用数字示波器做采集卡 Digital measurement of positron lifetime K.Rytsola,J.Nissila,J.Kokkonen,A.Laakso,R.Aavikko,K.Saarinen Laboratory of Phrysies,Heisinki Universiry of Technology.P.O.Box 1100.FIN-02015 HUT.Espoo.Finland Applied Surface Science 194 (2002)260-263 e e⫼᭄ᄫ⼎⊶఼خ䞛䲚व