Structure analysis of 159Sm and properties of odd-mass neutron-rich nuclei in mass-160 region

Recent fission experiment data provide interesting structure information for neutron-rich nuclei in the mass A similar to 60 region. We apply the projected shell model to study the strongly-deformed, neutron-rich Sm isotopes. We perform calculations for rotational bands up to spin I = 20 (29/2) for even-even (odd-neutron) Sm isotopes, and analyze the band structure of low-lying states with quasiparticle excitations. Emphasis is given to rotational bands based on one-quasiparticle (1-qp) configurations in the odd-mass Sm-159. The Sm-159 result is discussed together with those of the even-even isotopes Sm-158,Sm-160. New bands in Sm-159 based on neutron 1-qp 1/2(-) and 5/2(+) configurations are predicted. Electromagnetic transition probabilities are discussed.