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Risk of misinterpretation of nearly degenerate pair bands as chiral partners in nuclei

Petrache, CM ; Hagemann, GB ; Hamamoto-Kuroda, Ikuko LU and Starosta, K (2006) In Physical Review Letters 96(11).
Abstract
The experimental information on the observed nearly degenerate bands in the N = 75 isotones, in particular Pr-134 and Pm-136, which are often considered as the best candidates for chiral bands, is critically analyzed. Most properties of the bands, in particular, the recently measured branching ratios and lifetimes, are in clear disagreement with the interpretation of the two bands as chiral bands. For I = 14-18 in Pr-134, where the observed energies are almost degenerate, we have obtained a value of 2.0(4) for the ratio of the transition quadrupole moments of the two bands, which implies a considerable difference in the nuclear shape associated with the two bands. The insufficiency of the near-degeneracy criterion to trace nuclear... (More)
The experimental information on the observed nearly degenerate bands in the N = 75 isotones, in particular Pr-134 and Pm-136, which are often considered as the best candidates for chiral bands, is critically analyzed. Most properties of the bands, in particular, the recently measured branching ratios and lifetimes, are in clear disagreement with the interpretation of the two bands as chiral bands. For I = 14-18 in Pr-134, where the observed energies are almost degenerate, we have obtained a value of 2.0(4) for the ratio of the transition quadrupole moments of the two bands, which implies a considerable difference in the nuclear shape associated with the two bands. The insufficiency of the near-degeneracy criterion to trace nuclear chirality is emphasized. (Less)
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
96
issue
11
article number
112502
publisher
American Physical Society
external identifiers
  • wos:000236249900016
  • scopus:33645064803
ISSN
1079-7114
DOI
10.1103/PhysRevLett.96.112502
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
89935924-b346-4331-9154-a5138ddd6509 (old id 414998)
date added to LUP
2016-04-01 12:38:48
date last changed
2020-11-22 04:39:29
@article{89935924-b346-4331-9154-a5138ddd6509,
  abstract     = {The experimental information on the observed nearly degenerate bands in the N = 75 isotones, in particular Pr-134 and Pm-136, which are often considered as the best candidates for chiral bands, is critically analyzed. Most properties of the bands, in particular, the recently measured branching ratios and lifetimes, are in clear disagreement with the interpretation of the two bands as chiral bands. For I = 14-18 in Pr-134, where the observed energies are almost degenerate, we have obtained a value of 2.0(4) for the ratio of the transition quadrupole moments of the two bands, which implies a considerable difference in the nuclear shape associated with the two bands. The insufficiency of the near-degeneracy criterion to trace nuclear chirality is emphasized.},
  author       = {Petrache, CM and Hagemann, GB and Hamamoto-Kuroda, Ikuko and Starosta, K},
  issn         = {1079-7114},
  language     = {eng},
  number       = {11},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Risk of misinterpretation of nearly degenerate pair bands as chiral partners in nuclei},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.96.112502},
  doi          = {10.1103/PhysRevLett.96.112502},
  volume       = {96},
  year         = {2006},
}