Direct measurement of the transition dipole moment of the {nu}{sub 3} asymmetric C-H stretching vibration of the methyl radical
Conference
·
OSTI ID:456854
- Argonne National Lab., IL (United States)
A direct measurement of the transition dipole moment, {mu}{sub 3}, of the v{sub 3} asymmetric C-H stretching vibration of the methyl radical has been made in a transverse-flow reactor using laser-photolysis transient infrared absorption spectroscopy. Cyano (CN) radicals (and Cl atoms) were produced by excimer laser photolysis of ClCN at 193 nm and reacted with methane to give both CH{sub 3} and HCN (and HCl). The intensities of 18 rotational lines of the v{sub 3} fundamental band were measured relative to the R(8) line of the v{sub 3} C-H stretching vibration of HCN. The transition dipole moment of the methyl radical was determined to be {mu}{sub 3} = 0.0327{+-} 0.0027 D using the known absolute absorption cross section of the v{sub 3} vibration of HCN.
- OSTI ID:
- 456854
- Report Number(s):
- CONF-9506113--
- Country of Publication:
- United States
- Language:
- English
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