  Results for solar neutrino detection from the SuperKamiokande collaboration
have been presented recently while those from the Sudbury Neutrino Observatory
are expected in the near future. These experiments are sensitive to the 8B
neutrinos from the sun, the shape of whose spectrum is well-known but the
normalisation is less certain. We propose several variables, insensitive to the
absolute flux of the incident beam, which probe the shape of the observed
spectrum and can sensitively signal neutrino oscillations. They provide methods
to extract the neutrino mixing angle and mass splitting from the data and also
to distinguish oscillation to sequential neutrinos from those to a sterile
neutrino.
