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Study on the Dynamics of Sodium Cluster Collisions
Xu Xiulian,Chen Hongxia,Zhou Pengxia,Zeng Xianghua
Author NameAffiliationE-mail
Xu Xiulian College of Physics Science and Technology, Complexity Science Center of Yangzhou University, Yangzhou 225002 xuxiulian@sina.com  
Chen Hongxia College of Physics Science and Technology, Complexity Science Center of Yangzhou University, Yangzhou 225002;Department of Physics, Yancheng Teacher's College, Yancheng 224002  
Zhou Pengxia College of Physics Science and Technology, Complexity Science Center of Yangzhou University, Yangzhou 225002  
Zeng Xianghua College of Physics Science and Technology, Complexity Science Center of Yangzhou University, Yangzhou 225002  
Abstract:
With in the framework of distance dependent tight-binding molecular dynamics (DDTBMD), the collision dynamics of sodium cluster Na n has been studied systematically. Some phenomena have been observed at different impact parameters b , such as fusion reaction, deep inelastic collision (DIC) and quasi-elasticcollision, which are similar to the nuclear heavy-ion collisions (HIC). For the system of Na6 (3D) + Na8, the reaction mechanism at b=9a0 is DIC, but when b is equal to 13a0, it corresponds to quasi-elastic collision. Further more the rotation processes during the collisions, are related to the collision energy and parameter. The larger collision energy is, the earlier relative rotation will occur, and the relaxation time becomes shorter and the relative rotation energy is much smaller. There exists maximal relative rotation energy which corresponding to b = 7a0. When b is smaller than 7a0, the rotation energy increases with b increasing, otherwise the energyd ecreases. And the maximal relative rotation energy is corresponding to DIC process. The maximal rotation energy can reach on etenth of total energy, which is much less than that in HIC.
Key words:  Nan, DDTB-MD, Relative rotation, DIC
FundProject:
碱金属团簇碰撞动力学研究
徐秀莲*,陈红霞,周朋霞,曾祥华
摘要:
采用距离相关紧密束缚的分子动力学模型,研究了钠原子团簇的碰撞动力学行为.研究得出,对Na6(3D)+Na8系统,碰撞参数为b=9a0时,对应于深度非弹性碰撞过程(DIC), 在b=13a0时,则对应于准弹性碰撞过程.另外,得到碰撞过程中存在转动,其能量大小与碰撞能量Eproj/n以及碰撞参数b均有关系.随着Eproj/n的增大,相对转动减小;随着b的变化,转动能量先增大后减小.在b=7a0时转动最大,最大转动能量可达总能量的十分之一.
关键词:  钠原子团簇  紧束缚分子动力学模型  相对转动  深度非弹性碰撞
DOI:10.1088/1674-0068/17/5/543-546
分类号: