{
  "abstract": "Excited states in $^{148}_{~66}$Dy were populated via $β^+/EC$ decay of $^{148m}$Ho using the GRIFFIN spectrometer at the TRIUMF ISAC-I facility. A combined measurement of the mean lifetime of the $3_1^-$ level using the Generalized Centroid Difference (GCD) method and branching fraction of the $3_1^-\\rightarrow0_1^+$ $γ$-ray decay has been performed. From these results, an enhanced electric octupole $B(E3;3_1^-\\rightarrow0_1^+)$ transition strength of 46(3)~W.u. has been determined in $^{148}_{~66}$Dy. This is the largest measured value across the closed neutron shell at $N=82$ and provides direct evidence of enhanced octupole collectivity beyond $Z=64$. The evolution of the $B(E3; 3^-_1 \\rightarrow 0^+_1)$ strength along the $N=82$ isotonic chain is compared with quasiparticle random-phase approximation (QRPA) calculations using the SkI3 and SkM$^*$ Skyrme energy-density functionals, as well as with large-scale shell-model (SM) calculations. This result extends the boundaries of enhanced octupole collectivity far from the so-called `octupole magic numbers' $Z=56$ and $N=88$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.21499",
  "author_total": 39,
  "authors": [
    {
      "name": "P. Spagnoletti"
    },
    {
      "name": "V. Vedia"
    },
    {
      "name": "E. Yuksel"
    },
    {
      "name": "Y. X. Yu"
    },
    {
      "name": "G. J. Fu"
    },
    {
      "name": "R. Umashankar"
    },
    {
      "name": "G. Andreetta"
    },
    {
      "name": "C. Andreoiu"
    },
    {
      "name": "A. A. Avaa"
    },
    {
      "name": "G. C. Ball"
    },
    {
      "name": "V. Bildstein"
    },
    {
      "name": "S. Buck"
    },
    {
      "name": "E. Cantacuzene"
    },
    {
      "name": "G. Colombi"
    },
    {
      "name": "I. Dillmann"
    },
    {
      "name": "L. P. Gaffney"
    },
    {
      "name": "A. B. Garnsworthy"
    },
    {
      "name": "P. E. Garrett"
    },
    {
      "name": "G. F. Grinyer"
    },
    {
      "name": "G. Hackman"
    },
    {
      "name": "J. Liu"
    },
    {
      "name": "A. Ludlam"
    },
    {
      "name": "L. L. Luperi"
    },
    {
      "name": "Madhu"
    },
    {
      "name": "T. La Marca"
    },
    {
      "name": "D. Movilla-Quintero"
    },
    {
      "name": "S. Murillo Morales"
    },
    {
      "name": "R. Nicolas del Alamo"
    },
    {
      "name": "M. M. Rajabali"
    },
    {
      "name": "P. H. Regan"
    },
    {
      "name": "M. Rocchini"
    },
    {
      "name": "M. Scheck"
    },
    {
      "name": "J. Seger"
    },
    {
      "name": "S. Sekal"
    },
    {
      "name": "D. Stramaccioni"
    },
    {
      "name": "C. E. Svensson"
    },
    {
      "name": "A. Tsantiri"
    },
    {
      "name": "J. Williams"
    },
    {
      "name": "F. Wu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/30en0gvbdd3hy.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.21499",
  "fulltext_url": null,
  "id": "30en0gvbdd3hy",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.21499",
  "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": "W7213869628",
  "pdf_url": "https://arxiv.org/pdf/2609.21499",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/30en0gvbdd3hy.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:03Z",
      "native_id": "2609.21499",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.21499"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-ex",
      "subfield": "nuclear"
    }
  ],
  "title": "Direct measurement of Enhanced octupole collectivity in 148Dy",
  "title_text": "Direct measurement of Enhanced octupole collectivity in 148Dy",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:03Z",
  "url": "https://research.draconitic.com/paper/30en0gvbdd3hy",
  "venue": "arXiv",
  "versions": []
}