Experimental Approaches To Neutrino Nuclear Responses For Beta Beta Decays And Astro-Neutrinos

Fundamental properties of neutrinos are investigated by studying double beta decays (beta beta-decays), while atro-neutrino nucleo-syntheses and astro-neutrino productions are investigated by studying inverse beta decays (inverse beta-decays) induced by astroneutrinos. Neutrino nuclear responses for these beta beta and beta-decays are crucial for these neutrino studies in nuclei. This reports briefly perspectives on experimental studies of neutrino nuclear responses (square of nuclear matrix element) for beta beta-decays and astroneutrinos by using nuclear and leptonic (muon) charge-exchange reactions