[en] Employing a neutral kaon beam at the Argonne Zero Gradient Synchrotron, a high-resolution magnetic spectrometer, and a neutron detector, differential cross sections have been obtained in the forward direction [0.045 < vertical-bar t vertical-bar < 0.18 (GeV/c)²] for the reaction K⁰/subL/p → K⁺n. Previous studies of the time-reversed process in deuterium, K⁺d → K⁰p (p), have not yielded direct cross-section measurements in the forward direction because there is an inhibition of the non-spin-flip process in deuterium due to the Pauli exclusion principle. Nevertheless, our data are in agreement with the extracted free-neutron cross sections of deuterium studies as determined from the impulse and closure approximations