Issue 31, 2006

Absorption cross sections for the à 2A″ (0,90,0) ← [X with combining tilde]2A′ (0,01,0) band of the HCO radical

Abstract

Absorption cross sections for the à 2A″ (0,90,0) ← [X with combining tilde] 2A′ (0,01,0) band of HCO were determined at 295 K using pulsed laser photolysis combined with cavity ring-down spectroscopy. Formyl radicals (HCO) were produced from the reaction of atomic chlorine, generated by photolysis of Cl2 at 335 nm, with formaldehyde. The concentration of HCO was calibrated using two independent photochemical methods. The peak cross section of the P(8) line was determined to be (1.98 ± 0.36) × 10−18 cm2, and the intensity of the entire band was normalized to this line. The quoted 2σ uncertainty includes estimated systematic errors. Comparisons to previously reported values of HCO cross sections in this band are discussed.

Graphical abstract: Absorption cross sections for the à 2A″ (0,90,0) ←  [[X with combining tilde]]  2A′ (0,01,0) band of the HCO radical

Supplementary files

Article information

Article type
Paper
Submitted
22 May 2006
Accepted
19 Jun 2006
First published
04 Jul 2006

Phys. Chem. Chem. Phys., 2006,8, 3636-3642

Absorption cross sections for the à 2A″ (0,90,0) ← [X with combining tilde] 2A′ (0,01,0) band of the HCO radical

J. E. Flad, S. S. Brown, J. B. Burkholder, H. Stark and A. R. Ravishankara, Phys. Chem. Chem. Phys., 2006, 8, 3636 DOI: 10.1039/B607185F

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