Thermoluminescence and optically stimulated luminescence studies of Gypsum for retrospective dosimetry

IF 1.6 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Applied Radiation and Isotopes Pub Date : 2024-09-13 DOI:10.1016/j.apradiso.2024.111523

引用次数: 0

Abstract

This study examines the use of gypsum for radiation dosimetry using Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL) techniques. It is observed that gypsum preserves the information of radiation dose despite the loss of water upon heating in a laboratory. Deconvolution of the thermoluminescence glow curve suggests thermoluminescence glow peaks at 125, 150, 280, 320, and 440 °C. The glow peak at 440 °C has a minimum detectable dose of 200 mGy, and it bleaches to approximately 50% with 300 min of daylight exposure. The Blue Light Stimulated Luminescence (BLSL) comprises a slow component and is correlated to 255 °C TL glow peak. The alpha efficiency of luminescence production per unit Gy of alpha dose with respect to the beta dose for the TL glow peaks at 440 °C is calculated at 0.18 ± 0.01. For BLSL, the value is calculated at 0.15 ± 0.01. A measurement protocol for the use of gypsum for retrospective dosimetry is also presented.

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用于追溯剂量测定的石膏热致发光和光致发光研究

本研究利用热致发光（TL）和光致发光（OSL）技术研究了石膏在辐射剂量测定中的应用。研究发现，尽管石膏在实验室加热时会失去水分，但它仍能保留辐射剂量的信息。热释光辉光曲线的解卷积表明，热释光辉光峰分别位于 125、150、280、320 和 440 ℃。440 °C 的发光峰的最小可检测剂量为 200 mGy，日光照射 300 分钟后，发光峰的漂白率约为 50%。蓝光激发发光（BLSL）由慢速成分组成，与 255 °C TL 辉光峰相关。根据计算，在 440 °C 的 TL 辉光峰上，相对于贝塔剂量，每单位 Gy α 剂量产生的发光效率为 0.18 ± 0.01。对于 BLSL，计算值为 0.15 ± 0.01。此外，还介绍了使用石膏进行追溯剂量测定的测量规程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.