Evolution of the multiplet in the neutron-rich 49 In isotopes: Evidence for the gradual filling of the neutron sub-shell
CSNSM, IN2P3-CNRS and Université Paris-Sud, F-91405, Orsay, France
2 IReS, IN2P3-CNRS and Université Louis Pasteur, F-67037, Strasbourg, France
3 DAPNIA/SPhN, CEA Saclay, F-91191, Gif-sur-Yvette, France
4 IPNL, IN2P3-CNRS and Université Claude Bernard, F-69622, Villeurbanne, France
* e-mail: email@example.com
High-spin states from the three-quasiparticle (3qp) configuration gh11/2 2 in the neutron-rich 49In isotopes have been studied in the framework of shell model calculation. The two-body residual interactions needed for such calculations have been extracted from the level schemes of neighbouring nuclei. In particular, the evolution of the proton-neutron interaction has been analyzed as a function of the neutron number. When the gradual filling of the sub-shell is taken into account, the results of the 3qp configuration calculations are found to be very close to the experimental positive-parity yrast states located above 2 MeV excitation energy in In. Moreover, several long-lived isomeric states with positive parity are predicted in 123,125,127In.
© Società Italiana di Fisica and Springer-Verlag, 2004