{
  "abstract": "We investigate the role of spin-dependent nucleon--nucleus interactions in nuclear reactions. To this end, we use neutron spin observables to constrain the dominant central spin-spin form factors and then apply the corresponding like-channel interactions to near-barrier fusion in the $p+{}^{93}$Nb system. The interactions are constructed within a folding framework based on a finite-range effective nucleon-nucleon force and organized in terms of radial form factors associated with their spin-spin, tensor, and spin-orbit components. Neutron spin observables in the $n$ + $^{27}$Al, $^{59}$Co, and $^{93}$Nb target systems are analyzed within a distorted-wave Born approximation (DWBA) framework {to examine the sign and scale of the central spin-spin contribution and the assembled operator conventions.} The calculation reproduces the observed sign systematics of the neutron spin observables for the three targets, consistent with the dominant central spin-spin contribution in the adopted model. The unlike-channel (neutron--proton) interaction constrained by neutron scattering is then reconstructed for the corresponding like-channel (proton--proton) interaction and applied to a coupled-channels description of near-barrier fusion for the $p+{}^{93}$Nb system. The retained real spin-dependent interactions lead only to a weak modification of the effective barrier and a very small change in the unpolarized fusion cross section within the present model. The present work thus connects the neutron-scattering constraints on the operator conventions with the fusion calculation in the proton channel, and estimates the scale of the corresponding real spin-dependent correction in near-barrier fusion.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.26561",
  "author_total": 3,
  "authors": [
    {
      "name": "Kyoungsu Heo"
    },
    {
      "name": "Myung-Ki Cheoun"
    },
    {
      "name": "Kouichi Hagino"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bshkhzeqn7zwz.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.26561",
  "fulltext_url": null,
  "id": "bshkhzeqn7zwz",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.26561",
  "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": "W7162550682",
  "pdf_url": "https://arxiv.org/pdf/2605.26561",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bshkhzeqn7zwz.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2605.26561",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.26561"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Spin-Dependent Nucleon-Nucleus Interactions Constrained by Neutron Observables and Their Impact on Near-Barrier Proton Fusion",
  "title_text": "Spin-Dependent Nucleon-Nucleus Interactions Constrained by Neutron Observables and Their Impact on Near-Barrier Proton Fusion",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/bshkhzeqn7zwz",
  "venue": "arXiv",
  "versions": []
}