Open AccessMechanism of E′ center formed by irradiation with high energy particles in silica glasses
Author(s) -
Xiao Zhongyin,
Tingyun Wang,
Wenyun Luo,
Wang Zi-hua
Publication year - 2008
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.57.2273
Subject(s) - materials science , irradiation , active center , crystallographic defect , center (category theory) , silica glass , saturation (graph theory) , kinetic energy , activation energy , f center , chemistry , condensed matter physics , composite material , crystallography , catalysis , nuclear physics , physics , quantum mechanics , biochemistry , mathematics , combinatorics
In this paper, a kinetic model for the radiation-induced production of the intrinsic point defect E′ center is proposed. The relation of E′ center concentration changing with dose is obtained. The results show that the production of E′ center includes two processes, i.e. the creation of new defects and the activation of preexisting defects. The stained bonds (or oxygen replacement) in silica networks lead to the creation of new defects, whose concentration increases linearly with the dose. The preexisting defects produce the activation, which tends to saturation. The theoretical result is in good agreement with the experiment.