{
  "id": "1807.06407",
  "version": "v1",
  "published": "2018-07-17T13:21:50.000Z",
  "updated": "2018-07-17T13:21:50.000Z",
  "title": "Nature of isoscalar dipole resonances in heavy nuclei",
  "authors": [
    "V. I. Abrosimov",
    "O. I. Davidovskaya"
  ],
  "comment": "9 pages, 7 figures",
  "categories": [
    "nucl-th"
  ],
  "abstract": "Isoscalar dipole nuclear response reveals the low- and high-energy resonances. The nature of isoscalar dipole resonances in heavy spherical nuclei is studied by using the translation-invariant kinetic model of small oscillations of finite Fermi systems. Calculations of the velocity field at the centroid energy show a pure vortex character of the low-energy isoscalar dipole resonance in spherical nuclei and confirm the anisotropic compression character of the high-energy one. The evolution of the velocity field in dependence on the excitation energy of the nucleus within the resonance width is studied. It is found that the low-energy isoscalar dipole resonance retains a vortex character while with increasing energy this collective excitation also involves compression. The high-energy resonance keeps the compression character with a change in the excitation energy within the resonance width but the compression-expansion region of the velocity field related to this resonance shifts inside the nucleus.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-07-17T13:21:50.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "heavy nuclei",
      "velocity field",
      "low-energy isoscalar dipole resonance retains",
      "vortex character",
      "high-energy resonance"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}