关键词: 
聚对苯二甲酸乙二醇酯膜 /
快重离子辐照 /
辐照损伤

摘要: 通过25 MeV/u 86 Kr离子辐照叠层结晶聚对苯二甲酸乙二醇酯膜（PET）， 在不同的电子能损（3.40-7.25 keV/nm）和离子注量(5×10¹¹----3×10¹² ions/cm²)辐照条件下， 对Kr离子在PET中引起的辐照损伤效应进行了研究。借助傅里叶变换红外光谱分析，通过对样品的红外吸收峰进行扣除基底后的Lorentz拟合，分析了与主要官能团对应的吸收峰强度的变化趋势， 研究了化学结构与组分在重离子辐照下的变化规律； 利用X射线衍射光谱仪测量， 研究了Kr离子在PET潜径迹中引起的非晶化过程，并通过对吸光度和非晶化强度随离子注量的指数衰减规律的分析， 获得了不同电子能损离子辐照PET时主要官能团的损伤截面和非晶化截面及对应的潜径迹半径。
At room temperature， polyethylene terephthalate(PET) foil stacks were irradiated by 25 MeV/u Kr ions in the electronic stopping power range(3.3--7.66 keV/nm) and the fluence range from 5×10¹¹ to 3×10¹² ions/cm². The behaviour of the main function groups with fluence and electronic stopping power were studied by using Fouriertransforminfrared(FTIR) spectroscopy， the degradation of the function group was investigated with the Lorentz fitting subtracted baseline. The amorphous processes in the latent tracks of PET were studied by Xray diffraction(XRD) measurements. The Kr ion induced degradation crosssection and amorphisation crosssections(radii) for different electronic energy loss were acquired from the experimental data(FTIR and XRD) by exponential decay function respectively. 