Lifetime measurements in 166Re : Collective versus magnetic rotation
Li, H. J., Cederwall, B., Doncel, M., Peng, J., Chen, Q. B., Zhang, S. Q., . . . Xiao, Z. G. (2016). Lifetime measurements in 166Re : Collective versus magnetic rotation. Physical Review C, 93 (3), 034309. doi:10.1103/PhysRevC.93.034309
Published inPhysical Review C
Peng, J. |
Meng, J. |
Bäck, T. |
© 2016 American Physical Society. Published in this repository with the kind permission of the publisher.
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. ...