Characterisation of proton irradiated CR-39 detector using positron annihilation lifetime spectroscopy

被引：3
|
作者：
Lounis-Mokrani, Z. [1 ]
Guittoum, A. [1 ]
Imatoukene, D. [1 ]
Aitziane, M. [1 ]
Badreddine, A. [1 ]
Mebhah, M. [1 ]
机构：
[1] Nucl Res Ctr Algiers, Algiers, Algeria
来源：
RADIATION MEASUREMENTS | 2013年 / 50卷
关键词：
Proton; CR-39; SOBP; Free volume; PALS; RELATIVE BIOLOGICAL EFFECTIVENESS; FREE-VOLUME; CROSS-LINKING; BEAM; DISTRIBUTIONS; TEMPERATURE; SIZE; V79;
D O I：
10.1016/j.radmeas.2012.10.007
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：
The damaged produced by proton beam slowed down in CR-39 polymer results in highest degree of disorder with change of free volume proprieties. Positron annihilation lifetime spectroscopy (PALS) is nowadays well recognized as powerful tool of microstructure investigations. PALS is used in order to get more information at an atomic scale of modifications induced by irradiation of polymers particularly the variation of free volume in the irradiated region. In this paper, the mean free volume hole radii and average free volume of the micro-voids in CR-39 polymer irradiated with 200 MeV therapy proton beam at different positions in spread out Bragg Peak region (SOBP) at Ithemba proton therapy facility have been determined using PALS. (c) 2006 Elsevier Ltd. All rights reserved. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：26 / 30
页数：5
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