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Report No.

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 $$56 leq A leq 238$$ 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 $$B(E2)$$ and $$B(E3)$$ 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.



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