Thermoluminescence response of Ge-doped SiO2 fibres to electrons, X- and γ -radiation

被引：15

作者：

Entezam, A. ^{[1
]}

Khandaker, M. U. ^{[1
]}

Amin, Y. M. ^{[1
]}

Ung, N. M. ^{[2
]}

Maah, J. ^{[3
]}

Bradley, D. A. ^{[4
]}

机构：

[1] Univ Malaya, Fac Sci, Dept Phys, Kuala Lumpur 50603, Malaysia

[2] Univ Malaya, Fac Med, Clin Oncol Unit, Kuala Lumpur 50603, Malaysia

[3] Univ Malaya, Fac Sci, Dept Chem, Kuala Lumpur 50603, Malaysia

[4] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

来源：

RADIATION PHYSICS AND CHEMISTRY | 2016年 / 121卷

关键词：

Ge-doped fibre; X-; gamma-; and electron irradiation; Thermoluminescence; Dosimetry; OPTICAL-FIBER; TL PROPERTIES; DOSIMETER; PHOTON;

D O I：

10.1016/j.radphyschem.2016.01.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

For doses from 10 cGy to 80 Gy, we investigate the thermoluminescence (TL) response of tailor-made Gedoped SiO2 fibres for accelerated electrons (6, 12 and 20 MeV), megavoltage X-rays (6, 10 MV) and 1.25 MeV gamma-rays, delivered by a linear accelerator (LINAC) and a Co-60 irradiator respectively. Fibres of various dimensions were fabricated, obtained with doping concentrations from 6% to 10% Ge. The fibres are observed to provide a linear response with radiation dose, an overall reproducibility of 1-5%, and inappreciable dependence on energy, field-size and angular variation. For fibres exposed to 6 MV X-rays, the response increases with core size, the 6% Ge-doped fibres providing the greatest TL yield. The fibres exhibit uniformity of response and provide the basis of a promising TL, system for radiotherapy applications, offering high spatial resolution and sensitivity. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：115 / 121

页数：7

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