Positronium thermalization process in nanoporous materials and its influence on the shape of PALS spectrum

摘要：

A new method of analysis of PALS spectra of porous materials is proposed. The model considers both the thermalization process of positronium inside the pores and the pore size distribution. The new model is fitted to spectra of mesoporous silica MCM-41 and MSF. The resulting parameters are compared with parameters obtained from fitting the “conventional models, i.e. a sum of exponential components with discrete or/and distributed lifetimes.

关键词： positron annihilation nanoporous materials porosimetry PALS spectrum

作者: Jerzy Kansy Radoslaw Zaleski

作者单位: Institute of Materials Science,University of Silesia,Bankowa 12,40-007 Katowice,Poland Institute of Physics,Maria Curie-Sk(I)dowska University,pl.Marii Curie-Sk(I)dowskiej 1,20-031 Lublin

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: 39-41

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）