Total Neutron Yields from Light Elements under Proton and Alpha Bombardment

Total neutron production cross sections have been measured for targets of D, T, ${\mathrm{Li}}^7$, ${\mathrm{Be}}^9$, ${\mathrm{B}}^{11}$, ${\mathrm{C}}^{13}$, ${\mathrm{C}}^{14}$, and ${\mathrm{F}}^{19}$ under proton bombardment and of ${\mathrm{Li}}^7$, ${\mathrm{Be}}^9$, ${\mathrm{B}}^{10}$, and ${\mathrm{Si}}^{29}$ under alpha-particle bombardment. Energy ranges covered differ, but were contained between threshold and 5 Mev for protons and between threshold and 9 Mev for alphas. In several cases cross sections for the inverse reactions, ($n, p$) and ($n, \alpha$), have been computed and compared, where available, with direct measurements.