Physical Chemistry, A Series of Monographs: Active Nitrogen presents the methods by which active nitrogen may be produced. This book is composed of five chapters that evaluate the energy content, molecular spectrum, and the emission of active nitrogen. Some of the topics covered in the book are the summary of light-emitting systems of active nitrogen; analysis of Long-Lived Lewis-Rayleigh Afterglow theory and Ionic theory of Mitra; reactions followed by induced light emission; and characteristics of homogeneous recombination. Other chapters deal with the analysis of metastable molecule theories and the mechanisms for reactions of active nitrogen involving direct N(4S) attack. The discussion then shifts to the rate constants for reactions induced by direct N(4S) attack. The evaluation of the Short-Lived Energetic Afterglow theory is presented. The final chapter is devoted to the examination of emission from molecular species with electronic energy levels below 9.76 eV. The book can provide useful information to physicists, students, and researchers.

LIGHT EMISSION FROM ACTIVE NITROGEN SYSTEMS; AFTERGLOW SPECIES, THEIR LIFETIMES AND CONCENTRATIONS; THEORIES OF ACTIVE NITROGEN; CHEMICAL REACTIONS OF ACTIVE NITROGEN.

An investigation of the physical properties of active nitrogen in low-density flow indicates that active nitrogen may be used for flow visualization without introducing excessive disturbances in the stream. Quantitative measurements of density in the flow may be obtained from certain restricted regions of the spectrum of the afterglow. The results are shown to disagree with Mitra's theory of the afterglow. The results appear to require that active nitrogen contain metastable molecules. Methods are described for the use of active nitrogen in shock tubes.