| 多体作用对氦原子团簇He9压缩特性的贡献 |
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| 引用本文： | 刘福生 Gao清泉.多体作用对氦原子团簇He9压缩特性的贡献[J].高压物理学报,1995,9(4):270-274. |
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| 作者姓名： | 刘福生 Gao清泉 |
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| 作者单位： | 中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室，四川联合大学应用物理所 |
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| 基金项目： | 中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室科研基金 |
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| 摘 要： | 采用Lowdin方法计算了处于压缩状态的氦原子团簇He9体心立方向型的排斥势及其多体分量，并由此计算出团簇微观压强及其多体分压强。结果发现，多体作用对氦原子团簇He9压缩特性贡献较大。在相同体积下，由两体近似方法计算的体系压强比多原子体系实际压强偏高10%~30%；考虑三体分压强修正后，近似理论的计算值又会偏低1.5%~10%；只有同时考虑三体、四体修正后，近似理论计算值与实际多原子体系的压强值基本一致。团簇He9所表现出的压缩特性与固态氦的实验结果相符合。
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| 关 键 词： | 多体作用 原子团簇 压缩特性 |
| 收稿时间： | 1995-01-03; |
MANY-BODY CONTRIBUTIONS FOR THE COMPRES-SIBILITY OF HELIUM ATOMIC CLUSTER |
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| LIU Fu-Sheng,GOU Qing-Quan,JING Fu-Qian.MANY-BODY CONTRIBUTIONS FOR THE COMPRES-SIBILITY OF HELIUM ATOMIC CLUSTER[J].Chinese Journal of High Pressure Physics,1995,9(4):270-274. |
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| Authors: | LIU Fu-Sheng GOU Qing-Quan JING Fu-Qian |
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| Institution: | 1. Laboratory for Shock Wave and Detonation Physics Research, Southuest Institute of Fluid Physics, Chengdu 610003, China;2. Institute of Applied Physics, Sichuan Union University, Chengdu 610065, China |
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| Abstract: | Lowdin scheme was applied to calculate the repulsive potentials and their multi-body expansions of compressed atomic cluster He9. The micro-pressure and their expansions were calculated. The results show that many-body effects are important for the compressibility of atomic cluster He9. At the same volume, the pressure calculated by two-body approximation is 10%～30% higher than the actual many-body system. If three-body corrections are considered, the results become 1.5%～10% lower. When the four-body effect was included, the approximation calculations fit real system quite well. The compression properties of atomic cluster He9 are similar to the experimental results of solid helium. |
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| Keywords: | many-bordy interaction atomic cluster compressibility |
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