Published 1990 | Version v1
Report Open

Limit on electron neutrino mass from observation of the beta decay of molecular tritium

Creators

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

Description

We report the most sensitive upper limit set on the mass of the electron antineutrino. The upper limit of 9.4 eV (95% confidence level) was obtained from a study of the shape of the beta decay spectrum of free molecular tritium. Achieving such a level of sensitivity required precise determinations of all processes that modify the shape of the observed spectrum. This result is in clear disagreement with a reported value for the mass of 26(5) eV. 30 refs., 3 figs., 2 tabs

Availability note (English)

MF available from INIS under the Report Number; NTIS, PC A03/MF A01 as DE91002319; OSTI; INIS; US Govt. Printing Office Dep.

Files

22030474.pdf

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Additional details

Publishing Information

Imprint Pagination
11 p.
Report number
LA-UR--90-3465

Conference

Title
14. international conference on neutrino physics and astrophysics.
Dates
10-15 Jun 1990.
Place
Geneva (Switzerland).

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
22030474
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Conference, Numerical Data
Descriptors DEI
BETA DECAY; BETA SPECTRA; DATA PROCESSING; EFFICIENCY; ELECTRON NEUTRINOS; ENERGY LOSSES; EXPERIMENTAL DATA; MEASURING METHODS; REST MASS; TRITIUM
Descriptors DEC
BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; DATA; DECAY; ELEMENTARY PARTICLES; FERMIONS; HYDROGEN ISOTOPES; INFORMATION; ISOTOPES; LEPTONS; LIGHT NUCLEI; MASS; MASSLESS PARTICLES; NEUTRINOS; NUCLEAR DECAY; NUCLEI; NUMERICAL DATA; ODD-EVEN NUCLEI; RADIOISOTOPES; SPECTRA; YEARS LIVING RADIOISOTOPES

Optional Information

Contract/Grant/Project number
Contract W-7405-ENG-36
Secondary number(s)
CONF-9006276--2.