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, Bahadır
- Page, Robert D.
- Cullen, David M.
- Barber, L.
- Giles, Michael
- Simpson, John J.
- Al-Aqeel, M. A. M.
- Badran, H.
- Braunroth, Thomas
- Briscoe, Andy D.
- Calverley, T.
- Dewald, Alfred
- Doncel, M.
- Grahn, Tuomas
- Greenlees, Paul
- Henrich, Corinna
- Herzáň, Andrej
- Herzberg, Rolf Dietmar
- Higgins, Edward J.
- Hilton, J.
- Ilieva, Stoyanka
- Julin, Rauno
- Juutinen, Sakari
- Keatings, James Michael
- Kröll, Thorsten
- Labiche, Marc A.
- Mashtakov, Konstantin R.
- Nara Singh, Bondili S.
- Parr, Edward J.
- Partanen, J.
- Paul, Edward S.
- Rahkila, Panu M.
- Sandzelius, M.
- Sarén, Jan J.
- Scholey, Cath S.
- Siciliano, Marco
- Spagnoletti, Pietro
- Stolze, S. M.
- Szwec, Stuart V.
- Taylor, Michael J.
- Uusitalo, Juha
DOIAbstract
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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