Reduction of light elements loss in polymer foils during MeV-proton irradiation by application of an aluminum coating
Reduction of light elements loss in polymer foils during MeV-proton irradiation by application of an aluminum coating
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DOI：
10.1016/j.nimb.2010.05.008
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发表时间：
2010-10-01
影响因子：
1.3
通讯作者：
Takahiro, K.
中科院分区：
文献类型：
--
作者：
Saito, M.;Nishiyama, F.;Takahiro, K.
用2.2 MeV质子的背向散射和前向散射光谱测定了芳香族聚酰亚胺(PI)、聚邻苯二甲酸乙二醇酯(PET)和聚邻苯二甲酸乙二醇酯(PEN)聚合物膜中的H、C、N和O等轻元素。在PI的情况下，在质子辐照过程中没有观察到H、C、N和O的显著损失。另一方面，在PET和PEN中，所有轻元素都随着辐照剂量的增加而逐渐减少，最终PET中15%-H、14%-C、47%-O和PEN中7%-H、5%-C31%-O的含量最终被释放到2.1×10(16)质子/厘米(2)。为了防止轻元素的释放，在4微米厚的PET和PEN薄膜的上表面溅射沉积了一层铝薄膜(厚度约为0.1微米)。例如，在涂铝的笔箔中，H、C和O的损失分别为起始含量的2%、0.5%和22%，比未涂覆的笔箔的损失要小得多。因此，铝涂层是一种有效的抑制成分损失的方法。(C)2010爱思唯尔B.V.保留所有权利。
Backscattering and forward-scattering spectrometry with 2.2 MeV-protons have been applied to detect light elements including H, C, N and O in polymer foils of aromatic polyimide (PI), polyethylene telephthalate (PET) and polyethylene naphthalate (PEN). In the case of PI, no significant loss of H, C, N and O was observed during proton irradiation. In the case of PET and PEN, on the other hand, all the light elements gradually decreased as irradiation fluence increased and the contents of 15%-H, 14%-C, 47%-O in PET and 7%-H, 5%-C 31%-O in PEN were eventually released up to a fluence of 2.1 x 10(16) protons/cm(2). An aluminum thin film (thickness similar to 0.1 mu m) was sputter-deposited on the upper surface of 4 mu m thick PET and PEN foils to prevent the release of light elements. In Al coated PEN foil, for example, the losses of H, C and O were 2%, 0.5% and 22% of the starting contents, respectively, considerably smaller than those found for uncoated PEN. Thus the Al coating was found to be an effective method to suppress the loss of constituent elements. (C) 2010 Elsevier B.V. All rights reserved.