金属钛中氦团簇融合的分子动力学模拟  

Coalescence of helium clusters in titanium crystals:Molecular dynamics simulation

作　　者：谢朝[1] 侯氢[1] 汪俊[1] 孙铁英[2] 龙兴贵[2] 罗顺忠[2] 

机构地区：[1]四川大学原子核科学技术研究所,辐射物理及技术教育部重点实验室,成都610064 [2]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《物理学报》2008年第8期5159-5164,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10775101,50671096)资助的课题~~

摘　　要：运用分子动力学方法研究了金属钛中氦的扩散聚集行为.在300—800K的温度范围内,模拟了钛基底中氦团簇之间的融合过程.研究发现,温度的升高会加快氦团簇的融合.在300—800K,融合后的氦团簇在所模拟的时间尺度内三维结构保持不变.模拟结果还表明,常温下氦团簇之间的吸引力是导致氦团簇融合的重要因素.In this paper,the helium behavior in titanium crystals has been simulated by molecular dynamics method.The coalescence of helium clusters has been investigated in great detail in a range from 300 to 800 K.It was found that increasing temperature contributes to the coalescence of helium clusters.However,the helium cluster resulting from coalescence assumes its three-dimensional configuration in this temperature range for the time scale of simulation.The simulation results also indicate that,at room temperature,the attractive force between helium clusters plays a key role in helium cluster coalescence.

关 键 词：氦团簇 团簇融合 分子动力学模拟 

分 类 号：O469[理学—凝聚态物理]