{
  "abstract": "We report thick target yields of $^{65}{\\rm Cu}(α,n)^{68}{\\rm Ga}$ from $α$ energies $E_α$$=$6.5--8~MeV measured via neutron-counting at the Edwards Accelerator Laboratory at Ohio University. Our results agree with prior results based on single-foil irradiations, while disagreeing with thick-target yields inferred from stacked-foil irradiations by up to an order of magnitude. Based on comparisons of our and prior measurements to Hauser-Feshbach calculations, we estimate the thick-target yield for $^{68}{\\rm Ga}$ from $E_α$=14~MeV impinging on 100\\%-enriched copper ($^{65}{\\rm Cu}$) is 161$^{+5}_{-24}$~MBq/$μ$Ah (for He$^{++}$), which is in agreement with the current IAEA estimate of 156~MBq/$μ$Ah. At $E_α$$=$8~MeV, where radioimpurity-free production of $^{68}{\\rm Ga}$ could be realized with a natural copper target, our yield estimate is nearly 4$\\times$ lower than the IAEA estimate. We find that the $^{65}{\\rm Cu}(α,n)$ cross section estimates presently employed for neutrino and dark matter detector backgrounds and the $^{65}{\\rm Cu}(α,n)$ astrophysical reaction rate recently recommended for nucleosynthesis calculations are in agreement with our measurement results.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.01719",
  "author_total": 11,
  "authors": [
    {
      "name": "Zach Meisel"
    },
    {
      "name": "Gula Hamad"
    },
    {
      "name": "Kristyn Brandenburg"
    },
    {
      "name": "Carl R. Brune"
    },
    {
      "name": "Don E. Carter"
    },
    {
      "name": "Joseph Derkin"
    },
    {
      "name": "Yenuel Jones-Alberty"
    },
    {
      "name": "Tom N. Massey"
    },
    {
      "name": "Doug Soltesz"
    },
    {
      "name": "Shiv K. Subedi"
    },
    {
      "name": "Alexander V. Voinov"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3mxa3ms2khng1.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.01719",
  "fulltext_url": null,
  "id": "3mxa3ms2khng1",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.01719",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "nucl-ex"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.01719",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3mxa3ms2khng1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:03Z",
      "native_id": "2610.01719",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.01719"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-ex",
      "subfield": "nuclear"
    }
  ],
  "title": "Thick-target Yield of $^{65}$Cu($α,n)^{68}$Ga Near Threshold and Implications for Nuclear Medicine, Deep Underground Detector Backgrounds, and Nucleosynthesis",
  "title_text": "Thick-target Yield of ^65Cu(α,n)^68Ga Near Threshold and Implications for Nuclear Medicine, Deep Underground Detector Backgrounds, and Nucleosynthesis",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:03Z",
  "url": "https://research.draconitic.com/paper/3mxa3ms2khng1",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1016/j.apradiso.2026.112956",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}