Solar neutrinos observed by GALLEX at Gran Sasso

Conference · Fri Jan 31 23:00:00 EST 1992 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5543903

Vignaud, D ^[1]

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1. DAPNIA/Service de Physique des Particules, CE Saclay, F-91191 Gif-sur-Yvette Cedex (France)

The GALLEX experiment, installed in the Gran Sasso Underground Laboratory, has measured the rate of production of [sup 71]Ge from [sup 71]Ga by solar neutrinos, using 30.3 tons of gallium in the form of gallium chloride solution. 14 measurements carried out in one year of operation give, after corrections for side reactions and other backgrounds, an average value of (83[plus minus]19(stat.)[plus minus]8(syst.)) SNU (1[sigma]) due to solar neutrinos. This result, two standard deviations below the predictions of solar model calculations (122--132 SNU), constitutes the first observation of solar pp-neutrinos. The possible deficit is interpreted, together with those of the chlorine and Kamiokande experiments, in terms either of astrophysics or of neutrino oscillations (MSW effect).

• OSTI ID: 5543903
• Report Number(s): CONF-920837--
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Vol. 272:1; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

662320* -- Neutrino Interactions-- (1992-)
662430 -- Properties of Leptons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASTROPHYSICS
BARYON-BARYON INTERACTIONS
BETA DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY SPECTRA
EVEN-ODD NUCLEI
FERMIONS
GALLIUM 71
GALLIUM ISOTOPES
GERMANIUM 71
GERMANIUM ISOTOPES
HADRON-HADRON INTERACTIONS
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LEPTONS
LIFETIME
MASS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NEUTRINO OSCILLATION
NEUTRINO-NUCLEON INTERACTIONS
NEUTRINOS
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
ODD-EVEN NUCLEI
PARTICLE IDENTIFICATION
PARTICLE INTERACTIONS
PARTICLE MODELS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
RADIATIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SOLAR NEUTRINOS
SOLAR PARTICLES
SOLAR RADIATION
SPECTRA
STABLE ISOTOPES
STANDARD MODEL
STELLAR RADIATION
UNIFIED GAUGE MODELS