Ba145 β− decay: Excited states and half-lives in neutron-rich La145

Abstract

Low-spin excited states in 145 La have been investigated from the 145 Ba β − decay. The 145 Ba nuclei were directly produced by photofission in the ALTO facility or obtained from the β − decay of 145 Cs also produced by photofission. A new level scheme is proposed including 67 excited levels up to 3 MeV and 164 transitions. Half-lives in the few ns range were measured for the first excited states. Configurations for levels up to ≈ 600 keV are proposed.

$^{145}$Ba and $^{145, 146}$La structure from lifetime measurements

“…Note added in Proof. Recently, the authors were made aware of a recent publication [54] reporting the measurement of several lifetimes in 145 La. There is perfect agree-ment between the results of both experiments, which is a strong confirmation of the present results.…”