Constrained molecular dynamics II: An N-body approach to nuclear systems
Constrained molecular dynamics II: An N-body approach to nuclear systems
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DOI：
10.1016/j.jcp.2005.02.032
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发表时间：
2005-02
影响因子：
4.1
通讯作者：
M. Papa;G. Giuliani;A. Bonasera
中科院分区：
文献类型：
--
作者：
M. Papa;G. Giuliani;A. Bonasera
在这项工作中，我们阐述了应用于核物理中 N 体问题的约束分子动力学的基本发展。通过定义一组基于脉冲力概念的变换，解决了与量子效应和系统费米子性质相关的繁重计算任务。特别是，在约束分子动力学模型的实施版本II中，与总角动量不守恒相关的问题已经得到解决。由于“硬核”排斥相互作用，更普遍的是随机力的使用，这个问题影响了其他半经典微观方法。还简要讨论了恢复守恒定律对 40Ca+40Ca 系统融合截面的影响。
In this work, we illustrate the basic development of the constrained molecular dynamics applied to the N-body problem in nuclear physics. The heavy computational tasks related to quantum effects, to the Fermionic nature of the system have been resolved out by defining a set of transformations based on the concept of impulsive forces. In particular, in the implemented version II of the constrained molecular dynamics model the problem related to the non-conservation of the total angular momentum has been solved. This problem affects other semi-classical microscopic approaches due to the “hard core” repulsive interaction and, more generally, to the usage of random forces. The effect of the restored conservation law on the fusion cross-section for the40Ca+40Ca system is also briefly discussed.