{
  "id": "1406.1656",
  "version": "v2",
  "published": "2014-06-06T12:06:11.000Z",
  "updated": "2014-10-28T09:20:19.000Z",
  "title": "Further explorations of the alpha-particle optical model potential at low energies for the mass range A=45-209",
  "authors": [
    "V. Avrigeanu",
    "M. Avrigeanu",
    "C. Mănăilescu"
  ],
  "comment": "14 pages, 11 figures, accepted for publication in Phys. Rev. C",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The recent high-precision measurements of alpha-particle induced reaction data below the Coulomb barrier (B) make possible the understanding of limits and possible improvement of a previous optical model potential (OMP) for alpha-particles on nuclei within the mass number range 45<A<209 [M. Avrigeanu et al., Phys. Rev. C 82, 014606 (2010)]. An updated version of this potential is given in the present work concerning mainly an increased surface imaginary potential depth well below B for A>130. Moreover, underestimation of reaction cross sections for well-deformed nuclei is removed by using ~7% larger radius for the surface imaginary part of this spherical OMP. Improved input parameters based on recent independent data, particularly gamma-ray strength functions, but no empirical rescaling factor of the gamma and/or neutron widths have been involved within statistical model calculation of the corresponding (alpha,x) reaction cross sections.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-06-06T12:06:11.000Z",
      "title": "Enhanced alpha-particle optical model potential at low energies, for the mass range $A\\sim45$-$209$",
      "abstract": "The recent high--precision measurements of $\\alpha$-particle induced reaction data below the Coulomb barrier make possible the understanding of actual limits and possible improvement of the $\\alpha$-particle optical--model potentials. An updated optical potential is thus provided for $\\alpha$-particles on nuclei within the mass number range $45\\leq A\\leq 209$, below the Coulomb barrier ($B$). The main revision concerns actually only the surface imaginary potential depth at the lowest $\\alpha$-particle energies well below $B$, and in fact only for the mass range above $A\\sim130$. A further regional point is the underestimation of reaction cross sections for the rare--earth nuclei by using the spherical optical potential unless a 7% larger values of the surface imaginary potential radius is taken into account.",
      "comment": "10 pages, 9 figures. Submitted to PRC on April 20, 2014",
      "journal": null,
      "doi": null
    },
    {
      "version": "v2",
      "updated": "2014-10-28T09:20:19.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "24.10.Ht",
      "24.60.Dr",
      "25.55.-e",
      "27.70.+q"
    ],
    "keywords": [
      "enhanced alpha-particle optical model potential",
      "mass range",
      "low energies",
      "surface imaginary potential radius",
      "coulomb barrier"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevC.90.044612",
      "journal": "Physical Review C",
      "year": 2014,
      "month": "Oct",
      "volume": 90,
      "number": 4,
      "pages": "044612"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1299591,
      "adsabs": "2014PhRvC..90d4612A"
    }
  }
}