Spectroscopy of low energy solar neutrinos by MOON

The MOON (Molybdenum Observatory Of Neutrinos) project aims at high sensitive studies of the double beta (ββ) decays with sensitivity to Majorana ν mass of the order of ∼0.03 eV and the charged-current (CC) neutrino spectroscopy of the major components of the pp and 7Be solar ν's. The present status of MOON for the low energy solar ν experiment is briefly discussed. The inverse β rays from solar-ν captures of 100Mo are measured in delayed coincidence with the subsequent β decay of 100Tc. MOON's exclusive CC value by 7Be solar ν, together with the GNO CC data, will provide the pp solar ν flux with good accuracy.