{
  "id": "nucl-th/9708010",
  "version": "v1",
  "published": "1997-08-07T23:19:38.000Z",
  "updated": "1997-08-07T23:19:38.000Z",
  "title": "Energy Dependence of the NN t-matrix in the Optical Potential for Elastic Nucleon-Nucleus Scattering",
  "authors": [
    "Ch. Elster",
    "S. P. Weppner"
  ],
  "comment": "11 pages (revtex), 6 postscript figures",
  "journal": "Phys.Rev.C57:189,1998",
  "doi": "10.1103/PhysRevC.57.189",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The influence of the energy dependence of the free NN t-matrix on the optical potential of nucleon-nucleus elastic scattering is investigated within the context of a full-folding model based on the impulse approximation. The treatment of the pole structure of the NN t-matrix, which has to be taken into account when integrating to negative energies is described in detail. We calculate proton-nucleus elastic scattering observables for $^{16}$O, $^{40}$Ca, and $^{208}$Pb between 65 and 200 MeV laboratory energy and study the effect of the energy dependence of the NN t-matrix. We compare this result with experiment and with calculations where the center-of-mass energy of the NN t-matrix is fixed at half the projectile energy. It is found that around 200 MeV the fixed energy approximation is a very good representation of the full calculation, however deviations occur when going to lower energies (65 MeV).",
  "revisions": [
    {
      "version": "v1",
      "updated": "1997-08-07T23:19:38.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "energy dependence",
      "elastic nucleon-nucleus scattering",
      "optical potential",
      "free nn t-matrix",
      "mev laboratory energy"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. C"
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 446929
    }
  }
}