We apply the adiabatic nuclei convergent close-coupling method to electron-impact dissociative excitation of H2 in the low energy regime. Differential and integrated cross sections are presented for excitation of the b 3 Σ + u state, the primary pathway to dissociation of H2 at low energies. Agreement with experiment is satisfactory. Results are also presented for the isotopologues D2, T2, HD, HT, and DT, which show a pronounced isotopologue effect near threshold in both the differential and integrated cross sections.

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g singlet states of molecular hydrogen from all vi = 0-14 vibrational levels of the ground X 1 Σ + g state. Calculations are performed using the adiabatic-nuclei convergent closecoupling method formulated in prolate spheroidal coordinates from threshold to 500 eV. Agreement with previous calculations varies with transition and impact energy, ranging from excellent to poor. Agreement with available experiment is generally good.