The parities of levels excited by resonance scattering of γ rays from neutron capture in iron were measured with a Compton polarimeter. The spins and parities of resonance levels in four isotopes were thus found to be 208Pb (7.279 MeV, 1-), 112Cd (7.632 MeV, 1-), 141Pr (7.632 MeV, 7 2-) and 62Ni (7.646 MeV, 1-), which correspond to E1, M1, E1 and M1 radiation, respectively. These results disagree with Axel's suggestion that these resonances may be associated with the tail of the electric giant dipole resonance.
ASJC Scopus subject areas
- Nuclear and High Energy Physics