[en] High-spin states in the odd-odd ¹³⁸Pr nucleus were reinvestigated with the reaction ¹²⁸Te(¹⁴N,4n) at a beam energy of 64 MeV. Six collective bands were observed, and two of them were newly identified. For the πh_11/2xνh_11/2 band, high-spin states are followed up to I^π=16⁺. The spin values for this band have been reassigned based on the systematical comparison with the neighboring nuclei. The observed band crossing is proposed to be due to the alignment of protons, and the signature inversion with the neutron number changing in La and Pr isotopes has been discussed. The other five collective bands are proposed to be based on oblate deformation with γ∼-60 deg

[en] High spin states in 136,137La and 148Ce nuclei have been investigated. The new level schemes for these nuclei have been established. In 136La, observed band crossing as well as the signature splitting and inversion in πh11/2(multiply-in-circle sign)νh11/2 band has been discussed. Other two bands were proposed as oblate deformation with γ ∼ -60 deg. In 137La, several new bands have been established. The band crossing and oblate deformation have been discussed. In 148Ce, the double octupole deformation bands with s = +1 and s = -1 have been proposed