{
  "abstract": "High-precision quasi-simultaneous collinear and anticollinear laser spectroscopy was performed on the $5s\\,^2S_{1/2}\\rightarrow 5p\\,^2P_{1/2}$ (D1), $5s\\,^2S_{1/2}\\rightarrow 5p\\,^2P_{3/2}$ (D2), and three $4d\\rightarrow 5p$ transitions in the naturally abundant Sr$^+$ isotopes. Absolute transition frequencies were determined with uncertainties as low as $600$ kHz, while common-mode rejection enabled the extraction of isotope shifts with uncertainties down to $200$ kHz, one order of magnitude smaller than previously achieved. The uncertainties of the hyperfine-structure constants of the $5p$ states and the $4d\\,^2D_{3/2}$ state in $^{87}$Sr were also improved. A King-plot analysis yielded a field-shift ratio of the D2 and D1 lines of $F_{\\mathrm{D2}}/F_{\\mathrm{D1}}=1.004(5)$, which lies within the theoretically allowed region and provides a benchmark for atomic-structure calculations. Using data from all stable isotopes and investigated transitions, we compare field- and mass-shift constants obtained using several established approaches, ranging from King plots based entirely on experimental input to state-of-the-art \\textit{ab initio} atomic-structure calculations. We show that, above $N=50$, the extracted charge radii depend strongly on the approach used.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. Research 8, 033362 (2026)",
  "arxiv": "2605.04281",
  "author_total": 13,
  "authors": [
    {
      "name": "J. Palmes"
    },
    {
      "name": "K. König"
    },
    {
      "name": "B. K. Sahoo"
    },
    {
      "name": "H. Bodnar"
    },
    {
      "name": "A. Candiello"
    },
    {
      "name": "A. Dorne"
    },
    {
      "name": "R. de Groote"
    },
    {
      "name": "P. Imgram"
    },
    {
      "name": "I. Lopp"
    },
    {
      "name": "P. Müller"
    },
    {
      "name": "W. Nörtershäuser"
    },
    {
      "name": "B. Ohayon"
    },
    {
      "name": "R. Van Duyse"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1hdqj6de0fg4h.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.04281",
  "fulltext_url": null,
  "id": "1hdqj6de0fg4h",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.04281",
  "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",
      "nucl-ex"
    ],
    [
      "arxiv",
      "physics.atom-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.04281",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1hdqj6de0fg4h.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:11Z",
      "native_id": "2605.04281",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.04281"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.atom-ph",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:nucl-ex",
      "subfield": "nuclear"
    }
  ],
  "title": "Nuclear Charge Radii of Sr Isotopes: Reevaluation based on Transition Frequency Measurements in the $5s-5p-4d$ manifold in Sr$^+$",
  "title_text": "Nuclear Charge Radii of Sr Isotopes: Reevaluation based on Transition Frequency Measurements in the 5s−5p−4d manifold in Sr^+",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:11Z",
  "url": "https://research.draconitic.com/paper/1hdqj6de0fg4h",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/th38-y1t9",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}