{
  "annotation_id": "8d826029-e3b5-4bd3-ba67-7b5e49669269",
  "date_created": "2026-03-02T18:00:04.613000Z",
  "date_modified": "2026-03-02T18:00:04.613000Z",
  "file_hash": "3909608115d9f6a23a6b01bf34e8ecb23a7789dda3f0f41ef3c1647e121f57f1",
  "private": false,
  "record": {
    "abstract": "We study Fermi transitions and isospin mixing in an isotopic chain 70-78 Kr\nconsidering various approximations that use the same Skyrme-Hartree-Fock single\nparticle basis. We study Coulomb effects as well as the effect of BCS and\nquasiparticle random phase approximation (QRPA) correlations. A measure of\nisospin mixing in the approximate ground state is defined by means of the\nexpectation value of the isospin operator squared in N=Z nuclei (which is\ngeneralized to N different from Z nuclei). Starting from strict Hartree-Fock\napproach without Coulomb, it is shown that the isospin breaking is negligible,\non the order of a few per thousand for (N-Z)=6, increasing to a few percent\nwith Coulomb. Pairing correlations induce rather large isospin mixing and Fermi\ntransitions of the forbidden type (beta- for N\u003cZ, and beta+ for N\u003eZ). The\nenhancement produced by BCS correlations is compensated to a large extent by\nQRPA correlations induced by isospin conserving residual interactions that tend\nto restore isospin symmetry.",
    "arxiv_id": "nucl-th/0502086",
    "authors": [
      "R. Alvarez-Rodriguez",
      "E. Moya de Guerra",
      "P. Sarriguren"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.71.044308",
    "journal_ref": "Phys.Rev. C71 (2005) 044308",
    "title": "Isospin mixing and Fermi transitions: Selfconsistent deformed mean field   calculations and beyond",
    "url": "https://arxiv.org/abs/nucl-th/0502086"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5ecacc92-20c8-4b28-a2e3-09899a41df77",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}