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Open Access Green as soon as Postprint is submitted to ZB.
A method of individual calibration of LiF optical absorption dosemeters.
Radiat. Prot. Dosim. 47, 581-583 (1993)
Optical grade crystals of lithium fluoride (LiF) have been developed for high level (50 MGy) and high temperature (250°C) dosimetry at GSF, based on optical density (OD) measurements. The measuring accuracy however was limited by a relatively high coefficient of variation (20%) for the interspecimen scattering of response. A method is described to improve precision by individual probe calibration at a relatively low dose level (1 kGy) by using F-centres only. It is shown that the calibration factors are applicable at high doses, where other centres are involved. By this procedure, the coefficient of variation for interspecimen scattering can be reduced to ≤ 5%. Thermoluminescence (TL) and trace element analysis was performed to find an explanation for the interspecimen scattering. While no correlation could be found between optical density and trace element content and between optical density and TL, a strong correlation was observed between optical density and fluorescence.
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Publication type
Article: Journal article
Document type
Scientific Article
ISSN (print) / ISBN
0144-8420
e-ISSN
1742-3406
Journal
Radiation Protection Dosimetry
Quellenangaben
Volume: 47,
Issue: 1-4,
Pages: 581-583
Publisher
Oxford University Press
Publishing Place
Oxford
Reviewing status
Peer reviewed