{
  "id": "1304.0820",
  "version": "v1",
  "published": "2013-04-03T01:59:48.000Z",
  "updated": "2013-04-03T01:59:48.000Z",
  "title": "Effects of ground-state correlations on collective excitations of $^{16}$O",
  "authors": [
    "Mitsuru Tohyama"
  ],
  "comment": "4 pages, 4 figures",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The effects of the correlations in the ground state of $^{16}$O on the octupole and dipole excitations are studied using the extended random phase approximation (ERPA) derived from the time-dependent density-matrix theory. It is found that the ground-state correlation effects are significant especially in the octupole excitation. It is shown that the first $3^-$ state calculated in the random phase approximation (RPA) is shifted upward when the self-energy contributions are included in particle - hole pairs. The coupling to the two particle - two hole states plays a role in shifting the first $3^-$ state down to the right position. It is also found that the dipole strength is fragmented due to the partial occupation of the single-particle states and that the peak position of the giant dipole resonance calculated in ERPA is little changed from that in RPA due to the above-mentioned competing effects: the increase in particle - hole energy and the coupling to two particle - two hole configurations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-04-03T01:59:48.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "21.60.Jz",
      "21.10.Pc",
      "27.20.+n"
    ],
    "keywords": [
      "collective excitations",
      "ground-state correlation effects",
      "extended random phase approximation",
      "time-dependent density-matrix theory",
      "hole states plays"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevC.87.054330",
      "journal": "Physical Review C",
      "year": 2013,
      "month": "May",
      "volume": 87,
      "number": 5,
      "pages": "054330"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1226847,
      "adsabs": "2013PhRvC..87e4330T"
    }
  }
}