Open AccessCalculation of positron lifetime of single crystals of elements of the periodic table with the theory of local density approximation
Author(s) -
Xianglei Chen,
Weiliang Kong,
Du Huai-Jiang,
Bangjiao Ye
Publication year - 2009
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.58.7627
Subject(s) - positron , positron annihilation , physics , annihilation , wave function , atom (system on chip) , atomic physics , nuclear physics , electron , computer science , embedded system
On the basis of local density approximation, superposed-neutral-atom model and the finite-difference method SNA-FD are used to calculate the positron bulk lifetime and positron monovacancy lifetime in crystals of elements of the periodic table. The distribution of positron wavefunction and positron annihilation rate are analyzed. The calculated results of positron bulk lifetime in elementary substance agree well with the experiment results in literatures, which shows that the method of SNA-FD is an effective method in the study of positron annihilation in elementary substance.