  In order to resolve the overproduction problem of 11B in supernova explosions
during Galactic chemical evolution, the dependence of the ejected masses of the
light elements produced through the nu-process in supernova explosions on
supernova neutrino parameters is investigated and constraints on the supernova
neutrinos are evaluated. Detailed nucleosynthesis in a supernova explosion
model corresponding to SN 1987A is calculated by postprocessing. The ejected
masses of 11B and 7Li depend strongly on the temperature of mu- and
tau-neutrinos and their antiparticles and are roughly proportional to the total
neutrino energy. The range of temperature of mu- and -tau neutrinos and their
antiparticles appropriate for the amount of 11B necessary for Galactic chemical
evolution and the total neutrino energy deduced from the gravitational energy
of a typical neutron star is between 4.8 MeV and 6.6 MeV. In the case of
neutrino energy spectra with non-zero chemical potential, this range decreases
by about 10%.
