00295    a2200097   4500082001500000100003700015245004100052260005700093300001600150650003100166  a539.7bOPE  aThe Open university of Sri Lanka  aPhysicsbnuclear physics b block 3B  aNawalabThe Open University of Sri Lankac1990g1990  a171p.c28cm  aAtomic and nuclear physics