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Room-temperature effects of UV radiation in KBr:Eu{sup 2+} crystals

Abstract

Thermoluminescence and optical absorption measurements have been carried out in KBr:Eu{sup 2+} crystals irradiated with monochromatic UV light (200-300 nm) and x-rays at room temperature. For UV- and x-irradiated crystals strong similarities between the thermoluminescence glow curves have been found, suggesting that the low-energy UV radiation produces the same defects as produced by x-irradiation in this material. The thermoluminescence glow curves are composed of six glow peaks located at 337, 383, 403, 435, 475 and 509 K. Thermal annealing experiments in previously irradiated crystals show clearly a correlation between the glow peak located at 383 K and the F-centre thermal bleaching process. Also, the excitation spectrum for each thermoluminescence glow peak has been investigated, showing that the low-energy radiation induces the formation of F centres. (author)
Authors:
Perez-Salas, R; Melendrez, R; [1]  Aceves, R; Rodriguez, R; Barboza-Flores, M [2] 
  1. Centro de Investigacion Cientifica y de Educacion Superior de Ensenada - IFUNAM, Ensenada, Apartado Postal 2732 Ensenada, BC, 22800 (Mexico)
  2. Centro de Investigacion en Fisica, Universidad de Sonora, Apartado Postal 5-088 Hermosillo, Sonora, 83190 (Mexico)
Publication Date:
Jul 01, 1996
Product Type:
Journal Article
Reference Number:
EDB-01:058328
Resource Relation:
Journal Name: Journal of Physics. Condensed Matter; Journal Volume: 8; Journal Issue: 27; Other Information: Country of input: Austria; PBD: 1 Jul 1996
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; CRYSTAL STRUCTURE; EUROPIUM; OPTICS; TEMPERATURE DEPENDENCE; THERMOLUMINESCENCE; ULTRAVIOLET RADIATION
OSTI ID:
20169225
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0953-8984; JCOMEL; TRN: GB01$4765023595
Availability:
Available online at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-648X) http://www.iop.org/;INIS
Submitting Site:
GBN
Size:
page(s) 4983-4992
Announcement Date:

Citation Formats

Perez-Salas, R, Melendrez, R, Aceves, R, Rodriguez, R, and Barboza-Flores, M. Room-temperature effects of UV radiation in KBr:Eu{sup 2+} crystals. United Kingdom: N. p., 1996. Web. doi:10.1088/0953-8984/8/27/009.
Perez-Salas, R, Melendrez, R, Aceves, R, Rodriguez, R, & Barboza-Flores, M. Room-temperature effects of UV radiation in KBr:Eu{sup 2+} crystals. United Kingdom. doi:10.1088/0953-8984/8/27/009.
Perez-Salas, R, Melendrez, R, Aceves, R, Rodriguez, R, and Barboza-Flores, M. 1996. "Room-temperature effects of UV radiation in KBr:Eu{sup 2+} crystals." United Kingdom. doi:10.1088/0953-8984/8/27/009. https://www.osti.gov/servlets/purl/10.1088/0953-8984/8/27/009.
@misc{etde_20169225,
title = {Room-temperature effects of UV radiation in KBr:Eu{sup 2+} crystals}
author = {Perez-Salas, R, Melendrez, R, Aceves, R, Rodriguez, R, and Barboza-Flores, M}
abstractNote = {Thermoluminescence and optical absorption measurements have been carried out in KBr:Eu{sup 2+} crystals irradiated with monochromatic UV light (200-300 nm) and x-rays at room temperature. For UV- and x-irradiated crystals strong similarities between the thermoluminescence glow curves have been found, suggesting that the low-energy UV radiation produces the same defects as produced by x-irradiation in this material. The thermoluminescence glow curves are composed of six glow peaks located at 337, 383, 403, 435, 475 and 509 K. Thermal annealing experiments in previously irradiated crystals show clearly a correlation between the glow peak located at 383 K and the F-centre thermal bleaching process. Also, the excitation spectrum for each thermoluminescence glow peak has been investigated, showing that the low-energy radiation induces the formation of F centres. (author)}
doi = {10.1088/0953-8984/8/27/009}
journal = {Journal of Physics. Condensed Matter}
issue = {27}
volume = {8}
journal type = {AC}
place = {United Kingdom}
year = {1996}
month = {Jul}
}