{
  "id": "1410.0614",
  "version": "v1",
  "published": "2014-10-02T17:25:24.000Z",
  "updated": "2014-10-02T17:25:24.000Z",
  "title": "Influence of 2p-2h configurations on beta-decay rates",
  "authors": [
    "A. P. Severyukhin",
    "V. V. Voronov",
    "I. N. Borzov",
    "N. N. Arsenyev",
    "Nguyen Van Giai"
  ],
  "comment": "8 pages, 6 figures, accepted for publication in Physical Review C",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The effects of the phonon-phonon coupling on the beta-decay rates of neutron-rich nuclei are studied in a microscopic model based on Skyrme-type interactions. The approach uses a finite-rank separable approximation of the Skyrme-type particle-hole (p-h) residual interaction. Very large two-quasiparticle spaces can thus be treated. A redistribution of the Gamow-Teller (G-T) strength is found due to the tensor correlations and the 2p-2h fragmentation of G-T states. As a result, the beta-decay half-lives are decreased significantly. Using the Skyrme interaction SGII together with a volume-type pairing interaction we illustrate this reduction effect by comparing with available experimental data for the Ni isotopes and neutron-rich N=50 isotones. We give predictions for 76Fe and 80Ni in comparison with the case of the doubly-magic nucleus 78Ni which is an important waiting point in the r-process.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-10-02T17:25:24.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "21.60.Jz",
      "23.40.-s",
      "21.60.Ev",
      "21.10.Re"
    ],
    "keywords": [
      "beta-decay rates",
      "2p-2h configurations",
      "large two-quasiparticle spaces",
      "skyrme interaction sgii",
      "doubly-magic nucleus 78ni"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevC.90.044320",
      "journal": "Physical Review C",
      "year": 2014,
      "month": "Oct",
      "volume": 90,
      "number": 4,
      "pages": "044320"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1319796,
      "adsabs": "2014PhRvC..90d4320S"
    }
  }
}