{
  "abstract": "High-resolution in-beam $γ$-ray spectroscopy of $^{53}$Ca was performed at the Radioactive Isotope Beam Factory (RIBF) at RIKEN. Excited states in $^{53}$Ca were populated via one-neutron and one-proton removal reactions from a $^{55}$Sc radioactive beam, and the emitted $γ$ rays were detected using the HiCARI hybrid germanium detector array. The lifetime of the first excited $5/2^{-}$ state in $^{53}$Ca was measured for the first time through an analysis of Doppler-roadened $γ$-ray line shapes arising from relativistic recoil velocities. A lifetime of $τ = 11.3_{-11.3}^{+5.3(stat)+3(sys)}$ ps was deduced, corresponding to a reduced transition probability of $B(E2;5/2^{-}{\\rightarrow}1/2^{-}) > 2.6 e^{2}fm^{4}$ at the 1$σ$ level, with a best-fit value of $4.5 e^{2}fm^{4}$. The measured transition strength is compared with state-of-the-art shell-model and ab initio calculations, providing a stringent benchmark for shell-model Hamiltonians and effective charges and modern ab initio descriptions of the neutron-rich calcium isotopes approaching the potential $N$ = 40 shell closure.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.23754",
  "author_total": 39,
  "authors": [
    {
      "name": "S. Chen"
    },
    {
      "name": "M. Petri"
    },
    {
      "name": "S. Paschalis"
    },
    {
      "name": "H. L. Crawford"
    },
    {
      "name": "P. Doornenbal"
    },
    {
      "name": "R. Taniuchi"
    },
    {
      "name": "K. Wimmer"
    },
    {
      "name": "B. A. Brown"
    },
    {
      "name": "J. D. Holt"
    },
    {
      "name": "B. S. Hu"
    },
    {
      "name": "T. Miyagi"
    },
    {
      "name": "T. Otsuka"
    },
    {
      "name": "Y. Tsunoda"
    },
    {
      "name": "N. Aoi"
    },
    {
      "name": "H. Baba"
    },
    {
      "name": "M. Bentley"
    },
    {
      "name": "F. Browne"
    },
    {
      "name": "C. Campbell"
    },
    {
      "name": "Z. Chen"
    },
    {
      "name": "R. Crane"
    },
    {
      "name": "H. de Witte"
    },
    {
      "name": "P. Fallon"
    },
    {
      "name": "C. Fransen"
    },
    {
      "name": "H. Hess"
    },
    {
      "name": "E. Ideguchi"
    },
    {
      "name": "S. Iwazaki"
    },
    {
      "name": "J. Kim"
    },
    {
      "name": "A. Kohda"
    },
    {
      "name": "T. Koiwai"
    },
    {
      "name": "W. Marshall"
    },
    {
      "name": "B. Mauss"
    },
    {
      "name": "B. Moon"
    },
    {
      "name": "T. Parry"
    },
    {
      "name": "P. Reiter"
    },
    {
      "name": "H. Sakurai"
    },
    {
      "name": "D. Suzuki"
    },
    {
      "name": "L. Tetley"
    },
    {
      "name": "S. Thiel"
    },
    {
      "name": "Y. Yamamoto"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a9s1ch7zjps7x.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.23754",
  "fulltext_url": null,
  "id": "a9s1ch7zjps7x",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.23754",
  "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"
    ],
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3106|Nuclear physics research studies"
    ]
  ],
  "openalex": "W7213995729",
  "pdf_url": "https://arxiv.org/pdf/2609.23754",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/a9s1ch7zjps7x.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.23754",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.23754"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-ex",
      "subfield": "nuclear"
    }
  ],
  "title": "Electromagnetic transition strength in $^{53}$Ca: the lifetime of the $5/2^{-}$ state",
  "title_text": "Electromagnetic transition strength in ^53Ca: the lifetime of the 5/2^− state",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/a9s1ch7zjps7x",
  "venue": "arXiv",
  "versions": []
}