Dissociative electron attachment to hydrogen

Using two different crossed-beams high-resolution electron attachment instr uments (employing either a trochoidal electron monochromator or a hemispher ical electron monochromator) we have determined the cross section curve for H- production from H-2 via the 4 eV resonance at two different temperature s. These relative partial cross sections have been calibrated by comparing present values for the 14 eV resonance with absolute total cross sections d etermined previously. Taking into account the experimental energy distribut ion and the rotational excitation and its influence on the cross section sh ape we obtain very good agreement with theoretical predictions in terms of both the shape and magnitude of this resonance peak.