{
  "annotation_id": "78930133-dbc5-4b03-8754-b4263cf169c1",
  "date_created": "2026-03-02T18:00:18.662000Z",
  "date_modified": "2026-03-02T18:00:18.662000Z",
  "file_hash": "6c8f0309876635d421d4c989bb1012ea6bccb435b850f35d9bd1de15a29eaf82",
  "private": false,
  "record": {
    "abstract": "The influence of the energy dependence of the free NN t-matrix on the optical\npotential of nucleon-nucleus elastic scattering is investigated within the\ncontext of a full-folding model based on the impulse approximation. The\ntreatment of the pole structure of the NN t-matrix, which has to be taken into\naccount when integrating to negative energies is described in detail. We\ncalculate proton-nucleus elastic scattering observables for $^{16}$O,\n$^{40}$Ca, and $^{208}$Pb between 65 and 200 MeV laboratory energy and study\nthe effect of the energy dependence of the NN t-matrix. We compare this result\nwith experiment and with calculations where the center-of-mass energy of the NN\nt-matrix is fixed at half the projectile energy. It is found that around 200\nMeV the fixed energy approximation is a very good representation of the full\ncalculation, however deviations occur when going to lower energies (65 MeV).",
    "arxiv_id": "nucl-th/9708010",
    "authors": [
      "Ch. Elster",
      "S. P. Weppner"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.57.189",
    "journal_ref": "Phys.Rev.C57:189,1998",
    "title": "Energy Dependence of the NN t-matrix in the Optical Potential for   Elastic Nucleon-Nucleus Scattering",
    "url": "https://arxiv.org/abs/nucl-th/9708010"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "24f3b2a6-2683-4566-9e01-ca257ab3b3b3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}