About VEHANEN A
About Helsinki Univ. Technology, Espoo, FIN
About Hyperfine Interactions
About positron beam
About Interactions with electrons and positrons in general
About Experimental techniques of observation of lattice defects
About 固体表面
About 近傍
About 点欠陥
About 分布
About 研究
About 低速陽電子ビーム
About 応用