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High-spin terminating states in theN=88Ho155andEr156isotones

J. M. Rees, E. S. Paul, J. Simpson, M. A. Riley, A. D. Ayangeakaa, M. P. Carpenter, C. J. Chiara, U. Garg, P. Hampson, D. J. Hartley, C. R. Hoffman, R. V. F. Janssens (+14 others)
2015 Physical Review C  

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REVT E X 4: 155 Ho -loss of collectivity 2 Abstract The 124 Sn( 37 Cl,6nγ) fusion-evaporation reaction at a bombarding energy of 180 MeV has been used to significantly extend the excitation level scheme of 155 67 Ho 88 . The collective rotational behavior of this nucleus breaks down above spin I ∼ 30 and a fully aligned non-collective (band terminating) state has been identified at I π = 79/2 − . Comparison with cranked Nilsson-Strutinsky calculations also provides evidence for core-excited
more » ... collective states at I π = 87/2 − and (89/2 + ) involving particle-hole excitations across the Z = 64 shell gap. A similar core-excited state in 156 68 Er 88 at I π = (46 + ) is also presented.
doi:10.1103/physrevc.91.054301 fatcat:enb4w5evljgtdcxsiykzreh6xa
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J. M. Rees, E. S. Paul, J. Simpson, M. A. Riley, A. D. Ayangeakaa, M. P. Carpenter, C. J. Chiara, U. Garg, P. Hampson, D. J. Hartley, C. R. Hoffman, R. V. F. Janssens, F. G. Kondev, T. Lauritsen, P. J. R. Mason, J. Matta, S. L. Miller, P. J. Nolan, J. Ollier, M. Petri, D. C. Radford, J. P. Revill, X. Wang, S. Zhu, J. Gellanki, I. Ragnarsson. "High-spin terminating states in theN=88Ho155andEr156isotones." Physical Review C 91.5 (2015)