{
  "annotation_id": "737bb4e2-cac2-4c15-bcc8-d5c7416d1b44",
  "date_created": "2026-03-02T18:00:18.782000Z",
  "date_modified": "2026-03-02T18:00:18.782000Z",
  "file_hash": "971ae1ef5449228bae960224c8cba063fd6b7cbabddb007ce04d8fca51def28e",
  "private": false,
  "record": {
    "abstract": "The electromagnetic excitation of the two-phonon isovector giant dipole\nresonance in relativistic projectiles incident on heavy targets can be proceed\nvia several intermediate $1^-$ one-phonon giant resonance states. In two step\nelectric dipole transitions the population of $0^+$, $1^+$, and $2^+ $\ntwo-phonon states are possible. We calculate the amplitude distribution of\n$1^-$ excitations with an RPA formalism, and use it to calculate the\nelectromagnetic excitation of two-phonon states in second order perturbation\ntheory and coupled-channels. We show that a conspiracy between angular momentum\ncoupling and the strength of the electromagnetic fields suppresses\ncontributions of $1^+$ states to the total cross sections.",
    "arxiv_id": "nucl-th/9606004",
    "authors": [
      "C. A. Bertulani",
      "V. Yu. Ponomarev",
      "V. V. Voronov"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/S0370-2693(96)01204-X",
    "journal_ref": "Phys.Lett. B388 (1996) 457-461",
    "title": "Quenching of $1^+$ excitations in the double giant resonance",
    "url": "https://arxiv.org/abs/nucl-th/9606004"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "65a18aa9-72b4-4308-8ede-1fa5cdad83d2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}