Temperature Dependence of Chemiluminescent Reactions. I. Nitrogen Afterglow

Abstract

Using the glow discharge shock tube recently developed in this laboratory, we measured the temperature and density dependence of the Lewis–Rayleigh afterglow between 300° and 2400°K. We also determined the absolute efficiency, i.e., the rate constant of this chemiluminescent reaction. Our results can be represented by the following expression: ${\text{I\hspace{0.17em}=\hspace{0.17em}0.60\hspace{0.17em}×\hspace{0.17em}10}}^{\text{−17}}{\text{\hspace{0.17em}(T\hspace{0.17em}/\hspace{0.17em}300)}}^{\text{−0.90}}[\mathrm{N}{]}^2\mathrm{photons}\mathrm{\hspace{0.17em}/\hspace{0.17em}}{\mathrm{cm}}^3·\sec .$ The value of the integrated rate constant given includes all radiation between 500 and 700 nm.