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The peculiarities of anion vacancy distribution and the relationship between their concentration and the Tld-500 detector Tl output
Authors
R. M. Abashev
I. I. Milman
A. I. Surdo
Publication date
1 January 2018
Publisher
'IOP Publishing'
Doi
Abstract
A procedure has been developed for estimating the uniformity of anion vacancy distribution in TLD-500 detectors on the basis of anion-deficient corundum single crystals. Vacancy distribution topograms were constructed for TLD-500 detectors with different sensitivities to irradiation. Analysis of the topograms provided correlations between average anion vacancy concentrations and thermoluminescent (TL) yields in the main peak with a maximum at 450 K. To confirm the pattern of regularities, the effects of high-temperature annealing of TLD-500 samples in air at T = 1700 K were studied depending on its duration. Increasing the annealing time from 40 to 105 minutes was found to correlatedly reduce the anion vacancy concentrations and TL-yields in the basic and high-temperature peaks at 450 and 830 K, respectively. © Published under licence by IOP Publishing Ltd.The work was partly supported by the Russian Foundation for Basic Research (Grant No. 18-08-00093-a) and UB RAS (pr. 18-11-2-2)
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Last time updated on 21/08/2019