Positron implantation and transmission ezperiments on free-standing nanometric polymer films

摘要：

Positron transmission experiments were performed on free-standing poly(methylmethacrylate) (PMMA) and polystyrene (PS) films of nanometric thicknesses made by spin coating. The power_law equation z1/2(E) )=(α/ρ)En was determined from the measurements of the Sparameter as a function of the positron implantation energy. These transmission experiments indicate that n=1.90(±0.08) and α=1.33(±0.10) μg cm-2 which deviates from the values found by Algers et al. (n=1.71(±0.05) and α=2.8(±0.2) μg cm-2) and the commonly used parameters (n=1.6 and α=4.0 μg cm-2).

关键词： Thin films nanometric polymer poly(methyl-methacrylate) polystyrene positron beam

作者: C.A.Palacio J.De Baerdemaeker D.Segers K.M.Mostafa D.Van Thourhout C.Dauwe

作者单位: Department of Subatomic and radiation Physics,Ghent University,Proeftuinstraat 86,B-9000 Ghent,Belgi Department of Subatomic and radiation Physics,Ghent University,Proeftuinstraat 86,B-9000 Ghent,Belgi Department of Subatomic and radiation Physics,Ghent University,Proeftuinstraat 86,B-9000Ghent,Belgiu Department of Information Technology,Ghent University,St.Pietersniewstraat 41,B-9000 Gent,Belgium

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 105-107

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）