A new parallel-plate graphite ionization chamber as a 60Co gamma radiation reference instrument

被引：8

作者：

Perini, Ana P. ^{[1
]}

Neves, Lucio P. ^{[1
]}

Fernandez-Varea, Jose M. ^{[2
,3
]}

Cassola, Vagner F. ^{[4
]}

Kramer, Richard ^{[4
]}

Khoury, Helen J. ^{[4
]}

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

机构：

[1] Comissao Nacl Energia Nucl IPEN CNEN SP, Inst Pesquisas Energet & Nucl, BR-05508000 Rio De Janeiro, SP, Brazil

[2] Univ Barcelona, Fac Fis, ECM, E-08028 Barcelona, Spain

[3] Univ Barcelona, Fac Fis, ICC, E-08028 Barcelona, Spain

[4] Univ Fed Pernambuco, Dept Energia Nucl, BR-50740540 Recife, PE, Brazil

来源：

RADIATION PHYSICS AND CHEMISTRY | 2014年 / 95卷

基金：

巴西圣保罗研究基金会;

关键词：

Graphite ionization chamber; Reference system; Gamma radiation; Monte Carlo simulation; AIR-KERMA; STANDARD;

D O I：

10.1016/j.radphyschem.2013.01.005

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：

The calibration procedure in radiotherapy treatments is very important and a sensitive task due to the high doses delivered to the patients. Generally, the air-kerma cavity standards for Co-60 gamma rays are graphite cavity ionization chambers. In this work a new parallel-plate graphite ionization chamber was studied to analyze its potential use as a reference instrument. In order to evaluate its performance in Co-60 beams, it was submitted to several characterization tests. Moreover, Monte Carlo simulations were undertaken using the EGSnrc code to study the influence of the chamber components on its response. The results obtained showed that this new ionization chamber presented a satisfactory performance in all evaluated tests. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：106 / 108

页数：3

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