Half-Lives of Low-Lying Isomeric States in 169Ta
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Abstract
Two low-lying isomeric states in 169Ta have been identified via 159Tb(l6O, 6n γ )169Ta reaction. Their half-lives are measured to be 28 ± 5ns for the 9/2- level and 17 ± 4 ns for the 5/2- level by using the delayed γ-γ coincidence method. These two isomeric states are considered to be the bandheads with 9/2-514 and 1/2-541 configurations, respectively. Possible neutron quasiparticle configuration for the ground state of 169W is discussed.
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