{
  "abstract": "Thermal neutron-induced fission of $^{235}$U is studied using a six-dimensional Langevin approach based on the Cassini shape parametrization. Scission events are classified into Asymmetric 1 (AS1), Asymmetric 2 (AS2), and Superlong (SL) fission modes by applying the $k$-means algorithm to the fragment mass and the quadrupole deformations of both fragments. For each mode, proton and neutron single-particle levels are calculated for representative fragments to examine their shell structures. The AS1 heavy fragment exhibits proton gaps at $Z=50$ and 52 and neutron gaps at $N=82$ and 84, whereas well-developed gaps appear at $Z=56$ and $N=88$ in the AS2 heavy fragment. The mass splits of AS1 and AS2 are close to those of the conventional Standard I and Standard II modes, respectively. However, the average total kinetic energy is lower for AS1 than for AS2, opposite to the conventional ordering of Standard I and Standard II. This reversal reflects the more elongated shape of the AS1 light fragment. The SL mode is conventionally interpreted in terms of macroscopic liquid-drop effects, whereas the pronounced proton shell gap at $Z=46$ suggests that proton shell effects also contribute to the elongated symmetric configuration. The classification based on fragment mass and the quadrupole deformations of both fragments provides a basis for distinguishing fission modes and examining the corresponding fragment shell structures at scission.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.11103",
  "author_total": 4,
  "authors": [
    {
      "name": "K Okada"
    },
    {
      "name": "K Nishio"
    },
    {
      "name": "T Wada"
    },
    {
      "name": "N Carjan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/crna5efvhztmp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.11103",
  "fulltext_url": null,
  "id": "crna5efvhztmp",
  "issns": [],
  "landing_url": "https://hal.science/hal-05761988v1",
  "language": "en",
  "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"
    ],
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.nucl"
    ],
    [
      "openalex",
      "3106|Nuclear physics research studies"
    ]
  ],
  "openalex": "W7212309471",
  "pdf_url": "https://arxiv.org/pdf/2609.11103",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-10",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/crna5efvhztmp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:40Z",
      "native_id": "hal-05761988",
      "source": "hal",
      "url": "https://hal.science/hal-05761988v1"
    },
    {
      "first_seen": "2026-10-30T12:20:26Z",
      "native_id": "2609.11103",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.11103"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Classification of fission modes in $^{236}$U using a six-dimensional Langevin approach",
  "title_text": "Classification of fission modes in ^236U using a six-dimensional Langevin approach",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:26Z",
  "url": "https://research.draconitic.com/paper/crna5efvhztmp",
  "venue": "HAL",
  "versions": []
}