| 一种含势阱具有混合交换势形式的平均原子模型 |
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| 引用本文： | 贾洪祥,孟续军. 一种含势阱具有混合交换势形式的平均原子模型[J]. 物理学报, 2005, 54(1): 70-77 |
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| 作者姓名： | 贾洪祥 孟续军 |
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| 作者单位： | 北京应用物理与计算数学研究所计算物理实验室，北京 100088 |
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| 基金项目： | 国家自然科学基金(批准号：10174010)和冲击波物理与爆轰物理国防科技重点实验室基金( 批准号：51478030203ZW0902)资助的课题. |
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| 摘 要： | 对传统的简单平均原子模型（AAM）作了改进：1使用了动态自由电子判据；2将自由电子分为三种类型，分别用分波法和统计方法加以处理；3应用变分原理给出了一种混合形式的交换势取代了Slater势；4应用材料常态常数标定了原子结构中的参数.作为算例，计算并与实验比较了Fe,Ni,Cu的零温电子压强.关键词：平均原子结构交换势电子压强
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| 关 键 词： | 平均原子结构 交换势 电子压强 |
| 收稿时间： | 2004-03-05 |
| 修稿时间： | 2004-06-09 |
An average-atom model with potential-well and mixed form of exchange potential |
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| Jia Hong-Xiang and Meng Xu-Jun. An average-atom model with potential-well and mixed form of exchange potential[J]. Acta Physica Sinica, 2005, 54(1): 70-77 |
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| Authors: | Jia Hong-Xiang and Meng Xu-Jun |
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| Abstract: | A traditional average-atom model (AAM) is improved in several aspects. 1. A dynamic criterion for free electrons is adopted. 2. The free electrons are classifie d in three types, each of which is treated by the partial wave method and Fermi- Dirac statistics. 3. An exchange potential in mixed type is obtained to replace the Slater potential by applying the variation principle. 4. A parameter α in t he atomic structure is calibrated by the constants of material under normal cond itions. As examples electron pressures of Iron, Nickel and Copper at zero temper ature are calculated and compared with the results obtained by other theories an d in experiments. |
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| Keywords: | average-atom model exchange potential electron pressure |
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