{
  "annotation_id": "c0b2d42c-bca3-49a8-a853-938cd13b0d53",
  "date_created": "2026-03-02T18:00:17.789000Z",
  "date_modified": "2026-03-02T18:00:17.789000Z",
  "file_hash": "1c58f68d6fa633bd81d4b0a8f374de5e0a129603ade00a2659e13d980fefce71",
  "private": false,
  "record": {
    "abstract": "A nonstandard method for calculating the nuclear $2\\nu\\beta\\beta$ - decay\namplitude is proposed. The method is based on the explicit use of those\napproximate symmetries of a nuclear hamiltonian, which correspond to the\noperators of allowed $\\beta$ -- transitions. Within the framework of the\nproposed method the mentioned amplitude is calculated for a wide range of\nnuclei. The model parameters used in calculations are taken from independent\ndata. Calculated \\bb half-lifes are compared with known experimental data.",
    "arxiv_id": "nucl-th/9608051",
    "authors": [
      "O. A. Rumyantsev",
      "M. H. Urin"
    ],
    "categories": [
      "nucl-th"
    ],
    "journal_ref": "Bull.Russ.Acad.Sci.Phys. 60 (1996) 1682-1690; Izv.Ross.Akad.Nauk\n  Ser.Fiz. 60 (1996) 18-30",
    "title": "Approximate symmetries in nuclei and the $2\\nu\\beta\\beta$-decay rate",
    "url": "https://arxiv.org/abs/nucl-th/9608051"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e58c2c1e-8d64-4c8c-9646-79e048025166",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}