Optical absorption spectra of 10-MeV electron-irradiated paratellurite single crystals

Authors
Azhniuk, YM Gomonnai, AV Goyer, DB Holovey, VM Megela, IG Lopushansky, VV
Citation
Ym. Azhniuk et al., Optical absorption spectra of 10-MeV electron-irradiated paratellurite single crystals, RADIAT EFF, 153(3), 2001, pp. 205-210
Citations number
7
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
RADIATION EFFECTS AND DEFECTS IN SOLIDS
ISSN journal
10420150 → ACNP
Volume
153
Issue
3
Year of publication
2001
Pages
205 - 210
Database
ISI
SICI code
1042-0150(2001)153:3<205:OASO1E>2.0.ZU;2-V
Abstract
Optical absorption spectra of TeO2 crystals, irradiated at room temperature by up to 2.10(18) cm(-2) 10-MeV electrons and subsequently annealed to 575 K, are studied. The dependence of Urbach absorption edge parameters in TeO 2 on the electron beam fluence is discussed. The irradiation-induced near-e dge broad (2.5-3.5 eV) absorption band is shown to be related to oxygen vac ancies, annealing at 475-525 K.