{"paper":{"title":"First measurement of the partial widths of $^{209}$Bi decay to the ground and to the first excited states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A.Giachero, A.Nucciotti, C.Brofferio, C.Bucci, C.Gotti, C.Maiano, E.Ferri, E.Previtali, G.Pessina, J.W.Beeman, L.Cardani, L.Gironi, L.Pattavina, L.Zanotti, M.Biassoni, M.Carrettoni, M.Clemenza, M.Pavan, M.Sisti, O.Cremonesi, P.Gorla, S.Capelli, S.Pirro","submitted_at":"2011-10-14T08:04:03Z","abstract_excerpt":"$^{209}$Bi alpha decay to the ground and to the first excited state have been contemporary observed for the first time with a large BGO scintillating bolometer. The half-life of $^{209}$Bi is determined to be $\\tau_{1/2}$=(2.01$\\pm$0.08)$\\cdot10^{19}$ years while the branching ratio for the ground-state to ground-state transition is (98.8$\\pm$0.3)%."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.3138","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"}