Ar40(p,n)K40Reaction from Threshold to 5.0 MeV

Excitation functions have been obtained for the reaction ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}\mathrm{}(p,n)\mathrm{}{}_{}{}^{40}{}_{}{}^{}\mathrm{K}$ from threshold to 5 MeV. For bombarding energies between threshold and 3.7 MeV, a long counter was used to measure the total cross sections and the differential cross sections at 0° and 90°. Between proton bombarding energies of 3.3 and 5.0 MeV, time-of-flight techniques were used to measure the excitation functions at 0° for two neutron groups. Pronounced resonant structure was observed throughout the proton energy range. The results are compared with expected energies for isobaric analogs of states in ${}_{}{}^{41}{}_{}{}^{}\mathrm{Ar}$. Neutron partial widths are given for selected resonances.