{
  "abstract": "Nucleon scattering off strongly deformed nuclei such as the actinides requires coupled-channels (CC) calculations in which several members of the ground-state rotational band are coupled explicitly, which makes Bayesian uncertainty quantification of deformed global optical potentials costly. We reformulate the direct boundary matching method (DBMM) by imposing its outgoing-wave boundary condition through a generalized Bloch operator; the resulting Bloch-DBMM solver converges as fast as the modern R-matrix method and extends to charged projectiles on targets with deformed charge distributions. On top of it we build a reduced-basis emulator, CCB-ROM, whose basis vectors span all channels of a $J^π$ block simultaneously, and generalize the coupled-channels empirical interpolation method to arbitrary non-affine deformed interactions. For $n,p+{}^{232}$Th inelastic scattering with the ground-state band coupled through the $8^+$ state, at 4 and 35 MeV, the Bloch-DBMM solver is benchmarked against Frescox, and the emulator replaces a 2700-dimensional system by one of dimension $N_b\\le200$, with a cost of $\\mathcal{O}(N_b^3)$ independent of the number of channels, reproducing the exact solver calculations for all five band members with speed-ups of over two orders of magnitude. CCB-ROM thus delivers differential cross sections, transmission coefficients and reaction cross sections from one calculation, at a cost compatible with Bayesian calibration of deformed optical potentials for neutrons and protons alike, and extends naturally to closed channels and to compound-nucleus reaction codes.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.03910",
  "author_total": 4,
  "authors": [
    {
      "name": "M. Catacora-Rios"
    },
    {
      "name": "Kyle Beyer"
    },
    {
      "name": "Jin Lei"
    },
    {
      "name": "Filomena Nunes"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8b7j28znwypz1.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.03910",
  "fulltext_url": null,
  "id": "8b7j28znwypz1",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.03910",
  "language": null,
  "licence": "CC-BY-NC-SA-4.0",
  "licence_label": "CC BY-NC-SA 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3106|Nuclear physics research studies"
    ]
  ],
  "openalex": "W7220704375",
  "pdf_url": "https://arxiv.org/pdf/2610.03910",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8b7j28znwypz1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:01Z",
      "native_id": "2610.03910",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.03910"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Emulation of coupled-channels scattering for strongly deformed nuclei",
  "title_text": "Emulation of coupled-channels scattering for strongly deformed nuclei",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:01Z",
  "url": "https://research.draconitic.com/paper/8b7j28znwypz1",
  "venue": "arXiv",
  "versions": []
}