Correlation between time and angular alignment in molecular dynamics simulations of heavy ion collisions

Correlation between time and angular alignment in molecular dynamics simulations of heavy ion collisions
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重离子碰撞分子动力学模拟中时间与角度排列的相关性

DOI:
10.1103/physrevc.102.064625
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发表时间:
2020
期刊:
影响因子:
3.1
通讯作者:
Krieble, K.
Krieble, K.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Harvey, B.;Youngs, M.;McIntosh, A. B.;Jedele, A.;Abbott, A.;Gauthier, J.;Hagel, K.;Hannaman, A.;Hood, A.;Krieble, K.

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中子-质子平衡是研究原子核物态方程中对称性能量项密度依赖性的一个过程。本研究利用约束分子动力学(CoMD)模拟的碰撞能量为35和45 MeV/核子。使用搜索CoMD事件并在PLF* 与目标分离并确定其寿命之后识别PLF* 的算法。它还确定PLF* 分裂成的片段,并确定它们的角度排列。这项技术提供了一个机会,探索如何动态产生的片段,αdyn的平均对齐,随着PLF* 寿命的演变。对35和35 °,dαdyn/dΔt分别为0.98±0.08rad/zs和0.08rad/zs,与星等呈近似线性关系,这与以前实验研究中所用的经典测定值一致。
Neutron-proton equilibration is a process which has been used to study the density dependence of the symmetry energy term in the nuclear equation-of-state. This study utilizes constrained molecular dynamics (CoMD) simulations ofwith collision energies of 35 and 45 MeV/nucleon. An algorithm is used which searches through CoMD events and identifies the PLF* after it separates from the target and determines its lifetime,. It also determines the fragments that the PLF* breaks apart into and determines their angular alignment. This technique gives an opportunity to explore how the average alignment of dynamically produced fragments, αdyn, evolves with PLF* lifetime. An approximately linear relationship was determined with dαdyn/dΔt=0.98±0.08rad/zs andfor the 35 and, respectively, indicating a correlation with magnitude consistent with classically determined values which were used for prior experimental studies.
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