{"paper":{"title":"Universal Effective Charges in the $sd$ and $fp$ Shells","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"nucl-ex","authors_text":"A. A. Doetsch, A. C. Hartley, A. Chester, A. D. Ayangeakaa, A. Estrade, A. E. Stuchbery, A. Fija{\\l}kowska, A. Gargano, A. Laminack, A. L. Richard, A. O. Macchiavelli, A. Spyrou, A. Sweet, A. Tsantiri, B. A. Brown, B. C. Rasco, B. Longfellow, B. M. Sherrill, B. P. Crider, C. Frantzis, D. E. M. Hoff, D. Hoskins III, D. L. Bleuel, D. P. Scriven, D. Seweryniak, E. C. Good, E. K. Ronning, G. Cerizza, G. E. Rose, G. Owens-Fryar, H. Arora, H. C. Berg, H. L. Crawford, H. Schatz, I. Cox, I.J. Richardson, J. Davis, J. D. Holt, J. G. Duarte, J. Huffman, J. M. Allmond, J. M. Berkman, J. M. Christie, J R. Palomino, J. T. Harke, K. Bosmpotinis, K. Haak, K. Hermansen, K. Kolos, K. P. Rykaczewski, K. Siegl, M. J. Mogannam, M. Karny, M. Madurga, M. M. Rajabali, M. P. Carpenter, M. Singh, M. Stepaniuk, N. D. Scielzo, N. Kitamura, O. B. Tarasov, P. Van Isacker, R. Grzywacz, R. Jain, R. S. Lubna, R. Yokoyama, S. Hanai, S. Lyons, S. Neupane, S. N. Liddick, S. Uthayakumaar, S. Watters, T. Gaballah, T. H. Ogunbeku, T. J. Gray, T. J. Ruland, T. Miyagi, T. T. King, V. Tripathi, W. B. Walters, W.-J. Ong, Z. Xu","submitted_at":"2025-06-27T02:07:04Z","abstract_excerpt":"The 247-keV state in $^{54}$Sc, populated in the $\\beta$ decay of $^{54}$Ca, is reported here as a nanosecond isomer with a half-life of 26.0(22) ns. The state is interpreted as the $1^+$ member of the $\\pi f_{7/2}\\otimes\\nu f_{5/2}$ spin-coupled multiplet, which decays to the $3^+,\\pi f_{7/2} \\otimes \\nu p_{1/2}$ ground state. The new half-life corresponds to a pure $E2$ transition with a strength of 1.93(16) W.u., providing the most precise, unambiguous $B(E2)$ value in the neutron-rich $fp$ region to date for a nucleus with valence protons above $Z=20$. Notably, it is roughly four times lar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.21852","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2506.21852/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}