Prospects for Laser Spectroscopy of Ps2

摘要：

Recent observations of molecular positronium (Ps2) were based on a correlation between changes in positronium (Ps) lifetime spectra associated with the density of an incident positron beam and the population of a positronium (or positron) surface state. While the evidence for molecule formation is compelling it is nevertheless an indirect observation, and has not provided any information about the properties of Ps2 beyond its likely creation. Here we discuss the prospects for a direct observation via laser spectroscopy of a predicted 1S2P excited molecular state. Such a measurement would provide a direct and unambiguous signal of Ps2 formation and would also allow us to determine some properties of the molecule, namely the lifetime of the excited state and the 1S1S-1S2P energy interval.

关键词： Positronium Positronium molecule Ps2 positron accumulator laser spectroscopy

作者: D.B.Cassidy S.H.M.Deng R.G.Greaves N.Lopez-Valdez V.Meligne H.W.K.Tom A.P.Mills,Jr

作者单位: Department of Physics and Astronomy,University of California,Riverside,CA 92521-0413,USA First Point Scientific,Inc.,Agoura Hills,CA,USA

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: 17-21

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）