Pore-size distributions in natural minerals

摘要：

Positron lifetime spectroscopy was conducted for a number of natural minerals to investigate open-nano pores. Similarly to the cases of polymers and glasses, positronium (Ps) formation occurs with ortho-positronium (o-Ps) intensity of a few％ to 20％. Size distributions of nano pores were evaluated based on o-Ps lifetimes. Size distributions were found to be strongly depend on their environmental history of formation. For example, sedimentary rock such as chert contain less nano pores than volcanic glasses formed by quenching. The results will be discussed with respect to formation processes of nano pores influenced by earths environment.

作者: K.Yoshizawa K.Sato H.Murakami N.Shikazono K.Fujimoto M.Nakata

作者单位: Department of Astronomy and Earth Sciences,Tokyo Gakugei University,Koganei,Tokyo 184-8501,Japan Department of Astronomy and Earth Sciences / Environmental Sciences,Tokyo Gakugei University,Koganei Department of Applied Chemistry,Keio University,Hiyoshi,Yokohama 223-8522,Japan

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: 103

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）