A new ESR dosimeter based on bioglass material

被引：16

作者：

Hassan, GM

Sharaf, MA

Desouky, OS

机构：

[1] NIS, Dept Ionizing Radiat Metrol, Cairo 136, Egypt

[2] NCRRT, Cairo, Egypt

来源：

RADIATION MEASUREMENTS | 2004年 / 38卷 / 03期

关键词：

ESR; radiation; dosimetry; Bio-G;

D O I：

10.1016/j.radmeas.2004.01.020

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：

Bioglass (Bio-G) samples were irradiated with Co-60 gamma-rays to study radicals for dosimetric materials with electron spin resonance (ESR). The ESR spectrum of Bio-G is characterized by two main signals. The first signal at g congruent to 4.3 corresponds to Fe3- impurities and the second signal at g congruent to 2.0130 with line-width 10.85 G is ascribed as a hole center. The gamma-ray dose response and thermal stability were studied to establish the suitability of bioglass as an ESR dosimeter. A radical formation efficiency, G-value. of 0.53 +/- 0.11 was obtained. The lifetime of radicals and the activation energy were estimated from Arrhenius plots to be approximately 255 +/- 46 days and 0.71 eV, respectively. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：311 / 315

页数：5

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