Lifetime measurements of excited states in 163W and the implications for the anomalous B(E2) ratios in transitional nuclei
Lewis, M.C.; Joss, D.T.; Sayğı, B.; Page, R.D.; Cullen, D.M.; Barber, L.; Giles, M.M.; Simpson, J.; Al-Aqeel, M.A.M.; Badran, H.; Braunroth, T.; Briscoe, A.D.; Calverley, T.; Dewald, A.; Doncel, M. et al. (2019). Lifetime measurements of excited states in 163W and the implications for the anomalous B(E2) ratios in transitional nuclei. Physics Letters B, 798, 134998-. DOI: 10.1016/j.physletb.2019.134998
Published inPhysics Letters B
Parr, E. |
© 2019 The Authors.
This letter reports lifetime measurements of excited states in the odd-N nucleus 163W using the recoil-distance Doppler shift method to probe the core polarising effect of the i13/2 neutron orbital on the underlying soft triaxial even-even core. The ratio B(E2:21/2+→17/2+)/B(E2:17/2+→13/2+) is consistent with the predictions of the collective rotational model. The deduced B(E2) values provide insights into the validity of collective model predictions for heavy transitional nuclei and a geometric origin for the anomalous B(E2) ratios observed in nearby even-even nuclei is proposed.
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