Spectroscopy of double-beta and inverse-beta decays from Mo-100 for neutrinos

Spectroscopic studies of two beta rays from Mo-100 are shown to be of poten tial interest for investigating both the Majorana nu mass by neutrinoless d ouble beta decay (O nu beta beta) and low energy solar nu's by inverse beta decay. With a multiton Mo-100 detector, coincidence studies of correlated pp from O nu beta beta, together with the large Q value (Q(beta beta)), per mit identification of the nu-mass term with a sensitivity of similar to 0.0 3 eV. Correlation studies of the inverse beta decay and the successive beta decay of Tc-100, together with the large capture rates for low energy sola r nu's, make it possible to detect, in real time, individual low energy sol ar nu in the same detector.