TY - JOUR
T1 - Fluorescence in the dissociative excitation of sulphur dioxide by electron impact
AU - Johnson, C. A F
AU - Kelly, Stephen D.
AU - Parker, John E.
PY - 1987
Y1 - 1987
N2 - Electron-impact excitation of sulphur dioxide at energies > ca. 10 eV results in optical emission from the à 3? and B~ 3S states of the SO radical. The threshold energy for production of the SO(à 3?) was found to be 10.6 ± 0.5 eV, a value similar to the minimum thermochemical energy requirements. Optical emission excitation functions for the SO(Ã) state show that in the energy region 10-20 eV an important excitation channel involves the triplet manifold of sulphur dioxide, although there is still a significant contribution from singlet excitation, particularly at higher energies. The SO(Ã) state is quenched by molecular SO2 with near-unit collisional efficiency, with an estimated rate constant of 8.4 × 10-11 cm3 molecule-1 s-1. Detailed studies on production of SO(B~) could not be undertaken owing to considerable spectral interference from molecular sulphur dioxide emission.
AB - Electron-impact excitation of sulphur dioxide at energies > ca. 10 eV results in optical emission from the à 3? and B~ 3S states of the SO radical. The threshold energy for production of the SO(à 3?) was found to be 10.6 ± 0.5 eV, a value similar to the minimum thermochemical energy requirements. Optical emission excitation functions for the SO(Ã) state show that in the energy region 10-20 eV an important excitation channel involves the triplet manifold of sulphur dioxide, although there is still a significant contribution from singlet excitation, particularly at higher energies. The SO(Ã) state is quenched by molecular SO2 with near-unit collisional efficiency, with an estimated rate constant of 8.4 × 10-11 cm3 molecule-1 s-1. Detailed studies on production of SO(B~) could not be undertaken owing to considerable spectral interference from molecular sulphur dioxide emission.
UR - http://www.scopus.com/inward/record.url?scp=0013116280&partnerID=8YFLogxK
U2 - 10.1039/F29878300985
DO - 10.1039/F29878300985
M3 - Article
SN - 0300-9238
VL - 83
SP - 985
EP - 990
JO - Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
JF - Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
IS - 6
ER -