{
  "id": "1909.00824",
  "version": "v1",
  "published": "2019-09-02T18:29:44.000Z",
  "updated": "2019-09-02T18:29:44.000Z",
  "title": "The quest of shape coexistence in Zr isotopes",
  "authors": [
    "J. E. Garcia-Ramos",
    "K. Heyde"
  ],
  "comment": "Submitted to PRC",
  "categories": [
    "nucl-th",
    "nucl-ex"
  ],
  "abstract": "The mass region with A~100 and Z~40 is known to experience a sudden onset of deformation. The presence of the subshell closure $Z=40$ makes feasible to create particle-hole excitations at a moderate excitation energy and, therefore, likely intruder states could be present in the low-lying spectrum. In other words, shape coexistence is expected to be a key ingredient to understand this mass region. The aim of this work is to describe excitation energies, transition rates, radii, and two-neutron separation energies for the even-even 94-110Zr nuclei and, moreover, to obtain information about wave functions and deformation. The interacting boson model with configuration mixing will be the framework to study the even-even Zr nuclei, considering only two types of configurations: 0particle-0hole and 2p-2h excitations. On one hand, the parameters appearing in the Hamiltonian and in the E2 transition operator are fixed trough a least-squares fit to the whole available experimental information. On the other hand, once the parameters have been fixed, the calculations allow to obtain a complete set of observables for the whole even-even Zr chain of isotopes. Spectra, transition rates, radii, $\\rho^2(E0)$, and two-neutron separation energies have been calculated and a good agreement with the experimental information has been obtained. Moreover, a detailed study of the wave function has been conducted and mean-field energy surfaces and deformation have been computed too. The importance of shape coexistence has been shown to correctly describe the A~100 mass area for even-even Zr nuclei. This work confirmed the rather spherical nature of the ground state of 94-98Zr and its deformed nature for 100-110Zr isotopes. The sudden onset of deformation in 100Zr is owing to the rapid lowering of a deformed (intruder) configuration which is high-lying in lighter isotopes.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-09-02T18:29:44.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "shape coexistence",
      "zr isotopes",
      "even-even zr nuclei",
      "two-neutron separation energies",
      "wave function"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}