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-; TRN: 86-021605
• Journal Information: AIP Conf. Proc.; (United States), Vol. 94; Conference: International conference on X-ray and atomic inner-shell physics, Eugene, OR, USA, 23 Aug 1982
• Country of Publication: United States
• Language: English

Related Subjects

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