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Production of a neutrino source through proton induced reaction is studied byusing the particle transport code, GEANT4. Unstable isotope such as $^{27}$Sican be produced when $^{27}$Al target is bombarded by 15 MeV energetic protonbeams. Through the beta decay process of the unstable isotope, a newelectron-neutrino source in the 1.0 $\sim$ 5.0 MeV energy range is obtained.Proton induced reactions are simulated with JENDL High Energy File 2007(JENDL/HE-2007) data and other nuclear data. For radioactive decay processes,we use "G4RadioactiveDecay" model based on the Evaluated Nuclear Structure DataFile (ENSDF). We suggest target systems required for future's solar neutrinoexperiments, in particular, for the vacuum-matter transition region. As for thedetection system of the new neutrino source, we evaluate reaction rates foravailable radiochemical detectors and LENA type scintillator detector.Possibility of detecting sterile neutrinos is also discussed.

A new neutrino source for the study of the solar neutrino physics in the vacuum-matter transition region