G.L.Struble1,L.G.Mann1,R.G.Lanier1,W.M.Buckley1, J.Kern1,2,G.Crawley3,S.Gales3,D.Mueller4,F.Girshick4 Lawrence Livermore National Laboratory, Livermore, CA1 Univ. of Fribourg2 Michigan State University, East Lansing, MI3 Princeton University, Princeton, NJ4
Physics Letters,Section B93(1980)26