Analysis of dosimetric peaks of MgB4O7:Dy (40% Teflon) versus LiF:Mg,Ti TL detectors

Paluch-Ferszt Monika; Kozłowska Beata; Oliveira de Souza Susana; Freire de Souza Luiza; Nascimento Souza Divanizia

doi:10.1515/nuka-2016-0011

Nukleonika (Mar 2016)

Analysis of dosimetric peaks of MgB4O7:Dy (40% Teflon) versus LiF:Mg,Ti TL detectors

Paluch-Ferszt Monika,
Kozłowska Beata,
Oliveira de Souza Susana,
Freire de Souza Luiza,
Nascimento Souza Divanizia

Affiliations

Paluch-Ferszt Monika: Institute of Physics, University of Silesia, 4 Uniwersytecka Str., 40-007 Katowice, Poland, Tel.: +48 32 359 1888, Fax: +48 32 258 843
Kozłowska Beata: Institute of Physics, University of Silesia, 4 Uniwersytecka Str., 40-007 Katowice, Poland, Tel.: +48 32 359 1888, Fax: +48 32 258 843
Oliveira de Souza Susana: Department of Physics, Federal University of Sergipe (UFS), Av. Marechal Rondon, s/n, 49100-000 São Cristóvão-SE, Brazil
Freire de Souza Luiza: Department of Physics, Federal University of Sergipe (UFS), Av. Marechal Rondon, s/n, 49100-000 São Cristóvão-SE, Brazil
Nascimento Souza Divanizia: Department of Physics, Federal University of Sergipe (UFS), Av. Marechal Rondon, s/n, 49100-000 São Cristóvão-SE, Brazil

DOI: https://doi.org/10.1515/nuka-2016-0011
Journal volume & issue: Vol. 61, no. 1
pp. 49 – 52

Abstract

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Magnesium tetraborate doped with dysprosium (MgB4O7:Dy) is known as a good thermoluminophor for personal dosimetry of gamma ray and X-ray radiation because of its high sensitivity and close tissue equivalence. This material can be produced by different routes. The sintered pastilles of magnesium tetraborate mixed with Teflon (40%) used in this work were manufactured at the Federal University of Sergipe, Department of Physics by the solid-state synthesis. Magnesium tetraborate was already used for high-dose dosimetry, exhibiting linearity for a wide range of doses. In this work, the authors examined its main characteristics prior to potential use of detectors in everyday dosimetry, comparing this material to a widely used LiF:Mg,Ti phosphor. The following tests influencing dosimetric peaks of MgB4O7:Dy were presented: (1) the shape of the glow curves, (2) annealing conditions and post-irradiation annealing and its influence for background of the detectors, (3) the choice of the heating rates at the read-out and (4) the threshold dose, that is, the lowest possible dose to be measured. Similar tests were performed with LiF:Mg,Ti detectors, produced and widely used in Poland. The results were compared and discussed.

Published in Nukleonika

ISSN: 0029-5922 (Print); 1508-5791 (Online)
Publisher: Sciendo
Country of publisher: Poland
LCC subjects: Science
Website: https://sciendo.com/journal/NUKA

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