High-spin terminating states in the N=88 Ho155 and Er156 isotones

Rees, J. M.; Paul, E. S.; Simpson, J.; Riley, M. A.; Ayangeakaa, A. D.; Carpenter, M. P.; Chiara, C. J.; Garg, U.; Hampson, P.; Hartley, D. J.; Hoffman, C. R.; Janssens, R. V.  F.; Kondev, F. G.; Lauritsen, T.; Mason, P. J.  R.; Matta, J.; Miller, S. L.; Nolan, P. J.; Ollier, J.; Petri, M.; Radford, D. C.; Revill, J. P.; Wang, X.; Zhu, S.; Gellanki, J.; Ragnarsson, I.

doi:10.1103/PhysRevC.91.054301

Title: High-spin terminating states in the $N = 88$ ${}^{155}{Ho}$ and ${}^{156}{Er}$ isotones

Journal Article · Fri May 01 00:00:00 EDT 2015 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.91.054301· OSTI ID:1391864

Rees, J. M.; Paul, E. S.; Simpson, J.; Riley, M. A.; Ayangeakaa, A. D.; Carpenter, M. P.; Chiara, C. J.; Garg, U.; Hampson, P.; Hartley, D. J.; Hoffman, C. R.; Janssens, R. V. F.; Kondev, F. G.; Lauritsen, T.; Mason, P. J. R.; Matta, J.; Miller, S. L.; Nolan, P. J.; Ollier, J.; Petri, M. more »

The Sn-124(Cl-37, 6n gamma) fusion-evaporation reaction at a bombarding energy of 180 MeV has been used to significantly extend the excitation level scheme of Ho-155(67)88. The collective rotational behavior of this nucleus breaks down above spin I similar to 30 and a fully aligned noncollective (band terminating) state has been identified at I-pi = 79/2(-). Comparison with cranked Nilsson-Strutinsky calculations also provides evidence for core-excited noncollective states at I-pi = 87/2(-) and (89/2(+)) involving particle-hole excitations across the Z = 64 shell gap. A similar core-excited state in Er-156(68)88 at I-pi = (46(+)) is also presented.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science - Office of Nuclear Physics; United Kingdom Science and Technology Facilities Council

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1391864

Journal Information:: Physical Review. C, Nuclear Physics, Vol. 91, Issue 5; ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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