{
  "annotation_id": "2b28eeed-0f69-4507-98b0-3890fa8a21be",
  "date_created": "2026-03-02T18:01:11.169000Z",
  "date_modified": "2026-03-02T18:01:11.169000Z",
  "file_hash": "c5cb116787d0044fe097174678336bacacabda825a36ac4c8bcfceb768bf73a7",
  "private": false,
  "record": {
    "abstract": "Excitation energies of the ns_{1/2} (n=7-10), np_j (n=7-9), nd_j (n=6-8),\nnf_{j} (n=5-7), and ng_{j} (n=5-6) states in Th IV are evaluated. First-,\nsecond-, third-, and all-order Coulomb energies and first- and second-order\nCoulomb-Breit energies are calculated. Reduced matrix elements, oscillator\nstrengths, transition rates, and lifetimes are determined for the 96 possible\nnl_j-n\u0027l\u0027_j\u0027 electric-dipole transitions. Multipole matrix elements\n(7s_{1/2}-6d_j, 7s_{1/2}-5f_j, and 5f_{5/2}-5f_{7/2}) are evaluated to obtain\nthe lifetimes of the $5f_{7/2}$ and 7s_{1/2}$ states. Matrix elements are\ncalculated using both relativistic many-body perturbation theory, complete\nthrough third order, and a relativistic all-order method restricted to single\nand double (SD) excitations. Scalar and tensor polarizabilities for the\n5f_{5/2} ground state in Th3+ are calculated using relativistic third-order and\nall-order methods. These calculations provide a theoretical benchmark for\ncomparison with experiment and theory.",
    "arxiv_id": "physics/0608182",
    "authors": [
      "U. I. Safronova",
      "W. R. Johnson",
      "M. S. Safronova"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevA.74.042511",
    "title": "Excitation energies, polarizabilities, multipole transition rates, and   lifetimes in Th IV",
    "url": "https://arxiv.org/abs/physics/0608182"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ee126f31-e1b3-4019-b91e-a1cb001e62ce",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}