标题： 重核碰撞的量子分支过程的反称分子动力学 显示英文标题

标题： Antisymmetrized molecular dynamics with quantum branching processes for collisions of heavy nuclei

摘要： 采用量子分支过程的反称分子动力学（AMD）被重新表述，使其能够应用于重核碰撞，例如金-金多碎片反应。 由于波包扩散效应引起的量子分支过程被视为朗之万型运动方程中的随机项，其数值处理比之前论文中的方法简单得多。 此外，为了以远少于精确计算的计算时间评估运动方程中的哈密顿量，引入了一种新的近似公式，称为三环近似。 对150 MeV/核子的金-金中心碰撞进行了计算。 结果表明，AMD几乎完全再现了该反应中大量碎片的形成。 显示英文摘要

摘要： Antisymmetrized molecular dynamics (AMD) with quantum branching processes is reformulated so that it can be applicable to the collisions of heavy nuclei such as Au + Au multifragmentation reactions. The quantum branching process due to the wave packet diffusion effect is treated as a random term in a Langevin-type equation of motion, whose numerical treatment is much easier than the method of the previous papers. Furthermore a new approximation formula, called the triple-loop approximation, is introduced in order to evaluate the Hamiltonian in the equation of motion with much less computation time than the exact calculation. A calculation is performed for the Au + Au central collisions at 150 MeV/nucleon. The result shows that AMD almost reproduces the copious fragment formation in this reaction.