{
  "id": "2103.09392",
  "version": "v1",
  "published": "2021-03-17T01:38:13.000Z",
  "updated": "2021-03-17T01:38:13.000Z",
  "title": "Sensitivity of Neutron-Rich Nuclear Isomer Behavior to Uncertainties in Direct Transitions",
  "authors": [
    "G. Wendell Misch",
    "Trevor M. Sprouse",
    "Matthew R. Mumpower",
    "Aaron Couture",
    "Chris L. Fryer",
    "Bradley S. Meyer",
    "Yang Sun"
  ],
  "comment": "52 pages, 13 figures, 2 tables",
  "categories": [
    "astro-ph.HE",
    "nucl-th"
  ],
  "abstract": "Nuclear isomers are populated in the rapid neutron capture process (r process) of nucleosynthesis. The r process may cover a wide range of temperatures, potentially starting from several tens of GK (several MeV) and then cooling as material is ejected from the event. As the r-process environment cools, isomers can freeze out of thermal equilibrium or be directly populated as astrophysical isomers (astromers). Two key behaviors of astromers -- ground state<->isomer transition rates and thermalization temperatures -- are determined by direct transition rates between pairs of nuclear states. We perform a sensitivity study to constrain the effects of unknown transitions on astromer behavior. We also introduce a categorization of astromers that describes their potential effects in hot environments. We provide a table of neutron-rich isomers that includes the astromer type, thermalization temperature, and key unmeasured transition rates.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-03-17T01:38:13.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "neutron-rich nuclear isomer behavior",
      "sensitivity",
      "thermalization temperature",
      "rapid neutron capture process",
      "uncertainties"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 52,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}