Quantum yields for OH production from 193 and 248 nm photolysis of HNO3 and H2O2

Article abstract of DOI:10.1063/1.464735

The absolute quantum yields (Φ) for OH production from 193 and 248 nm photolysis of HNO3 and H2O2 are measured at room temperature using flash kinetic spectroscopy in a flow tube.The OH radicals are produced by excimer laser photolysis and probed via direct absorption of high resolution, tunable IR laser light.The resulting quantum yields are found to be Φ₁₉₃^HNO3 = 0.47+/-0.06, Φ₁₉₃^H2O2 = 1.22+/-0.13, Φ₂₄₈^HNO3 = 0.75+/-0.10, and Φ₂₄₈^H2O2 = 1.58+/-0.23.These results indicate quantum yields for both precursors at both wavelengths which are less than the maximum possible values of 1 for HNO3 and 2 for H2O2.The present measurements are discussed in light of contrasting results suggested from other work.

Full text of DOI:10.1063/1.464735

Quantum yields for OH production from 193 and 248 nm photolysis of HNO3 and
H2O2
A. Schiffman, D. D. Nelson Jr., and D. J. Nesbitt
Citation: The Journal of Chemical Physics 98, 6935 (1993); doi: 10.1063/1.464735
View online: http://dx.doi.org/10.1063/1.464735
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/98/9?ver=pdfcov
Published by the AIP Publishing
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