Electroexcitation of Giant Resonances between 5 MeV and 40 MeV Excitation Energy in 197 Au

摘要

Inelastic electron scattering from 197Au 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 (EO), 10.8 (E2), 14.0 (E1), 18.0 (undetermined), 22.5 (E2), and 33.5 MeV (EO or E2). (Author)