文献类型：期刊文献

英文题名：Gamma-ray irradiation induced bulk photochromism in WO3-P2O5 glass

作者：Shen, Wei[1];Baccaro, Stefania[2];Cemmi, Alessia[2];Xu, Xiaoqing[1,2];Chen, Guorong[1]

机构：[1]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]ENEA UTTMAT IRR, I-00123 Rome, Italy

年份：2015

卷号：362

起止页码：34

外文期刊名：NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

收录：;EI(收录号：20153801293505);WOS:【SCI-EXPANDED(收录号:WOS:000364883800007)】；

基金：This study was supported by Shanghai Leading Academic Discipline Project (No. B502), National Natural Science Foundation of China (NSFC 51572081) and Doctoral Fund of Ministry of Education of China (20120074110018).

语种：英文

外文关键词：Photochromism; Gamma-ray irradiation; WO6 clusters; Recovery

摘要：In the present work, photochromism of WO3-P2O5 glass under gamma-ray irradiation was reported. As-prepared glass samples with different WO3 content are all optically transparent in the visible wavelength range thanks to the addition of a small amount of oxidizing couple Sb2O3-NaNO3. The photochromic properties are identified by transmission spectra of the glasses before and after irradiation. The results show that the irradiation induced darkening results from the reduction of W6+ to W5+ or W4+. The existence of WO6 clusters in glasses of high WO3 content is proved by XPS, which is the main reason for the obvious photochromic effects. The WO3-P2O5 glass is a promising candidate in gamma-ray sensitive detector. (C) 2015 Elsevier B.V. All rights reserved.