Band Structures of the 135La, 133La and 129Cs Nuclei

Band structures of the 135 La, 133 La and 129 Cs nuclei have been studied by means of in-beam γ-ray spectroscopy following the (α, 2n) and ( 3 He, 3n) reactions. The 11/2 - decoupled bands and positive-parity bands built on the 5/2 + and 7/2 + states have been observed. A new isomeric state of 129 Cs with a half-life of 0.69±0.03 µsec has been discovered.