Extinction coefficients of NO2 and N2O4

Abstract

The extinction coefficient of NO₂ has been measured in the spectral range 185 to 410 nm as a function of temperature between 235 and 298 K. In order to correct for the effect of the dimer absorption, the extinction coefficient of N₂O₄ has also been measured. The effect of a decrease in temperature upon the NO₂ absorption is a reduction in the extinction coefficient of approximately 10 percent in the range 320 to 380 nm.