Optical emission spectra produced by electron impact excitation of benzene

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Abstract
Optical spectra excited by low energy electron impact on benzene show the characteristicfluorescence (S 1→S 0, 1 B 2u →1 A 1g ) of the parent molecule. At energies above 50 eV this benzene emission becomes weak and fragment emission from H, C, CH, and C2 predominates. In addition, at high electron energy an underlying continuum (or possibly many, closely‐spaced lines) is present throughout the 220–520 nm spectral region. This continuum is responsible for the broad peak at ∼150 eV in the previously reported excitation function for wavelengths corresponding to the benzene fluorescence. The emitter of the continuum radiation has not been identified.

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