Momentum distributions of ortho-positronium dependent on electronic state at free volume walls in insulators

摘要：

Age-momentum correlation (AMOC) spectroscopy, which can sensitively probe momentum distributions of positrons and positronium (Ps), was conducted for studying the pick-off process of the triplet bound state ortho-Ps (o-Ps) with electrons at the walls of the free volume holes. Influences of different chemical elements forming free volume and the size of the free volume are investigated. It is found that the momentum distribution of o-Ps pick off annihilation sensitively depends on the electronic state. The feasibility of the chemical analysis relevant to the free volume in insulating materials is discussed.

关键词： Age-momentum correlation spectroscopy polymer glass positronium

作者: K.Sato H.Murakami K.Ito K.Hirata Y.Kobayashi

作者单位: Department of Environmental Sciences,Tokyo Gakugei University,Koganei,Tokyo 184-8501,Japan National Institute of Advanced Industrial Science and Technology (AIST),Tsukuba,Ibaraki 305-8565,Jap

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: 53-57

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）