{
  "annotation_id": "19228428-7fdc-4aa5-ad93-05956b4424c5",
  "date_created": "2026-03-02T18:00:08.551000Z",
  "date_modified": "2026-03-02T18:00:08.551000Z",
  "file_hash": "7d5b99fd5ec917bbd24c2cf48c2c44e5d6f2eec7441e3399a5eab7ea5f11060a",
  "private": false,
  "record": {
    "abstract": "The quasiparticle time blocking approximation (QTBA) is applied to describe\nE1 excitations in the even-even tin isotopes. Within the model pairing\ncorrelations, two-quasiparticle (2q), and 2q*phonon configurations are\nincluded. Thus the QTBA is an extension of the quasiparticle random phase\napproximation to include quasiparticle-phonon coupling. Calculational formulas\nare presented in case of neutral excitations in the spherically symmetric\nsystem. The main equations are written in the coordinate representation that\nallows to take into account single-particle continuum completely. The E1\nphotoabsorption cross sections have been calculated in nuclei 116,120,124Sn. It\nhas been obtained that the 2q*phonon configurations provide noticeable\nfragmentation of the giant dipole resonance resulting in appearance of\nsignificant spreading width. The results are compared with available\nexperimental data.",
    "arxiv_id": "nucl-th/0512030",
    "authors": [
      "E. V. Litvinova",
      "V. I. Tselyaev"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.75.054318",
    "title": "Description of electric dipole excitations in the tin isotopes within   the quasiparticle time blocking approximation",
    "url": "https://arxiv.org/abs/nucl-th/0512030"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a6d91678-c026-4026-9166-2c2c5706c6eb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}