{
  "abstract": "Large-area plastic scintillation detectors are widely used in radiation portal monitors, but their Compton-dominated spectra provide limited radionuclide-specific information. We evaluated backward cumulative channel sum (BCCS) combined with non-negative least-squares (NNLS) decomposition and compared it with raw-spectrum NNLS using an explicit background template and detector-specific five-window NNLS. A measured background and fixed reference spectra for Am-241, Cs-137, and Co-60 were used to analyze 18 independent spectra: nine single-radionuclide measurements, eight binary mixtures, and one ternary mixture. The mixed-source compositions were concealed during the primary BCCS analysis. All three methods ranked the actual radionuclide first for every single-radionuclide spectrum and the two constituents first and second for every binary mixture; the ternary mixture yielded positive coefficients for all three radionuclides. For the nine mixed-source spectra, method-specific relative residuals were 0.48–1.31% for BCCS-NNLS, 0.88–1.60% for raw-spectrum NNLS, and 0.11–0.50% for five-window NNLS; these values were calculated in different representation spaces and should not be compared as equivalent goodness-of-fit measures. Parametric Poisson resampling supported stable coefficient rankings under counting-statistical variation. These results support BCCS-NNLS as a simple, linear, and interpretable approach for static, unshielded measurements within a fixed radionuclide library, without hardware modification or data-intensive training. The study does not address open-set identification, activity quantification, or formal detection limits.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "name": "Ji-Yong So"
    },
    {
      "name": "Byoungil Jeon"
    },
    {
      "name": "Myungkook Moon"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bbrnw21vnxq70.bib",
  "cited_by": 0,
  "doi": "10.1038/s41598-026-75400-8",
  "fulltext_url": null,
  "id": "bbrnw21vnxq70",
  "issns": [
    "2045-2322"
  ],
  "landing_url": "https://www.nature.com/articles/s41598-026-75400-8",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3108|Radiation Detection and Scintillator Technologies"
    ]
  ],
  "openalex": "W7160198293",
  "pdf_url": "https://www.nature.com/articles/s41598-026-75400-8_reference.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-17",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/bbrnw21vnxq70.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:30Z",
      "native_id": "10.1038/s41598-026-75400-8",
      "source": "crossref",
      "url": "https://www.nature.com/articles/s41598-026-75400-8"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3108|Radiation Detection and Scintillator Technologies",
      "subfield": "applied-instrumentation"
    }
  ],
  "title": "Radionuclide identification for plastic scintillation detectors by backward cumulative channel sum",
  "title_text": "Radionuclide identification for plastic scintillation detectors by backward cumulative channel sum",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:30Z",
  "url": "https://research.draconitic.com/paper/bbrnw21vnxq70",
  "venue": "Scientific Reports",
  "versions": []
}