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

• 来源期刊: 中国物理B（英文版）
• 关键词: positron lifetime atomic superposition approzimetion method pseudopotential method
• 年，卷（期）: 2010,（11）
• 页码范围: 658-661
• 页数: 4页
• 语种: 英文

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.