Open AccessA STUDY ON La-DOPED PbWO4 SCINTILLATING CRYSTAL
Author(s) -
Tang Xue-Feng,
Ming Gu,
Tong Hong-Yong,
Liang Liu,
Mingzhen Yao,
Lingyan Chen,
Jie Liao,
Shen Bin-Fu,
Qu Xiang-Dong,
Yin Zhi-Wen,
Wenjing Xu,
Wang Jing-C Heng
Publication year - 2000
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.49.2007
Subject(s) - dopant , doping , materials science , positron annihilation , crystal (programming language) , vacancy defect , x ray photoelectron spectroscopy , oxygen , positron , condensed matter physics , nuclear magnetic resonance , physics , optoelectronics , nuclear physics , electron , computer science , programming language , quantum mechanics
The changes of defects in PbWO4 crystal caused by La dopant have been studied by means of positron annihilation lifetime and X-ray photoelectron spec trum (XPS).The results show that La dopant enhance the concentration of lead vac ancy (Pb) which can be described as the positron capture center in PbWO4 crystal,and lead vacancy will furthermore introduce low-valent oxygen center.We discuss the mechanism of La doped in PbWO4,and consi der that oxygen vacancy is restrained by doping of La,while lead vacancy density is increased by La dopant.