Published 1990 | Version v1
Report Restricted

Improved limit on the mass of bar νe from the beta decay of molecular tritium

Creators

  • 1. Los Alamos National Lab., NM (USA)
  • 2. Lawrence Livermore National Lab., CA (USA)

Description

We report a new upper limit of 13.4 eV (95% confidence level) on the mass of the electron antineutrino from a study of the shape of the beta spectrum of free molecular tritium. This result appears to be inconsistent with a reported value for the mass of 26(5) eV. The electron neutrino is evidently not massive enough to close the universe by itself. 21 refs., 1 fig., 2 tabs

Availability note (English)

MF available from INIS under the Report Number; NTIS, PC A02/MF A01 as DE90013159; OSTI; INIS; US Govt. Printing Office Dep.

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Additional details

Publishing Information

Imprint Pagination
9 p.
Report number
LA-UR--90-2125

Conference

Title
15. general meeting of the Division of Particles and Fields of the American Physical Society.
Dates
3-6 Jan 1990.
Place
Houston, TX (USA).

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
21073848
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
BETA DECAY; DATA ACQUISITION SYSTEMS; ELECTRON ANTINEUTRINOS; MASS SPECTRA; REST MASS; TRITIUM
Descriptors DEC
ANTILEPTONS; ANTIMATTER; ANTINEUTRINOS; ANTIPARTICLES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; DECAY; ELECTRON NEUTRINOS; ELEMENTARY PARTICLES; FERMIONS; HYDROGEN ISOTOPES; ISOTOPES; LEPTONS; LIGHT NUCLEI; MASS; MASSLESS PARTICLES; MATTER; NEUTRINOS; NUCLEAR DECAY; NUCLEI; ODD-EVEN NUCLEI; RADIOISOTOPES; SPECTRA; YEARS LIVING RADIOISOTOPES

Optional Information

Contract/Grant/Project number
Contract W-7405-ENG-36; W-7405-ENG-48
Secondary number(s)
CONF-900135--12.