<abstract xmlns="http://www.w3.org/1999/xhtml">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.</abstract>

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.

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

Institute of Physics, University of Silesia, 4 Uniwersytecka Str., 40-007 Katowice, Poland, Tel.: +48 32 359 1888, Fax: +48 32 258 8431

Department of Physics, Federal University of Sergipe (UFS), Av. Marechal Rondon, s/n, 49100-000 São Cristóvão-SE, Brazil

Nukleonika

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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

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...

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

Published Online: Mar 17, 2016

Page range: 49 - 52

Received: Jul 31, 2014

Accepted: Jul 09, 2015

DOI: https://doi.org/10.1515/nuka-2016-0011

Keywords
thermoluminescent detectors, MgBO:Dy, LiF:Mg,Ti

© 2016 Monika Paluch-Ferszt et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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

Published Online: Mar 17, 2016

Page range: 49 - 52

Received: Jul 31, 2014

Accepted: Jul 09, 2015

DOI: https://doi.org/10.1515/nuka-2016-0011

Keywordsthermoluminescent detectors, MgBO:Dy, LiF:Mg,Ti

© 2016 Monika Paluch-Ferszt et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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

Keywords
thermoluminescent detectors, MgBO:Dy, LiF:Mg,Ti