{"paper":{"title":"Precision half-life measurement of the \\boldmath$\\beta^+$ decay of \\tsups{37}K","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"B. Fenker, B.T. Roeder, D. Melconian, E. McCleskey, H.I. Park, J.C. Hardy, M. McCleskey, M. Mehlman, P.D.Shidling, S. Behling, V.E. Iacob","submitted_at":"2014-07-07T15:32:02Z","abstract_excerpt":"The half-life of \\tsups{37}K has been measured to be $1.23651(94)~\\mathrm{s}$, a value nearly an order of magnitude more precise than the best previously reported. The $\\beta^+$ decay of \\tsups{37}K occurs mainly via a superallowed branch to the ground-state of its $T=1/2$ mirror, \\tsups{37}Ar. This transition has been used recently, together with similar transitions from four other nuclei, as an alternative test of CVC and method for determining $V_{ud}$, but the precision of its $ft$ value was limited by the relatively large half-life uncertainty. Our result corrects that situation. Another "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.1742","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":""},"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"}