Risk of misinterpretation of nearly degenerate pair bands as chiral partners in nuclei.
Phys Rev Lett
; 96(11): 112502, 2006 Mar 24.
Article
in En
| MEDLINE
| ID: mdl-16605814
ABSTRACT
The experimental information on the observed nearly degenerate bands in the N = 75 isotones, in particular 134Pr and 136Pm, 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 134Pr, 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.
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Collection:
01-internacional
Database:
MEDLINE
Type of study:
Etiology_studies
/
Risk_factors_studies
Language:
En
Journal:
Phys Rev Lett
Year:
2006
Document type:
Article
Affiliation country:
Italia