{
  "id": "1909.08930",
  "version": "v1",
  "published": "2019-09-19T11:58:58.000Z",
  "updated": "2019-09-19T11:58:58.000Z",
  "title": "Gamow-Teller excitations at finite temperature: competition between pairing and temperature effects",
  "authors": [
    "E. Yüksel",
    "N. Paar",
    "G. Colò",
    "E. Khan",
    "Y. F. Niu"
  ],
  "comment": "15 pages, 5 figures, submitted for publication",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The relativistic and non-relativistic finite temperature proton-neutron quasiparticle random phase approximation (FT-PNQRPA) methods are developed to study the interplay of the pairing and temperature effects on the Gamow-Teller excitations in open-shell nuclei, as well as to explore the model dependence of the results by using two rather different frameworks for effective nuclear interactions. The Skyrme-type functional SkM* is employed in the non-relativistic framework, while the density-dependent meson-exchange interaction DD-ME2 is implemented in the relativistic approach. Both the isoscalar and isovector pairing interactions are taken into account within the FT-PNQRPA. Model calculations show that below the critical temperatures the Gamow-Teller excitations display a sensitivity both to the finite temperature and pairing effects, and this demonstrates the necessity for implementing both in the theoretical framework. The established FT-PNQRPA opens perspectives for the future complete and consistent description of astrophysically relevant weak interaction processes in nuclei at finite temperature such as beta decays, electron capture and neutrino-nucleus reactions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-09-19T11:58:58.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "gamow-teller excitations",
      "temperature effects",
      "quasiparticle random phase approximation",
      "relevant weak interaction processes",
      "proton-neutron quasiparticle random phase"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}