In-beam study of the odd-odd nuclei 134La and 136La

Abstract The level schemes of the nuclei 134,136 La have been studied by means of in-beam γ-ray spectroscopic methods following the (α, 3n) and (p, 3n) reactions. New isomers with half-lives of 29 ± 5 μ s and 17 ± 4 ns have been discovered in 134 La and 136 La, respectively. Low-lying levels and isomers in 134,136 La have been interpreted as members of multiplets having (π d 5 2 v d 3 2 ), (π d 5 2 v s −1 1 2 ) and (π d 5 2 v h −1 11 2 ) configurations.