Diabatic Mean-Field Description of Rotational Bands in Terms of the Selfconsistent Collective Coordinate Method

Abstract

Diabatic description of rotational bands provides a clear-cut picture for understanding the back-bending phenomena, where the internal structure of the yrast band changes dramatically as a function of angular momentum. A microscopic framework to obtain the diabatic bands within the mean-field approximation is presented by making use of the selfconsistent collective coordinate method. Applying the framework, both the ground state rotational bands and the Stockholm bands are studied systematically for the rare-earth deformed nuclei. An overall agreement has been achieved between the calculated and observed rotational spectra. It is also shown that the inclusion of the double-stretched quadrupole-pairing interaction is crucial to obtain an overall agreement for the even-odd mass differences and the rotational spectra simultaneously.

43 pages including 15 PS figures, to appear in Progress of Theoretical Physics Supplement ``Selected Topics in Boson Mapping and Time-Dependent Hartree-Fock Methods.'' The full version of this paper is available at http://www.nt.phys.kyushu-u.ac.jp/shimizu/download/download.html and http://pearl.scphys.kyoto-u.ac.jp/~ken/paper.html

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