학술논문
Lifetime measurements of excited states in 163W and the implications for the anomalous B(E2) ratios in transitional nuclei
Document Type
article
Author
M.C. Lewis; D.T. Joss; B. Sayğı; R.D. Page; D.M. Cullen; L. Barber; M.M. Giles; J. Simpson; M.A.M. Al-Aqeel; H. Badran; T. Braunroth; A.D. Briscoe; T. Calverley; A. Dewald; M. Doncel; T. Grahn; P.T. Greenlees; C. Henrich; A. Herzáň; R.-D. Herzberg; E. Higgins; J. Hilton; S. Ilieva; R. Julin; S. Juutinen; J. Keatings; T. Kröll; M. Labiche; K. Mashtakov; B.S. Nara Singh; E. Parr; J. Partanen; E.S. Paul; P. Rahkila; M. Sandzelius; J. Sarén; C. Scholey; M. Siciliano; P. Spagnoletti; S. Stolze; S.V. Szwec; M.J. Taylor; J. Uusitalo
Source
Physics Letters B, Vol 798, Iss , Pp - (2019)
Subject
Language
English
ISSN
0370-2693
Abstract
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. Keywords: Mean lifetimes, B(E2) reduced transition probabilities, Recoil-distance Doppler-shift method, Nuclear deformation, Gamma-ray Spectroscopy