Deuteron-Induced Reactions

A simple semiclassical model is described for the computation of $d-p$ and $d-n$ cross sections. It is found that the stripping process is responsible for practically the entire observed $d-p$ cross section at any bombarding energy $E_d$. The few available quantitative $d-p$ measurements—for ${\mathrm{Na}}^{23}$, ${\mathrm{Co}}^{63}$, ${\mathrm{Br}}^{81}$, and ${\mathrm{Bi}}^{209}$—agree with curves calculated by assuming that only the stripping process is effective. As $E_d$ increases above the barrier height of the target nucleus, the measured $d-p$ cross sections diminish; this is interpreted as due to effective $d-n$ competition, in which the excited nucleus re-emits a neutron after acquiring one in the $d-p$ stripping process. It is expected that the $d-n$ excitation curves are also predominantly due to the stripping process for incident energies $E_d\lesssim 10$ Mev.