Classical and quantum properties of the semiregular arc inside the Casten triangle

Journal Article · Fri Jun 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.064318· OSTI ID:21003465

Macek, Michal; Stransky, Pavel; Cejnar, Pavel; Heinze, Stefan; Jolie, Jan; Dobes, Jan ^[1]

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1. Faculty of Mathematics and Physics, Charles University, V Holesovickach 2, CZ-18000 Prague (Czech Republic)

We investigate classical and quantum signatures of increased regularity in the Alhassid-Whelan semiregular arc inside the symmetry triangle of the interacting boson model. A significant bunching/antibunching pattern of quantum levels, similar to that observed along the O(6)-U(5) transition, is found in the 0{sup +} energy spectrum and related to a crossover of two specific families of classical regular orbits slightly above E=0. We also discuss the degeneracy of {beta} and {gamma} bandheads in a region close to the arc and the relation to regularity in the geometric model.

• OSTI ID: 21003465
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ENERGY SPECTRA
INTERACTING BOSON MODEL
ORBITS
QUANTUM MECHANICS
SYMMETRY