High-spin states beyond the proton drip-line: Quasiparticle alignments in Cs-113
Wady, P., Smith, J., Hadinia, B., Cullen, D., Freeman, S., Darby, I., . . . Wadsworth, R. (2015). High-spin states beyond the proton drip-line: Quasiparticle alignments in Cs-113. Physics Letters B, 740, 243-249. doi:10.1016/j.physletb.2014.11.045
Published inPhysics Letters B
© 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
Excited states have been studied in the deformed proton emitter 113Cs. Gamma-ray transitions have been unambiguously assigned to 113Cs by correlation with its characteristic proton decay, using the method of recoil-decay tagging. Two previously identified rotational bands have been observed and extended to tentative spins of 45/2 and 51/2 h¯, with excitation energies over 8 MeV above the lowest state. These are the highest angular momenta and excitation energies observed to date in any nucleus beyond the proton drip-line. Transitions in the bands have been rearranged compared to previous work. A study of aligned angular momenta, in comparison to the predictions of Woods–Saxon cranking calculations, is consistent with the most intense band being based on the π g7/23/2+ configuration, which would contradict the earlier πh11/2 assignment, and with the second band being based on the πd5/21/2+ configuration. The data suggest that the band based upon the πh11/2 configuration is not observed. ...