Direct measurements of neutrino mass

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5254899

Robertson, R G.H.

Some recent developments in the experimental search for neutrino mass are discussed. New data from Los Alamos on the electron neutrino mass as measured in tritium beta decay give an upper limit of 9.3 eV at the 95% confidence level. This result is not consistent with the long-standing ITEP result of 26(5) eV within a model-independent'' range of 17 to 40 eV. It now appears that the electron neutrino is not sufficiently massive to close the universe by itself. Hime and Jelley report finding new evidence for a 17-keV neutrino in the {Beta} decay of {sup 35}S and {sup 63}Ni. Many other experiments are being reported and the situation is still unresolved. 56 refs., 1 fig., 3 tabs.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5254899
• Report Number(s): LA-UR-91-3136; CONF-9103166--5; ON: DE92000168
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DECAY
ELECTRON NEUTRINOS
ELEMENTARY PARTICLES
FERMIONS
HYDROGEN ISOTOPES
ISOTOPES
LEPTONS
LIGHT NUCLEI
MASS
MASSLESS PARTICLES
MEASURING METHODS
NEUTRINOS
NUCLEAR DECAY
NUCLEI
ODD-EVEN NUCLEI
RADIOISOTOPES
REST MASS
TRITIUM
YEARS LIVING RADIOISOTOPES