UV absorption cross-sections of cis-BrONO

UV absorption cross-sections for cis-BrONO in the gas phase have been measured over the wavelength range 200–365 nm. Absorption measurements were made following cw photolysis of Br2 in Br2/NO2/N2 mixtures in a 100 cm long temperature-regulated absorption cell. The cis-BrONO absorption spectrum shows two maxima in this wavelength range: at 228 nm (2.7×10−18 cm2 molecule−1) and 316 (0.41×10−18 cm2 molecule−1). cis-BrONO absorption cross-sections were determined relative to BrNO2.