Fluorescence of CS2 excited to the third excited singlet state

Abstract

Weak fluorescence from CS₂ vapour excited in the 200–220 nm region has been observed between 220 and 360 nm, with a maximum quantum yield of ∼ 10^–3. From the corrected fluorescence excitation spectrum, the variation in fluorescence quantum yield with excess energy was determined and shown to decline by an order of magnitude over the wavelength range 220 to 200 nm. This decrease was attributed to the increase in importance of photodissociation with increasing photon energy.