  Based on the magnetorotational model of a supernova explosion with core
collapse, we investigate the significant processes of neutrino heating of the
supernova shock. These processes should be taken into account in
self-consistent modeling, since the neutrino heating mechanism is capable of
increasing the explosion efficiency. We show that, even in the presence of a
strong magnetic field in the shock formation region, the heating rate is
determined with good accuracy by the absorption and emission of neutrinos in
direct URCA processes. Moreover, the influence on them of a magnetic field is
reduced to insignificant corrections.
