Spectroscopy of neutron-rich Te and Xe isotopes within a new shell model context

D. Bianco, N. Lo Iudice, F. Andreozzi, A. Porrino, and F. Knapp
Phys. Rev. C 88, 024303 – Published 5 August 2013

Abstract

Te and Xe isotopes above the N=82 shell closure are investigated within a large-scale shell model approach based on an iterative matrix diagonalization algorithm. The spectra and transition strengths, computed using a realistic Hamiltonian, are in overall agreement with the available experimental data. The calculation predicts an increasing neutron weight in the lowest collective 21+ state of the isotopes as they depart from the doubly magic 132Sn and move toward the neutron drip line. Such a neutron dominance is predicted to cause a breaking of the neutron-proton exchange symmetry and a dramatic drop of the strengths of the E2 and M1 transitions among the excited 2+ states. This drop establishes a strong asymmetry between Te and Xe isotopes above and below the N=82 shell closure.

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  • Received 19 April 2013

DOI:https://doi.org/10.1103/PhysRevC.88.024303

©2013 American Physical Society

Authors & Affiliations

D. Bianco1,2,*, N. Lo Iudice1,2, F. Andreozzi1,2, A. Porrino1,2, and F. Knapp3

  • 1Dipartimento di Fisica, Università di Napoli Federico II, Monte S. Angelo, via Cintia, I-80126 Napoli, Italy
  • 2Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Monte S. Angelo, via Cintia, I-80126 Napoli, Italy
  • 3Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic

  • *Present address: Ecole Normale Superieur (ENS) de Cachan, 61 av. du Président Wilson, Cachan, France.

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Vol. 88, Iss. 2 — August 2013

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