Electron Emission inH2+-H2Collisions from 0.6 to 1.5 MeV

Cross sections, differential in emission energy and angle, have been measured for the ejection of electrons in collisions of ${\mathrm{H}}_2^{+}$ ions with molecular hydrogen. Incident-ion energies studied were 0.6, 1.0, and 1.5 MeV and electron emission was measured over the laboratory angular range of 20°-125°. Electron-emission cross sections are compared with measurements for incident protons having the same velocity as the ${\mathrm{H}}_2^{+}$ ions. Electron distributions attributable to dissociative ionization of the ${\mathrm{H}}_2^{+}$ ion are integrated to obtain the total cross section for dissociative ionization. A comparison is made between measured differential cross sections for scattering the bound electron of the incident ion and cross sections for scattering of incident free electrons.