Doubly differential cross section for the ionization of the hydrogen molecule by the impact of 100-eV electrons

Doubly differential cross sections (DDCS) for the molecular single (H₂⁺) and dissociative single (H+H⁺) ionization of the hydrogen molecule have been measured employing the ejected-electron and produced-ion coincidence technique for an incident electron energy of 100 eV and ejected-electron energies between 20 and 80 eV. Angular variations of partial and total DDCS's have also been measured in experiments in which electrons are detected at angles between 2^∘{} and 110^∘{} relative to the direction of the incident electrons. A comparison of the present measurements has been made with the data from the published literature.