Identification of Excited States in theTz=1NucleusXe110: Evidence for Enhanced Collectivity near theN=Z=50Double Shell Closure
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Identification of Excited States in theTz=1NucleusXe110: Evidence for Enhanced Collectivity near theN=Z=50Double 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. Nyman,R. D. Page,Janne Pakarinen,E. S. Paul,Marina Petri,P. Rahkila,J. Sarén,Catherine Scholey,J. Sorri,J. Uusitalo,R. Wadsworth,R. Wyss;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. Nyman;R. D. Page;Janne Pakarinen;E. S. Paul;Marina Petri;P. Rahkila;J. Sarén;Catherine Scholey;J. Sorri;J. Uusitalo;R. Wadsworth;R. Wyss;
physical review letters 2007 Vol. 99 pp. 022501-
163
wyss2007physicalidentification

Abstract

Gamma-ray transitions have been identified for the first time in the extremely neutron-deficient (N=Z+2) nucleus Xe110, 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.

Keywords

gamma radiation gamma ray ground state excited states

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DOI:
10.1103/physrevlett.99.022501
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