2006/09/29 by R. Arnold, C. Augier, Justin Baker +66 · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Atomic physics #Beta decay #Double beta decay #Electron #Electron capture #Excited state #Hadron #Half-life #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics theoretical and experimental studies #Physics #State (computer science) #hep-ex
paper · pdf · doi:10.1016/j.nuclphysa.2006.09.021
published as Nucl.Phys.A781:209-226,2007 · 23 pages, 7 figures, 4 tables, submitted to Nucl. Phys
arxiv created 2006/09/29 · openalex publication_date 2006/10/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The double beta decay of 100Mo to the 0+1 and 2+1 excited states of 100Ru is studied using the NEMO 3 data. After the analysis of 8024 h of data the half-life for the two-neutrino double beta decay of 100Mo to the excited 0+1 state is measured to be T^(2nu)1/2 = [5.7+1.3-0.9(stat)+/-0.8(syst)]x 1020 y. The signal-to-background ratio is equal to 3. Information about energy and angular distributions of emitted electrons is also obtained. No evidence for neutrinoless double beta decay to the excited 0+1 state has been found. The corresponding half-life limit is T^(0nu)1/2(0+ --> 0+1) > 8.9 x 1022 y (at 90% C.L.). The search for the double beta decay to the 2+1 excited state has allowed the determination of limits on the half-life for the two neutrino mode T^(2nu)1/2(0+ --> 2+1) > 1.1 x 1021 y (at 90% C.L.) and for the neutrinoless mode T^(0nu)1/2(0+ --> 2+1) > 1.6 x 1023 y (at 90% C.L.).