Knowledge Bank

The photofragment excitation (PHOFEX) spectrum of jet-cooled OCS has been measured in the vacuum ultraviolet (VUV) region between 140-160 nm. The electronically excited S($\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}S$) photoproduct, produced by tunable VUV laser photolysis, was detected by laser induced fluorescence via the $\mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}D1\mathrm{<mrow\; data-mjx-texclass="ORD">\circ </mrow>}-1S$ transition. The observed PHOFEX spectrum is better resolved than previous room-temperature and jet-cooled absorption spectra, and new features are observed. The dynamics of the photodissociation will be discussed using the measured PHOFEX spectrum, as well as the $S(1S)$ Doppler profiles.