2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37113Two methods are discussed for the solar neutrino spectroscopy in the sub-MeV region: absorption in a loaded liquid scintillator and elastic scattering in a TPC. The different neutrino oscillation solutions predict a strong effect in this energy region where the largest fraction (\sim 98%) of solar neutrinos lies. Both projects have reached the stage where they have to prove their capability to attain a background low enough for solar neutrino detection.9 LaTeX pages, 7 postscript figures, uses epsfig and pdproc. Talk presented at the NO-VE Int. Workshop, Venezia, ITALY, 24-26 July 2001. To be published in the Workshop ProceedingsHigh Energy Physics - ExperimentHigh Energy Physics - Phenomenologytext