Electroexcitation of giant resonances between 5 MeV and 40 MeV excitation energy in 197 Au

Abstract

Inelastic scattering from(197)Au between 5 MeV and 40 MeV excitation energy revealed giant multipole resonances. Angular distribution studies with incident 90 MeV electrons show evidence of previously unreported giant monopole states. Reduced matrix elements have been extracted and multipolarity assignments have been made. Seven states have been observed at excitations of 7.3 (undetermined magnetic), 9.2 (E0), 10.8 (E2) , 14.0 (E1), 18.o (undetermined), 22.5 (E2), and 33.5 MeV (E0 or E2).