{
  "annotation_id": "48667dff-3017-4051-bff0-4570d60ebca9",
  "date_created": "2026-03-02T18:00:15.315000Z",
  "date_modified": "2026-03-02T18:00:15.315000Z",
  "file_hash": "de3103ec0f277737736ece9bb77f332c3c5acaee601caf58b16dfcc43fb9634c",
  "private": false,
  "record": {
    "abstract": "The structure of the mirror nuclei $^9$Be and $^9$B is studied in a\nmicroscopic $\\alpha+ \\alpha+ n$ and $\\alpha+ \\alpha+ p$ three-cluster model\nusing a fully antisymmetrized 9-nucleon wave function. The two-nucleon\ninteraction includes central and spin-orbit components and the Coulomb\npotential. The ground state of $^9$Be is obtained accurately with the\nstochastic variational method, while several particle-unbound states of both\n$^9$Be and $^9$B are investigated with the complex scaling method.The\ncalculation for $^9$Be supports the recent identification for the existence of\ntwo broad states around 6.5 MeV, and predicts the $\\frac{3}{2}^{-}_2$ and\n$\\frac{5}{2}^{-}_2$ states at about 4.5 MeV and 8 MeV, respectively. The\nsimilarity of the calculated spectra of $^9$Be and $^9$B enables one to\nidentify unknown spins and parities of the $^9$B states. Available data on\nelectromagnetic moments and elastic electron scatterings are reproduced very\nwell. The enhancement of the $E$1 transition of the first excited state in\n$^9$Be is well accounted for. The calculated density of $^9$Be is found to\nreproduce the reaction cross section on a Carbon target. The analysis of the\nbeta decay of $^9$Li to $^9$Be clearly shows that the wave function of $^9$Be\nmust contain a small component that cannot be described by the simple $\\alpha+\n\\alpha+ n$ model. This small component can be well accounted for by extending a\nconfiguration space to include the distortion of the $\\alpha$-particle to $t+p$\nand $h+n$ partitions.",
    "arxiv_id": "nucl-th/9604009",
    "authors": [
      "K. Arai",
      "Y. Ogawa",
      "Y. Suzuki",
      "K. Varga"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.54.132",
    "journal_ref": "Phys.Rev.C54:132-146,1996",
    "title": "Structure of the mirror nuclei $^9$Be and $^9$B in a microscopic cluster   model",
    "url": "https://arxiv.org/abs/nucl-th/9604009"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e75f8aa7-dc8f-4fb0-b69e-2e59e35cd874",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}