{"paper":{"title":"$g$ Factor of Boron-like Tin","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"2), (2) Shanghai EBIT laboratory, B. Sikora (1), B. Tu (1, China), C. H. Keitel (1), C. M. K\\\"onig (1), F. Hei{\\ss}e (1), Fudan University, Germany, Heidelberg, Institute of Modern Physics, J. Morgner (1), K. Blaum (1) ((1) Max-Planck-Institut f\\\"ur Kernphysik, M. Moretti (1), N. S. Oreshkina (1), Shanghai, S. Sturm (1), T. Sailer (1), V. A. Yerokhin (1), Z. Harman (1)","submitted_at":"2025-05-30T06:48:38Z","abstract_excerpt":"In the ALPHATRAP experiment, the $g$ factor of boron-like $^{118}\\mathrm{Sn}^{45+}$ has been measured with a $0.5$ parts-per-billion uncertainty. This is the first high-precision measurement of a heavy boron-like $g$ factor. The measured value of $0.644\\,703\\,826\\,5(4)$ is consistent with the presented \\textit{ab initio} state-of-the-art theory calculations, which predict a value of $0.644\\,702\\,9(8)$. So far, the only boron-like $g$ factor measured with high precision has been $^{40}\\mathrm{Ar}^{13+}$. The measurement presented here therefore tests quantum electrodynamics as well as many-elec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.24272","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/2505.24272/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"}