Abstract

In our investigation of charge-transfer complexes, we have observed emission from the photoproducts of benzene in the gaseous phase. KrF 248 nm radiation from an excimer laser was incident upon the experimental gases contained in a glass vessel with suprasil windows. Emission was detected in the orthogonal direction by a photomultiplier tube mounted at the exit slit of a monochromator. The incident energy at the input window at 248 nm was ~400 mJ (beam area ~2 cm², FWHM Δt~20 ns, FWHM Δv~5 nm) . Benzene (Fisher, 99.95% pure, Thiophene ≲ 0.5 ppm) and O₂ (99.996% pure) were used without further purification. The cell was evacuated to pressures ~10^-7 mbar and flushed out at least twice before experiments were performed.

© 1984 Optical Society of America