science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: nitric acid					Other Names: 

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

Study: UV absorption cross sections

                
Authors: J. Du, L. Zhu

Title: Quantification of the absorption cross sections of surface-adsorbed nitric acid in the 335–365 nm region by Brewster angle cavity ring-down spectroscopy

Journal/Source: Chem. Phys. Lett., 511, 213-218, (2011); doi:10.1016/j.cplett.2011.06.062


Data: table, diagram

Energy/Wavelength range: 335 - 365 nm

Resolution: 

Temperature: 295 K

Temperature dependence: no

Pressure/Concentration: 

Phase: vapor; adsorbed on fused silica surfaces

pH:


Comments: The authors have quantified absorption cross sections of surface-adsorbed HNO3 in the 335-365 nm region at
295 K by using Brewster angle cavity ring-down spectroscopy. Absorption cross sections for HNO3 adsorbed on fused silica 
surfaces ranged between (3.1 ± 0.5) x 10-19 and (0.44 ± 0.04) x 10-19 cm2/molecule in the wavelength region studied. The 
HNO3 surface cross section values are at least two orders of magnitude larger than HNO3 cross section values of about 
< 3 x 10-22 cm2/molecule in the gas phase over the 335–350 nm range.

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