Low energy solar neutrino experiments: The Soviet American Gallium Experiment (SAGE)

Details Low energy solar neutrino experiments: The Soviet American Gallium Experiment (SAGE) Low energy solar neutrino experiments: The Soviet American Gallium Experiment (SAGE)

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995stin...9530618.&link_type=abstract

Final Report, 12 Aug. 1988 - 31 Oct. 1994 Louisiana State Univ., Baton Rouge, LA.

Physics

Proportional Counters, Radiation Measurement, Solar Flux Density, Solar Neutrinos, Calibrating, Cerenkov Counters, Gallium Isotopes

Scientific paper

Two Ga-71 experiments are currently in operation. The first is the 60 ton Soviet American Gallium Experiment (SAGE) at Baksan, which has recently reported a signal level of 73 +18/-16 (stat) +5/-7 (syst) solar neutrino units (SNU); the second is the 30 ton GALLEX experiment at Gran Sasso, which sees 87 +/-14 +/-7 SNU. Both results are consistent, and both suggest a neutrino flux level low compared to the total expected from standard solar model calculations. It is not possible, however, to make a case for flux levels lower than the p-p prediction. Assuming the experiments are correct, it is not at all clear yet whether the answer lies with the neutrino physics, solar physics, or a combination of both. Nevertheless, though solar model effects cannot be ruled out, if the Homestake and Kamiokande results are taken at face value, then these two experiments alone imply that neutrino oscillations or some similar particle physics result must be present to some degree. This report reviews the SAGE experiment and recent results. Non-radiochemical experiments are also discussed, with an emphasis on the Kamiokande water Cerenkov results.

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