{
  "abstract": "A model for $β$-delayed neutron emission is presented in which the emission of neutrons is allowed to occur before states populated in $β^-$ decay have reached equilibrium in the so-called \"compound nucleus\" picture. The pre-equilibrium neutron spectra are computed using a two-component exciton model, where neutron and proton, particle and hole degrees of freedom are treated independently. This model is implemented in the code BeoH to supplement the existing Hauser-Feshbach model for statistical decay of compound-nucleus states. The effect of a pre-equilibrium component in the total neutron spectrum on the single- and multi-neutron emission probabilities $P_{xn}$ is investigated for $β$-decay precursor nuclei in the regions $47\\leq Z\\leq 49,~83\\leq N\\leq 86$ and $54\\leq Z\\leq 58,~N=125,126$. An absolute change in the $P_{xn}$ values of up to 5-10% is observed in the $N=126$ region when including pre-equilibrium emission compared to the values predicted by the Hauser-Feshbach model alone.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.00761",
  "author_total": 4,
  "authors": [
    {
      "name": "Nico Braukman"
    },
    {
      "name": "Toshihiko Kawano"
    },
    {
      "name": "Robert Grzywacz"
    },
    {
      "name": "Zhengyu Xu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/50esxb1gd97m9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.00761",
  "fulltext_url": null,
  "id": "50esxb1gd97m9",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.00761",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3106|Nuclear physics research studies"
    ]
  ],
  "openalex": "W7216527570",
  "pdf_url": "https://arxiv.org/pdf/2610.00761",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/50esxb1gd97m9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:03Z",
      "native_id": "2610.00761",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.00761"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "A Two-Component Exciton Model for $β$-Delayed Neutron Emission",
  "title_text": "A Two-Component Exciton Model for β-Delayed Neutron Emission",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:03Z",
  "url": "https://research.draconitic.com/paper/50esxb1gd97m9",
  "venue": "arXiv",
  "versions": []
}