Effective cross sections for the (n, 2pn), (n, 2p), and (n, 3pn) reactions using intermediate-energy neutrons

"Effective cross sections" for the ($n, 2pn$), ($n, 2p$), and ($n, 3pn$) reactions on various targets were measured relative to the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}(n, 2n){}_{}{}^{11}{}_{}{}^{}\mathrm{C}$ reaction. The bombarding particles were the spectrum of neutrons generated in a Cu beamstop by 750-MeV protons. The cross section systematics as a function of target mass number are compared with available 14-MeV neutron cross sections for ($n$, ${}_{}{}^3{}_{}{}^{}\mathrm{He}$) and ($n, 2p$) reactions and with results from intranuclear-cascade calculations.