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Chiral bands, dynamical spontaneous symmetry breaking, and the selection rule for electromagnetic transitions in the chiral geometry

Koike, T ; Starosta, K and Hamamoto-Kuroda, Ikuko LU (2004) In Physical Review Letters 93(17).
Abstract
A model for a special configuration in triaxial odd-odd nuclei is constructed which exhibits degenerate chiral bands with a sizable rotation, a manifestation of dynamical spontaneous symmetry breaking. A quantum number obtained from the invariance of the model Hamiltonian, which characterizes observable states, is given and selection rules for electromagnetic transition probabilities in chiral bands is derived in terms of this quantum number. The degeneracy of the lowest two bands is indeed obtained in the numerical diagonalization of the Hamiltonian at an intermediate spin range, over which electromagnetic transitions follow exactly the selection rule expected for the chiral geometry.
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
93
issue
17
article number
172502
publisher
American Physical Society
external identifiers
  • wos:000224662700020
  • scopus:19744381496
  • pmid:15525069
ISSN
1079-7114
DOI
10.1103/PhysRevLett.93.172502
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)
id
eec40e5b-45fd-4be4-bf99-28c02be204b6 (old id 263648)
date added to LUP
2016-04-01 11:50:12
date last changed
2022-04-05 05:44:49
@article{eec40e5b-45fd-4be4-bf99-28c02be204b6,
  abstract     = {{A model for a special configuration in triaxial odd-odd nuclei is constructed which exhibits degenerate chiral bands with a sizable rotation, a manifestation of dynamical spontaneous symmetry breaking. A quantum number obtained from the invariance of the model Hamiltonian, which characterizes observable states, is given and selection rules for electromagnetic transition probabilities in chiral bands is derived in terms of this quantum number. The degeneracy of the lowest two bands is indeed obtained in the numerical diagonalization of the Hamiltonian at an intermediate spin range, over which electromagnetic transitions follow exactly the selection rule expected for the chiral geometry.}},
  author       = {{Koike, T and Starosta, K and Hamamoto-Kuroda, Ikuko}},
  issn         = {{1079-7114}},
  language     = {{eng}},
  number       = {{17}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Chiral bands, dynamical spontaneous symmetry breaking, and the selection rule for electromagnetic transitions in the chiral geometry}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.93.172502}},
  doi          = {{10.1103/PhysRevLett.93.172502}},
  volume       = {{93}},
  year         = {{2004}},
}