The use of the TL and OSL phenomena for determination of absorbed dose rates of 90Sr+90Y sources by a postal method

被引：3

作者：

Antonio, Patricia L. ^{[1
]}

Pinto, Teresa C. N. O. ^{[1
,2
]}

Silva, Rogerio M. V. ^{[3
]}

Souza, Divanizia N. ^{[3
]}

Caldas, Linda V. E. ^{[1
]}

机构：

[1] IPEN CNEN SP, Comissao Nacl Energia Nucl, Inst Pesquisas Energet & Nucl, BR-05508000 Sao Paulo, Brazil

[2] Minist Trabalho, Fundactr, BR-05422970 Sao Paulo, Brazil

[3] UFS, Dept Fis, BR-49100000 Cristovao, Sergipe, Brazil

来源：

RADIATION MEASUREMENTS | 2014年 / 71卷

基金：

巴西圣保罗研究基金会;

关键词：

Sr-90+Y-90 clinical applicators; Beta dosimetry; Aluminum oxide; Thermoluminescence; Optically stimulated luminescence;

D O I：

10.1016/j.radmeas.2014.03.021

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

International recommendations establish that Sr-90 + Y-90 clinical applicators have to be calibrated in order to determine the absorbed dose rates in the case of the sources that do not have original calibration certificates, or to update the absorbed dose rates presented in the source certificates. Following these recommendations, a postal dosimetric system was developed to calibrate clinical applicators using two luminescent techniques: thermoluminescence (n) and optically stimulated luminescence (OSL). In this work, Al2O3:C commercial detectors were characterized and their TL and OSL responses were analyzed. The results showed the efficiency and the optimal behavior of this material in beta radiation beams. After characterization, the system was sent to the Federal University of Sergipe (UFS), Brazil, for calibration of five Sr-90 + Y-90 clinical applicators, where the detectors were irradiated and returned to IPEN, for their evaluation and determination of the absorbed dose rates. A comparison between these absorbed dose rates and those adopted by the UFS as original was made; the differences obtained were within those of other studies, and they demonstrated the usefulness of the system. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：305 / 309

页数：5