{
  "annotation_id": "65bc52ef-ccdd-4823-84ec-fcbbebd3de4c",
  "date_created": "2026-03-02T18:00:04.867000Z",
  "date_modified": "2026-03-02T18:00:04.867000Z",
  "file_hash": "925ee8aebd7fc512286208c18979bc684b7d2b176b592cd3f073c6121cd53fa8",
  "private": false,
  "record": {
    "abstract": "It is pointed out that the usual threshold anomaly, found operative in the\nenergy behavior of the imaginary and real parts of the optical potential\nrepresenting the elastic scattering of tightly bound nuclei at near- and\nbelow-barrier energies, suffers a drastic qualitative change in the case of the\nelastic scattering of weakly bound nuclei. Owing to the strong coupling to the\nbreakup channel even at sub-barrier energies, the imaginary potential strength\nseems to increase as the energy is lowered down to below the natural, barrier,\nthreshold, accompanied by a decrease in the real potential strength. This\nfeature is consistent with the dispersion relation. The system $^{6}$Li +\n$^{208}$Pb is analyzed to illustrate this new phenomenon.",
    "arxiv_id": "nucl-th/0502011",
    "authors": [
      "M. S. Hussein",
      "P. R. S. Gomes",
      "J. Lubian",
      "L. C. Chamon"
    ],
    "categories": [
      "nucl-th",
      "nucl-ex"
    ],
    "doi": "10.1103/PhysRevC.73.044610 10.1103/PhysRevC.76.019902",
    "journal_ref": "Phys.Rev.C73:044610,2006; Erratum-ibid.C76:019902,2007",
    "title": "Breakup Threshold Anomaly: New Manifestation of the Dispersion Relation",
    "url": "https://arxiv.org/abs/nucl-th/0502011"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3c4f0708-003b-4b8a-8a27-6cdf54e98ccb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}