{
  "annotation_id": "c6d89cb9-0404-4c77-a234-144097a4f49c",
  "date_created": "2026-03-02T18:00:00.606000Z",
  "date_modified": "2026-03-02T18:00:00.606000Z",
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  "record": {
    "abstract": "We note that the same mathematical results apply to problems involving\nquasispin and isospin, but the problems per se are different. In the quasispin\ncase, one deals with a system of identical fermions (e.g. neutrons) and address\nthe problem of how many seniority conserving interactions there are. In the\nisospin case, one deals with a system of both neutrons and protons and the\nproblem in question is the number of neutron-proton pairs with a given total\nangular momentum. Other companion problems are also discussed.",
    "arxiv_id": "nucl-th/0410031",
    "authors": [
      "Larry Zamick",
      "Alberto Escuderos"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.71.014315",
    "journal_ref": "Phys.Rev. C71 (2005) 014315",
    "title": "Companion problems in quasispin and isospin",
    "url": "https://arxiv.org/abs/nucl-th/0410031"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6ae71c6f-665a-4d2e-a490-ba4fb157af4b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}