Self-consistent field method and non-self-consistent field method for calculating the positron lifetime

doi:10.1088/1674-1056/19/11/117802

中国物理B ›› 2010, Vol. 19 ›› Issue (11): 117802-118101.doi: 10.1088/1674-1056/19/11/117802

Self-consistent field method and non-self-consistent field method for calculating the positron lifetime

张杰, 刘建党, 陈祥磊, 叶邦角

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

收稿日期:2010-01-24 修回日期:2010-05-11 出版日期:2010-11-15 发布日期:2010-11-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10675115) and the Important Direction Project of the Chinese Academy of Sciences.

Self-consistent field method and non-self-consistent field method for calculating the positron lifetime

Zhang Jie(张杰)^†, Liu Jian-Dang(刘建党),Chen Xiang-Lei(陈祥磊), and Ye Bang-Jiao(叶邦角)

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

Received:2010-01-24 Revised:2010-05-11 Online:2010-11-15 Published:2010-11-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10675115) and the Important Direction Project of the Chinese Academy of Sciences.

摘要/Abstract

摘要： Many methods are used to calculate the positron lifetime, these methods could be divided into two main types. The first method is atomic superposition approximation method and the second one is the so called energy band calculation method. They are also known as the non-self-consistent field method and self-consistent field method respectively. In this paper, we first introduce the two basic methods and then, we take Si as an example and give our calculation results, these results coincide with our latest experimental results, finally, we discuss the advantages and disadvantages of the two methods.

Abstract: Many methods are used to calculate the positron lifetime, these methods could be divided into two main types. The first method is atomic superposition approximation method and the second one is the so called energy band calculation method. They are also known as the non-self-consistent field method and self-consistent field method respectively. In this paper, we first introduce the two basic methods and then, we take Si as an example and give our calculation results, these results coincide with our latest experimental results, finally, we discuss the advantages and disadvantages of the two methods.

Key words: positron lifetime, atomic superposition approzimetion method, pseudopotential method

中图分类号: (Density functional theory, local density approximation, gradient and other corrections)

71.15.Mb

78.70.Bj (Positron annihilation)

张杰, 刘建党, 陈祥磊, 叶邦角. Self-consistent field method and non-self-consistent field method for calculating the positron lifetime[J]. 中国物理B, 2010, 19(11): 117802-118101.

Zhang Jie(张杰), Liu Jian-Dang(刘建党),Chen Xiang-Lei(陈祥磊), and Ye Bang-Jiao(叶邦角). Self-consistent field method and non-self-consistent field method for calculating the positron lifetime[J]. Chin. Phys. B, 2010, 19(11): 117802-118101.

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Self-consistent field method and non-self-consistent field method for calculating the positron lifetime

Self-consistent field method and non-self-consistent field method for calculating the positron lifetime

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