{
  "id": "nucl-th/0701025",
  "version": "v1",
  "published": "2007-01-10T11:33:05.000Z",
  "updated": "2007-01-10T11:33:05.000Z",
  "title": "Calculation of beta-decay rates in a relativistic model with momentum-dependent self-energies",
  "authors": [
    "T. Marketin",
    "D. Vretenar",
    "P. Ring"
  ],
  "comment": "16 pages, 3 figures, submitted to Physical Review C",
  "journal": "Phys.Rev.C75:024304,2007",
  "doi": "10.1103/PhysRevC.75.024304",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The relativistic proton-neutron quasiparticle random phase approximation (PN-RQRPA) is applied in the calculation of beta-decay half-lives of neutron-rich nuclei in the $Z\\approx 28$ and $Z\\approx 50$ regions. The study is based on the relativistic Hartree-Bogoliubov calculation of nuclear ground-states, using effective Lagrangians with density-dependent meson-nucleon couplings, and also extended by the inclusion of couplings between the isoscalar meson fields and the derivatives of the nucleon fields. This leads to a linear momentum dependence of the scalar and vector nucleon self-energies. The residual QRPA interaction in the particle-hole channel includes the $\\pi + \\rho$ exchange plus a Landau-Migdal term. The finite-range Gogny interaction is employed in the T=1 pairing channel, and the model also includes a proton-neutron particle-particle interaction. The results are compared with available data, and it is shown that an extension of the standard relativistic mean-field framework to include momentum-dependent nucleon self-energies naturally leads to an enhancement of the effective (Landau) nucleon mass, and thus to an improved PN-QRPA description of beta-decay rates.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2007-01-10T11:33:05.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "21.30.Fe",
      "21.60.Jz"
    ],
    "keywords": [
      "beta-decay rates",
      "relativistic model",
      "momentum-dependent self-energies",
      "calculation",
      "relativistic proton-neutron quasiparticle random phase"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. C"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 742161
    }
  }
}