  Effective values for the key helium burning reaction rates, triple-alpha and
12C(alpha,gamma)16O, are obtained by adjusting their strengths so as to obtain
the best match with the solar abundance pattern of isotopes uniquely or
predominately made in core collapse supernovae. These effective rates are then
used to determine the production of the neutrino isotopes. The use of effective
rates considerably reduces the uncertainties in the production factors arising
from uncertainties in the helium burning rates, and improves our ability to use
the production of 11B to constrain the neutrino emission from supernovae.
