SAGE

THE RUSSIAN-AMERICAN GALLIUM SOLAR NEUTRINO EXPERIMENT (SAGE)
(
  • Proposed: 1984,
  • Approved: 1985,
  • Started: May, 1988,
  • Still Running
)
SAGE Collaboration
Uses the Gallium-Germanium Neutrino Telescope (GGNT) situated in an underground laboratory built in the Baksan Neutrino Observatory, Northern Caucasus, Russia. Has an overhead shielding of about 4700 m of water equivalent. Sensitive to the low energy neutrinos produced by the p p fusion in the Sun. Exploits the radiochemical procedure and uses liquid metallic gallium (30 tons in the first stage, 57 tons in 1991). A purification procedure, implemented beginning with the January 90 extraction, resulted in a significant background reduction. The SAGE-II phase began in September 92. Counts the K and L peaks in Ge71 decay, with 57 tons of Ga and low background. A calibration with a Cr51 artificial neutrino source of about 0.5 mC activity was carried out in 1995. Taking data (July 96).
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