COLLECTIVE BANDS IN ⁶⁸Se

The collective bands of the N = Z nucleus ⁶⁸Se are studied within our deformed configuration mixing shell model based on Hartree–Fock states. The configuration space consists of the spherical single particle orbits 1p_3/2, 0f_5/2, 1p_1/2 and 0g_9/2 with ⁵⁶Ni as the inert core. A modified Kuo interaction for this basis space has been used in our calculation. The calculated ground band, K = 2⁺ excited band and the K = 5^- excited band agree reasonably well with the experiment. Our calculation shows that the ground band is essentially of oblate shape and the excited K = 2⁺ band is of prolate shape. This is in agreement with the conclusions drawn from the recent experimental analysis.