{
  "abstract": "MARVEL's first direct observation of Migdal ionization in neutron scattering marks an experimental milestone and opens a new avenue for probing electronic response to nuclear recoil. Hydrogen, both the simplest atom and a constituent of its molecular target, provides a controlled benchmark. Within the nonrelativistic sudden approximation, we compute its energy-differential and integrated ionization probabilities with the full recoil phase. At the recoil parameter $β\\equiv v_N/(αc)=1.04$, the full-to-dipole spectral ratio rises from $0.43$ when the emitted-electron energy is $1\\%$ of the hydrogen binding energy to $5.0$ when it is $2.3$ times that energy. Near $β=10$, partial waves with orbital angular momentum $\\ell\\ge3$ carry more than $90\\%$ of the calculated continuum probability. An independent bound-state-closure evaluation verifies the absolute normalization: at eight recoil values, its ionization probabilities agree with the continuum-integrated results to relative discrepancies below $4.4\\times10^{-7}$. These results extend the hydrogen dipole response to the fast-neutron regime and establish energy and angular-momentum redistribution as linked consequences of resolving the recoil phase across an atom.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.23330",
  "author_total": 5,
  "authors": [
    {
      "name": "Haoyang Li"
    },
    {
      "name": "Zeyu Li"
    },
    {
      "name": "Ning Liu"
    },
    {
      "name": "Chuan-Yang Xing"
    },
    {
      "name": "Bin Zhu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cp3k3ev0qvb5v.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.23330",
  "fulltext_url": null,
  "id": "cp3k3ev0qvb5v",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.23330",
  "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",
      "hep-ph"
    ],
    [
      "arxiv",
      "physics.atom-ph"
    ],
    [
      "openalex",
      "3107|Atomic and Molecular Physics"
    ]
  ],
  "openalex": "W7214040362",
  "pdf_url": "https://arxiv.org/pdf/2609.23330",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/cp3k3ev0qvb5v.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.23330",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.23330"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.atom-ph",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Energy and Angular-Momentum Redistribution in Hydrogen Migdal Ionization",
  "title_text": "Energy and Angular-Momentum Redistribution in Hydrogen Migdal Ionization",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/cp3k3ev0qvb5v",
  "venue": "arXiv",
  "versions": []
}