By A. Nelson Wright
Actual Chemistry, a sequence of Monographs: energetic Nitrogen offers the equipment wherein lively nitrogen will be produced. This ebook consists of 5 chapters that evaluation the power content material, molecular spectrum, and the emission of energetic nitrogen. many of the issues coated within the e-book are the precis of light-emitting platforms of energetic nitrogen; research of Long-Lived Lewis-Rayleigh Afterglow conception and Ionic conception of Mitra; reactions via precipitated mild emission; and features of homogeneous recombination. different chapters care for the research of metastable molecule theories and the mechanisms for reactions of lively nitrogen concerning direct N(4S) assault. The dialogue then shifts to the speed constants for reactions triggered by means of direct N(4S) assault. The overview of the Short-Lived vigorous Afterglow conception is gifted. the ultimate bankruptcy is dedicated to the exam of emission from molecular species with digital strength degrees lower than 9.76 eV. The publication delivers valuable info to physicists, scholars, and researchers.
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Extra resources for Active Nitrogen
02 sec at a pressure of 100 torr. The "auroral" afterglow produced by Brömer and Frette, with a radiofrequency discharge, showed an initial decrease in intensity of the second positive bands with time of decay (410). 8 torr, by an increase to a maximum value. Emission of the second positive bands in the Lewis-Rayleigh afterglow was reported by Ruark et al. 2 torr when a trace of mercury was present (411, 412). Their emission from the afterglow of "pure" nitrogen was first reported by Hamada (314).
Dependence on Addition of Trace Amounts of Gases Such as Oxygen Consideration will be given here only to the effects on afterglow emission of traces of additives, such that no noticeable quenching of the afterglow or chemical reaction of the additive occurs. The effects of larger concentra tions will be discussed later (Chapter 5). The effect of small amounts of 0 2 on the nitrogen afterglow has long been a matter of controversy. Von Mosengeil showed, quite early, that the afterglow could be produced in nitrogen completely free of oxygen (266), and Baker and Strutt contended that the best nitrogen afterglow was produced with nitrogen as free from 0 2 as possible (267).
Argon and helium appear to be more effective than N 2 itself as a third body in promoting the homogeneous recombination of N(4S) atoms leading to afterglow emission. 5 by He and Ar, respectively (262a), or to be increased by a factor of about 25 by Ar or He (235). In the presence of excess (99%) helium, approximately 75% of the atomic nitrogen recombinations appear to contribute, ultimately, a photon in the nitrogen first positive system (263). This corresponded to a rate constant of approximately 3 x 10~32 cc2 sec - 1 for excitation of N2(B 3Π9) with He as the third body.
Active Nitrogen by A. Nelson Wright