Investigation of free radicals induced by light ions in CR-39 using ESR spectroscopy

被引：4
|
作者：
Böhlke, S
Hermsdorf, D [1 ]
Sichelschmidt, J
Starke, S
机构：
[1] Dresden Univ Technol, Inst Nucl & Particle Phys, Dept Phys, D-01062 Dresden, Germany
[2] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany
来源：
RADIATION MEASUREMENTS | 2005年 / 40卷 / 2-6期
关键词：
light ions; irradiation; CR-39; polymer; radiation damage; ESR spectroscopy;
D O I：
10.1016/j.radmeas.2005.03.019
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：
In previous investigations the formation of radicals induced by gamma-irradiation in CR-39 samples has been studied by electron spin resonance (ESR) spectroscopy. On the other hand, all attempts fail to detect radicals in samples irradiated by particles (p, alpha and neutrons). The present work succeeded in detection of radicals produced by charged particle radiation in CR-39 (TASTRAK). The detectors were irradiated with protons of 7 MeV and alpha-particles of 3 MeV with fluences in the order of 10(11)-10(12)particles/cm(2). The observed ESR signal is composed of at least four different resonance lines for each of which we determined the amplitudes, g-factors, lifetimes and the G-value. The amplitude of the total ESR signal decreases rapidly with a short and a longer lifetime. About 5 days after irradiation the ESR intensity decreased to an undetectable value. The lowest detectable dose (LDD) is of the order of 1 kGy. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：218 / 223
页数：6
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