{
  "abstract": "A comprehensive $γ$-ray spectroscopy study of excited states in $^{92}$Sr populated via $β^-$ decay of $^{92}$Rb ($J^π=0^-$, $Q_β=8095(6)$~keV) was performed with the GRIFFIN spectrometer at the Isotope Separator and Accelerator (ISAC) radioactive ion beam facility at TRIUMF. The high $γ$-ray efficiency of the GRIFFIN spectrometer combined with the intense rubidium beams produced allowed for 864 $γ$-ray transitions to be placed in the level scheme with 190 excited levels populated, most of them identified for the first time. The excitation energies of low-spin states in $^{92}$Sr are well reproduced by large-scale Shell Model calculations up to 5~MeV. The $β$-feeding intensities are in very good agreement with results from a recent study employing Modular Total Absorption Spectroscopy, indicating a significant suppression of the Pandemonium effect. The experimental picture reveals the energy level dependence of log~$ft$ values in unprecedented detail. These log~$ft$ values are well reproduced by Multiple-Commutator Model calculations that identify the features in the excited levels' wavefunctions that enable the population of high-lying levels with a low effective Q-value that belong to the Pygmy Dipole Resonance.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.21520",
  "author_total": 55,
  "authors": [
    {
      "name": "P Spagnoletti"
    },
    {
      "name": "M Ramalho"
    },
    {
      "name": "S Tahtela"
    },
    {
      "name": "E Kauppinen"
    },
    {
      "name": "J Suhonen"
    },
    {
      "name": "C Andreoiu"
    },
    {
      "name": "M Scheck"
    },
    {
      "name": "V Vedia"
    },
    {
      "name": "Z Ahmed"
    },
    {
      "name": "D Annen"
    },
    {
      "name": "G.C Ball"
    },
    {
      "name": "G Benzoni"
    },
    {
      "name": "S.S Bhattacharjee"
    },
    {
      "name": "H Bidaman"
    },
    {
      "name": "V Bildstein"
    },
    {
      "name": "S Buck"
    },
    {
      "name": "R Caballero-Folch"
    },
    {
      "name": "R.J Coleman"
    },
    {
      "name": "S Devinyak"
    },
    {
      "name": "I Dillmann"
    },
    {
      "name": "I Djianto"
    },
    {
      "name": "F.H Garcia"
    },
    {
      "name": "A.B Garnsworthy"
    },
    {
      "name": "P.E Garrett"
    },
    {
      "name": "B Greaves"
    },
    {
      "name": "C.J Griffin"
    },
    {
      "name": "G.F Grinyer"
    },
    {
      "name": "E.G Fuakye"
    },
    {
      "name": "G Hackman"
    },
    {
      "name": "D Hymers"
    },
    {
      "name": "D Kalaydjieva"
    },
    {
      "name": "R Kanungo"
    },
    {
      "name": "K Kapoor"
    },
    {
      "name": "E Kasanda"
    },
    {
      "name": "W Korten"
    },
    {
      "name": "N Marchini"
    },
    {
      "name": "K Mashtakov"
    },
    {
      "name": "A Nannini"
    },
    {
      "name": "K Ortner"
    },
    {
      "name": "B Olaizola"
    },
    {
      "name": "C Natzke"
    },
    {
      "name": "C.M Petrache"
    },
    {
      "name": "M Polettini"
    },
    {
      "name": "A Radich"
    },
    {
      "name": "M Rocchini"
    },
    {
      "name": "N Saei"
    },
    {
      "name": "M Satrazani"
    },
    {
      "name": "M Siciliano"
    },
    {
      "name": "M Singh"
    },
    {
      "name": "C.E Svensson"
    },
    {
      "name": "D.A Torres"
    },
    {
      "name": "R Umashankar"
    },
    {
      "name": "E Wadge"
    },
    {
      "name": "T Zidar"
    },
    {
      "name": "M Zielinska"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/13n5aytk5arxh.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.21520",
  "fulltext_url": null,
  "id": "13n5aytk5arxh",
  "issns": [],
  "landing_url": "https://hal.science/hal-05770485v1",
  "language": "en",
  "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": [
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      "arxiv",
      "nucl-ex"
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      "openalex",
      "3106|Nuclear physics research studies"
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  "openalex": "W7213913778",
  "pdf_url": "https://arxiv.org/pdf/2609.21520",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/13n5aytk5arxh.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:43Z",
      "native_id": "hal-05770485",
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      "url": "https://hal.science/hal-05770485v1"
    },
    {
      "first_seen": "2026-10-30T12:23:03Z",
      "native_id": "2609.21520",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.21520"
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  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-ex",
      "subfield": "nuclear"
    }
  ],
  "title": "First observation of the fine structure of the Pygmy Dipole Resonance in a nucleus away from stability via the $β^-$ decay of $^{92}$Rb to $^{92}$Sr",
  "title_text": "First observation of the fine structure of the Pygmy Dipole Resonance in a nucleus away from stability via the β^- decay of ^92Rb to ^92Sr",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:03Z",
  "url": "https://research.draconitic.com/paper/13n5aytk5arxh",
  "venue": "HAL",
  "versions": []
}