Characterization of chemical and optical modifications induced by 22.5 MeV proton beams in CR-39 detectors
Characterization of chemical and optical modifications induced by 22.5 MeV proton beams in CR-39 detectors
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DOI：
10.1016/s1350-4487(03)00211-7
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发表时间：
2003-09-01
影响因子：
2
通讯作者：
Allab, M
中科院分区：
文献类型：
--
作者：
Lounis-Mokrani, Z;Fromm, M;Allab, M
研究了22.5 MeV质子减速进入4.4 mm聚烯丙基二甘醇碳酸酯（CR-39）堆引起的化学和光学修饰，该堆由16个不同厚度的探测器组成。在真空室中垂直于堆表面进行辐照，质子注量范围为10（11）至10（14）个粒子/cm（2）。这些转换进行了分析，使用傅立叶变换红外（FTIR）吸收光谱的总衰减反射模式和紫外-可见光谱以下的C=O，C=C和O-H带的演变，并通过以下的吸收边缘向更高的波长的位移。CR-39吸收光谱（FTIR和UV）中发生的化学变化与离子束注量，束穿透深度到堆栈和平均沉积的能量密度进行了分析。结果表明，CR-39的降解在3500和4000 μ m之间的深度范围内呈现最大值。(C)2003 Elsevier Ltd.保留所有权利。
Chemical and optical modifications induced by 22.5 MeV protons slowed down into a 4.4 mm polyallyl diglycol carbonate (CR-39) stack, which was composed of 16 detectors of different thicknesses, are studied. Irradiation was performed perpendicular to the stack surface, in a vacuum chamber, with proton fluences ranging from 10(11) to 10(14) particles/cm(2). These transformations are analyzed using fourier transform infrared (FTIR) absorption spectroscopy in the total attenuation reflection mode and UV-visible spectroscopy by following C=O, C=C and O-H bands evolution and by following the shift in the absorption edge towards the higher wavelengths. The chemical changes occurring in the CR-39 absorption spectra (both FTIR and UV) are analyzed versus the ion beam fluence, the beam penetration depth into the stack and the average deposited energy density. The results show that degradation of CR-39 presents a maximum in the depths ranging between 3500 and 4000 mum. (C) 2003 Elsevier Ltd. All rights reserved.