Open AccessCalculation of positron bulk lifetime of sphalerite crystalloid
Author(s) -
Jie Zhang,
Xianglei Chen,
Hao Ying-Ping,
Bangjiao Ye,
Du Huai-Jiang
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.5828
Subject(s) - positron , superposition principle , positron annihilation , local density approximation , lattice (music) , materials science , physics , atomic physics , electron , nuclear physics , condensed matter physics , electronic structure , quantum mechanics , acoustics
Here, we calculated theoretically the positron bulk lifetime of cuprous halide (except CuI,which has not the blende structure) and some borides with the method of atomic superposition approximation (ATSUP) on the basis of the theory of local density approximation (LDA) and general gradient approximation (GGA),the calculated results are in good agreement with the experiment. On the other hand, the positron lifetime of many other compounds which have blende structure are calcualted,and the results agree with the results published in literatur. Here we take the CuCl as an example,the pictures of the electron potential energy distribution, probability density of positron and positron annihilation rate are given. Finally the systematic results were fitted with curve as a function of lattice constants, and the fitted results are compared with the outcomes of other articles.