Study of 0~+ Excitations in ~(158)Gd with the (n,n'γ) Reaction

摘要

In recent ~(160)Gd(p,t) reaction studies the existence of more than ten 0~+ states in ~(158)Gd below 3.0 MeV was revealed. We have examined ~(158)Gd with the (n,n'γ) reaction at neutron energies up to 3.5 MeV to confirm the identification of these states and to determine their lifetimes through DSAM measurements. Gamma-ray excitation function and angular distribution measurements have been performed and γ-γ coincidences have been measured with the KEGS array of detectors. Moderately strong decays are observed from some of these 0~+ states.