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Lifetime measurements in 166Re : Collective versus magnetic rotation
- Publication Year :
- 2016
- Publisher :
- American Physical Society, 2016.
-
Abstract
- Lifetimes of excited states in the neutron-deficient odd-odd nucleus 166Re have been measured for the first time using the recoil distance Doppler-shift method. The measured lifetime for the (8−) state; τ = 480 (80) ps, enabled an assessment of the multipolarities of the γ rays depopulating this state. Information on electromagnetic transition strengths were deduced for the γ -ray transitions from the (9−), (10−), and (11−) states, and in the case of the (10−) and (11−) states limits on the B(M1) and B(E2) strengths were estimated. The results are compared with total Routhian surface predictions and semiclassical calculations. Tilted-axis cranking calculations based on a relativistic mean-field approach (TAC-RMF) have also been performed in order to test the possibility of magnetic rotation in the 166Re nucleus. While the TAC-RMF calculations predict a quadrupole-deformed nuclear shape with similar β2 deformation as obtained by using the TRS model, it was found that the experimental electromagnetic transition rates are in better agreement with a collective-rotational description. peerReviewed
- Subjects :
- Nuclear Theory
lifetimes
rhenium
excited states
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.od......1222..f5cb2f0e518c4c6c7e7af3d686780728