Feasibility of aBr81(ν,e−)Kr81Solar Neutrino Experiment

A solar neutrino experiment utilizing the interaction of ${}_{}{}^{81}{}_{}{}^{}\mathrm{Br}(\nu ,e^{-}){}_{}{}^{81}{}_{}{}^{}\mathrm{Kr}$ to study the ${}_{}{}^7{}_{}{}^{}\mathrm{Be}$ neutrino source in the interior of the sun is shown to be feasible. Resonance ionization spectroscopy was used to count less than 1000 atoms of 2×${10}^5$-yr ${}_{}{}^{81}{}_{}{}^{}\mathrm{Kr}$, making the bromine experiment possible. Except for the method of counting product atoms, the bromine experiment would be very similar to the successful chlorine detector ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}(\nu ,e^{-}){}_{}{}^{37}{}_{}{}^{}\mathrm{Ar}$, and thus it is a natural sequel to the only solar neutrino experiment to date.