6533b833fe1ef96bd129b69b
RESEARCH PRODUCT
A new upper limit of the electron anti neutrino rest mass from tritium β-decay
J. BonnCh. WeinheimerA. MolzB. DegenTh. LoekenG. KubeM. PrzyrembelM. SteiningerM. SchraderHartmut BackeH. BarthPaul LeidererL. FleischmannA. HermanniTh. EdlingJ.u. GrooβR. B. MooreA. PicardR. HaidErnst W. OttenA. Osipowiczsubject
Nuclear physicsPhysicsNuclear and High Energy PhysicsSpectrometerInvariant massTritiumLimit (mathematics)ElectronNeutrinoAtomic physicsAtomic and Molecular Physics and OpticsAtomic massdescription
Abstract A new upper limit of the electron anti neutrino rest mass has been deduced from the tritium β-decay spectrum. A source of molecular tritium has been investigated with a new solenoid retarding spectrometer. The results are m ν ϵ 2 = −38.8 ± 34.1 stat ± 15.1 syst (eV) 2 /c 4 from which we conclude m ν ϵ ≤ 7.2 eV/c 2 with 95% c.l. Our β-endpoint corresponds to a 3H-3He atomic mass difference of Δm( 3 H- 3 He) = 18590.8 ± 3 eV/c 2 (1σ) .
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-04-01 | Nuclear Physics B - Proceedings Supplements |