High-spin terminating states in the N=88 Ho-155 and Er-156 isotones

Research output: Contribution to journalArticle

Abstract

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.

Details

Authors
  • 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
  • Jnaneswari Gellanki
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number054301
JournalPhysical Review C (Nuclear Physics)
Volume91
Issue number5
Publication statusPublished - 2015
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)