Search for Neutrinos from the Sun

A search was made for solar neutrinos with a detector based upon the reaction ${\mathrm{Cl}}^{37}(\nu , e^{-}){\mathrm{Ar}}^{37}$. The upper limit of the product of the neutrino flux and the cross sections for all sources of neutrinos was 3×${10}^{-36\mathrm{}}$ ${\sec }^{-1\mathrm{}}$ per ${\mathrm{Cl}}^{37}$ atom. It was concluded specifically that the flux of neutrinos from ${\mathrm{B}}^8$ decay in the sun was equal to or less than 2×${10}^6$ ${\mathrm{cm}}^{-2\mathrm{}}$ ${\sec }^{-1\mathrm{}}$ at the earth, and that less than 9% of the sun's energy is produced by the carbon-nitrogen cycle.