Extensive study of the soft-rotator model Hamiltonian parameters for medium and heavy even-even nuclei

Kunieda, Satoshi  ; Chiba, Satoshi; Shibata, Keiichi; Ichihara, Akira ; Iwamoto, Osamu  ; Iwamoto, Nobuyuki  ; Fukahori, Tokio  ; Sukhovitskij, E.*

The soft-rotator model Hamiltonian parameters were deduced for 63 even-even nuclei in a mass range by a combination of the low-lying level structure and the coupled-channels proton scattering analyses toward a systematic and accurate calculation of nuclear data. It was found that obtained effective quadrupole and octupole deformation parameters were consistent with those derived from experimental and data. Besides, the equilibrium ground-state quadrupole deformation parameters were also in reasonable accord with theoretical results for deformed heavy nuclei. The obtained parameters often varied with the neutron and/or proton numbers anomalously, showing mostly effects of the shell closure. On the other hand, some clear systematic trends were seen among the major Hamiltonian parameters.