Accession Number : AD0686787

Title :   INFRARED CHEMILUMINESCENCE FROM REACTIONS OF THE OXIDES OF NITROGEN WITH ATOMIC SPECIES,

Corporate Author : UTAH STATE UNIV LOGAN ELECTRO-DYNAMICS LABS

Personal Author(s) : Mechan,Lorrie E. ; Moore,William M.

Report Date : 01 MAR 1968

Pagination or Media Count : 132

Abstract : Infrared emission in the 2-5 microns region was observed for the processes which occur when active nitrogen reacts with nitrogen dioxide. Vibrational energy transfer from N2 to N2O and the reaction of N with NO2 were studied in a gas phase flow system. It was determined that the emission peaks between 2.2 and 2.4 microns as well as those around 4.5 microns were due to vibrationally excited N2O, and that the peaks between 2.6 and 2.8 microns were due to vibrationally excited NO. The transfer of vibrational energy from N2 to N2O has been shown experimentally. Using the intensity of the nitrous oxide emission at 4.5 microns as a tracer in measuring the concentration of vibrationally excited nitrogen, the decay of vibrational energy in nitrogen was studied as a function of nitrous oxide and nitrogen dioxide concentrations. Conclusions based upon these observations are presented. No other emission was found that can be directly attributed to NO2. The complex of reactions occurring in the active-nitrogen dioxide system is described. It was concluded that the titration of N with NO and O with NO2 is accurate and the mechanisms on the basis of presence of NO and N2O as shown by their infrared emission are presented. (Author)

Descriptors :   (*NITROGEN OXIDES, *CHEMILUMINESCENCE), (*AFTERGLOWS, NITROGEN OXIDES), INFRARED SPECTRA, NITROGEN, MOLECULAR ORBITALS, VIBRATION, REACTION KINETICS, ATOMIC ENERGY LEVELS

Subject Categories : Radiation and Nuclear Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE