; Stroth, J; Sümmerer, K; Tengblad, O; Weick, H; Wiescher, M; Wimmer, C; Zhukov, M V
2015-01-01
Two-proton decay of the unbound $ T_{z} =-2$ nucleus$^{16}$Ne , produced in one-neutron knockout from a 500 MeV/u$^{17}$Ne beam, has been studied at GSI. The ground state, at a resonance energy 1.388(15) MeV, ( $ \\Gamma =0.082(15)$ MeV) above the$^{14}$O +p+p threshold, and two narrow resonances at $ E_{r} =3.220(46)$ MeV and 7.57(6) MeV have been investigated. A comparison of the energy difference between the first excited 2$^{+}$ state and the 0$^{+}$ ground state in$^{16}$Ne with its mirror nucleus$^{16}$C reveals a small Thomas-Ehrman shift (TES) of $ +70(46)$ keV. A trend of the TES for the T = 2 quintet is obtained by completing the known data with a prediction for$^{16}$F obtained from an IMME analysis. The decay mechanisms of the observed three resonances were revealed from an analysis of the energy and angular correlations of the$^{14}$O +p+p decay products. The ground state decay can be considered as a genuine three-body (democratic) mode and the excited states decay sequentially via states in the i...
Analytical Structure Matching and Very Precise Approach to the Coulombic Quantum Three-Body Problem
Institute of Scientific and Technical Information of China (English)
TAN Shi-Na
2001-01-01
A powerful approach to solve the Coulombic quantum three-body problem is proposed. The approach is exponentially convergent and more efficient than the hypcrsphcrical coordinate method and the correlation-function hyperspherical harmonic method. This approach is numerically competitive with the variational methods, such as that using the Hylleraas-type basis functions. Numerical comparisons are made to demonstrate the efficiency of this approach, by calculating the nonrelativistic and infinite-nuclear-mass limit of the ground state energy of the helium atom. The exponential convergency of this approach is due to the full matching between the analytical structure of the basis functions that are used in this paper and the true wavefunction. This full matching was not reached by most other methods. For example, the variational method using the Hylleraas-type basis does not reflects the logarithmic singularity of the true wavefunction at the origin as predicted by Bartlett and Fock. Two important approaches are proposed in this work to reach this full matching: the coordinate transformation method and the asymptotic series method. Besides these, this work makes use of the lcast square method to substitute complicated numerical integrations in solving the Schrodinger equation without much loss of accuracy, which is routinely used by people to fit a theoretical curve with discrete experimental data, but here is used to simplify thc computation.``
A study on basic theory for CDCC method for three-body model of deuteron scattering
International Nuclear Information System (INIS)
Recent studies have revealed that the CDCC method is valid for treating the decomposition process involved in deuteron scattering on the basis of a three-body model. However, theoretical support has not been developed for this method. The present study is aimed at determining whether a solution by the CDCC method can be obtained 'correctly' from a 'realistic' model Hamiltonian for deuteron scattering. Some researchers have recently pointed out that there are some problems with the conventional CDCC calculation procedure in view of the general scattering theory. These problems are associated with asymptotic froms of the wave functions, convergence of calculations, and boundary conditions. Considerations show that the problem with asymptotic forms of the wave function is not a fatal defect, though some compromise is necessary. The problem with the convergence of calculations is not very serious either. Discussions are made of the handling of boundary conditions. Thus, the present study indicates that the CDCC method can be applied satisfactorily to actual deuteron scattering, and that the model wave function for the CDCC method is consistent with the model Hamiltonian. (Nogami, K.)
The role of three-body interactions in two-dimensional polymer collapse
Bedini, A.; Owczarek, A. L.; Prellberg, T.
2016-05-01
Various interacting lattice path models of polymer collapse in two dimensions demonstrate different critical behaviours. This difference has been without a clear explanation. The collapse transition has been variously seen to be in the Duplantier–Saleur θ-point university class (specific heat cusp), the interacting trail class (specific heat divergence) or even first-order. Here we study via Monte Carlo simulation a generalisation of the Duplantier–Saleur model on the honeycomb lattice and also a generalisation of the so-called vertex-interacting self-avoiding walk model (configurations are actually restricted trails known as grooves) on the triangular lattice. Crucially for both models we have three- and two-body interactions explicitly and differentially weighted. We show that both models have similar phase diagrams when considered in these larger two-parameter spaces. They demonstrate regions for which the collapse transition is first-order for high three-body interactions and regions where the collapse is second order. We conjecture a higher order multiple critical point separating these two types of collapse. It remains to be tested whether the second order lines in both models are in the Duplantier–Saleur θ-point university class for all values of the parameters. Dedicated to Professor Tony Guttmann on the occasion of his 70th birthday.
AMS-02 Positron Excess and Indirect Detection of Three-body Decaying Dark Matter
Cheng, Hsin-Chia; Huang, Xiaoyuan; Low, Ian; Tsai, Yue-Lin Sming; Yuan, Qiang
2016-01-01
We consider indirect detection of meta-stable dark matter particles decaying into a stable neutral particle and a pair of standard model fermions. Due to the softer energy spectra from the three-body decay, such models could potentially explain the AMS-02 positron excess without being constrained by the Fermi-LAT gamma-ray data and the cosmic ray anti-proton measurements. We scrutinize over different final state fermions, paying special attention to handling of the cosmic ray background and including various contributions from cosmic ray propagation with the help of the \\textsc{LikeDM} package. It is found that primary decays into an electron-positron pair and a stable neutral particle could give rise to the AMS-02 positron excess and, at the same time, stay unscathed against the gamma-ray and anti-proton constraints. Decays to a muon pair or a mixed flavor electron-muon pair may also be viable depending on the propagation models. Decays to all other standard model fermions are severely disfavored.
Two-body and three-body contacts for identical Bosons near unitarity.
Smith, D Hudson; Braaten, Eric; Kang, Daekyoung; Platter, Lucas
2014-03-21
In a recent experiment with ultracold trapped Rb85 atoms, Makotyn et al. studied a quantum-degenerate Bose gas in the unitary limit where its scattering length is infinitely large. We show that the observed momentum distributions are compatible with a universal relation that expresses the high-momentum tail in terms of the two-body contact C2 and the three-body contact C3. We determine the contact densities for the unitary Bose gas with number density n to be C2 ≈ 20 n(4/3) and C3 ≈ 2n(5/3). We also show that the observed atom loss rate is compatible with that from 3-atom inelastic collisions, which gives a contribution proportional to C3, but the loss rate is not compatible with that from 2-atom inelastic collisions, which gives a contribution proportional to C2. We point out that the contacts C2 and C3 could be measured independently by using the virial theorem near and at unitarity, respectively. PMID:24702333
International Nuclear Information System (INIS)
State-selected DC sliced images of propenal photodissociation show clear signatures of a novel synchronous concerted three-body dissociation of propenal recently proposed by Lee and co-workers to give C2H2 + H2 + CO [S. H. Lee, C. H. Chin, C. Chaudhuri, ChemPhysChem 12, 753 (2011)]. Unlike any prior example of a concerted 3-body dissociation event, this mechanism involves breaking three distinct bonds and yields 3 distinct molecules. DC sliced images of CO fragments were recorded for a range of rotational levels for both v = 0 and v = 1. The results show formation of two distinct CO product channels having dissimilar translational energy distributions with characteristic rovibrational state distributions. The images for CO (v = 0) show a large contribution of slower CO fragments at lower rotational levels (J = 5–25). This slow component is completely absent from the v = 1 CO images. The images for the higher rotational levels of the v = 0 and v = 1 CO are nearly identical, and this provides a basis for decomposing the two channels for v = 0. The quantum state and translational energy distributions for the slow channel are readily assigned to the 3-body dissociation based on the properties of the transition state. The faster CO fragments dominating the higher rotational levels in both v = 0 and v = 1 are attributed to formation of CH3CH + CO, also in agreement with the inferences based on previous non-state-resolved measurements with supporting theoretical calculations
40 CFR 35.2208 - Adoption of sewer use ordinance and user charge system.
2010-07-01
... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Adoption of sewer use ordinance and user charge system. 35.2208 Section 35.2208 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... § 35.2208 Adoption of sewer use ordinance and user charge system. The grantee shall adopt its sewer...
Same sign dimuon charge asymmetry in Bq0 - Bq0-bar system
International Nuclear Information System (INIS)
The recent observation of same-sign dimuon charge asymmetry (Aslb in the B meson decays by the DO collaboration has 3.9σ deviation from the Standard Model (SM) prediction. Any non-trivial contribution beyond the SM expectations is a signal of new physics (NP). The measured dimuon charge asymmetry is a linear combination of the individual flavor-specific charge asymmetries asls and asld in the Bs and Bd sectors respectively. The flavor-specific charge asymmetry is related to the mass and width difference in the Bq0 - B-barq0 system. In this paper, using the recent data on individual flavor-specific charge asymmetries, same-sign dimuon charge asymmetry is calculated. We find the same-sign dimuon charge asymmetry is enhanced from its SM value and provides signals for new physics beyond the SM. (author)
Hummer, Gerhard; Grønbech-Jensen, Niels; Neumann, Martin
1998-01-01
Ewald summation and physically equivalent methods such as particle-mesh Ewald, kubic-harmonic expansions, or Lekner sums are commonly used to calculate long-range electrostatic interactions in computer simulations of polar and charged substances. The calculation of pressures in such systems is investigated. We find that the virial and thermodynamic pressures differ because of the explicit volume dependence of the effective, resummed Ewald potential. The thermodynamic pressure, obtained from t...
Three-body (4He+n+n) description of halo nucleus 6He in the framework of Faddeev equations
International Nuclear Information System (INIS)
Full text: The halo nucleus 6 He is presumably made of a 4He core with a pair of weakly bound outer neutrons. The outer neutrons are spatially extended and have a large rms radius, forming a 'halo' cloud rimming the nucleus. Such nuclei are usually called 'halo nuclei' or 'Borromean nuclei' (see, for example, work [1] and references therein). From a theoretical point of view, the study of halo nuclei is of high interest. Comparison of the experimental data and the results of the theoretically calculated values of the fundamental characteristic for such nuclei could provide us new information about the two-particle (nucleon-nucleon, cluster-nucleon, cluster-cluster) nuclear interactions. In this study, we present the results for the values of the ground state energy and the rms radius of 6He obtained by solving Faddeev integral equations in momentum space by considering 6He nucleus as a three-body (α+n+n) system. In these calculations, we have used various forms for the NN- and αN- interaction models.The work is supported by F2-FA-F117 grant of Committee for Coordination Science and Technology Development under Cabinet of Ministers of Uzbekistan and by TUBITAK of Turkey under the grant No.111T275. (author) Reference: 1. M.V. Zhukov, B. Danilin, D.V. Fedorov, J.M. Bang, I.J. Thompson and J.S. Vaagan, Phys. Rep. 231, 151 (1993)
Indian Academy of Sciences (India)
Jagadish Singh; Joel John Taura
2014-06-01
We have examined the effects of oblateness up to 4 of the less massive primary and gravitational potential from a circum-binary belt on the linear stability of triangular equilibrium points in the circular restricted three-body problem, when the more massive primary emits electromagnetic radiation impinging on the other bodies of the system. Using analytical and numerical methods, we have found the triangular equilibrium points and examined their linear stability. The triangular equilibrium points move towards the line joining the primaries in the presence of any of these perturbations, except in the presence of oblateness up to 4 where the points move away from the line joining the primaries. It is observed that the triangular points are stable for 0 < < c and unstable for c ≤ ≤ $\\frac{1}{2}$, where c is the critical mass ratio affected by the oblateness up to 4 of the less massive primary, electromagnetic radiation of the more massive primary and potential from the belt, all of which have destabilizing tendencies, except the coefficient 4 and the potential from the belt. A practical application of this model could be the study of motion of a dust particle near a radiating star and an oblate body surrounded by a belt.
Interfacial Charge Transfer States in Condensed Phase Systems.
Vandewal, Koen
2016-05-27
Intermolecular charge transfer (CT) states at the interface between electron-donating (D) and electron-accepting (A) materials in organic thin films are characterized by absorption and emission bands within the optical gap of the interfacing materials. CT states efficiently generate charge carriers for some D-A combinations, and others show high fluorescence quantum efficiencies. These properties are exploited in organic solar cells, photodetectors, and light-emitting diodes. This review summarizes experimental and theoretical work on the electronic structure and interfacial energy landscape at condensed matter D-A interfaces. Recent findings on photogeneration and recombination of free charge carriers via CT states are discussed, and relations between CT state properties and optoelectronic device parameters are clarified. PMID:26980308
Institute of Scientific and Technical Information of China (English)
ZUO Wei; A.Lejeune; U.Lombardo; J.F.Mathiot
2003-01-01
The three-body force effects on the equation of state and its iso-spin dependence of asymmetric nuclearmatter and on the proton fraction in neutron star matter have been investigated within Brueckner-Hartree-Fock approachby using a microscopic three-body force. It is shown that, even in the presence of the three-body force, the empiricalparabolic law of the energy per nucleon vs. isospin asymmetry β＝ ( N - Z) /A is fulfilled in the whole asymmetry range0≤β≤1 and also up to high density. The three-body force provides a strong enhancement of symmetry energy at highdensity in agreement with relativistic approaches. It also shows that the three-body force leads to a much more rapidincreasing of symmetry energy with density in relatively high density region and to a much lower threshold density forthe direct URCA process to occur in a neutron star as compared to the predictions adopting only pure two-body force.
Energy Technology Data Exchange (ETDEWEB)
Wamba, Etienne, E-mail: wambaetienne@yahoo.fr [Laboratory of Mechanics, Department of Physics, Faculty of Science, University of Yaounde I, P.O. Box 812, Yaounde (Cameroon); Mohamadou, Alidou, E-mail: mohdoufr@yahoo.fr [Condensed Matter Laboratory, Department of Physics, Faculty of Science, University of Douala, P.O. Box 24157, Douala (Cameroon); The Abdus Salam International Center for Theoretical Physics, P.O. Box 586, Strada Costiera, 11, I-34014 Trieste (Italy); Ekogo, Thierry B. [Departement de Physique, Université des Sciences et Techniques de Masuku, B.P. 943, Franceville (Gabon); Atangana, Jacque [High Teachers Training College of Yaounde, P.O. Box 47, Yaounde (Cameroon); Kofane, Timoleon C. [Laboratory of Mechanics, Department of Physics, Faculty of Science, University of Yaounde I, P.O. Box 812, Yaounde (Cameroon); The Abdus Salam International Center for Theoretical Physics, P.O. Box 586, Strada Costiera, 11, I-34014 Trieste (Italy)
2011-11-21
The parametric modulational instability for a discrete nonlinear Schrödinger equation with a cubic–quintic nonlinearity is analyzed. This model describes the dynamics of BECs, with both two- and three-body interatomic interactions trapped in an optical lattice. We identify and discuss the salient features of the three-body interaction in the parametric modulational instability. It is shown that the three-body interaction term can both, shift as well as narrow the window of parametric instability, and also change the behavior of a modulationally stable and parametrically unstable BEC with attractive two-body interaction. We explore this instability through the multiple-scale analysis and identify it numerically. The effect of the three body losses have also been investigated. -- Highlights: ► The parametric MI for the 1D GPE with a cubic–quintic nonlinearity is analyzed. ► The two- and three-body recombination and time-dependent scattering length is considered. ► We generate bright matter waves soliton through MI.
International Nuclear Information System (INIS)
The parametric modulational instability for a discrete nonlinear Schrödinger equation with a cubic–quintic nonlinearity is analyzed. This model describes the dynamics of BECs, with both two- and three-body interatomic interactions trapped in an optical lattice. We identify and discuss the salient features of the three-body interaction in the parametric modulational instability. It is shown that the three-body interaction term can both, shift as well as narrow the window of parametric instability, and also change the behavior of a modulationally stable and parametrically unstable BEC with attractive two-body interaction. We explore this instability through the multiple-scale analysis and identify it numerically. The effect of the three body losses have also been investigated. -- Highlights: ► The parametric MI for the 1D GPE with a cubic–quintic nonlinearity is analyzed. ► The two- and three-body recombination and time-dependent scattering length is considered. ► We generate bright matter waves soliton through MI.
Energy Technology Data Exchange (ETDEWEB)
Orekhovskii, V.P.; Tarasov, S.P.; Ivashchenko, V.A.; Ivanov, S.I.; Starichenko, N.V. (KB Koksokhimmash Giprokoksa (USSR))
1989-07-01
Discusses design and operation of start-up systems for drives of systems for coal charging to coke ovens. Two systems are comparatively evaluated: asynchronous motors with start-up resistors or with inductive rheostats. Use of inductive rheostats simplifies design of drive systems, increases operational reliability (as the number of elements characterized by lowest service life and highest failure rate declines). Replacing start-up resistors with rheostats leads to a decrease in speed of coal charging. Starting acceleration decreases, acceleration distance increases, braking distance increases and braking time also increases. Advantages associated with increased reliability of the charging system compensate reduced loading speed.
Mozhayskiy, Vadim A; Savee, John D; Mann, Jennifer E; Continetti, Robert E; Krylov, Anna I
2008-12-01
The highly debated three-body dissociation of sym-triazine to three HCN products has been investigated by translational spectroscopy and high-level ab initio calculations. Dissociation was induced by charge exchange between the sym-triazine radical cation and cesium. Calculated state energies and electronic couplings suggest that sym-triazine is produced in the 3s Rydberg and pi* <-- n manifolds. Analysis of the topology of these manifolds along with momentum correlation in the dissociation products suggest that the 3s Rydberg manifold characterized by a conical intersection of two potential energy surfaces leads to stepwise dissociation, while the pi* <-- n manifold consisting of a four-fold glancing intersection leads to a symmetric concerted reaction. PMID:18959397
Develop improved battery charger (Turbo-Z Battery Charging System). Final report
Energy Technology Data Exchange (ETDEWEB)
NONE
1999-09-01
The output of this project was a flexible control board. The control board can be used to control a variety of rapid battery chargers. The control module will reduce development cost of rapid battery charging hardware. In addition, PEPCO's proprietary battery charging software have been pre-programmed into the control microprocessor. This product is being applied to the proprietary capacitive charging system now under development.
Distribution of Electrical Charge in a System of Finite Conductors
Czech Academy of Sciences Publication Activity Database
Doležel, Ivo; Kloucek, P.; Šolín, Pavel; Ulrych, B.
2003-01-01
Roč. 48, č. 1 (2003), s. 1-13. ISSN 0001-7043 Grant ostatní: GA €R(CZ) GP102/01/D114; NSF(US) DMS -0107539 Institutional research plan: CEZ:MSM 212300016 Keywords : electrical charge * numerical modelling * integral equations Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
INTRAMOLECULAR CHARGE AND ENERGY TRANSFER IN MULTICHROMOPHORIC AROMATIC SYSTEMS
Energy Technology Data Exchange (ETDEWEB)
Edward C. Lim
2008-09-09
A concerted experimental and computational study of energy transfer in nucleic acid bases and charge transfer in dialkylaminobenzonitriles, and related electron donor-acceptor molecules, indicate that the ultrafast photoprocesses occur through three-state conical interactions involving an intermediate state of biradical character.
CORRELATING ELECTRONIC AND VIBRATIONAL MOTIONS IN CHARGE TRANSFER SYSTEMS
Energy Technology Data Exchange (ETDEWEB)
Khalil, Munira
2014-06-27
The goal of this research program was to measure coupled electronic and nuclear motions during photoinduced charge transfer processes in transition metal complexes by developing and using novel femtosecond spectroscopies. The scientific highlights and the resulting scientific publications from the DOE supported work are outlined in the technical report.
Fix, A
2000-01-01
A three-body calculation of the reaction $\\gamma d\\to\\eta np$ in the energy region from threshold up to 30 MeV above has been performed. The primary goal of this study is to assess the importance of the three-body aspects in the hadronic sector of this reaction. Results are presented for the $\\eta$-meson spectrum as well as for the total cross section. The three-body results differ significantly from those predicted by a simple rescattering model in which only first-order $\\eta N$- and $NN$-interactions in the final state are considered. The major features of the experimental data are well reproduced although right at threshold the rather large total cross section could not be explained.
Studies of continuum states in 16 Ne using three-body correlation techniques
Marganiec, J.; Wamers, F.; Aksouh, F.; Aksyutina, Yu.; Álvarez-Pol, H.; Aumann, T.; Beceiro-Novo, S.; Boretzky, K.; Borge, M. J. G.; Chartier, M.; Chatillon, A.; Chulkov, L. V.; Cortina-Gil, D.; Emling, H.; Ershova, O.; Fraile, L. M.; Fynbo, H. O. U.; Galaviz, D.; Geissel, H.; Heil, M.; Hoffmann, D. H. H.; Hoffmann, J.; Johansson, H. T.; Jonson, B.; Karagiannis, C.; Kiselev, O. A.; Kratz, J. V.; Kulessa, R.; Kurz, N.; Langer, C.; Lantz, M.; Le Bleis, T.; Lemmon, R.; Litvinov, Yu. A.; Mahata, K.; Müntz, C.; Nilsson, T.; Nociforo, C.; Nyman, G.; Ott, W.; Panin, V.; Paschalis, S.; Perea, A.; Plag, R.; Reifarth, R.; Richter, A.; Rodriguez-Tajes, C.; Rossi, D.; Riisager, K.; Savran, D.; Schrieder, G.; Simon, H.; Stroth, J.; Sümmerer, K.; Tengblad, O.; Weick, H.; Wiescher, M.; Wimmer, C.; Zhukov, M. V.
2015-01-01
Two-proton decay of the unbound nucleus 16Ne , produced in one-neutron knockout from a 500 MeV/u 17Ne beam, has been studied at GSI. The ground state, at a resonance energy 1.388(15) MeV, ( MeV) above the 14O +p+p threshold, and two narrow resonances at MeV and 7.57(6) MeV have been investigated. A comparison of the energy difference between the first excited 2+ state and the 0+ ground state in 16Ne with its mirror nucleus 16C reveals a small Thomas-Ehrman shift (TES) of keV. A trend of the TES for the T = 2 quintet is obtained by completing the known data with a prediction for 16F obtained from an IMME analysis. The decay mechanisms of the observed three resonances were revealed from an analysis of the energy and angular correlations of the 14O +p+p decay products. The ground state decay can be considered as a genuine three-body (democratic) mode and the excited states decay sequentially via states in the intermediate nucleus 15F , the 3.22 MeV state predominantly via the 15F ground-state resonance, while the 7.57 MeV state decays via the 5/2+ resonance in 15F at 2.8 MeV above the 14O +p+p threshold. Further, from an analysis of angular correlations, the spin-parity of the 7.57 MeV state has been determined as and assigned as the third 2+ state in 16Ne based on a comparison with 16C.
Dynamics and Matter-Wave Solitons in Bose-Einstein Condensates with Two- and Three-Body Interactions
Directory of Open Access Journals (Sweden)
Jing Chen
2014-01-01
Full Text Available By means of similarity transformation, this paper proposes the matter-wave soliton solutions and dynamics of the variable coefficient cubic-quintic nonlinear Schrödinger equation arising from Bose-Einstein condensates with time-dependent two- and three-body interactions. It is found that, under the effect of time-dependent two- and three-body interaction and harmonic potential with time-dependent frequency, the density of atom condensates will gradually diminish and finally collapse.
Energy Technology Data Exchange (ETDEWEB)
Pruitt, Spencer R.; Nakata, Hiroya; Nagata, Takeshi; Mayes, Maricris; Alexeev, Yuri; Fletcher, Graham D.; Fedorov, Dmitri G; Kitaura, Kazuo; Gordon, M
2016-04-12
The analytic first derivative with respect to nuclear coordinates is formulated and implemented in the framework of the three-body fragment molecular orbital (FMO) method. The gradient has been derived and implemented for restricted Hartree-Fock, second-order Møller-Plesset perturbation, and density functional theories. The importance of the three-body fully analytic gradient is illustrated through the failure of the two-body FMO method during molecular dynamics simulations of a small water cluster. The parallel implementation of the fragment molecular orbital method, its parallel efficiency, and its scalability on the Blue Gene/Q architecture up to 262,144 CPU cores, are also discussed.
40 CFR 35.2122 - Approval of user charge system and proposed sewer use ordinance.
2010-07-01
... Treatment Works § 35.2122 Approval of user charge system and proposed sewer use ordinance. If the project is... proposed sewer use ordinance. 35.2122 Section 35.2122 Protection of Environment ENVIRONMENTAL PROTECTION... existing) sewer use ordinance § 35.2130). If the applicant has a sewer use ordinance or user charge...
Method and system for treating an interior surface of a workpiece using a charged particle beam
Swenson, David Richard
2007-05-23
A method and system of treating an interior surface on an internal cavity of a workpiece using a charged particle beam. A beam deflector surface of a beam deflector is placed within the internal cavity of the workpiece and is used to redirect the charged particle beam toward the interior surface to treat the interior surface.
DEFF Research Database (Denmark)
Sun, Bo; Dragicevic, Tomislav; Freijedo Fernandez, Francisco Daniel;
2016-01-01
This paper proposes a control strategy for plugin electric vehicle (PEV) fast charging station (FCS) equipped with a flywheel energy storage system (FESS). The main role of the FESS is not to compromise the predefined charging profile of PEV battery during the provision of a hysteresis-type active...
Battery Management Systems: Accurate State-of-Charge Indication for Battery-Powered Applications
Pop, V.; Bergveld, H.J.; Danilov, D.; Regtien, P.P.L.; Notten, P.H.L.
2008-01-01
Battery Management Systems – Universal State-of-Charge indication for portable applications describes the field of State-of-Charge (SoC) indication for rechargeable batteries. With the emergence of battery-powered devices with an increasing number of power-hungry features, accurately estimating the
Liu, Dongxia; Qie, Xiushu; Peng, Liang; Li, Wanli
2014-09-01
Electrification and simple discharge schemes are coupled into a 3D Regional Atmospheric Model System (RAMS) as microphysical parameterizations, in accordance with electrical experiment results. The dynamics, microphysics, and electrification components are fully integrated into the RAMS model, and the inductive and non-inductive electrification mechanisms are considered in the charging process. The results indicate that the thunderstorm mainly had a normal tripole charge structure. The simulated charge structure and lightning frequency are basically consistent with observations of the lightning radiation source distribution. The non-inductive charging mechanism contributed to the electrification during the whole lifetime of the thunderstorm, while the inductive electrification mechanism played a significant role in the development period and the mature stage when the electric field reached a large value. The charge structure in the convective region and the rearward region are analyzed, showing that the charge density in the convective region was double that in the rearward region.
System Component Modelling of Electric Vehicles and Charging Infrastructure
Tsakmakis, Emanuel
2012-01-01
The objective of this research is to develop a model for the electrical components that are involved in charging and discharging of an electric vehicle (EV). This will enable testing differ-ent energy management strategies that improve energy efficiency, battery lifetime, and ener-gy availability. Furthermore, the model will enable the investigation of vehicle to grid (V2G), thermal preconditioning of vehicles, and an economic analysis and optimization. In order to achieve the above goals,...
Counter-ions at Charged Walls: Two Dimensional Systems
Samaj, L.; Trizac, E.
2010-01-01
We study equilibrium statistical mechanics of classical point counter-ions, formulated on 2D Euclidean space with logarithmic Coulomb interactions (infinite number of particles) or on the cylinder surface (finite particle numbers), in the vicinity of a single uniformly charged line (one single double-layer), or between two such lines (interacting double-layers). The weak-coupling Poisson-Boltzmann theory, which applies when the coupling constant Gamma is small, is briefly recapitulated (the c...
Non-linear conductivity of charge-density-wave systems
Werner, C. R.; Eckern, U.
1997-01-01
We consider the problem of sliding motion of a charge-density-wave subject to static disorder within an elastic medium model. Starting with a field-theoretical formulation, which allows exact disorder averaging, we propose a self-consistent approximation scheme to obtain results beyond the standard large-velocity expansion. Explicit calculations are carried out in three spatial dimensions. For the conductivity, we find a strong-coupling regime at electrical fields just above the pinning thres...
Scaling in Complex Systems: Analytical Theory of Charged Pores
Enriquez, A.; Blum, L.
2005-01-01
In this paper we find an analytical solution of the equilibrium ion distribution for a toroidal model of a ionic channel, using the Perfect Screening Theorem (PST). The ions are charged hard spheres, and are treated using a variational Mean Spherical Approximation (VMSA) . Understanding ion channels is still a very open problem, because of the many exquisite tuning details of real life channels. It is clear that the electric field plays a major role in the channel behaviour, and for that reas...
Scalar clouds in charged stringy black hole-mirror system
International Nuclear Information System (INIS)
It was reported that massive scalar fields can form bound states around Kerr black holes (Herdeiro and Radu, Phys. Rev. Lett. 112:221101, 2014). These bound states are called scalar clouds; they have a real frequency ω = mΩH, where m is the azimuthal index and ΩH is the horizon angular velocity of Kerr black hole. In this paper, we study scalar clouds in a spherically symmetric background, i.e. charged stringy black holes, with the mirror-like boundary condition. These bound states satisfy the superradiant critical frequency condition ω = qΦH for a charged scalar field, where q is the charge of the scalar field, and ΦH is the horizon's electrostatic potential. We show that, for the specific set of black hole and scalar field parameters, the clouds are only possible for specific mirror locations rm. It is shown that analytical results of the mirror location rm for the clouds perfectly coincide with numerical results in the qQ << 1 regime. We also show that the scalar clouds are also possible when the mirror locations are close to the horizon. Finally, we provide an analytical calculation of the specific mirror locations rm for the scalar clouds in the qQ >> 1 regime. (orig.)
System and Battery Charge Control for PV-Powered AC Lighting Systems
Energy Technology Data Exchange (ETDEWEB)
Kern, G.
1999-04-01
This report reviews a number of issues specific to stand-alone AC lighting systems. A review of AC lighting technology is presented, which discusses the advantages and disadvantages of various lamps. The best lamps for small lighting systems are compact fluorescent. The best lamps for intermediate-size systems are high- or low-pressure sodium. Specifications for battery charging and load control are provided with the goal of achieving lamp lifetimes on the order of 16,000 to 24,000 hours and battery lifetimes of 4 to 5 years. A rough estimate of the potential domestic and global markets for stand-alone AC lighting systems is presented. DC current injection tests were performed on high-pressure sodium lamps and the test results are presented. Finally, a prototype system was designed and a prototype system controller (with battery charger and DC/AC inverter) was developed and built.
Studies of continuum states in {sup 16}Ne using three-body correlation techniques
Energy Technology Data Exchange (ETDEWEB)
Marganiec, J. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Research Division GSI, ExtreMe Matter Institute EMMI, Darmstadt (Germany); Wamers, F. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Research Division GSI, ExtreMe Matter Institute EMMI, Darmstadt (Germany); Frankfurt Institute for Advanced Studies FIAS, Frankfurt am Main (Germany); Aksouh, F.; Aksyutina, Yu.; Boretzky, K.; Chatillon, A.; Emling, H.; Geissel, H.; Heil, M.; Hoffmann, J.; Karagiannis, C.; Kiselev, O.A.; Kurz, N.; Litvinov, Yu.A.; Muentz, C.; Nociforo, C.; Ott, W.; Rossi, D.; Simon, H.; Suemmerer, K.; Weick, H. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Alvarez-Pol, H.; Beceiro-Novo, S.; Cortina-Gil, D.; Rodriguez-Tajes, C. [Universidade de Santiago de Compostela, Grupo de Fisica Nuclear, Santiago de Compostela (Spain); Aumann, T.; Panin, V. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Borge, M.J.G. [CERN, ISOLDE-EP, Geneva (Switzerland); CSIC, Instituto de Estructura de la Materia, Madrid (Spain); Chartier, M. [University of Liverpool, Department of Physics, Liverpool (United Kingdom); Chulkov, L.V. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Kurchatov Institute, Moscow (Russian Federation); Ershova, O.; Langer, C.; Plag, R.; Reifarth, R.; Wimmer, C. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Goethe Universitaet, Institut fuer Angewandte Physik, Frankfurt am Main (Germany); Fraile, L.M. [Universidad Complutense de Madrid, CEI Moncloa, Grupo de Fisica Nuclear, FAMN, Madrid (Spain); Fynbo, H.O.U.; Riisager, K. [University of Aarhus, Department of Physics and Astronomy, Aarhus (Denmark); Galaviz, D.; Perea, A.; Tengblad, O. [CSIC, Instituto de Estructura de la Materia, Madrid (Spain); Hoffmann, D.H.H.; Richter, A.; Schrieder, G. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany); Johansson, H.T.; Jonson, B.; Nilsson, T.; Nyman, G.; Zhukov, M.V. [Chalmers Tekniska Hoegskola, Fundamental Fysik, Goeteborg (Sweden); Kratz, J.V. [Johannes Gutenberg-Universitaet Mainz, Institut fuer Kernchemie, Mainz (Germany); Kulessa, R. [Uniwersytet Jagellonski, Instytut Fizyki, Krakov (Poland); Lantz, M. [Uppsala Universitet, Institutionen foer fysik och astronomi, Uppsala (Sweden); Le Bleis, T. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Technische Universitaet Muenchen, Physik-Department E12, Garching (Germany); Lemmon, R. [STFC Daresbury Lab, Warrington, Nuclear Physics Group, Cheshire (United Kingdom); Mahata, K. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Bhabha Atomic Research Centre, Nuclear Physics Division, Trombay (India); Paschalis, S. [Technische Universitaet Darmstadt, Institut fuer Kernphysik, Darmstadt (Germany); University of Liverpool, Department of Physics, Liverpool (United Kingdom); Savran, D. [Research Division GSI, ExtreMe Matter Institute EMMI, Darmstadt (Germany); Frankfurt Institute for Advanced Studies FIAS, Frankfurt am Main (Germany); Stroth, J. [Goethe Universitaet, Institut fuer Angewandte Physik, Frankfurt am Main (Germany); Wiescher, M. [University of Notre Dame, JINA, Notre Dame, IN (United States)
2015-01-01
Two-proton decay of the unbound T{sub z} =-2 nucleus {sup 16}Ne, produced in one-neutron knockout from a 500 MeV/u {sup 17}Ne beam, has been studied at GSI. The ground state, at a resonance energy 1.388(15) MeV, (Γ = 0.082(15) MeV) above the {sup 14}O+p+p threshold, and two narrow resonances at E{sub r} = 3.220(46) MeV and 7.57(6) MeV have been investigated. A comparison of the energy difference between the first excited 2{sup +} state and the 0{sup +} ground state in {sup 16}Ne with its mirror nucleus {sup 16}C reveals a small Thomas-Ehrman shift (TES) of +70(46) keV. A trend of the TES for the T = 2 quintet is obtained by completing the known data with a prediction for {sup 16}F obtained from an IMME analysis. The decay mechanisms of the observed three resonances were revealed from an analysis of the energy and angular correlations of the {sup 14}O+p+p decay products. The ground state decay can be considered as a genuine three-body (democratic) mode and the excited states decay sequentially via states in the intermediate nucleus {sup 15}F, the 3.22 MeV state predominantly via the {sup 15}F ground-state resonance, while the 7.57 MeV state decays via the 5/2{sup +} resonance in {sup 15}F at 2.8 MeV above the {sup 14}O+p+p threshold. Further, from an analysis of angular correlations, the spin-parity of the 7.57 MeV state has been determined as I{sup π} = 2{sup +} and assigned as the third 2{sup +} state in {sup 16}Ne based on a comparison with {sup 16}C. (orig.)
Paul, Saurabh; Johnson, P. R.; Tiesinga, Eite
2016-04-01
We show that, for ultracold neutral bosonic atoms held in a three-dimensional periodic potential or optical lattice, a Hubbard model with dominant, attractive three-body interactions can be generated. In fact, we derive that the effect of pairwise interactions can be made small or zero starting from the realization that collisions occur at the zero-point energy of an optical lattice site and the strength of the interactions is energy dependent from effective-range contributions. We determine the strength of the two- and three-body interactions for scattering from van der Waals potentials and near Fano-Feshbach resonances. For van der Waals potentials, which for example describe scattering of alkaline-earth atoms, we find that the pairwise interaction can only be turned off for species with a small negative scattering length, leaving the 88Sr isotope a possible candidate. Interestingly, for collisional magnetic Feshbach resonances this restriction does not apply and there often exist magnetic fields where the two-body interaction is small. We illustrate this result for several known narrow resonances between alkali-metal atoms as well as chromium atoms. Finally, we compare the size of the three-body interaction with hopping rates and describe limits due to three-body recombination.
International Nuclear Information System (INIS)
We present spectral calculations of nuclear matter properties including three-body forces. Within the in-medium T-matrix approach, implemented with the CD-Bonn and Nijmegen potentials plus the three-nucleon Urbana interaction, we compute the energy per particle in symmetric and neutron matter. The three-body forces are included via an effective density dependent two-body force in the in-medium T-matrix equations. After fine tuning the parameters of the three-body force to reproduce the phenomenological saturation point in symmetric nuclear matter, we calculate the incompressibility and the energy per particle in neutron matter. We find a soft equation of state in symmetric nuclear matter but a relatively large value of the symmetry energy. We study the the influence of the three-body forces on the single-particle properties. For symmetric matter the spectral function is broadened at all momenta and all densities, while an opposite effect is found for the case of neutrons only. Noticeable modification of the spectral functions are realized only for densities above the saturation density. The modifications of the self-energy and the effective mass are not very large and appear to be strongly suppressed above the Fermi momentum
Three-Body ΛNN → nNN Non mesonic Weak Decay Process of Λ Hypernuclei
International Nuclear Information System (INIS)
The fundamental motivation to study the non-mesonic weak decay (NMWD) of Λ hypernuclei is that it provides the unique channel for the information of the baryon-baryon weak interaction in SU3 group. The relative strength of the two main channels of NMWD whose decay processes are the Λp → np and Λn → nn has been the long standing puzzle during last several decades. The puzzling status has been settled down recently with the Γn/Γp value converging to ∼0.5. The large experimental values of Γn/Γp of the previous measurements turned out to be due to the surprisingly large contribution of the competing three-body NMWD, ΛNN → nNN process. This paper discusses about the first measurement of the branching ratio of the three-body NMWD process and the renormalized intra-nuclear cascade method adopted to disentangle the contribution of the three-body process out of those due to final state interaction. And the prospects of the more accurate measurement of the three-body process also are presented. (author)
Tursunov, E M; Turakulov, S A; Bray, I
2016-01-01
The astrophysical capture process $\\alpha+d$ $\\rightarrow$ $^6$Li + $\\gamma$ is studied in a three-body model. The initial state is factorized into the deuteron bound state and the $\\alpha+d$ scattering state. The final nucleus $^6$Li(1+) is described as a three-body bound state $\\alpha+n+p$ in the hyperspherical Lagrange-mesh method. The contribution of the E1 transition operator from the initial isosinglet states to the isotriplet components of the final state is estimated to be negligible. An estimation of the forbidden E1 transition to the isosinglet components of the final state is comparable with the corresponding results of the two-body model. However, the contribution of the E2 transition operator is found to be much smaller than the corresponding estimations of the two-body model. The three-body model perfectly matches the new experimental data of the LUNA collaboration with the help of the spectroscopic factor 2.586, very consistent with the three-body structure of the final state.
The effect of three-body cluster energy on LOCV calculation for hot nuclear and neutron matter
International Nuclear Information System (INIS)
The two-body correlation functions, obtained in a lowest-order constrained variational calculation for hot nuclear and neutron matter, with the Reid potential and the explicit inclusion of Δ(1234), are state averaged and used to calculate the three-body cluster energy. The three-body cluster energy is found to vary between about 1 and 2 MeV through and beyond twice the nuclear-matter saturation density for temperatures between 5 and 20 MeV. However, the inclusion of a three-body cluster reduces the nuclear-matter flashing and critical temperatures. A critical temperature of 15.8 MeV and a critical exponent of 0.35 is found. The results of entropy calculations are in good agreement with experimental prediction and other theoretical results. Finally it is shown that by allowing an explicit Δ(1234) degree of freedom through the Reid potential up to and including the three-body clusters, the lowest-constrained variational calculation yields other nuclear- and neutron-matter properties close to the available semi-empirical and experimental data at zero and finite temperatures. (author)
On-line Decentralized Charging of Plug-In Electric Vehicles in Power Systems
Li, Qiao; Negi, Rohit; Franchetti, Franz; Ilic, Marija D
2011-01-01
Plug-in electric vehicles (PEV) are gaining increasing popularity in recent years, due to the growing societal awareness of reducing greenhouse gas (GHG) emissions and the dependence on foreign oil or petroleum. Large-scale implementation of PEVs in the power system currently faces many challenges. One particular concern is that the PEV charging can potentially cause significant impact on the existing power distribution system, due to the increase in peak load. As such, this work tries to mitigate the PEV charging impact by proposing a decentralized smart PEV charging algorithm to minimize the distribution system load variance, so that a 'flat' total load profile can be obtained. The charging algorithm is on-line, in that it controls the PEV charging processes in each time slot based entirely on the current power system state. Thus, compared to other forecast based smart charging approaches in the literature, the charging algorithm is robust against various uncertainties in the power system, such as random PE...
Donhefner, Daniel
The mobile market evolves from commodity voice and simple messaging services to value-added data and multimedia services. This not only implies to move from pure telecom to IT/IP- environment, but to exploit their markets with innovative and differentiated offerings to keep the churn rate low and attract new customers. Communication Service Providers (CSP) must focus increasingly on meeting individual needs and higher expectations of their subscribers. They expect service packages that can be tailored to meet the specific demands of their personal situation, preferences and lifestyle. This requires a flexible customer-centric approach instead of the legacy historical grown and diversed system architecture and organizations of CSPs.
Working Group 2 summary: Space charge effects in bending systems
International Nuclear Information System (INIS)
At the start of the Workshop, the authors asked the Working Group 2 participants to concentrate on three basic goals: (1) survey the status of how comprehensively the physics concerning space-charge effects in bends is understood and how complete is the available ensemble of analytic and computational tools; (2) guided by data from experiments and operational experience, identify sources of, and cures for, beam degradation; and (3) review space-charge physics in rings and the limitations it introduces. As the Workshop unfolded, the third goal naturally folded into the other two goals, and these goals, they believe, were fulfilled in that the Working Group was able to compile an end product consisting of a set of recommendations for potentially fruitful future work. This summary constitutes an overview of the deliberations of the Working Group, and it is their hope that the summary clarifies the motivation for the recommended work listed at the end. The summary is organized according to the two aforementioned goals, and the prime topics of discussion appear as subsections under these goals
Scaling in Complex Systems: Analytical Theory of Charged Pores
Enriquez, A
2005-01-01
In this paper we find an analytical solution of the equilibrium ion distribution for a toroidal model of a ionic channel, using the Perfect Screening Theorem (PST). The ions are charged hard spheres, and are treated using a variational Mean Spherical Approximation (VMSA) . Understanding ion channels is still a very open problem, because of the many exquisite tuning details of real life channels. It is clear that the electric field plays a major role in the channel behaviour, and for that reason there has been a lot of work on simple models that are able to provide workable theories. Recently a number of interesting papers have appeared that discuss models in which the effect of the geometry, excluded volume and non-linear behaviour is considered. We present here a 3D model of ionic channels which consists of a charged, deformable torus with a circular or elliptical cross section, which can be flat or vertical (close to a cylinder). Extensive comparisons to MC simulations were performed. The new solution opens...
Image Reconstruction Algorithm for Electrical Charge Tomography System
Directory of Open Access Journals (Sweden)
M. F. Rahmat
2010-01-01
Full Text Available Problem statement: Many problems in scientific computing can be formulated as inverse problem. A vast majority of these problems are ill-posed problems. In Electrical Charge Tomography (EChT, normally the sensitivity matrix generated from forward modeling is very ill-condition. This condition posts difficulties to the inverse problem solution especially in the accuracy and stability of the image being reconstructed. The objective of this study is to reconstruct the image cross-section of the material in pipeline gravity dropped mode conveyor as well to solve the ill-condition of matrix sensitivity. Approach: Least Square with Regularization (LSR method had been introduced to reconstruct the image and the electrodynamics sensor was used to capture the data that installed around the pipe. Results: The images were validated using digital imaging technique and Singular Value Decomposition (SVD method. The results showed that image reconstructed by this method produces a good promise in terms of accuracy and stability. Conclusion: This implied that LSR method provides good and promising result in terms of accuracy and stability of the image being reconstructed. As a result, an efficient method for electrical charge tomography image reconstruction has been introduced.
Numerical design of electron guns and space charge limited transport systems
International Nuclear Information System (INIS)
This paper describes the capabilities and limitations of computer programs used to design electron guns and similarly space-charge limited transport systems. Examples of computer generated plots from several different types of gun problems are included
Hydraulic simulation of the systems of a nuclear power plant for charges calculation in piping
International Nuclear Information System (INIS)
This work presents a general description of the methodology used by the ENACE S.A. Fluids Working Group for hydraulics simulation of a nuclear power plant system for the calculation charges in piping. (Author)
System dynamic model and charging control of lead-acid battery for stand-alone solar PV system
Huang, B.J.
2010-05-01
The lead-acid battery which is widely used in stand-alone solar system is easily damaged by a poor charging control which causes overcharging. The battery charging control is thus usually designed to stop charging after the overcharge point. This will reduce the storage energy capacity and reduce the service time in electricity supply. The design of charging control system however requires a good understanding of the system dynamic behaviour of the battery first. In the present study, a first-order system dynamics model of lead-acid battery at different operating points near the overcharge voltage was derived experimentally, from which a charging control system based on PI algorithm was developed using PWM charging technique. The feedback control system for battery charging after the overcharge point (14 V) was designed to compromise between the set-point response and the disturbance rejection. The experimental results show that the control system can suppress the battery voltage overshoot within 0.1 V when the solar irradiation is suddenly changed from 337 to 843 W/m2. A long-term outdoor test for a solar LED lighting system shows that the battery voltage never exceeded 14.1 V for the set point 14 V and the control system can prevent the battery from overcharging. The test result also indicates that the control system is able to increase the charged energy by 78%, as compared to the case that the charging stops after the overcharge point (14 V). © 2010 Elsevier Ltd. All rights reserved.
High temperature thermocline TES - effect of system pre-charging on thermal stratification
Zavattoni, Simone A.; Barbato, Maurizio C.; Zanganeh, Giw; Pedretti, Andrea
2016-05-01
The purpose of this study is to evaluate, by means of a computational fluid dynamics approach, the effect of performing an initial charging, or pre-charging, on thermal stratification of an industrial-scale thermocline TES unit, based on a packed bed of river pebbles. The 1 GWhth TES unit under investigation is exploited to fulfill the energy requirement of a reference 80 MWe concentrating solar power plant which uses air as heat transfer fluid. Three different scenarios, characterized by 4 h, 6 h and 8 h of pre-charging, were compared with the reference case of TES system operating without pre-charging. For each of these four scenarios, a total of 30 consecutive charge/discharge cycles, of 12 h each, were simulated and the effect of TES pre-charging on thermal stratification was qualitatively evaluated, by means of a stratification efficiency, based on the second-law of thermodynamics. On the basis of the simulations results obtained, the effect of pre-charging, more pronounced during the first cycles, is not only relevant in reducing the time required by the TES to achieve a stable thermal stratification into the packed bed but also to improve the performance at startup when the system is charged for the first time.
Opportunistic Wireless Charging System Design for an On-Demand Shuttle Service
Energy Technology Data Exchange (ETDEWEB)
Meintz, Andrew; Doubleday, Kate; Markel, Tony
2016-06-29
System right-sizing is critical to the implementation of in-motion wireless power transfer (WPT) for electric vehicles. This study evaluates potential system designs for an on-demand employee shuttle by determining the required battery size based on the rated power at a variable number of charging locations. Vehicle power and state of charge are simulated over the drive cycle, based on position and velocity data at every second from the existing shuttle. Adding just one WPT location can halve the battery size. Many configurations are capable of self-sustaining with WPT, while others benefit from supplemental stationary charging.
DEFF Research Database (Denmark)
SUN, BO; Dragicevic, Tomislav; Savaghebi, Mehdi;
2015-01-01
influence on future smart transportation network. This paper explores an off-board charging station upgraded with flywheel energy storage system that could provide a reactive power support to the grid utility. A supervisory control scheme based on distributed bus signaling is proposed to coordinate the...... operation of each component in the system. As a result, the charging station could supply the reactive power support to the utility grid without compromising the charging algorithm and preserve the battery’s lifetime. Finally, the real-time simulation results based on dSPACE1006 verifies the proposed...... strategy....
Development of a utility system for charged particle nuclear reaction data by using intelligentPad
Energy Technology Data Exchange (ETDEWEB)
Aoyama, Shigeyoshi; Ohbayashi, Yoshihide [Information Processing Center, Kitami Institute of Technology, Kitami, Hokkaido (Japan); Masui, Hiroshi [Meme Media Laboratory, Hokkaido University, Sapporo, Hokkaido (Japan); Kato, Kiyoshi [Hokkaido University, Graduate School of Science, Sapporo, Hokkaido (Japan); Chiba, Masaki [Faculty of Social Information, Sapporo Gakuin Univ., Ebetsu, Hokkaido (Japan)
2000-03-01
We have developed a utility system, WinNRDF2, for a nuclear charged particle reaction data of NRDF (Nuclear Reaction Data File) on the IntelligentPad architecture. By using the system, we can search the experimental data of a charged particle reaction of NRDF. Furthermore, we also see the experimental data by using graphic pads which was made through the CONTIP project. (author)
Analysis tools for precision studies of hadronic three-body decays and transition form factors
Energy Technology Data Exchange (ETDEWEB)
Schneider, Sebastian Philipp
2013-02-14
Due to the running coupling constant of Quantum Chromodynamics one of the pillars of the Standard Model, the strong interactions, is still insufficiently understood at low energies. In order to describe the interactions of hadrons that form in this physical regime, one has to devise methods that are non-perturbative in the strong coupling constant. In particular hadronic three-body decays and transition form factors present a great challenge due to the complex analytic structure ensued by strong final-state interactions. In this thesis we present two approaches to tackle these processes. In the first part we use a modified version of non-relativistic effective field theory to analyze the decay {eta}{yields}3{pi}. This perturbative low-energy expansion is ideally suited to study the effects of {pi}{pi} rescattering and contributes greatly to the understanding of the slope parameter of the {eta}{yields}3{pi}{sup 0} Dalitz plot, a quantity that is strongly influenced by final-state interactions and has presented a long-standing puzzle for theoretical approaches. In the second part we present dispersion relations as a non-perturbative means to study three-particle decays. Using the example of {eta}'{yields}{eta}{pi}{pi} we give a detailed introduction to the framework and its numerical implementation. We confront our findings with recent experimental data from the BES-III and VES collaborations and discuss whether the extraction of {pi}{eta} scattering parameters, one of the prime motives to study this decay channel, is feasible in such an approach. A more clear-cut application is given in our study of the decays {omega}/{phi}{yields}3{pi} due to the relative simplicity of this decay channel: our results are solely dependent on the {pi}{pi} P-wave scattering phase shift. We give predictions for the Dalitz plot distributions and compare our findings to very precise data on {phi}{yields}3{pi} by the KLOE and CMD-2 collaborations. We also predict Dalitz plot
Evolved chiral Hamiltonians at the three-body level and beyond
Energy Technology Data Exchange (ETDEWEB)
Calci, Angelo
2014-07-14
Based on the fundamental symmetries of QCD, chiral effective field theory (EFT) provides two- (NN), three- (3N), four- (4N), and many-nucleon interactions in a consistent and systematic scheme. Recent developments to construct chiral NN+3N interactions at different chiral orders and regularizations enable exciting nuclear structure investigations as well as a quantification of the fundamental uncertainties resulting from the chiral expansion and regularization. We present the complete toolchain to employ the present and future chiral NN, 3N, and 4N interactions in nuclear structure calculations and emphasize technical developments in the three- and four-body space, such as the similarity renormalization group (SRG), the frequency conversion, and the transformation to the JT-coupled scheme. We study the predictions of the chiral NN+3N interactions in ab initio nuclear structure calculations with the importance-truncated no-core shell model and coupled-cluster approach. We demonstrate that the inclusion of chiral 3N forces improves the overall agreement with experiment for excitation energies of p-shell nuclei and it qualitatively reproduces the systematics of nuclear binding energies throughout the nuclear chart up to heavy tin isotopes. In this context it is necessary to introduce truncations in the three-body model space and we carefully analyze their impact and confirm the reliability of the reported results. The SRG evolution induces many-nucleon forces that generally cannot be included in the calculations and constitute a major limitation for the applicability of SRG-evolved chiral forces. We study the origin and effect of the induced many-nucleon forces and propose a modification of the interaction, which suppresses the induced beyond-3N forces. This enables applications of the chiral interactions far beyond the mid-p shell. Furthermore, we test alternative formulations of SRG generators aiming to prevent the induced many-body forces from the outset. The
Analysis tools for precision studies of hadronic three-body decays and transition form factors
International Nuclear Information System (INIS)
Due to the running coupling constant of Quantum Chromodynamics one of the pillars of the Standard Model, the strong interactions, is still insufficiently understood at low energies. In order to describe the interactions of hadrons that form in this physical regime, one has to devise methods that are non-perturbative in the strong coupling constant. In particular hadronic three-body decays and transition form factors present a great challenge due to the complex analytic structure ensued by strong final-state interactions. In this thesis we present two approaches to tackle these processes. In the first part we use a modified version of non-relativistic effective field theory to analyze the decay η→3π. This perturbative low-energy expansion is ideally suited to study the effects of ππ rescattering and contributes greatly to the understanding of the slope parameter of the η→3π0 Dalitz plot, a quantity that is strongly influenced by final-state interactions and has presented a long-standing puzzle for theoretical approaches. In the second part we present dispersion relations as a non-perturbative means to study three-particle decays. Using the example of η'→ηππ we give a detailed introduction to the framework and its numerical implementation. We confront our findings with recent experimental data from the BES-III and VES collaborations and discuss whether the extraction of πη scattering parameters, one of the prime motives to study this decay channel, is feasible in such an approach. A more clear-cut application is given in our study of the decays ω/φ→3π due to the relative simplicity of this decay channel: our results are solely dependent on the ππ P-wave scattering phase shift. We give predictions for the Dalitz plot distributions and compare our findings to very precise data on φ→3π by the KLOE and CMD-2 collaborations. We also predict Dalitz plot parameters that may be determined in future high-precision measurements of ω→3π and
International Nuclear Information System (INIS)
Full text: A method based on the three-body formalism incorporated into the Born series have been developed to calculate the excitation of hydrogen and helium atom by proton impact at medium and high energies. The Faddeev type approaches to the scattering of charged particles are a rearrangement of Born series. However, the on shell transition matrix is not well defined by any method based on the Lippmann-Schwinger integral equation. We have developed a method incorporating the FWL formalism in conjunction with Born approximation to calculate the differential cross section for the excitation of hydrogen and helium atom by protons of energy 50 keV to 500 keV. In the case of hydrogen atom, excitation to the final states 2s, 2p and 3s were included while for the case of atomic helium the calculations were performed for the final states 21S and 23S. The excitation of atomic hydrogen is a three body process. However, the excitation of helium is simplified by an active model where the second electron is assumed frozen. The wave function for the final state of helium is chosen from literature. We have also deduced a simple method using a Slater type wave function as: ψ(r) = 0.854 (1 - 1.15r/2) exp(-1.15r) + 0.488 exp(-1.6875r). The differential cross sections for the excitation of helium and hydrogen atoms are plotted in figures 1(a) and 1(b), respectively. In the case of helium atom, the calculations were performed using two different wave functions for the final state of the helium atom, 21S. One was the CHF wave functions and the other one was the wave function of equation 1. Figure 1(b) shows the calculations for the final state 2s and 2p of hydrogen. The results are compared with the experimental work of Park and his coworkers. (author)
Physical sputtering of metallic systems by charged-particle impact
International Nuclear Information System (INIS)
The present paper provides a brief overview of our current understanding of physical sputtering by charged-particle impact, with the emphasis on sputtering of metals and alloys under bombardment with particles that produce knock-on collisions. Fundamental aspects of ion-solid interactions, and recent developments in the study of sputtering of elemental targets and preferential sputtering in multicomponent materials are reviewed. We concentrate only on a few specific topics of sputter emission, including the various properties of the sputtered flux and depth of origin, and on connections between sputtering and other radiation-induced and -enhanced phenomena that modify the near-surface composition of the target. The synergistic effects of these diverse processes in changing the composition of the integrated sputtered-atom flux is described in simple physical terms, using selected examples of recent important progress. 325 refs., 27 figs
Beam Energy and System Size Dependence of Dynamical Net Charge Fluctuations
Energy Technology Data Exchange (ETDEWEB)
STAR Coll
2008-07-21
We present measurements of net charge fluctuations in Au + Au collisions at {radical}s{sub NN} = 19.6, 62.4, 130, and 200 GeV, Cu + Cu collisions at {radical}s{sub NN} = 62.4, 200 GeV, and p + p collisions at {radical}s = 200 GeV using the dynamical net charge fluctuations measure {nu}{sub {+-},dyn}. We observe that the dynamical fluctuations are non-zero at all energies and exhibit a modest dependence on beam energy. A weak system size dependence is also observed. We examine the collision centrality dependence of the net charge fluctuations and find that dynamical net charge fluctuations violate 1/N{sub ch} scaling, but display approximate 1/N{sub part} scaling. We also study the azimuthal and rapidity dependence of the net charge correlation strength and observe strong dependence on the azimuthal angular range and pseudorapidity widths integrated to measure the correlation.
Beam-energy and system-size dependence of dynamical net charge fluctuations
Abelev, B. I.; Aggarwal, M. M.; Ahammed, Z.; Anderson, B. D.; Arkhipkin, D.; Averichev, G. S.; Bai, Y.; Balewski, J.; Barannikova, O.; Barnby, L. S.; Baudot, J.; Baumgart, S.; Beavis, D. R.; Bellwied, R.; Benedosso, F.; Betts, R. R.; Bhardwaj, S.; Bhasin, A.; Bhati, A. K.; Bichsel, H.; Bielcik, J.; Bielcikova, J.; Biritz, B.; Bland, L. C.; Bombara, M.; Bonner, B. E.; Botje, M.; Bouchet, J.; Braidot, E.; Brandin, A. V.; Bueltmann, S.; Burton, T. P.; Bystersky, M.; Cai, X. Z.; Caines, H.; Sánchez, M. Calderón De La Barca; Callner, J.; Catu, O.; Cebra, D.; Cendejas, R.; Cervantes, M. C.; Chajecki, Z.; Chaloupka, P.; Chattopadhyay, S.; Chen, H. F.; Chen, J. H.; Chen, J. Y.; Cheng, J.; Cherney, M.; Chikanian, A.; Choi, K. E.; Christie, W.; Chung, S. U.; Clarke, R. F.; Codrington, M. J. M.; Coffin, J. P.; Cormier, T. M.; Cosentino, M. R.; Cramer, J. G.; Crawford, H. J.; Das, D.; Dash, S.; Daugherity, M.; de Moira, M. M.; Dedovich, T. G.; Dephillips, M.; Derevschikov, A. A.; de Souza, R. Derradi; Didenko, L.; Dictel, T.; Djawotho, P.; Dogra, S. M.; Dong, X.; Drachenberg, J. L.; Draper, J. E.; Du, F.; Dunlop, J. C.; Mazumdar, M. R. Dutta; Edwards, W. R.; Efimov, L. G.; Elhalhuli, E.; Elnimr, M.; Emelianov, V.; Engelage, J.; Eppley, G.; Erazmus, B.; Estienne, M.; Eun, L.; Fachini, P.; Fatemi, R.; Fedorisin, J.; Feng, A.; Filip, P.; Finch, E.; Fine, V.; Fisyak, Y.; Gagliardi, C. A.; Gaillard, L.; Gangadharan, D. R.; Ganti, M. S.; Garcia-Solis, E.; Ghazikhanian, V.; Ghosh, P.; Gorbunov, Y. N.; Gordon, A.; Grebenyuk, O.; Grosnick, D.; Grube, B.; Guertin, S. M.; Guimaraes, K. S. F. F.; Gupta, A.; Gupta, N.; Guryn, W.; Hallman, T. J.; Hamed, A.; Harris, J. W.; He, W.; Heinz, M.; Heppelmann, S.; Hippolyte, B.; Hirsch, A.; Hjort, E.; Hoffman, A. M.; Hoffmann, G. W.; Hofman, D. J.; Hollis, R. S.; Huang, H. Z.; Humanic, T. J.; Huo, L.; Igo, G.; Iordanova, A.; Jacobs, P.; Jacobs, W. W.; Jakl, P.; Jena, C.; Jin, F.; Jones, C. L.; Jones, P. G.; Joseph, J.; Judd, E. G.; Kabana, S.; Kajimoto, K.; Kang, K.; Kapitan, J.; Kaplan, M.; Keane, D.; Kechechyan, A.; Kettler, D.; Khodyrev, V. Yu.; Kiryluk, J.; Kisiel, A.; Klein, S. R.; Knospe, A. G.; Kocoloski, A.; Koetke, D. D.; Kopytine, M.; Kotchenda, L.; Kouchpil, V.; Kravtsov, P.; Kravtsov, V. I.; Krueger, K.; Kuhn, C.; Kumar, A.; Kumar, L.; Kurnadi, P.; Lamont, M. A. C.; Landgraf, J. M.; Lapointe, S.; Laue, F.; Lauret, J.; Lebedev, A.; Lednicky, R.; Lee, C.-H.; Levine, M. J.; Li, C.; Li, Y.; Lin, G.; Lin, X.; Lindenbaum, S. J.; Lisa, M. A.; Liu, F.; Liu, J.; Liu, L.; Ljubicic, T.; Llope, W. J.; Longacre, R. S.; Lu, Y.; Ludlam, T.; Lynn, D.; Ma, G. L.; Ma, J. G.; Ma, Y. G.; Mahapatra, D. P.; Majka, R.; Mangotra, L. K.; Manweiler, R.; Margetis, S.; Markert, C.; Matis, H. S.; Matulenko, Yu. A.; McShane, T. S.; Meschanin, A.; Millane, J.; Miller, M. L.; Minaev, N. G.; Mioduszewski, S.; Mischke, A.; Mitchell, J.; Mohanty, B.; Morozov, D. A.; Munhoz, M. G.; Nandi, B. K.; Nattrass, C.; Nayak, T. K.; Nelson, J. M.; Nepali, C.; Netrakanti, P. K.; Ng, M. J.; Nogach, L. V.; Nurushev, S. B.; Odyniec, G.; Ogawa, A.; Okada, H.; Okorokov, V.; Olson, D.; Pachr, M.; Pal, S. K.; Panebratsev, Y.; Pawlak, T.; Peitzmann, T.; Perevoztchikov, V.; Perkins, C.; Peryt, W.; Phatak, S. C.; Planinic, M.; Pluta, J.; Poljak, N.; Porile, N.; Poskanzer, A. M.; Potekhin, M.; Potukuchi, B. V. K. S.; Prindle, D.; Pruneau, C.; Pruthi, N. K.; Putschke, J.; Raniwala, R.; Raniwala, S.; Ray, R. L.; Ridiger, A.; Ritter, H. G.; Roberts, J. B.; Rogachevskiy, O. V.; Romero, J. L.; Rose, A.; Roy, C.; Ruan, L.; Russcher, M. J.; Rykov, V.; Sahoo, R.; Sakrejda, I.; Sakuma, T.; Salur, S.; Sandweiss, J.; Sarsour, M.; Schambach, J.; Scharenberg, R. P.; Schmitz, N.; Seger, J.; Selyuzhenkov, I.; Seyboth, P.; Shabetai, A.; Shahaliev, E.; Shao, M.; Sharma, M.; Shi, S. S.; Shi, X.-H.; Sichtermann, E. P.; Simon, F.; Singaraju, R. N.; Skoby, M. J.; Smirnov, N.; Snellings, R.; Sorensen, P.; Sowinski, J.; Spinka, H. M.; Srivastava, B.; Stadnik, A.; Stanislaus, T. D. S.; Staszak, D.; Strikhanov, M.; Stringfellow, B.; Suaide, A. A. P.; Suarez, M. C.; Subba, N. L.; Sumbera, M.; Sun, X. M.; Sun, Y.; Sun, Z.; Surrow, B.; Symons, T. J. M.; de Toledo, A. Szanto; Takahashi, J.; Tang, A. H.; Tang, Z.; Tarnowsky, T.; Thein, D.; Thomas, J. H.; Tian, J.; Timmins, A. R.; Timoshenko, S.; Tokarev, M.; Tram, V. N.; Trattner, A. L.; Trentalange, S.; Tribble, R. E.; Tsai, O. D.; Ulery, J.; Ullrich, T.; Underwood, D. G.; Buren, G. Van; van der Kolk, N.; van Leeuwen, M.; Molen, A. M. Vander; Varma, R.; Vasconcelos, G. M. S.; Vasilevski, I. M.; Vasiliev, A. N.; Videbaek, F.; Vigdor, S. E.; Viyogi, Y. P.; Vokal, S.; Voloshin, S. A.; Wada, M.; Waggoner, W. T.; Wang, F.; Wang, G.; Wang, J. S.; Wang, Q.; Wang, X.; Wang, X. L.; Wang, Y.; Webb, J. C.; Westfall, G. D.; Whitten, C., Jr.; Wieman, H.; Wissink, S. W.; Witt, R.; Wu, J.; Wu, Y.; Xu, N.; Xu, Q. H.; Xu, Y.; Xu, Z.; Yepes, P.; Yoo, I.-K.; Yue, Q.; Zawisza, M.; Zbroszczyk, H.; Zhan, W.; Zhang, H.; Zhang, S.; Zhang, W. M.; Zhang, Y.; Zhang, Z. P.; Zhao, Y.; Zhong, C.; Zhou, J.; Zoulkarneev, R.; Zoulkarneeva, Y.; Zuo, J. X.
2009-02-01
We present measurements of net charge fluctuations in Au+Au collisions at sNN=19.6, 62.4, 130, and 200 GeV, Cu+Cu collisions at sNN=62.4 and 200 GeV, and p+p collisions at s=200 GeV using the dynamical net charge fluctuations measure ν+-,dyn. We observe that the dynamical fluctuations are nonzero at all energies and exhibit a modest dependence on beam energy. A weak system size dependence is also observed. We examine the collision centrality dependence of the net charge fluctuations and find that dynamical net charge fluctuations violate 1/Nch scaling but display approximate 1/Npart scaling. We also study the azimuthal and rapidity dependence of the net charge correlation strength and observe strong dependence on the azimuthal angular range and pseudorapidity widths integrated to measure the correlation.
Aditya Shekhar; Venugopal Prasanth; Pavol Bauer; Mark Bolech
2016-01-01
The economic viability of on-road wireless charging of electric vehicles (EVs) strongly depends on the choice of the inductive power transfer (IPT) system configuration (static or dynamic charging), charging power level and the percentage of road coverage of dynamic charging. In this paper, a case study is carried out to determine the expected investment costs involved in installing the on-road charging infrastructure for an electric bus fleet. Firstly, a generic methodology is described to d...
Characteristics of high efficiency current charging system for HTS magnet with solar energy
Kim, Dae-Wook; Yoon, Yong-Soo; Chung, Yoon-Do; Jo, Hyun-Chul; Kim, Ho-Min; Oh, Sung-Kwun; Kim, Hyun-Ki; Oh, Jae-Gi; Ko, Tae-Kuk
In terms of electrical energy, the technical fusion with solar energy system is promisingly applied in order to improve the efficiency in the power applications, since the solar energy system can convert an eternal electric energy in all-year-around. As one of such power applications, we proposed a current charging system for HTS magnet combined with solar energy (CHS). As this system can operate without external utility power to charge the HTS load magnet due to the solar energy, the operating efficiency is practically improved. The power converter, which is interfaced with solar energy and HTS magnet systems, plays an important role to transfer the stable electric energy and thus, the stabilized performance of the converter with solar energy system is one of essential factors. In this study, we investigated various charging performances under different operating conditions of the converter. In addition, operating characteristics have been analyzed by solving solar cell equivalent equations based on circuit simulation program.
Three-body models of the 6ΛΛHe and 9ΛBe hypernuclei with non-local interactions
International Nuclear Information System (INIS)
A three-body model involving non-local interactions is developed in configuration space. It is based on a hyperspherical-harmonics expansion and the Lagrange-mesh method. The 6ΛΛHe and 9ΛBe hypernuclei are studied as three-body αΛΛ and ααΛ systems. Recently proposed quark-model based ΛN and ΛΛ interactions are used. A non-local Λα interaction is obtained by folding the ΛN interaction with a Gaussian α density. Various phenomenological αα interactions are employed. The results agree within 1 keV with recent Faddeev calculations in momentum space. Energies and radii of 6ΛΛHe and 9ΛBe are compared with a purely local model. The B(E2) between the 9ΛBe bound states is also calculated. The role of non-locality is discussed
Energy Technology Data Exchange (ETDEWEB)
Garcilazo, H., E-mail: humberto@esfm.ipn.mx [Escuela Superior de Fisica y Matematicas, Instituto Politecnico Nacional, Edificio 9, 07738 Mexico D.F. (Mexico); Gal, A., E-mail: avragal@savion.huji.ac.il [Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel)
2013-01-02
The {pi}{Lambda}N-{pi}{Sigma}N coupled-channel system with quantum numbers (Y,I,J{sup P})=(1,3/2 ,2{sup +}) is studied in a relativistic three-body model, using two-body separable interactions in the dominant p-wave pion-baryon and {sup 3}S{sub 1}YN channels. Three-body equations are solved in the complex energy plane to search for quasibound state and resonance poles, producing a robust narrow {pi}{Lambda}N resonance about 10-20 MeV below the {pi}{Sigma}N threshold. Viewed as a dibaryon, it is a {sup 5}S{sub 2} quasibound state consisting of {Sigma}(1385)N and {Delta}(1232)Y components. Comparison is made between the present relativistic model calculation and a previous, outdated nonrelativistic calculation which resulted in a {pi}{Lambda}N bound state. Effects of adding a K{sup Macron }NN channel are studied and found insignificant. Possible production and decay reactions of this (Y,I,J{sup P})=(1,3/2 ,2{sup +}) dibaryon are discussed.
Csanak, G.; Inal, M. K.; Fontes, C. J.; Kilcrease, D. P.
2016-03-01
We use the Gell-Mann-Goldberger-Watson (GGW) method to further develop and elaborate on our earlier investigation of electron-ion three-body scattering. The GGW method is used to obtain multipole moment creation, destruction, and transfer rate formulae by the three-body recombination of electrons with ions assuming short-range interaction potentials. This approach leads to the derivation of the rate coefficient formula obtained previously via the alternative wave-packet propagation method. We show how to include exchange effects into the formalism, allowing extension of its validity to lower incident electron energies, and also introduce the Liouville-space formulation. Furthermore, we indicate that this method makes the relevance of the formulae to relativistic systems more transparent, demonstrating its validity for high incident electron energies and heavy ions. The Liouville-space formulation is used to facilitate the derivation of a selection rule for the rate coefficients for cylindrically symmetric plasmas, which is of practical importance for the proper formulation of population-alignment collisional-radiative modeling.
Equipment for controlling test benches charged particle accelerator pulse power supply systems
International Nuclear Information System (INIS)
Composition of the off-line and manual control device system designed for experimental testing the pulse supply systems of charged particle accelereators is considered. The system includes following devices: a manual remote control desk, a sysnchronization device with fibre-optical commutation programmed pulse shape generator digital sources of reference voltage. Performances of all these devices are presented. 1 ref
Normal and impaired charge transport in biological systems
Energy Technology Data Exchange (ETDEWEB)
Miller, John H., E-mail: jhmiller@uh.edu [Department of Physics & Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5005 (United States); Villagrán, Martha Y. Suárez; Maric, Sladjana [Department of Physics & Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5005 (United States); Briggs, James M. [Department of Biology & Biochemistry, University of Houston, Houston, TX 77204-5001 (United States)
2015-03-01
We examine the physics behind some of the causes (e.g., hole migration and localization that cause incorrect base pairing in DNA) and effects (due to amino acid replacements affecting mitochondrial charge transport) of disease-implicated point mutations, with emphasis on mutations affecting mitochondrial DNA (mtDNA). First we discuss hole transport and localization in DNA, including some of our quantum mechanical modeling results, as they relate to certain mutations in cancer. Next, we give an overview of electron and proton transport in the mitochondrial electron transport chain, and how such transport can become impaired by mutations implicated in neurodegenerative diseases, cancer, and other major illnesses. In particular, we report on our molecular dynamics (MD) studies of a leucine→arginine amino acid replacement in ATP synthase, encoded by the T→G point mutation at locus 8993 of mtDNA. This mutation causes Leigh syndrome, a devastating maternally inherited neuromuscular disorder, and has been found to trigger rapid tumor growth in prostate cancer cell lines. Our MD results suggest, for the first time, that this mutation adversely affects water channels that transport protons to and from the c-ring of the rotary motor ATP synthase, thus impairing the ability of the motor to produce ATP. Finally, we discuss possible future research topics for biological physics, such as mitochondrial complex I, a large proton-pumping machine whose physics remains poorly understood.
Normal and impaired charge transport in biological systems
International Nuclear Information System (INIS)
We examine the physics behind some of the causes (e.g., hole migration and localization that cause incorrect base pairing in DNA) and effects (due to amino acid replacements affecting mitochondrial charge transport) of disease-implicated point mutations, with emphasis on mutations affecting mitochondrial DNA (mtDNA). First we discuss hole transport and localization in DNA, including some of our quantum mechanical modeling results, as they relate to certain mutations in cancer. Next, we give an overview of electron and proton transport in the mitochondrial electron transport chain, and how such transport can become impaired by mutations implicated in neurodegenerative diseases, cancer, and other major illnesses. In particular, we report on our molecular dynamics (MD) studies of a leucine→arginine amino acid replacement in ATP synthase, encoded by the T→G point mutation at locus 8993 of mtDNA. This mutation causes Leigh syndrome, a devastating maternally inherited neuromuscular disorder, and has been found to trigger rapid tumor growth in prostate cancer cell lines. Our MD results suggest, for the first time, that this mutation adversely affects water channels that transport protons to and from the c-ring of the rotary motor ATP synthase, thus impairing the ability of the motor to produce ATP. Finally, we discuss possible future research topics for biological physics, such as mitochondrial complex I, a large proton-pumping machine whose physics remains poorly understood
Pruitt, Spencer R; Nakata, Hiroya; Nagata, Takeshi; Mayes, Maricris; Alexeev, Yuri; Fletcher, Graham; Fedorov, Dmitri G; Kitaura, Kazuo; Gordon, Mark S
2016-04-12
The analytic first derivative with respect to nuclear coordinates is formulated and implemented in the framework of the three-body fragment molecular orbital (FMO) method. The gradient has been derived and implemented for restricted second-order Møller-Plesset perturbation theory, as well as for both restricted and unrestricted Hartree-Fock and density functional theory. The importance of the three-body fully analytic gradient is illustrated through the failure of the two-body FMO method during molecular dynamics simulations of a small water cluster. The parallel implementation of the fragment molecular orbital method, its parallel efficiency, and its scalability on the Blue Gene/Q architecture up to 262 144 CPU cores are also discussed. PMID:26913837
E. A. Perdios; Kalantonis, V. S.; Perdiou, A. E.; Nikaki, A. A.
2015-01-01
The paper deals with a modification of the restricted three-body problem in which the angular velocity variation is considered in the case where the primaries are sources of radiation. In particular, the existence and stability of its equilibrium points in the plane of motion of the primaries are studied. We find that this problem admits the well-known five planar equilibria of the classical problem with the difference that the corresponding collinear points may be stable depending on the par...
Crider, Paul
2010-01-01
Fast beam photofragment translational spectroscopy has been used to elucidate the photodissociation dynamics of small radicals and closed-shell anions. Imaging of photofragments in time- and position-coincidence allows the determination of mass distributions, translational energy distributions [P(ET) distributions], and in the case of three-body fragmentation channels, ternary Dalitz plots depicting the momentum disposal among the fragments. These data yield information about the potential en...
A spacecraft cooling system for a charged coupled device
Walker, Mary S.; Tulkoff, Philip
1986-01-01
This paper describes the thermal analysis, design, and testing of a dedicated cooling system for a Spartan spacecraft payload. A simple reliable design that requires minimum power consumption and minimum weight was developed. The payload has a CCD detector that must be maintained at a temperature of approximately -40 C or colder. The cooling system consists of a fin radiator, dual redundant heat pipes, and a thermal electric device (TED). The system was analytically modeled through the use of the Simplified Shuttle Payload Thermal Analyzer (SSPTA) computer program. A thermal test of the system simulating flight conditions was conducted to correlate the computer model and verify performance specifications.
Theoretical study of the α +d →6Li +γ astrophysical capture process in a three-body model
Tursunov, E. M.; Kadyrov, A. S.; Turakulov, S. A.; Bray, I.
2016-07-01
The astrophysical capture process α +d →6Li is studied in a three-body model. The initial state is factorized into the deuteron bound state and the (α +d )-scattering state. The final nucleus 6Li (1+) is described as a three-body bound state α +n +p in the hyperspherical Lagrange-mesh method. The contribution of the E 1 -transition operator from the initial isosinglet states to the isotriplet components of the final state is estimated to be negligible. An estimation of the forbidden E 1 transition to the isosinglet components of the final state is comparable with the corresponding results of the two-body model. However, the contribution of the E 2 -transition operator is found to be much smaller than the corresponding estimations of the two-body model. The three-body model perfectly matches the new experimental data of the LUNA Collaboration with the spectroscopic factor of 2.586 estimated from the bound-state wave functions of 6Li and a deuteron.
Three-body Effects for the p(pe^-, ν_e)d Reaction in Nuclear Astrophysics.
Kim, Yeong E.; Zubarev, Alexander L.
1996-05-01
We have investigated three-body effect for p(pe^-, ν_e)d reaction in nuclear astrophysics. Solutions of three-body equation for the initial pep state show that two-proton dynamics does not depend on the electron degrees of freedom and hence the conventional adiabatic approximation is valid for energy sector (E_ep/E_pp) > 10-3 where E_ep and E_pp are the relative kinetic energies between e and p, and between p and p, respectively. For the energy sector (E_ep/E_pp) ≈ 10-3, an exact solution of the three-body equation is required. For the energy sector (E_ep/E_pp) GFC) can occur between two protons. Our estimate of the GFC effect indicates that the previous conventional estimate of the pep solar neutrino flux may be an underestimate at least by a factor of two. Implications of our results for the solar neutrino problem are described. At lower temperatures, the GFC effect becomes more significant, and p(pe^-, ν_e)d may dominate over p(p,e^+ ν_e)d. The enhancement of the reaction rate for p(pe^-, νe )d at lower temperatures due to the GFC effect may offer possible explanations for some of long-standing anomalies in astrophysical and geophysical problems.
Charged colloids, polyelectrolytes and biomolecules viewed as strongly coupled Coulomb systems
Löwen, H; Likos, C N; Blaak, R; Dzubiella, J; Jusufi, A; Hoffmann, N; Harreis, H M
2003-01-01
A brief review is given on recent studies of charged soft matter solutions, as modelled by the 'primitive' approach of strongly coupled Coulomb systems, where the solvent just enters as a dielectric background. These include charged colloids, biological macromolecules such as proteins and DNA, polyelectrolytes and polyelectrolyte stars. Also some original results are presented on colloid-polyelectrolyte complex formation near walls and on the anomalous fluid structure of polyelectrolyte stars as a function of increasing concentration.
Charged colloids, polyelectrolytes and biomolecules viewed as strongly coupled Coulomb systems
International Nuclear Information System (INIS)
A brief review is given on recent studies of charged soft matter solutions, as modelled by the 'primitive' approach of strongly coupled Coulomb systems, where the solvent just enters as a dielectric background. These include charged colloids, biological macromolecules such as proteins and DNA, polyelectrolytes and polyelectrolyte stars. Also some original results are presented on colloid-polyelectrolyte complex formation near walls and on the anomalous fluid structure of polyelectrolyte stars as a function of increasing concentration
Wette, Patrick; Klassen, Ina; Holland-Moritz, Dirk; Herlach, Dieter; Schöpe, Hans Joachim; Lorenz, Nina; Reiber, Holger; Palberg, Thomas; Roth, Stephan
2010-01-01
In titration experiments with NaOH, we have determined the full phase diagram of charged colloidal spheres in dependence on the particle density n, the particle effective charge Zeff and the concentration of screening electrolyte c using microscopy, light and ultrasmall angle x-ray scattering (USAXS). For sufficiently large n, the system crystallizes upon increasing Zeff at constant c and melts upon increasing c at only slightly altered Zeff. In contrast to earlier work, equilibrium phase bou...
Battery Management Systems: Accurate State-of-Charge Indication for Battery-Powered Applications
Pop, V.; Bergveld, H.J.; Danilov, D.; Regtien, P.P.L.; Notten, P.H.L.
2008-01-01
Battery Management Systems – Universal State-of-Charge indication for portable applications describes the field of State-of-Charge (SoC) indication for rechargeable batteries. With the emergence of battery-powered devices with an increasing number of power-hungry features, accurately estimating the battery SoC, and even more important the remaining time of use, becomes more and more important. Therefore, many leading semiconductor companies, e.g. NXP Semiconductors, Texas Instruments, Microch...
The Influence of Morphology on the Charge Transport in Two-Phase Disordered Organic Systems
Woellner, Cristiano F.; Machado, Leonardo D.; Autreto, Pedro A.S.; Freire, Jose A.; Galvao, Douglas S.
2015-01-01
In this work we use a three-dimensional Pauli master equation to investigate the charge carrier mobility of a two-phase system, which can mimic donor-acceptor and amorphous- crystalline bulk heterojunctions. Our approach can be separated into two parts: the morphology generation and the charge transport modeling in the generated blend. The morphology part is based on a Monte Carlo simulation of binary mixtures (donor/acceptor). The second part is carried out by numerically solving the steady-...
Charge storage in the O{sub 2(g)},Pt/YSZ system
Energy Technology Data Exchange (ETDEWEB)
Jaccoud, Arnaud; Falgairette, Cyril; Foti, Gyoergy; Comninellis, Christos [Ecole Polytechnique Federale de Lausanne (EPFL), Institute of Chemical Sciences and Engineering, CH-1015 Lausanne (Switzerland)
2007-11-01
The O{sub 2(g)},Pt/YSZ system was characterized at 450 C by using various electrochemical techniques such as single- and double-step chronoamperometry, chronocoulometry and chronopotentiometry. The response to these experiments gives evidence for the presence of pseudocapacitive processes related with charge storage. Linear sweep voltammetric measurements after prolonged anodic polarization have shown that these charges are located at three different locations. (author)
Frustrated phase separation in two-dimensional charged systems
Ortix, C.; Lorenzana, J.; Di Castro, C.
2005-01-01
We study phase separation frustrated by the long-range Coulomb interaction in two dimensional electronic systems with emphasys in the case of a metallic and an insulating phase. We find that two-dimensional systems are more prone to mesoscopic frustrated phase separation than the three dimensional ones.
Gacek, Matthew M; Berg, John C
2012-12-21
The current work examines the role of acid-base properties on particle charging in apolar media. Manipulating the polarity and magnitude of charge in such systems is of growing interest to a number of applications. A major hurdle to the implementation of this technology is that the mechanism(s) of particle charging remain a subject of debate. The authors previously conducted a study of the charging of a series of mineral oxide particles dispersed in apolar systems that contained the surfactant AOT. It was observed that there was a correlation between the particle electrophoretic mobility and the acid-base nature of the particle, as characterized by aqueous point of zero charge (PZC) or the isoelectric point (IEP). The current study investigates whether or not a similar correlation is observed with other surfactants, namely, the acidic Span 80 and the basic OLOA 11000. This is accomplished by measuring the electrophoretic mobility of a series of mineral oxides that are dispersed in Isopar-L containing various concentrations of either Span 80 or OLOA 11000. The mineral oxides used have PZC values that cover a wide range of pH, providing a systematic study of how particle and surfactant acid-base properties impact particle charge. It was found that the magnitude and polarity of particle surface charge varied linearly with the particle PZC for both surfactants used. In addition, the point at which the polarity of charge reversed for the basic surfactant OLOA 11000 was shifted to a pH of approximately 8.5, compared to the previous result of about 5 for AOT. This proves that both surfactant and particle acid-base properties are important, and provides support for the theory of acid-base charging in apolar media. PMID:23157688
Development of Discrete Power Supply with Charge Pump Method for High Powered Sonar System
Directory of Open Access Journals (Sweden)
Kristian Ismail
2012-07-01
Full Text Available Power supply is one of the electronic devices that can provide electric energy for electronic systems or other systems. There are several types of power supplies that can be applied depend on the requirement and functions. One example is the use of power supply for sonar systems. Sonar system is a device which can be used to detect a target under water. The sonar system is an electronic circuit that requires a power supply with specific characteristics when the sonar functions as a transmitter and a receiver in the specific span time (when on and the specific lag time (when off. This paper discusses the design of power supply for high-powered sonar systems with discrete methods in which high power supply is only applied when the acoustic waves radiated under water. Charge pump was used to get the appropriate output voltage from lower input voltage. Charge pump utilized a combination of series and parallel connections of capacitors. The working mode of this power supply used the lag time as the calculation of time to charge charge pump capacitors in parallel while the span time was used for the calculation of discharging the charge pump capacitors in series.
Electron beam charge measurement on PHIL photo-injector using a microcontroller based system
International Nuclear Information System (INIS)
PHIL [1] is an electron beam accelerator at LAL. It produces low energy (E < 5 MeV) and high current (maximum 2nC/bunch, 10 ps duration) electron bunch at a repetition frequency of 5Hz. The beam charge measurements are performed by two Faraday Cups (FC) at both ends of the beam line and also with two Integrating Current Transformer (ICT), installed immediately after the RF gun and at the end of the straight beam line (see figure 1). Extracted signals from the ICT and FC, are processed by electronic circuits, displayed on an oscilloscope, and used to calculate the beam charge manually using the oscilloscope features. This operation is not accurate, does't permit to follow and save the temporal evolution of the charge and cannot be integrated in the control command system. To overcome this problem, a new approach was adopted, based on two systems: - An electronic back-end to integrate the signal from coming the charge measurement systems (20ns large pulse), and outputs a large duration signal (around 400μs) whose amplitude is proportional to the beam charge. - A microcontroller is used to acquire the integrated signal with a repetition rate of 5Hz, make the analog-digital conversion, and calculate the mean beam charge. The output signal can be sent to the control command system for displaying and to automate other process, especially the measurements of the beam charge versus RF/Laser phase. This system offers good accuracy, with a resolution of around 1pC, and can be easily integrated in the control command system
Charmless Three-Body B-decays: final state interaction and CP violation
Alvarenga Nogueira, J. H.; Bediaga, I.; Cavalcante, A. B. R.; Frederico, T.; Lourenço, O.
2016-04-01
We obtain an explicit expression for the charge-parity violation (CPV) considering final state interactions (FSI) and the ρ(770) and f 0(980) resonances in the B± → π± π+π‑ decay. In addition, we investigate the channel coupled by the strong interaction B± → π± K+ K-. dictated by the CPT constraint. We use our model to fit experimental data of such decays [1], For the interfering resonant contributions to the CP asymmetry, we show that locally CPT constraint seems to be valid in the B± → π± π+π‑ channel. Our work suggests, in agreement with the CPT constraint, that the CP asymmetry in coupled channels are related and have opposite signs. Our formula for the CP asymmetry fairly fit the LHCb data improving our understanding of the interplay between the FSI and CP violation. For more complete and detailed studies for the channels K± K+ K-, K± π+π‑, π± K+ K- and π± π+π‑ see Ref. [2],
International Nuclear Information System (INIS)
A key reason for the low sales volumes of electric vehicles is their significantly higher purchasing price in comparison to conventional vehicles. However, various charging strategies can be applied to make these vehicles more profitable. In this paper, controlled charging concepts are transferred to commercial fleets operating in closed transport systems, as we found this field of application particularly well suited for the implementation of charging strategies. We analyzed data gathered in a field experiment conducted in a European port using electric vehicles in combination with a battery-swapping station to calculate the economic potentials of three charging scenarios: (1) optimizing energy procurement (2) trading load-shifting potential on control markets, and (3) a combination of the two. The findings indicate that all approaches are appropriate for reducing economic disadvantages of electric transport vehicles. Furthermore, we find that adjusting charging processes to avoid price peaks is more profitable than offering control reserve. Finally, focusing on the combination of both strategies seems to be most promising from an economic perspective. In this context, operational cost savings of more than 65% can be achieved compared to a similar dieselpowered vehicle when applying this strategy. - Highlights: • We model various charging strategies for electric transport vehicles. • The economic assessment is based on a field experiment with a port operator. • We consider the special market design of spot and ancillary service markets. • All charging strategies presented provide substantial cost-saving potentials. • Optimizing energy procurement is more profitable than offering control reserve
Computational models of an inductive power transfer system for electric vehicle battery charge
Anele, A. O.; Hamam, Y.; Chassagne, L.; Linares, J.; Alayli, Y.; Djouani, K.
2015-09-01
One of the issues to be solved for electric vehicles (EVs) to become a success is the technical solution of its charging system. In this paper, computational models of an inductive power transfer (IPT) system for EV battery charge are presented. Based on the fundamental principles behind IPT systems, 3 kW single phase and 22 kW three phase IPT systems for Renault ZOE are designed in MATLAB/Simulink. The results obtained based on the technical specifications of the lithium-ion battery and charger type of Renault ZOE show that the models are able to provide the total voltage required by the battery. Also, considering the charging time for each IPT model, they are capable of delivering the electricity needed to power the ZOE. In conclusion, this study shows that the designed computational IPT models may be employed as a support structure needed to effectively power any viable EV.
Simulation of the plasma meniscus with and without space charge using triode extraction system
Energy Technology Data Exchange (ETDEWEB)
Rahman, M.M.Abdel; El-Khabeary, H. [Atomic Energy Authority, Cairo (Egypt). Nuclear Research Center. Accelerators and Ion Sources Dept.]. E-mail: moustafa82003@yahoo.com
2009-03-15
In this work, simulation of the singly charged argon ion trajectories for a variable plasma meniscus is studied with and without space charge for the triode extraction system by using SIMION 3D (Simulation of Ion Optics in Three Dimensions) version 7 personal computer program. The influence of acceleration voltage applied to the acceleration electrode of the triode extraction system on the shape of the plasma meniscus has been determined. The plasma electrode is set at +5000 volt and the acceleration voltage applied to the acceleration electrode is varied from -5000 volt to +5000 volt. In the most of the concave and convex plasma shapes, ion beam emittance can be calculated by using separate standard deviations of positions and elevations angles. Ion beam emittance as a function of the curvature of the plasma meniscus for different plasma shapes ( flat, concave and convex ) without space charge at acceleration voltage varied from -5000 volt to +5000 volt applied to the acceleration electrode of the triode extraction system has been investigated. The influence of the extraction gap on ion beam emittance for a plasma concave shape of 3.75 mm without space charge at acceleration voltage, V{sub acc} = -2000 volt applied to the acceleration electrode of the triode extraction system has been determined. Also the influence of space charge on ion beam emittance for variable plasma meniscus at acceleration voltage, V{sub acc} = -2000 volt applied to the acceleration electrode of the triode extraction system has been studied. (author)
Monitoring and control system of charging batteries connected to a photovoltaic panel
Idzkowski, Adam; Leoniuk, Katarzyna; Walendziuk, Wojciech; Budzynski, Lukasz
2015-09-01
In this paper the off-grid photovoltaic system consisting of a PV panel, MMPT charge controller and battery is described. The realization of a laboratory stand for charging or discharging batteries is presented. Original monitoring and control system, which is based on LabVIEW software and LabJack DAQ device, has been built. Data acquisition part, arithmetic part and front panel of program created in LabVIEW are described. Some problems with implementation of this system, providing the monitoring of electrical parameters, are mentioned.
Precision charge amplification and digitization system for a scintillating and lead glass array
International Nuclear Information System (INIS)
A 544-channel low-noise, high-rate, precision charge amplification and ADC system was constructed for the Fermilab Experiment 705 electromagnetic calorimeter, which employs SCG1-C scintillating glass and SF5 lead glass instrumented with photomultiplier tubes. A general discussion of the system is given, and the charge amplification, fast trigger pulse generation, and analog to digital conversion aspects of the system are presented in more detail. Performance is evaluated using data from Experiment 705 and from off-line tests. Short and long term pedestal stability, baseline recovery and rate capability, linearity of response, and crosstalk between channels are discussed
Precision charge amplification and digitization system for a scintillating and lead glass array
International Nuclear Information System (INIS)
A 544-channel low-noise, high-rate, precision charge amplification and ADC system was constructed for the Fermilab Experiment 705 electromagnetic calorimeter, which employs SCG1-C scintillating glass and SF5 lead glass instrumented with photo-multiplier tubes. A general discussion of the system is given, and the charge amplification, fast trigger pulse generation, and analog to digital conversion aspects of the system are presented in more detail. Performance is evaluated using data from Experiment 705 and from off-line tests. Short and long term pedestal stability, baseline recovery and rate capability, linearity of response, and crosstalk between channels are discussed. 8 refs., 2 tabs
Implementation of FPGA-Based Charge Control for a Self-Sufficient Solar Tracking Power Supply System
Directory of Open Access Journals (Sweden)
Jui-Ho Chen
2016-02-01
Full Text Available This study used a field-programmable gate array (FPGA with a Xilinx Spartan-3 FPGA to implement Reflex charge control in a dual-axis solar tracking system with maximum power point tracking (MPPT. The chaos embedded particle swarm optimization method was used to search for the optimum gain constants of the PI controller and the Reflex charging frequency. This scheme not only increases the output power of solar panels but also has a significant effect on switching loss and oscillation of solar charging. The experiment results showed that the proposed method can also significantly improve temperature rise, and that charging efficiency is also better than it is in a traditional charge mode. The results also showed that charging power was enough for solar tracking and the requirements of the charging system. The most significant contribution of this paper is that the scheme can be applied to any active solar tracking and charging system.
Synthetic system mimicking the energy transfer and charge separation of natural photosynthesis
Energy Technology Data Exchange (ETDEWEB)
Gust, D.; Moore, T.A.
1985-05-01
A synthetic molecular triad consisting of a porphyrin P linked to both a quinone Q and a carotenoid polyene C has been prepared as a mimic of natural photosynthesis for solar energy conversion purposes. Laser flash excitation of the porphyrin moiety yields a charge-separated state Csup(+.)-P-Qsup(-.) within 100 ps with a quantum yield of more than 0.25. This charge-separated state has a lifetime on the microsecond time scale in suitable solvents. The triad also models photosynthetic antenna function and photoprotection from singlet oxygen damge. The successful biomimicry of photosynthetic charge separation is in part the result of multistep electron transfers which rapidly separate the charges and leave the system at high potential, but with a considerable barrier to recombination.
Institute of Scientific and Technical Information of China (English)
无
2000-01-01
Based on the density functional theory and the atom-bond electronegativity equalization model (ABEEM), a method is proposed to construct the softness matrix and to obtain the electron population normal modes (PNMs) for a closed system. Using this method the information about the bond charge polarization in a molecule can be obtained easily. The test calculation shows that the PNM obtained by this method includes all the modes about the bond charge polarization explicitly. And the bond charge polarization mode characterized by the biggest eigenvalue, which is the softest one of all modes related with chemical bonds, can describe the charge polarization process in a molecule as exquisitely as the corresponding ab initio method.
The non-equilibrium charge screening effects in diffusion-driven systems with pattern formation
Kuzovkov, V. N.; Kotomin, E. A.; de la Cruz, M. Olvera
2011-07-01
The effects of non-equilibrium charge screening in mixtures of oppositely charged interacting molecules on surfaces are analyzed in a closed system. The dynamics of charge screening and the strong deviation from the standard Debye-Hückel theory are demonstrated via a new formalism based on computing radial distribution functions suited for analyzing both short-range and long-range spacial ordering effects. At long distances the inhomogeneous molecular distribution is limited by diffusion, whereas at short distances (of the order of several coordination spheres) by a balance of short-range (Lennard-Jones) and long-range (Coulomb) interactions. The non-equilibrium charge screening effects in transient pattern formation are further quantified. It is demonstrated that the use of screened potentials, in the spirit of the Debye-Hückel theory, leads to qualitatively incorrect results.
Charge properties of the hadronic system in vp and overlineν p interactions
Allen, P.; Grässler, H.; Lanske, D.; Schulte, R.; Böckmann, K.; Geich-Gimbel, C.; Nellen, B.; Saarikko, H.; Bosetti, P.; Cocconi, V. T.; Grant, A.; Hulth, P. O.; Klein, H.; Morrison, D. R. O.; Peyrou, Ch.; Schmid, P.; Sliwa, K.; Wachsmuth, H.; Aderholz, M.; Coghen, T.; Schmitz, N.; Settles, R.; Steinfeld, P.; Wernhard, K. L.; Wittek, W.; Batley, R.; Myatt, G.; Saitta, B.; Aachen-Bonn-CERN-München(MPI)-Oxford Collaboration
1982-04-01
Charge properties of the hadronic systems from νp and overlineνp scattering in BEBC are studied in the framework of the quark-parto model (QPM). The average charges charge and energy flow in the angular variable λ is demonstrated. The ratios ΔQ overlineν/ΔQ ν of charge flows in νp a overlineνp scattering are in accord with the QPM in both hemispheres.
Two- and three-body calculations within the dominantly orbital state method
International Nuclear Information System (INIS)
The dominantly orbital state method allows a semiclassical description of quantum systems. At the origin, it was developed for two-body relativistic systems. Here, the method is extended to treat two-body Hamiltonians and systems with three identical particles, in D⩾2 dimensions, with arbitrary kinetic energy and potential. This method is very easy to implement and can be used in a large variety of fields. Results are expected to be reliable for large values of the orbital angular momentum and small radial excitations, but information about the whole spectrum can also be obtained in some very specific cases.
Three-body hadronic structure of low-lying $1/2^+$ $\\Sigma$ and $\\Lambda$ resonances
Torres, A. Martínez; Khemchandani, K. P.; E. Oset
2008-01-01
We discuss the dynamical generation of some low-lying $1/2^+$ $\\Sigma$'s and $\\Lambda$'s in two-meson one-baryon systems. These systems have been constructed by adding a pion in $S$-wave to the $\\bar{K} N$ pair and its coupled channels, where the $1/2^-$ $\\Lambda$(1405)-resonance gets dynamically generated. We solve Faddeev equations in the coupled-channel approach to calculate the $T$-matrix for these systems as a function of the total energy and the invariant mass of one of the meson-baryon...
Design of Image Processing System Based on Charge Coupled Device
Directory of Open Access Journals (Sweden)
Xu Guosheng
2013-01-01
Full Text Available To speed up the image acquisition and make full use of effective information, a design method of CCD partial image scanning system is presented. The system achieves to functions of the high -speed data collection, the high -speed video data compression the real time video data Network Transmission and the real time compression picture data storage. the data processed was transferred to PC through USB2.0 real-time to reconstruct defects microscopic images. The experimental results demonstrated that defects within 50μm～1000μm were inspected effectively by the CCD scanning defects inspection instrument, that this method has a repetition error no more than 2.24 pixels, with high precision and good anti-noise ability.
Nuclear three-body problem in the complex energy plane: Complex-Scaling-Slater method
Kruppa, A T; Nazarewicz, W; Michel, N
2013-01-01
The physics of open quantum systems is an interdisciplinary area of research. The nuclear "openness" manifests itself through the presence of the many-body continuum representing various decay, scattering, and reaction channels. As the radioactive nuclear beam experimentation extends the known nuclear landscape towards the particle drip lines, the coupling to the continuum space becomes exceedingly more important. Of particular interest are weakly bound and unbound nuclear states appearing around particle thresholds. Theories of such nuclei must take into account their open quantum nature. To describe open quantum systems, we introduce a Complex Scaling (CS) approach in the Slater basis. We benchmark it with the complex-energy Gamow Shell Model (GSM) by studying energies and wave functions of the bound and unbound states of the two-neutron halo nucleus 6He viewed as an $\\alpha$+ n + n cluster system. In the CS approach, we use the Slater basis, which exhibits the correct asymptotic behavior at large distances...
corr3p_tr: A particle approach for the general three-body problem
Edvardsson, S.; Karlsson, K.; Olin, H.
2016-03-01
This work presents a convenient way to solve the non-relativistic Schrödinger equation numerically for a general three-particle system including full correlation and mass polarization. Both Coulombic and non-Coulombic interactions can be studied. The eigensolver is based on a second order dynamical system treatment (particle method). The Hamiltonian matrix never needs to be realized. The wavefunction evolves towards the steady state solution for which the Schrödinger equation is fulfilled. Subsequent Richardson extrapolations for several meshes are then made symbolically in matlab to obtain the continuum solution. The computer C code is tested under Linux 64 bit and both double and extended precision versions are provided. Test runs are exemplified and, when possible, compared with corresponding values in the literature. The computer code is small and self contained making it unusually simple to compile and run on any system. Both serial and parallel computer runs are straight forward.
Three-Body Faddeev Approach to Two-Proton Emissions from 18Ne Excited State
Institute of Scientific and Technical Information of China (English)
YU Ning; LIU Fu-Qing; ZHANG Huan-Qiao
2009-01-01
The proton drip line nucleus ~(18)Ne is considered as a system of two protons and a 16O core. The excitation-energy spectrum of ~(18)Ne and the relative-momentum distribution of the two protons emitted from the 6.15 MeV level of ~(18)Ne are calculated using the Faddeev approach.
Time domain analysis of superradiant instability for the charged stringy black hole–mirror system
Directory of Open Access Journals (Sweden)
Ran Li
2015-11-01
Full Text Available It has been proved that the charged stringy black holes are stable under the perturbations of massive charged scalar fields. However, superradiant instability can be generated by adding the mirror-like boundary condition to the composed system of charged stringy black hole and scalar field. The unstable boxed quasinormal modes have been calculated by using both analytical and numerical methods. In this paper, we further provide a time domain analysis by performing a long time evolution of charged scalar field configuration in the background of the charged stringy black hole with the mirror-like boundary condition imposed. We have used the ingoing Eddington–Finkelstein coordinates to derive the evolution equation, and adopted Pseudo-spectral method and the forth-order Runge–Kutta method to evolve the scalar field with the initial Gaussian wave packet. It is shown by our numerical scheme that Fourier transforming the evolution data coincides well with the unstable modes computed from frequency domain analysis. The existence of the rapid growth mode makes the charged stringy black hole a good test ground to study the nonlinear development of superradiant instability.
A non-orthogonal harmonic-oscillator basis for three-body problems
International Nuclear Information System (INIS)
A set of harmonic-oscillator states suitable for the representation of the wave function of the bound states of a system of three identical particles, is presented. As an illustration of the possibilities of the states defined in this paper, they are applied in a variational determination of the lowest symmetric S state of 12C, in the model of three structureless α particles interacting through the Coulomb force plus a phenomenological two-body force. (author)
Two and Three-body Contacts in the Unitary Bose Gas
Fletcher, Richard J.; Lopes, Raphael; Man, Jay; Navon, Nir; Smith, Robert P.; Zwierlein, Martin W.; Hadzibabic, Zoran
2016-01-01
In many-body systems governed by pairwise contact interactions, a wide range of observables is linked by a single parameter, the two-body contact, which quantifies two-particle correlations. This profound insight has transformed our understanding of strongly interacting Fermi gases. Here, using Ramsey interferometry, we study coherent evolution of the resonantly interacting Bose gas, and show that it cannot be explained by only pairwise correlations. Our experiments reveal the crucial role of...
Paul, Saurabh; Johnson, P R; Tiesinga, Eite
2016-01-01
We show that for ultra-cold neutral bosonic atoms held in a three-dimensional periodic potential or optical lattice, a Hubbard model with dominant, attractive three-body interactions can be generated. In fact, we derive that the effect of pair-wise interactions can be made small or zero starting from the realization that collisions occur at the zero-point energy of an optical lattice site and the strength of the interactions is energy dependent from effective-range contributions. We determine...
Three-body calculation of the Delta-Delta dibaryon candidate D(03) at 2.37 GeV
Gal, Avraham; Garcilazo, Humberto
2013-01-01
The D(03) dibaryon is generated dynamically as a resonance pole in a pion-nucleon-Delta' three-body model, where Delta' is a stable Delta baryon. Using separable interactions dominated by the Delta(1232) isobar for pion-nucleon and by the D(12) isobar for nucleon-Delta', where D(12) is the nucleon-Delta 2150 MeV dibaryon deduced in and constrained by 1D2 pp scattering, the model reduces to an effective two-body problem for Delta-Delta' which is solved. The mass and width of D(03) are found cl...
Three-body calculation of the Delta-Delta dibaryon candidate D(03) at 2.37 GeV
Gal, Avraham
2013-01-01
The I(JP)=0(3+) D(03) dibaryon candidate observed as resonance at 2.37 GeV in pion-production pn collisions by WASA@COSY is relegated within a dynamical pion-nucleon-Delta three-body model to a Delta-Delta (upper) pion-D(12) (lower) coupled-channel quasi-bound dibaryon state, where D(12) is the dibaryon observed in the 1D2 partial wave of pp scattering at 2.15 GeV
Authentication System for Electrical Charging of Electrical Vehicles in the Housing Development
Song, Wang-Cheol
Recently the smart grid has been a hot issue in the research area. The Electric Vehicle (EV) is the most important component in the Smart Grid, having a role of the battery component with high capacity. We have thought how to introduce the EV in the housing development, and for proper operation of the smart grid systems in the housing area the authentication system is essential for the individual houses. We propose an authentication system to discriminate an individual houses, so that the account management component can appropriately operate the electrical charging and billing in the housing estate. The proposed system has an architecture to integrate the charging system outside a house and the monitoring system inside a house.