Spontaneous Emission of Positronium Negative Ionsfrom Crystalline Tungsten Surfaces

摘要：

Positronium negative ion (Ps-), a bound state of a positron and two electrons, is a pure leptonic system. The existence of Ps-was confirmed experimentally by Mills 1 in 1981 using the beam foil method. After the discovery, the method has been employed to measure the Ps-decay rate 2, 3. Recently, we have observed Ps-formed by a new mechanism, spontaneous emission from polycrystalline tungsten surface 4-6. In the present study, we have extended the study to the emission from tungsten single crystals.

作者: Y.Nagashima T.Hakodate A.Miyamoto K.Michishio

作者单位: Department of Physics,Tokyo University of Science,1-3 Kagurazaka,Shinjuku-ku,Tokyo 162-8601,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: 34

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）