The thermoluminescence response of Ge-doped flat fibre for proton beam measurements: A preliminary study

10th International Seminar on Medical Physics; 1st AMDI International Oncology Symposium

物理学;医药卫生

Hassan, M.F.^1 ; Abdul Rahman, W. N. Wan^2 ; Fadzil, M. S. Ahmad^1 ; Tominaga, T.^3 ; Geso, M.^4 ; Akasaka, H.^5 ; Bradley, D.A.^6,7 ; Noor, N. Mohd^1

Department of Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor

43400, Malaysia^1

School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan

16150, Malaysia^2

Department of Clinical Radiology, Faculty of Health Sciences, Hiroshima International University, Higashi-Hiroshima City, Hiroshima

739-2695, Japan^3

Discipline of Medical Radiations, School of Medical Sciences, Royal Melbourne Institute, Technology University, Bundoora

VIC

3083, Australia^4

Division of Radiation Oncology, Kobe University Hospital, Kobe City, Hyogo

650-0017, Japan^5

Department of Physics, University of Surrey, Guildford

GU2 7XH, United Kingdom^6

Sunway University Institute for Health Care Development, Jalan Universiti, Selangor, Petaling Jaya

46150, Malaysia^7

关键词: Beam measurements;    Germaniums (Ge);    Postirradiation;    Relative response;    Reproducibilities;    Standard deviation;    Thermoluminescence response;    Thermoluminescent dosimeters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/851/1/012034/pdf
DOI  :  10.1088/1742-6596/851/1/012034

学科分类：卫生学

来源: IOP

【 摘 要 】

The aim of this study was to investigate the thermoluminescence (TL) response of fabricated 2.3 mol% and 6.0 mol% germanium (Ge) doped flat optical fibres to proton irradiation. The fundamental dosimetric characteristics of the fibres have been investigated including dose linearity, reproducibility and fading. The thermoluminescent dosimeters (TLDs) were used as a reference dosimeter to allow the relative response of the fibres. The results show that Ge-doped flat fibres offer excellent dose linearity over the dose range from 1 Gy up to 10 Gy with correlation of determination (R2) of 0.99. The fibres also demonstrated good reproducibility within the standard deviation (SD) of 0.86% to 6.41%. After 96 days post-irradiation, TLD-100 chips gave rise to the least loss in TL signal at around 18% followed by fabricated 2.3 mol% Ge-doped flat fibres about 24%. This preliminary study has demonstrated that the proposed fabricated Ge-doped flat fibre offers a promising potential for use in proton beam measurements.