Electron impact excitation of high vibrational levels of the H2, NO and O2ground states

A new and sensitive electron impact spectrometer has been used to observe pure vibrational excitation in H 2 , NO and O 2 . The excitation of vibrational levels of their ground states with over 4 eV energy has been observed. This excitation is produced by the decay of unbounded resonant states along the path which can eventually end in dissociation (dissociative attachment).