Studies of vibronic excitations of H₂by electron impact

Abstract

The authors report rotationally unresolved vibro-electronic cross sections and branching ratios associated with the X 1 Sigma +g to d 3 Pi u electronic transition in H2, using the distorted-wave approximation within the adiabatic-nuclei framework. The present study shows that the Franck-Condon approximation (FCA) can provide reliable cross sections. The calculated branching ratios associated with the vibro-electronic transitions exhibit some oscillations at low energies; however, their magnitudes agree well with the FCA predictions.