1−Neutron Particle-Hole States inPb208Populated by Proton Decay of Analog Resonances

Abstract

Gamma rays from the decay of neutron particle-hole states in ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ populated by analog resonances in ${}_{}{}^{209}{}_{}{}^{}\mathrm{Bi}$ have been measured with a Ge(Li) crystal. 12 states are found to have observable ground-state transitions. States at 5.27, 5.50, 5.94, 6.32, 6.49, and 7.09 MeV have been assigned $J^{\pi }=1^{-}$ on the basis of ground-state branching fractions and angular distributions.