January 2017

Journal

Persistence of collective behavior at high spin in the N=88 nucleus Tb-153

By:
Hartley, D; Riley, M.; Wang, X.; Miller, S.; Janssens, R.; Paul, E.; Rees, J.; Simpson, J; Riedinger, L. L.; Ayangeakaa, A.; Carpenter, M.; Chiara, C.; Garg, U.; Hampson, P.; Hoffman, C.R.; Kondev, F.; Lauritsen, T.; Mason, P.; Matta, J.; Nolan, P.; Ollier, J.; Petri, M.; Radford, D.; Revill, J.; Zhu, S.; Ragnarsson, I.
Journal Name:
Physical Review C
Page Number:
57301-57301
Volume:
91
Issue Number:
5
Publication Date:
January 4, 2017
View DOI Listing:
https://doi.org/10.1103/PhysRevC.91.057301

Abstract

Excited states in the N = 88 nucleus Tb-153 were observed up to spin similar to 40 in an experiment utilizing the Gammasphere array. The Tb-153 states were populated in a weak alpha 4n evaporation channel of the Cl-37 + Sn-124 reaction. Two previously known sequences were extended to higher spins, and a new decoupled structure was identified. The pi h(11/2) band was observed in the spin region where other N = 88 isotopes exhibit effects of prolate to oblate shape changes leading to band termination along the yrast line, whereas Tb-153 displays a persistent collective behavior. However, minor perturbations of the very highest state in both signatures of this h(11/2) band are observed, which perhaps signal the start of the transition towards band termination.