science-softCon uv/vis spectra data base;	 	www.uv-spectra.de, (C) science-softCon 2008

Substance: nitric acid				Other Names:

Formula: HNO3					CAS-No.: 7697-37-2

Study: spectroscopy study


Authors: S. S. Brown, R. W. Wilson, A. R. Ravishankara

Title: Absolute Intensities for Third and Fourth Overtone Absorptions in HNO3 and H2O2 Measured by Cavity Ring Down Spectroscopy

Journal: J. Phys. Chem. A, 104 (21), 4976 -4983, (2000), 10.1021/jp000439d S1089-5639(00)00439-4 


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Comments: Photodissociation of nitric acid and hydrogen peroxide via high-lying O-H overtone absorptions in the visible may act 
as a source of OH radicals in the atmosphere. 
The authors have used cavity ring down spectroscopy to measure the absorption cross sections for the third (4nyOH) and fourth (5nyOH) overtone 
transitions in these molecules. The integrated cross sections are (2.25 ± 0.15) × 10-21 and (2.57 ± 0.24) × 10-22 cm2 molecule-1 cm-1 for 4nyOH 
and 5nyOH in nitric acid, respectively, and (4.58 ± 0.39) × 10-21 and (5.67 ± 0.52) × 10-22 cm2 molecule-1 cm-1 for 4nyOH and 5nyOH in hydrogen peroxide.

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