In the preceding paper, experimental evidence for five rotational bands in the deformed nucleus ${}_{39}{}^{99}{}_{}{}^{}\mathrm{Y}_{60}^{}{}_{}{}^{}$ was presented and discussed qualitatively. In the present paper, a quantitative analysis of these bands using the particle-rotor model is presented. One-quasiparticle calculations of level energies, single-particle E1 and M1 transitions, and collective E2 transitions provide an excellent description of the level structures and transition rates for the (5/2)[422], (5/2)[303], (3/2)[301], and (1/2)[431] bands in ${}_{}{}^{99}{}_{}{}^{}\mathrm{Y}$ and the (5/2)[422], (5/2)[303], and (3/2)[301] bands in ${}_{}{}^{103}{}_{}{}^{}\mathrm{Nb}$. The Coriolis interaction is shown to be crucial in obtaining the level energy and transition patterns of these bands. The only feature which cannot be explained by the one-quasiparticle calculations is the E1 strength from the (3/2)[431] band in ${}_{}{}^{99}{}_{}{}^{}\mathrm{Y}$.

• Received 16 July 1984

DOI:https://doi.org/10.1103/PhysRevC.31.634