Electron impact excitation of fluorescence in benzene, toluene, and aniline

Abstract

Electron impact excitation functions for fluorescence from benzene, toluene, and aniline are measured under low pressure conditions (∼1 × 10−5 torr) with an electron energy resolution of 0.3 eV. Each excitation function exhibits a number of features, including several sharp peaks at electron energies below 20 eV. Possible identifications of these features are discussed, with the result that for each molecule at least one of the low‐energy peaks is assigned as a new resonance which decays to produce the lowest excited singlet state S 1.