LA-128,LA-130,LA-132,LA-134 IN THE AXIALLY-SYMMETRICAL ROTOR MODEL

Recent experimental data on positive-parity yrast states, based on the pi h(11/2)x nu h(11/2) configuration, of odd-odd La-128,La-130,La-132 ,La-134 are compared in a systematic way with the energies and transit ion probabilities calculated within the framework of the two quasipart icle, axially symmetric core model. It is found that very good agreeme nt is obtained in La-128,La-130 assuming prolate deformation. Influenc e of the neutron Fermi level on the level properties in these two nucl ei has also been studied. In the case of La-132,La-134, this model see ms to indicate that this positive-parity yrast band may have an oblate deformation.