Photon and high-energy–electron-impact vibronic excitation of molecular hydrogen

We have obtained generalized oscillator strengths, in the framework of the first Born approximation, for the electron-impact excitation of [Formula Presented] through the [Formula Presented] [Formula Presented] and [Formula Presented] vibronic transitions. The target electronic wave functions, previously used to determine electron-impact dissociation cross sections for the same transitions [Phys. Rev. A 57, 1025 (1998)], were calculated at the configuration-interaction level for several internuclear distances. The discrete vibrational wave functions were generated by solving the vibrational Schrödinger equation in the Born-Oppenheimer scheme. The Franck-Condon approximation was not invoked. Optical oscillator strengths for the same transitions were also obtained and compared favorably with previous theoretical and experimental results. The calculated generalized oscillator strengths presented good agreement with recent measurements by Zhong et al. [J. Electron Spec. and Rel. Phen. 94, 127 (1998)] for the [Formula Presented] and [Formula Presented] vibronic transitions. © 1999 The American Physical Society.