{
  "id": "nucl-th/0609061",
  "version": "v1",
  "published": "2006-09-21T09:19:09.000Z",
  "updated": "2006-09-21T09:19:09.000Z",
  "title": "Covariant response theory beyond RPA and its application",
  "authors": [
    "E. Litvinova",
    "P. Ring",
    "V. Tselyaev"
  ],
  "comment": "12 pages, 4 figures, Proceedings of the NSRT06 Conference",
  "journal": "Phys.Atom.Nucl.70:1380-1385,2007",
  "doi": "10.1134/S1063778807080108",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The covariant particle-vibration coupling model within the time blocking approximation is employed to supplement the Relativistic Random Phase Approximation (RRPA) with coupling to collective vibrations. The Bethe-Salpeter equation in the particle-hole channel with an energy dependent residual particle-hole (p-h) interaction is formulated and solved in the shell-model Dirac basis as well as in the momentum space. The same set of the coupling constants generates the Dirac-Hartree single-particle spectrum, the static part of the residual p-h interaction and the particle-phonon coupling amplitudes. This approach is applied to quantitative description of damping phenomenon in even-even spherical nuclei with closed shells $^{208}$Pb and $^{132}$Sn. Since the phonon coupling enriches the RRPA spectrum with a multitude of ph$\\otimes$phonon states a noticeable fragmentation of giant monopole and dipole resonances is obtained in the examined nuclei. The results are compared with experimental data and with results of the non-relativistic approach.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2006-09-21T09:19:09.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "24.10.Cn",
      "21.10.-k",
      "21.60.Jz",
      "24.30.Gz",
      "21.30.Fe",
      "21.60.-n"
    ],
    "keywords": [
      "covariant response theory",
      "application",
      "relativistic random phase approximation",
      "energy dependent residual particle-hole",
      "covariant particle-vibration coupling model"
    ],
    "tags": [
      "conference paper",
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 726721
    }
  }
}