Evolution of the multiplet in the neutron-rich 49 In isotopes: Evidence for the gradual filling of the neutron sub-shell

M.-G. Porquet; A. Astier; I. Deloncle; O. Dorvaux; B. J. P. Gall; R. Lucas; M. Meyer; A. Prévost; N. Redon; N. Schulz; O. Stézowski

doi:10.1140/epja/i2003-10161-8

2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A (2004) 20: 245-250
https://doi.org/10.1140/epja/i2003-10161-8

Evolution of the multiplet in the neutron-rich ₄₉ In isotopes: Evidence for the gradual filling of the neutron sub-shell

M.-G. Porquet¹^*, A. Astier¹, I. Deloncle¹, O. Dorvaux², B. J. P. Gall², R. Lucas³, M. Meyer⁴, A. Prévost⁴^,1, N. Redon⁴, N. Schulz² and O. Stézowski⁴

¹ 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: porquet@csnsm.in2p3.fr

Abstract

High-spin states from the three-quasiparticle (3qp) configuration gh_11/2 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.