摘要
在室温和真空环境下利用不同的快重离子(1.158GeV Fe56、1.755GeV Xe136及2.636GeV U238)对多层堆叠的聚对苯二甲酸乙二醇酯(PET)、聚碳酸脂(PC)和聚酰亚胺(PI)进行了辐照,结合X射线衍射(XRD)、傅立叶红外光谱(FTIR)及紫外可见光谱测量技术,在较宽的电子能损(1.9-19.0 keV·nm-1)和注量范围(1×1010-6×1012 cm-2)研究了离子在不同聚合物潜径迹中引起的损伤过程,观测到了主要官能团的降解、炔基生成、非晶化及紫外吸收边缘的红移等现象随辐照注量及电子能损的变化趋势。通过对损伤过程的定量分析,应用径迹饱和模型假设,分别给出了Fe、Xe和U离子在不同电子能损下辐照PC时的平均非晶化径迹半径和炔基形成半径,并用热峰模型对实验结果进行了检验。
Under the vacuum and room temperature environment, polyethyleneterephthalate （PET）, polycarbonate （PC, Makrofol KG） and polyimide （PI） foil stacks were irradiated with various swift heavy ions （1.158GeV Fe^56, 1.755GeV Xe^136 and 2.636GeV U^238） . The damage processes in the irradiated polymer latent tracks were studied by X-ray diffraction （XRD）, Fourier Transform Infrared （FTIR） spectroscopy and ultraviolet/visible （UV/Vis） spectroscopy in a very wide electronic stopping power range （from 1.9 to 17.1 keV·nm^-1） and fluence range from 1×10^10 to 3×10^12 ions·cm^-2. The degradation of main functional group, alkyne formation, amorphization and red shift of the absorption edge were observed. By quantitatively analyzing the main damages and applying the saturated track model, the mean damage radii of tracks of amorphization and alkyne formation process were obtained for Fe, Xe and U ion irradiation, respectively. The results were explained by the theoretical model.
出处
《核技术》
EI
CAS
CSCD
北大核心
2007年第4期342-346,共5页
Nuclear Techniques
关键词
快重离子
聚合物
潜径迹
损伤效应
Swift heavy ion, Polymer, Latent tracks, Damage effects
