Identification of excited states in the T-z=1 nucleus Xe-110: Evidence for enhanced collectivity near the N=Z=50 double shell closure

M. Sandzelius, B. Hadinia, B. Cederwall, K. Andgren, E. Ganioglu, I. G. Darby, M. R. Dimmock, S. Eeckhaudt, T. Grahn, P. T. Greenlees, E. Ideguchi, P. M. Jones, D. T. Joss, R. Julin, S. Juutinen, A. Khaplanov, M. Leino, L. Nelson, M. Niikura, M. NymanR. D. Page, J. Pakarinen, E. S. Paul, Marina Petri, P. Rahkila, J. Saren, C. Scholey, J. Sorri, J. Uusitalo, R. Wadsworth, R. Wyss

Research output: Contribution to journalArticlepeer-review

Abstract

Gamma-ray transitions have been identified for the first time in the extremely neutron-deficient (N=Z+2) nucleus Xe-110, and the energies of the three lowest excited states in the ground-state band have been deduced. The results establish a breaking of the normal trend of increasing first excited 2(+) and 4(+) level energies as a function of the decreasing neutron number as the N=50 major shell gap is approached for the neutron-deficient Xe isotopes. This unusual feature is suggested to be an effect of enhanced collectivity, possibly arising from isoscalar n-p interactions becoming increasingly important close to the N=Z line.

Original languageEnglish
Article number022501
Pages (from-to)-
Number of pages4
JournalPhysical Review Letters
Volume99
Issue number2
DOIs
Publication statusPublished - 13 Jul 2007

Keywords

  • MEAN-FIELD DESCRIPTION
  • PROTON-RICH NUCLEI
  • EVEN-EVEN NUCLEI
  • DEFORMATION
  • ISOTOPES

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