{
  "abstract": "We performed high-precision mass measurements of the proton-rich nuclei $^{52}$Ni and $^{51}$Co with the LEBIT Penning trap at the Facility for Rare Isotope Beams (FRIB). For $^{52}$Ni, a mass excess of $-22474.8(2.2)$~keV was determined, which is consistent with a recent storage-ring measurement at the Cooler-Storage Ring (CSRe) but has a factor 37 improved precision. For $^{51}$Co, we obtained a mass excess of $-27375.1(5.7)$~keV, agreeing with a recent CSRe result, while reducing the uncertainty by a factor~2. Combining our mass value for $^{52}$Ni with the known two-proton decay energy of $^{54}$Zn, we determined the mass excess of $^{54}$Zn to be $-6463(42)$~keV. These new mass values reveal a substantial breakdown of the isobaric mass multiplet equation for $A=52$ and $A=54$, and provide stringent benchmarks for isospin-symmetry-breaking effects in the proton-rich $fp$-shell, favoring theoretical descriptions that omit the Coulomb-exchange term.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.09986",
  "author_total": 13,
  "authors": [
    {
      "name": "F. M. Maier"
    },
    {
      "name": "G. Bollen"
    },
    {
      "name": "B. A. Brown"
    },
    {
      "name": "S. E. Campbell"
    },
    {
      "name": "X. Chen"
    },
    {
      "name": "H. Erington"
    },
    {
      "name": "N. D. Gamage"
    },
    {
      "name": "K. Godbey"
    },
    {
      "name": "C. M. Ireland"
    },
    {
      "name": "C. Izzo"
    },
    {
      "name": "R. Ringle"
    },
    {
      "name": "C. S. Sumithrarachchi"
    },
    {
      "name": "A. C. C. Villari"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/eb851ftbntf30.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.09986",
  "fulltext_url": null,
  "id": "eb851ftbntf30",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.09986",
  "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",
      "3106|Nuclear physics research studies"
    ]
  ],
  "openalex": "W7168271782",
  "pdf_url": "https://arxiv.org/pdf/2607.09986",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/eb851ftbntf30.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:04Z",
      "native_id": "2607.09986",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.09986"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-ex",
      "subfield": "nuclear"
    }
  ],
  "title": "High-Precision Mass Measurements of 52Ni and 51Co Reveal Breakdown of the Isobaric Multiplet Mass Equation in the f p Shell",
  "title_text": "High-Precision Mass Measurements of 52Ni and 51Co Reveal Breakdown of the Isobaric Multiplet Mass Equation in the f p Shell",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:04Z",
  "url": "https://research.draconitic.com/paper/eb851ftbntf30",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/xrbm-m61q",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}