Two-quasiparticle states in the interacting boson model. II. Electromagnetic properties in the SU(3) limit
Journal Article
·
· Physical Review, C (Nuclear Physics); (United States)
- Department of Physics, Faculty of Science, University of Zagreb, 41000 Zagreb, Republic of Croatia, Yugoslavia (YU)
- Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Bologna, (Italy) Department of Physics A. Righi'', Via Irnerio 46, Bologna, (Italy)
The interacting boson approximation model, extended by allowing one boson to break and form a quasiparticle pair, is investigated in the SU(3) limit. Electromagnetic properties of yrast states are studied for the algebraic analogs of both the decoupling and strong-coupling limits. The effects of a pair-breaking interaction that mixes states with different numbers of quasiparticles are investigated for {ital E}2 transitions between yrast states. For the algebraic analog of the decoupling limit, it is shown that the mixing interaction has a strong influence on transitions in the region of crossing between the ground-state band and the lowest two-quasiparticle (2qp) band. The mixing interaction does not change the electromagnetic properties of the states of the ground-state band. This effect is due to the approximate cancellation between self-energy and vertex corrections, which corresponds to the nuclear Ward identity. For the algebraic analog of the strong-coupling limit, the {ital K} forbiddeness of {ital E}2 transitions between the ground-state band and the lowest 2qp band is high, and therefore the influence of the mixing interaction is negligible.
- OSTI ID:
- 5536709
- Journal Information:
- Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 44:1; ISSN 0556-2813; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
E2-TRANSITIONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
INTERACTING BOSON MODEL
LIE GROUPS
MATHEMATICAL MODELS
MULTIPOLE TRANSITIONS
NUCLEAR MODELS
QUASI PARTICLES
SHELL MODELS
SU GROUPS
SU-3 GROUPS
SYMMETRY GROUPS
YRAST STATES
Moments
Spin
& Models
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
E2-TRANSITIONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
INTERACTING BOSON MODEL
LIE GROUPS
MATHEMATICAL MODELS
MULTIPOLE TRANSITIONS
NUCLEAR MODELS
QUASI PARTICLES
SHELL MODELS
SU GROUPS
SU-3 GROUPS
SYMMETRY GROUPS
YRAST STATES