Three Methods of Positr Annihilation Birth y-ray 1.27 MeV △t 1.Positron lifetime 2.Angular correlation Sample Px.y x.V moc positron source ● 22-Na diffusion (100 nm) 100μm Thermalization (1ps) 3.Doppler broadening 0.511MeV±AE,AE=Pzc2 PDF文件使用"pdfFactory”试用版本创建iw.fineprint.cnThree Methods of Positron Annihilation PDF 文件使用 "pdfFactory" 试用版本创建 ÿwww.fineprint.cn ÿ