[en] A set of 43 momentum spectra from the inclusive reaction np→pX⁰ was measured with good statistical accuracy at 1.39, 1.56, 1.73 and 1.90 GeV/c (about 10 spectra per incident momentum), with a neutron beam obtained by stripping deuterons. The final proton was analysed in an angular region of between 0⁰ and 20⁰ in the laboratory by a magnetic spectrometer. The set of these results is analysed in terms of the pion exchange model using the parametrization of Duerr-Pilkuhn and Benecke-Duerr. The differential cross sections dsigma(np→pΔ⁰₃₃)/dt are determined from the experimental spectra. (Auth.)