Fragmentation of single-particle states and neutron strength functions in deformed nuclei

Abstract

The fragmentation of single-particle states and the neutron strength functions in odd-N deformed nuclei are studied in the framework of a model based on the quasi-particle-phonon interaction. The dependence of the fragmentation on the positions of the single-particle levels with respect to the Fermi level is studied. It is shown that in the distribution of the single-particle strength, alongside a large maximum there appear local maxima, and the distribution itself has a long tail towards high excitation energies. The averaged neutron strength functions are determined without calculating the energies and wave functions of each state. The dependence of neutron strength functions on the excitation energy is investigated for transfer reactions of the type (d, p) and (d, t). The s-, p- and d-wave neutron strength functions are calculated for many deformed nuclei at the neutron binding energy Bn. They are in satisfactory agreement with the corresponding experimental data.