{"paper":{"title":"Direct decay-energy measurement as a route to the neutrino mass","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"Andree Welker, David Lunney, Dennis Neidherr, Dinko Atanasov, Frank Wienholtz, Jonas Karthein, Kai Zuber, Klaus Blaum, Lutz Schweikhard, Maxime Mougeot, Pavel Filianin, Sergey Eliseev, Vladimir Manea, Yuri Novikov","submitted_at":"2019-05-14T10:46:24Z","abstract_excerpt":"A high-precision measurement of the $^{131}$Cs$ \\rightarrow ^{131}$Xe ground-to-ground-state electron-capture $Q_{\\textrm{EC}}$-value was performed using the ISOLTRAP mass spectrometer at ISOLDE/CERN. The novel PI-ICR technique allowed to reach a relative mass precision $\\delta m/m$ of $1.4\\cdot10^{-9}$. A mass resolving power $m/\\Delta m$ exceeding $1\\cdot10^7$ was obtained in only $1\\,$s trapping time. Allowed electron-capture transitions with sub-keV or lower decay energies are of high interest for the direct determination of the $\\nu_e$ mass. The new measurement improves the uncertainty on"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.05510","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"}