Multiparticle configurations of excited states in 155Lu
Carroll, R. J., Hadinia, B., Qi, C., Joss, D. T., Page, R. D., Uusitalo, J., . . . Simpson, J. (2016). Multiparticle configurations of excited states in 155Lu. Physical Review C, 94 (6), 064311. doi:10.1103/PhysRevC.94.064311
Published in
Physical Review CDate
2016Copyright
© 2016 American Physical Society. Published in this repository with the kind permission of the publisher.
Excited states in the neutron-deficient N=84 nuclide 155Lu have been populated by using the 102Pd(58Ni,αp) reaction. The 155Lu nuclei were separated by using the gas-filled recoil ion transport unit (RITU) separator and implanted into the Si detectors of the gamma recoil electron alpha tagging (GREAT) spectrometer. Prompt γ-ray emissions measured at the target position using the JUROGAM Ge detector array were assigned to 155Lu through correlations with α decays measured in GREAT. Structures feeding the (11/2−) and (25/2−)α-decaying states have been revised and extended. Shell-model calculations have been performed and are found to reproduce the excitation energies of several of the low-lying states observed to within an average of 71 keV. In particular, the seniority inversion of the 25/2− and 27/2− states is reproduced.