{
  "annotation_id": "6376d284-808d-4914-ba06-7f000c001d02",
  "date_created": "2026-03-02T18:00:01.018000Z",
  "date_modified": "2026-03-02T18:00:01.018000Z",
  "file_hash": "3c2c746ebd716f0d2f887371dd499d0a10edca3c85f00f7f754eb7ac2fe8705f",
  "private": false,
  "record": {
    "abstract": "The dynamics of nuclear collective motion is investigated in the case of\nreflection-asymmetric shapes. The model is based on a new parameterization of\nthe octupole and quadrupole degrees of freedom, valid for nuclei close to the\naxial symmetry. Amplitudes of oscillation in other degrees of freedom different\nfrom the axial ones are assumed to be small, but not frozen to zero. The case\nof nuclei which already possess a permanent quadrupole deformation is discussed\nin some more detail and a simple solution is obtained at the critical point of\nthe phase transition between harmonic octupole oscillation and a permanent\nasymmetric shape. The results are compared with experimental data of the\nThorium isotopic chain. The isotope Th-226 is found to be close to the critical\npoint.",
    "arxiv_id": "nucl-th/0409031",
    "authors": [
      "P. G. Bizzeti",
      "A. M. Bizzeti-Sona"
    ],
    "categories": [
      "nucl-th",
      "nucl-ex"
    ],
    "doi": "10.1103/PhysRevC.70.064319",
    "journal_ref": "Phys.Rev. C70 (2004) 064319",
    "title": "Description of nuclear octupole and quadrupole deformation close to the   axial symmetry and phase transitions in the octupole mode",
    "url": "https://arxiv.org/abs/nucl-th/0409031"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fcb122f8-22ea-417f-846f-bfcce97324f9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}