摘要
基于团簇理论并计及邻近和次邻近原子对中心原子的屏蔽作用，我们用完全量子力学方法计算了ｈｃｐ结构固态氦的原子多体作用排斥势和等温压缩线。计算结果与５～２５ＧＰａ范围的静高压实验结果吻合较好。表明本文方法与过去提出的原子相互作用势相比，是合理的和比较好的。本文还对Ａｚｉｚ二体势、Ｌｏｕｂｅｙｒｅ三体势和Ｒｏｓ和Ｙｏｕｎｇ等效势的局限性做了讨论。
Based on the theory of atomic cluster and taking account of the screening effects induced by nearest neighbour and next nearest neighbour atoms,we have calculated the many body repulsive potential and isothermal compression curve for solid helium with hcp lattice configuration.The calculation result is in agreement with the experimental data that obtained from high static pressure measurements covering pressure range of about 5～25GPa,and therefore also more reasonable than those previously proposed.Discussions on the limitations of two body potential of Aziz,three body potential of Loubeyre,and equivalent potential of Ross and Young are also given in the paper.
出处
《高压物理学报》
CAS
CSCD
北大核心
1998年第2期145-149,共5页
Chinese Journal of High Pressure Physics
基金
中物院科学技术基金重点项目
关键词
团簇理论
压缩曲线
多体作用势
固态氦
高压
theory of atomic cluster, isothermal compression curve, many body interaction.
