- Conference date: 23−29 May 1991
- Location: Tucson, Arizona (USA)
A radiochemical 71Ga‐71 Ge experiment to determine the primary flux of neutrinos from the Sun has begun operation at the Baksan Neutrino Observatory in the USSR. The number of 71 Ge atoms extracted from thirty tons of gallium was measured in five runs during the period of January to July 1990. Assuming that the extraction efficiency for 71 Ge atoms produced by solar neutrinos is the same as natural Ge carrier, this corresponds to a limit on the product of the neutrino flux and the cross section for all sources of neutrinos of less than 72 SNU (90% CL). This is to be compared with the flux of 132 SNU predicted by the Standard Solar Model.
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