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

Sandzelius, M.; Hadinia, B.; Cederwall, B.; Andgren, K.; Ganioglu, Ela; DARBY, I.; DIMMOCK, M.; Eeckhaudt, S.; GRAHN, T.; GREENLEES, P.; Ideguchi, E.; JONES, P.; JOSS, D.; Julin, R.; Juutinen, S.; Khaplanov, A.; Leino, M.; Nelson, L.; Niikura, M.; Nyman, M.; PAGE, R.; PAKARINEN, J.; PAUL, E.; Petri, M.; Rahkila, P.; Saren, J.; Scholey, C.; Sorri, J.; UUSITALO, J.; WADSWORTH, R.; Wyss, R.

doi:10.1103/physrevlett.99.022501

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

Sandzelius M., Hadinia B., Cederwall B., Andgren K., Ganioglu E., DARBY I. G., ...More

PHYSICAL REVIEW LETTERS, vol.99, no.2, 2007 (SCI-Expanded)

Publication Type: Article / Article
Volume: 99 Issue: 2
Publication Date: 2007
Doi Number: 10.1103/physrevlett.99.022501
Journal Name: PHYSICAL REVIEW LETTERS
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Istanbul University Affiliated: Yes

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.