Antisymmetrized molecular dynamics of wave packets with stochastic incorporation of the Vlasov equation

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.53.2958· OSTI ID:284780

Ono, A ^[1]; Horiuchi, H ^[2]

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1. Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01 (Japan)
2. Department of Physics, Kyoto University, Kyoto 606-01 (Japan)

On the basis of the antisymmetrized molecular dynamics (AMD) of wave packets for the quantum system, a novel model (called AMD-V) is constructed by the stochastic incorporation of the diffusion and the deformation of wave packets which is calculated by the Vlasov equation without any restriction on the one-body distribution. In other words, the stochastic branching process in molecular dynamics is formulated so that the instantaneous time evolution of the averaged one-body distribution is essentially equivalent to the solution of the Vlasov equation. Furthermore, as usual molecular dynamics, AMD-V keeps the many-body correlation and can naturally describe the fluctuation among many channels of the reaction. It is demonstrated that the newly introduced process of AMD-V has drastic effects in heavy ion collisions of {sup 40}Ca+{sup 40}Ca at 35 MeV/nucleon, especially on the fragmentation mechanism, and AMD-V reproduces the fragmentation data very well. Discussions are given on the interrelation among the frameworks of AMD, AMD-V, and other microscopic models developed for the nuclear dynamics. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 284780
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 6 Vol. 53; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BOLTZMANN-VLASOV EQUATION
CALCIUM 40 REACTIONS
CALCIUM 40 TARGET
CORRELATIONS
DEFORMATION
DIFFUSION
FRAGMENTATION
GEV RANGE 01-10
MOLECULAR DYNAMICS CALCULATIONS
STOCHASTIC PROCESSES
WAVE PACKETS