Lifetime measurements of excited states in $^{163}$W and the implications for the anomalous B(E2) ratios in transitional nuclei
- Lewis, M.C.
- Joss, D.T.
- Sayği, 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.
- Grahn, T.
- Greenlees, P.T.
- Henrich, C.
- Herzáň, A.
- Herzberg, R.-D.
- Higgins, E.
- Hilton, J.
- Ilieva, S.
- Julin, R.
- Juutinen, S.
- Keatings, J.
- Kröll, T.
- Labiche, M.
- Mashtakov, K.
- Nara Singh, B.S.
- Parr, E.
- Partanen, J.
- Paul, E.S.
- Rahkila, P.
- Sandzelius, M.
- Sarén, J.
- Scholey, C.
- Siciliano, M.
- Spagnoletti, P.
- Stolze, S.
- Szwec, S.V.
- Taylor, M.J.
- Uusitalo, J.
DOIAbstract
International audienceThis letter reports lifetime measurements of excited states in the odd- N nucleus 163 W 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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