Lifetime measurements of excited states in W-163 and the implications for the anomalous B(E2) ratios in transitional nuclei

Lewis, M.; Joss, D.; SAYGI, BAHADIR; Page, R.; Cullen, D.; Barber, L.; Giles, M.; Simpson, J.; Al-Aqeel, M.; Badran, H.; Braunroth, T.; Briscoe, A.; Calverley, T.; Dewald, A.; Doncel, M.; Grahn, T.; Greenlees, P.; Henrich, C.; Herzan, A.; Herzberg, R-D; Higgins, E.; Hilton, J.; Ilieva, S.; Julin, R.; Juutinen, S.; Keatings, J.; Kroell, T.; Labiche, M.; Mashtakov, K.; Singh, B.; Parr, E.; Partanen, J.; Paul, E.; Rahkila, P.; Sandzelius, M.; Saren, J.; Scholey, C.; Siciliano, M.; Spagnoletti, P.; Stolze, S.; Szwec, Sv; Taylor, M.; Uusitalo, J.

doi:10.1016/j.physletb.2019.134998

Lifetime measurements of excited states in W-163 and the implications for the anomalous B(E2) ratios in transitional nuclei

Lewis M. C., Joss D. T., SAYGI B., Page R. D., Cullen D. M., Barber L., ...Daha Fazla

PHYSICS LETTERS B, cilt.798, 2019 (SCI-Expanded, Scopus)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 798
Basım Tarihi: 2019
Doi Numarası: 10.1016/j.physletb.2019.134998
Dergi Adı: PHYSICS LETTERS B
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Anahtar Kelimeler: Mean lifetimes, B(E2) reduced transition probabilities, Recoil-distance Doppler-shift method, Nuclear deformation, Gamma-ray Spectroscopy, DECAY CURVE METHOD, DATA SHEETS, SPECTROSCOPY, PLUNGER, GE
Ankara Üniversitesi Adresli: Hayır

Özet

This letter reports lifetime measurements of excited states in the odd-N nucleus W-163 using the recoil-distance Doppler shift method to probe the core polarising effect of the i(13/2) 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. (C) 2019 The Authors. Published by Elsevier B.V.