Gallo S, Panzeca S, Longo A, Altieri S, Bentivoglio A, Dondi D, Marconi R P, Protti N, Zeffiro A, Marrale M
Dipartimento di Fisica e Chimica (DiFC), Università di Palermo, V.le delle Scienze, Ed.18, I-90128 Palermo, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Catania, Via Santa Sofia, 64, I-95123 Catania, Italy; PH3DRA Laboratories (PHysics for Dating Diagnostic Dosimetry Research and Applications), Dipartimento di Fisica e Astronomia, Università di Catania Via Santa Sofia 64, I-95123 Catania, Italy.
Dipartimento di Fisica e Chimica (DiFC), Università di Palermo, V.le delle Scienze, Ed.18, I-90128 Palermo, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Catania, Via Santa Sofia, 64, I-95123 Catania, Italy.
Appl Radiat Isot. 2015 Dec;106:129-33. doi: 10.1016/j.apradiso.2015.07.043. Epub 2015 Jul 29.
This paper reports the preliminary results obtained by Electron Paramagnetic Resonance (EPR) measurements on films of IRGANOX® 1076 phenols with and without low content (5% by weight) of gadolinium oxide (Gd2O3) exposed in the thermal column of the Triga Mark II reactor of LENA (Laboratorio Energia Nucleare Applicata) of Pavia (Italy). Thanks to their size, the phenolic films here presented are good devices for the dosimetry of beams with high dose gradient and which require accurate knowledge of the precise dose delivered. The dependence of EPR signal as function of neutron dose was investigated in the fluence range between 10(11) cm(-2) and 10(14) cm(-2). Linearity of EPR response was found and the signal was compared with that of commercial alanine films. Our analysis showed that gadolinium oxide (5% by weight) can enhance the thermal neutron sensitivity more than 18 times. Irradiated dosimetric films of phenolic compound exhibited EPR signal fading of about 4% after 10 days from irradiation.
本文报道了对含有和不含低含量（5%重量）氧化钆（Gd2O3）的IRGANOX® 1076酚类薄膜进行电子顺磁共振（EPR）测量所获得的初步结果。这些薄膜暴露于意大利帕维亚的LENA（应用核能实验室）的Triga Mark II反应堆的热柱中。由于其尺寸，这里呈现的酚类薄膜是用于高剂量梯度束流剂量测定的良好器件，并且需要精确了解所传递的精确剂量。在10(11) cm(-2)至10(14) cm(-2)的注量范围内研究了EPR信号作为中子剂量函数的依赖性。发现了EPR响应的线性，并将该信号与商业丙氨酸薄膜的信号进行了比较。我们的分析表明，氧化钆（5%重量）可将热中子灵敏度提高18倍以上。酚类化合物的辐照剂量测定薄膜在辐照10天后表现出约4%的EPR信号衰减。
