Level structures in 180Hf from the β decay of 180Lu

Abstract

Configuration assignments to the levels of 180Hf populated in the β decay of the 5.7 min ground state of 180Lu are derived based on the observed β-transition rates, calculated two-quasiparticle excitation energies, and the observed decay modes of the levels under consideration. Corroborative evidence is sought from the results of the other experimental investigations including (n, γ), (n, 2γ), (n, n′γ), and particle transfer reaction studies. Specifically the 1607.7 and 1742.7 keV levels are assigned the IπK = 4+4 and 5+4 {7/2[514] + 1/2[510]} two-neutron configuration, and the 1374.7 and 1609.7 keV levels are assigned the 4−4 and 5−5 {9/2[624] + 1/2[510]} two-neutron configuration.