The calculation of positron lifetime in Ni3Al alloy

摘要：

Superposed-neutral-atom model and the finite-difference method (SNA-FD) are used to calculate the positron lifetime of different sizes and types of vacancy clusters in Ni3Al alloy. The calculated positron bulk lifetime in Ni3Al agrees well with the experimental results mentioned in literatures. The positron lifetimes of vacancy clusters with the same amount of vacancy but different components are also calculated. The results show that the positron lifetime is different when its components are different. The positron lifetimes of vacancy clusters with a single element but different sizes are also calculated. The result shows that the positron lifetime is almost a constant when its component is only Al vacancy, but the positron lifetime will increase at first and trend to be a constant when its component is only Ni vacancy.

关键词： positron lifetime Ni3Al alloy

作者: Chen Xiang-Lei Guo Wei-feng Du Huai-Jiang Weng Hui-Min Ye Bang-Jiao

作者单位: Department of Modern Physics,University of Science and Technology of China Department of Modern Physics,University of Science and Technology of China;Department of Physics,Art

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 146-148

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）