Interatomic potential for the condensed phases of helium atoms

被引：8
|
作者：
Ujevic, S [1 ]
Vitiello, SA [1 ]
机构：
[1] Univ Estadual Campinas, Inst Fis, BR-13083 Campinas, SP, Brazil
来源：
PHYSICAL REVIEW B | 2006年 / 73卷 / 01期
关键词：
D O I：
10.1103/PhysRevB.73.012511
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Results from diffusion Monte Carlo have been used in fits of a damping function of the triple dipole and of the intensity of the exchange three-body interactions. The equations of state obtained considering this three-body potential are in excellent agreement with experiment both at the solid and liquid phases. The calculations show that exchange nonadditivities that contribute less than 0.2% of the two-body potential energy in the solid phase are needed to describe the properties of a system of helium atoms.
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页数：4
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