Electron-impact excitation of sulphur dioxide at energies greater than the threshold energy (3.85 ± 0.4 eV) results in optical emission mainly from the B~ 1B1 state of sulphur dioxide. Optical emission excitation functions have been determined at several wavelengths and demonstrate that the primary excitation process(es) is dominated by production of optically forbidden triplet states. The observed emission arises from intersystem crossing from these triplet states into the fluorescing B~ 1B1 state.
|Number of pages||6|
|Journal||Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics|
|Publication status||Published - 1987|