Novel fabricated germanium-doped optical fibres as high absorbed dose measurement detector for mapping gamma-ray Cesium-137

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2025-03-21 DOI:10.1016/j.radphyschem.2025.112736

K.S.A.K. Bakar , N.M. Noor , F. Idris

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引用次数: 0

Abstract

Measurement of radiation absorbed dose is crucial for assessing potential biological harm to living tissues, ensuring safety and precision in dose delivery to human tissue. TA-GVH disease is a prevalent complication of blood transfusion. The dose mapping method ensures that the radiation dose to the blood remains within the predetermined limits set by authorities up to 50 Gy. This study aims to explore the possibilities of using fabricated germanium-doped (Ge-doped) optical fibre dosimeters as a radiation dose mapper for quality assurance (QA).

Two types of fabricated 2.3mol % Ge-doped optical fibres were used, cylindrical (CF) and flat (FF), calibrated within a high dose range of 5–50 Gy using a Cobalt-60 machine at the SSDL, Nuclear Malaysia Agency. Dose mapping was conducted in a Cesium-137 source blood irradiator at the Pathology Department, HSAAS, using blood-equivalent phantom to gamma radiation of 25 Gy and comparing thermoluminescence (TL) signals with EBT-XD film.

The result showed no significant difference in mean absorbed dose between both optical fibres and External Beam Therapy (EBT) film. Both fibres exhibited a mean error of 4 %, and EBT-XD film was 3.4 %, indicating good agreement with the nominal dose value of 25 Gy.

High radiation exposure can be accurately monitored and assessed using a dosimetry method, such as Ge-doped optical fibre dosimetry. This passive dosimeter offers high sensitivity, cost-effectiveness, and reusability, making it a valuable alternative to conventional blood dosimetry. Comprehensive dose mapping allows for precise monitoring and evaluation of the radiation field, ensuring accurate assessment of radiation exposure in high-dose radiation environments.

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来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. 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. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.