Rotational inertia of superdeformed nuclei: Intruder orbitals, pairing, and identical bands

Journal Article · Fri Mar 01 00:00:00 EST 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.53.R1070· OSTI ID:279154

de France, G; Baktash, C; Haas, B; Nazarewicz, W ^[1]

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1. Centre de Recherches Nucleaires, IN2P3-CNRS/Universite Louis Pasteur, F-67037 Strasbourg Cedex (France)

The phenomenon of identical bands is studied by analyzing the distributions of fractional changes in the dynamical moments of inertia of pairs of bands in superdeformed (SD) nuclei. These distributions are found to exhibit a peak with a centroid at nearly zero. Their widths increase in going from the SD bands in the mass {ital A}{approximately}150, to the SD bands in the mass {approximately}190, and to the normally deformed bands in the rare-earth region. Consequently, there exists a significant excess of identical bands in SD nuclei compared to the normally-deformed nuclei at low spins. This difference may be attributed to the weaker pairing correlations and the stabilizing role of intruder orbitals on the structures of SD bands. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400; FG05-93ER40770
• OSTI ID: 279154
• Journal Information: Physical Review, C, Vol. 53, Issue 3; Other Information: PBD: Mar 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
SUPERDEFORMED NUCLEI
MOMENT OF INERTIA
CORRELATIONS
DISTRIBUTION
PAIRING INTERACTIONS
RARE EARTH ISOTOPES
SPIN
STABILIZATION
WIDTH