Absolute absorption cross sections of ozone in the 185‐ to 350‐nm wavelength range

The absorption cross sections of ozone have been measured in the wavelength range 185–350 nm and in the temperature range 225–298 K. The absolute ozone concentrations were established by measuring the pressure of pure gaseous samples in the 0.08‐ to 300‐torr range, and the UV spectra were recorded under conditions where less than 1% of the sample decomposed. The temperature dependence is significant for wavelengths longer than ∼280 nm. The absorption cross‐section values around 210 nm were found to be about 10% larger than the previously accepted values.