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Nuclear shape coexistence: A study of the even-even Hg isotopes using the interacting boson model with configuration mixing

J. E. García-Ramos and K. Heyde
Phys. Rev. C 89, 014306 – Published 9 January 2014

Abstract

Background: The Po, Pb, Hg, and Pt region is known for the presence of coexisting structures that correspond to different particle-hole configurations in the shell model language or equivalently to nuclear shapes with different deformation.

Purpose: We intend to study the configuration mixing phenomenon in the Hg isotopes and to understand how different observables are influenced by it.

Method: We study in detail a long chain of mercury isotopes, 172--200Hg, using the interacting boson model with configuration mixing. The parameters of the Hamiltonians are fixed through a least-squares fit to the known energies and absolute B(E2) transition rates of states up to 3 MeV.

Results: We obtained the IBM-CM Hamiltonians and we calculate excitation energies, B(E2)'s, quadrupole shape invariants, wave functions, isotopic shifts, and mean-field energy surfaces.

Conclusions: We obtain a fairly good agreement with the experimental data for all the studied observables and we conclude that the Hamiltonian and the states we obtain constitute a good approximation to the Hg isotopes.

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  • Received 8 November 2013

DOI:https://doi.org/10.1103/PhysRevC.89.014306

©2014 American Physical Society

Authors & Affiliations

J. E. García-Ramos1,* and K. Heyde2

  • 1Departamento de Física Aplicada, Universidad de Huelva, 21071 Huelva, Spain
  • 2Department of Physics and Astronomy, Ghent University, Proeftuinstraat, 86 B-9000 Gent, Belgium

  • *Corresponding author: enrique.ramos@dfaie.uhu.es

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Vol. 89, Iss. 1 — January 2014

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