Determination of the electron neutrino mass from experiments on electron-capture beta-decay

Conference · Fri Jan 01 00:00:00 EST 1982 · AIP Conf. Proc.; (United States)

OSTI ID:5656988

Jonson, B; Andersen, J U; Beyer, G J; Charpak, G; De Rujula, A; Elbek, B; Gustafsson, H A; Hansen, P G; Knudsen, P; Laegsgaard, E; Pedersen, J

The IBEC theory has been tested for the case of /sup 193/Pt. The Q/sub EC/ value is 56.3 +/- 0.3 keV, and the data make it possible to give an upper limit on the electron neutrino mass of 500 eV (90% CL). The partial beta-decay half-life for M capture in /sup 163/Ho is (4.0+/-1.2) x 10/sup 4/ y and the /sup 163/Ho - /sup 163/Dy mass difference is 2.3 +/- 1.0 keV. From these independent Ho results a half-life of (7+/-2) x 10/sup 3/ y and an upper limit on m/sub nu/sub e// of 1.3 keV can be deduced. 28 references, 12 figures, 3 tables.

• Research Organization: CERN, Geneva, Switzerland
• OSTI ID: 5656988
• Report Number(s): CONF-820855-
• Conference Information: Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 94
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
BETA DECAY RADIOISOTOPES
BREMSSTRAHLUNG
DATA
DAYS LIVING RADIOISOTOPES
DECAY
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE DECAY
ELECTRON CAPTURE RADIOISOTOPES
ELECTRON NEUTRINOS
ELEMENTARY PARTICLES
ENERGY SPECTRA
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FERMIONS
HALF-LIFE
HEAVY NUCLEI
HOLMIUM 163
HOLMIUM ISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTONS
LIMITING VALUES
MASS
MASS DIFFERENCE
MASSLESS PARTICLES
NEUTRINOS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
PLATINUM 193
PLATINUM ISOTOPES
RADIATIONS
RADIATIVE DECAY
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SECONDS LIVING RADIOISOTOPES
SPECTRA
YEARS LIVING RADIOISOTOPES