[en] In this mass region, both protons and neutrons can occupy the unique-parity h_11/2 intruder orbitals which play an important role in driving the nuclear shape. The proton Fermi surface lies in the lower part of the h_11/2 subshell, which favors prolate shape, whereas the neutron Fermi surface lies in the middle or upper part of the h_11/2 subshell, which favors oblate shape. Thus, a coexistence of different shapes is expected in these nuclei because of opposite shape-driving forces of protons and neutrons in h_11/2 orbitals. The nuclear electromagnetic moment measurements are crucial to give unambiguous information about the configuration and the shape of the nucleus. Two isomeric band heads are observed in ¹²⁹Ba i.e., I = 9/2^- (T_1/2 = 18ns) and I = 23/2⁺ (T_1/2 = 63ns). Both the rotational bands belong to high-j neutron configuration having different deformation driving forces