Yrast-yrare interaction strength and bandcrossing frequency

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.44.2566· OSTI ID:5082838

Wu, C S; Zeng, J Y ^[1]

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1. China Center of Advanced Science and Technology (World Laboratory), Center of Theoretical Physics, P.O. Box 8730, Beijing 100080 (China) Department of Physics, Peking University, Beijing 100871 (China) Institute of Theoretical Physics, Chinese Academy of Science, Beijing 100080 (China)

Accurate particle-number-conserving calculation shows that in a single-{ital j} model the yrast-yrare interaction {ital V} is always strong and no periodic oscillation of {ital V} with the degree of shell filling is found, in contrast to the results obtained by the Hartree-Fock-Bogoliubov approximation. To understand the behavior of {ital V} and bandcrossing frequency {omega}{sub {ital c}}, the spin-alignment, seniority structure, configuration structure, and quasiparticle structure'' of the yrast and yrare bands are analyzed in detail. Calculation in a two-{ital j} model (high-{ital j} intruder orbits plus normal orbits of opposite parity) was also carried out to illustrate schematically that a weak yrast-yrare interaction may occur for certain single-particle level scheme. The coexistence of normal low-{ital j} orbits with high-{ital j} intruder orbits is indispensible for a sharp backbending observed in some realistic nuclei.

• OSTI ID: 5082838
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 44:6; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

663120* -- Nuclear Structure Models & Methods-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BACKBENDING
CRANKING MODEL
ENERGY LEVELS
HAMILTONIANS
HARTREE-FOCK-BOGOLYUBOV THEORY
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
NUCLEAR MODELS
QUANTUM NUMBERS
QUANTUM OPERATORS
SENIORITY NUMBER
SHELL MODELS
YRAST STATES