High spin-states and shape driving effects in A=130 nuclear region

Through 122Sn(16O, 4n), 130Te(11B, 5n) and 107Ag(19F, 1p3n) heavy-ion nuclear reactions and in-beam γ-ray spectroscopy technique, high spin states of 134Ce, 136La and 122Cs have been studied. The previous level schemes have been extended. The observed results show that the collective band structures in these three nuclear were affected by the shape-driving effects. The shape coexistence with different γ deformations has been observed in 134Ce. In 136La, the πh11/2 direct x νh11/2 band was updated and its character has been discussed while two oblate bands with γ--60 degree have been established. In 122Cs chiral doublet bands were proposed. The magnetic rotational bands reported in a recent paper in 134Ce were not confirmed by our experiment. (authors)