Correlation of optically and thermally stimulated luminescence of natural fluorite pellets

F. A. Ferreira; E. M. Yoshimura; N. K. Umisedo; R. P. Do Nascimento

doi:10.1016/j.radmeas.2014.02.020

Correlation of optically and thermally stimulated luminescence of natural fluorite pellets

F. A. Ferreira, E. M. Yoshimura, N. K. Umisedo, R. P. Do Nascimento

Radiation Physics

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Natural fluorite (CaF₂), a dosimetric material of large usage, presents Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL). This study examined the behavior of TL and OSL (stimulated with Blue LEDs) signals from the Brazilian natural fluorite pellets with NaCl as binding agent, as well as their correlations, in order to study and optimize the dosimetric process with this material. A series of experiments were conducted, basically with thermal treatments before OSL acquisition, and optical bleaching before TL readout. The role of NaCl in the TL and OSL emission was investigated. It was observed that natural CaF₂ TL signal is still ample to be used in dosimetric applications, as dose reassessment in personal dosimetry after an OSL measurement. Also it was verified that the fluorite OSL signal is extinguished by a 350°C heating and that NaCl has no contribution to the stable part of the OSL signal.

Original language	English (US)
Pages (from-to)	254-257
Number of pages	4
Journal	Radiation Measurements
Volume	71
DOIs	https://doi.org/10.1016/j.radmeas.2014.02.020
State	Published - Dec 2014

Keywords

Natural fluorite
Optically stimulated luminescence
Thermoluminescence

ASJC Scopus subject areas

Radiation
Instrumentation

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10.1016/j.radmeas.2014.02.020

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title = "Correlation of optically and thermally stimulated luminescence of natural fluorite pellets",

abstract = "Natural fluorite (CaF2), a dosimetric material of large usage, presents Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL). This study examined the behavior of TL and OSL (stimulated with Blue LEDs) signals from the Brazilian natural fluorite pellets with NaCl as binding agent, as well as their correlations, in order to study and optimize the dosimetric process with this material. A series of experiments were conducted, basically with thermal treatments before OSL acquisition, and optical bleaching before TL readout. The role of NaCl in the TL and OSL emission was investigated. It was observed that natural CaF2 TL signal is still ample to be used in dosimetric applications, as dose reassessment in personal dosimetry after an OSL measurement. Also it was verified that the fluorite OSL signal is extinguished by a 350°C heating and that NaCl has no contribution to the stable part of the OSL signal.",

keywords = "Natural fluorite, Optically stimulated luminescence, Thermoluminescence",

author = "Ferreira, {F. A.} and Yoshimura, {E. M.} and Umisedo, {N. K.} and {Do Nascimento}, {R. P.}",

note = "Funding Information: The authors would like to thank the Brazilian agencies S{\~a}o Paulo Research Foundation (FAPESP) ,grants #2010/16437-0 and #2012/13534-0 , National Council for Scientific and Technological Development (CNPq) and National Institute of Science and Technology - Radiation Metrology in Medicine (INCT) . Publisher Copyright: {\textcopyright} 2014 Elsevier Ltd. All rights reserved.",

year = "2014",

month = dec,

doi = "10.1016/j.radmeas.2014.02.020",

language = "English (US)",

volume = "71",

pages = "254--257",

journal = "Radiation Measurements",

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T1 - Correlation of optically and thermally stimulated luminescence of natural fluorite pellets

AU - Ferreira, F. A.

AU - Yoshimura, E. M.

AU - Umisedo, N. K.

AU - Do Nascimento, R. P.

N1 - Funding Information: The authors would like to thank the Brazilian agencies São Paulo Research Foundation (FAPESP) ,grants #2010/16437-0 and #2012/13534-0 , National Council for Scientific and Technological Development (CNPq) and National Institute of Science and Technology - Radiation Metrology in Medicine (INCT) . Publisher Copyright: © 2014 Elsevier Ltd. All rights reserved.

PY - 2014/12

Y1 - 2014/12

N2 - Natural fluorite (CaF2), a dosimetric material of large usage, presents Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL). This study examined the behavior of TL and OSL (stimulated with Blue LEDs) signals from the Brazilian natural fluorite pellets with NaCl as binding agent, as well as their correlations, in order to study and optimize the dosimetric process with this material. A series of experiments were conducted, basically with thermal treatments before OSL acquisition, and optical bleaching before TL readout. The role of NaCl in the TL and OSL emission was investigated. It was observed that natural CaF2 TL signal is still ample to be used in dosimetric applications, as dose reassessment in personal dosimetry after an OSL measurement. Also it was verified that the fluorite OSL signal is extinguished by a 350°C heating and that NaCl has no contribution to the stable part of the OSL signal.

AB - Natural fluorite (CaF2), a dosimetric material of large usage, presents Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL). This study examined the behavior of TL and OSL (stimulated with Blue LEDs) signals from the Brazilian natural fluorite pellets with NaCl as binding agent, as well as their correlations, in order to study and optimize the dosimetric process with this material. A series of experiments were conducted, basically with thermal treatments before OSL acquisition, and optical bleaching before TL readout. The role of NaCl in the TL and OSL emission was investigated. It was observed that natural CaF2 TL signal is still ample to be used in dosimetric applications, as dose reassessment in personal dosimetry after an OSL measurement. Also it was verified that the fluorite OSL signal is extinguished by a 350°C heating and that NaCl has no contribution to the stable part of the OSL signal.

KW - Natural fluorite

KW - Optically stimulated luminescence

KW - Thermoluminescence

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JO - Radiation Measurements

JF - Radiation Measurements

ER -

Correlation of optically and thermally stimulated luminescence of natural fluorite pellets

Abstract

Keywords

ASJC Scopus subject areas

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