Results from the Soviet-American gallium experiment

Conference · Wed Jan 01 04:00:00 EST 1992

OSTI ID:6851301

Anosov, O L; Faizov, E L; Gavrin, V N; Kalikhov, A V; Knodel, T V; Knyshenko, I I; Kornoukhov, V N; Mirmov, I N; Ostrinsky, A V; Pshukov, A M; Shikhin, A A; Timofeyev, P V; Veretenkin, E P; Vermul, V M; Zatsepin, G T ^[1]; Bowles, T J; Elliott, S R; Nico, J S; O'Brien, H A; Wark, D L ; Wilkerson, J F ^[2]

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1. AN SSSR, Moscow (Russian Federation). Inst. Yadernykh Issledovanij
2. Los Alamos National Lab., NM (U

A radiochemical [sup 7l]Ga--[sup 7l]Ge experiment to determine the primary flux of neutrinos from the Sun began measurements of the solar neutrino flux at the Baksan Neutrino Observatory in 1990. The number of [sup 7l]Ge atoms extracted from 30 tons of gallium in 1990 and 57 tons in 1991 was measured in twelve runs during the period of January 1990 to December 1991. For the 1990 data, we observed the capture rate to be 20 + 15/[minus]20 (stat) [plus minus]32 (syst) SNU, resulting in a limit of less than 79 SNU (90% CL). This is to be compared with 132 SNU predicted by the Standard Solar Model. The 1991 data, taken with 57 tons of gallium, shows a non zero [sup 7l]Ge signal. A final result from the 1990 and 1991 data is still pending completion of studies of possible systematic effects.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: DOE; NSF; RUAS; MSRUF; USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States); AN SSSR, Moscow (Russian Federation); Ministry of Sciences (Russian Federation)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6851301
• Report Number(s): LA-UR-92-3614; CONF-9206227--5; ON: DE93003798
• Country of Publication: United States
• Language: English

Related Subjects

440104 -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
662320* -- Neutrino Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BETA DECAY RADIOISOTOPES
DATA
DAYS LIVING RADIOISOTOPES
DETECTION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FERMIONS
GALLIUM 71
GALLIUM ISOTOPES
GERMANIUM 71
GERMANIUM ISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTONS
MASSLESS PARTICLES
MATHEMATICS
NEUTRINO DETECTION
NEUTRINOS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
RADIATION DETECTION
RADIATIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SOLAR NEUTRINOS
SOLAR PARTICLES
SOLAR RADIATION
STABLE ISOTOPES
STATISTICS
STELLAR RADIATION