Measuring mass of neutrinos with {beta}-decays of tritium and rhenium

Journal Article · Mon Nov 09 04:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3266089· OSTI ID:21322963

Dvornicky, R ^[1]; Simkovic, F ^[1]

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1. Department of Nuclear Physics and Biophysics, Comenius University, Mlynska dolina, SK-84248 Bratislava (Slovakia)

Already long time ago the shape of the electron spectrum in {beta}-decays of {sup 3}H and {sup 187}Re has been recognized as an important tool for understanding of neutrino masses. The sensitivity of KATRIN (in preparation, tritium {beta}-decay) and the MARE (under consideration, {sup 187}Re{beta}-decay) experiments to neutrino mass will reach the sub eV domain. In view of this experimental progress there is a request for a highly accurate theoretical description of the electron endpoint spectra. By taking the advantage of the elementary particle treatment of {sup 3}H and {sup 3}He the relativistic form for {beta}-decay endpoint spectrum of tritium is obtained by taking into account also the effect of nuclear recoil. Further, the currently unknown shape of the electron spectrum for the {beta}-decay of {sup 187}Re is presented. It is found that the first forbidden {sup 187}Re(5/2{sup +}){yields}{sup 187}Os(1/2{sup -}){beta}-decay transition is accompanied with emission of mostly p{sub 3/2}-state electrons.

• OSTI ID: 21322963
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1180; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DOUBLE BETA DECAY
ELECTRON EMISSION
ELECTRON SPECTRA
ELECTRONS
EV RANGE
HELIUM 3
MULTIPARTICLE SPECTROMETERS
NEUTRINOS
PARTICLE IDENTIFICATION
RECOILS
REST MASS
RHENIUM 187
SENSITIVITY
SPIN
TRITIUM