The Air Afterglow and Its Use in the Study of Some Reactions of Atomic Oxygen

摘要: The air afterglow has been studied in a flow system by mixing the products of microwave discharge oxygen with NO or mixtures gases and measuring intensity glow immediately past point farther downstream long glass tube at known pressure, composition, linear velocity flow. greenish yellow chemiluminescence is shown to be proportional concentrations atomic nitric oxide, independent nature amount added inert gases. An average quantum (5500 angstrom) emitted for every 10$^{7}$ collisions O NO. concentration determined 'titration' NO$\_{2}$ which end-point indicated complete extinction all along tube, made possible great speed reaction + NO$\_{2}\rightarrow $ O$\_{2}$ (1) Observation spatial decay under steady-state conditions well suited study reactions oxygen. remains constant because quickly regenerates from NO$\_{2}$, light directly measures method applied give information on rates M $\rightarrow M, O$\_{3}$ SO$\_{2}$ SO$\_{3}$ etc. Some results are also presented effect disappearance following gases: N$\_{2}$, A, CO$\_{2}$, H$\_{2}$, CO, N$\_{2}$O, C$\_{6}$H$\_{6}$, SO$\_{3}$, Fe(CO)$\_{5}$, H$\_{2}$O, O$\_{3}$, C$\_{2}$H$\_{4}$, Cl$\_{2}$ Br$\_{2}$. rapid catalytic recombination discussed some detail.