Study of the response of phenol compounds exposed to thermal neutrons beams for Electron Paramagnetic Resonance dosimetry

被引：19
|
作者：
Marrale, M. [1 ,2 ]
Gallo, S. [1 ,2 ,3 ]
Longo, A. [1 ,2 ]
Panzeca, S. [1 ]
Parlato, A. [4 ]
Buttafava, A. [5 ,6 ]
Dondi, D. [5 ,6 ]
Zeffiro, A. [5 ,6 ]
机构：
[1] Univ Palermo, Dipartimento Fis & Chim DiFC, I-90128 Palermo, Italy
[2] INFN, Grp Sez 5, I-95123 Catania, Italy
[3] Univ Catania, Dipartimento Fis & Astron, Labs PH3DRA, I-95123 Catania, Italy
[4] Univ Palermo, Dipartimento Energia Ingn Informaz & Modelli Mate, I-90128 Palermo, Italy
[5] Univ Pavia, Dipartimento Chim, I-27100 Pavia, Italy
[6] Ist Nazl Fis Nucl, Grp Sez 5, Sez Pavia, I-27100 Pavia, Italy
来源：
RADIATION MEASUREMENTS | 2015年 / 75卷
关键词：
Electron Paramagnetic Resonance; NCT dosimetry; Phenols; Neutron beam; Gadolinium; LOW GD CONTENT; EPR DOSIMETRY; ESR RESPONSE; TOOTH ENAMEL; AMMONIUM-TARTRATE; CAPTURE THERAPY; DOSE-RESPONSE; WATCH GLASSES; GADOLINIUM; SENSITIVITY;
D O I：
10.1016/j.radmeas.2015.02.019
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：
This paper reports the results regarding a new organic compound (IRGANOX (R) 1076 phenols) with and without tow content (5% by weight) of gadolinium oxide (Gd2O3) for Electron Paramagnetic Resonance (EPR) dosimetry of neutron beams. The dependence of EPR signal as function of neutron dose was investigated in the fluence range studied between 10(11) cm(-2) to 10(14) cm(-2). We evaluated also the effect of gadolinium on Co-60 gamma photon sensitivity of this organic compound. Our analysis showed that a low concentration of gadolinium oxide (of the order of 5% of the total mass of the dosimeter) can enhance the thermal neutron sensitivity more than 10 times with a small reduction of photon tissue equivalence. The free radicals produced after irradiation of photons and neutrons are stable for more than first 300 h after irradiation. The presence of additives does not substantially modify the fading of the EPR signal induced by photons and neutrons in the first 15 days after exposure. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：15 / 20
页数：6
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