Stimulated generation of neutrinos by nucleons in a magnetic field

The full probabilities of $n \rightarrow n+\nu + \overline{\nu}$ and $p \rightarrow n + e^{+}+\nu_{e}$ processes in a magnetic field are calculated. The contribution of the $n \rightarrow n+\nu + \overline{\nu}$ process in generating neutrinos is estimated as compared with normal $\beta$-decay. In the case of $p \rightarrow n + e^{+}+\nu_{e}$ decay, the spins of the engendered neutrinos will be primarily oriented opposite the field. It is shown that in fields with an induction of $B<B_{0}\sim 3 \cdot 10^{17}$ G the decay of the resting proton is prohibited, while its lifetime is rapidly reduced with a rise in the field, which may noticeably impact on the $n-p$ balance of magnetic neutron stars.