New PDF release: Active Nitrogen

By A. Nelson Wright

ISBN-10: 0123955106

ISBN-13: 9780123955104

Actual Chemistry, a chain of Monographs: lively Nitrogen provides the equipment through which lively nitrogen will be produced. This booklet consists of 5 chapters that review the strength content material, molecular spectrum, and the emission of lively nitrogen. a number of the themes lined within the publication are the precis of light-emitting structures of lively nitrogen; research of Long-Lived Lewis-Rayleigh Afterglow idea and Ionic thought of Mitra; reactions by way of caused mild emission; and features of homogeneous recombination. different chapters take care of 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 way of direct N(4S) assault. The evaluate of the Short-Lived lively Afterglow concept is gifted. the ultimate bankruptcy is dedicated to the exam of emission from molecular species with digital power degrees lower than 9.76 eV. The ebook provides valuable info to physicists, scholars, and researchers.

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Extra resources for Active Nitrogen

Example text

The latter's investigation showed that the bands were emitted at ordinary temperatures only in very pure nitrogen. They were enhanced, relative to the second positive bands, by an increase of pressure. Their intensity was markedly increased at low temperatures, and especially at the temperature of liquid air. They also appear to be emitted in the "light of the night sky" (346, 419), from the aurora (303, 346), from nitrogen that has been mildly excited with an "ozonizer-type" discharge (91,307) or with a Tesla coil (91), from nitrogen excited by 50 keV electrons (366b), and from discharges through argon-oxygen-nitrogen mixtures (348).

The use of a 21-foot grating vacuum spectrograph then permitted Wilkinson and Houk to make high-resolution measurements on emission in the vacuum UV region of the spectrum (330). The band system has now been observed in auroral spectra with rocketborne spectrometers, (303, 331), and relative intensities have been measured for //. 76 eV 33 50 of its major bands excited in a high-voltage discharge through nitrogen (332). Extensive measurements on the bands in absorption (magnetic dipole or electric quadrupole interaction) were also made in about 1956 (333-335), and have been continued in recent years (336, 337,337a).

Light Emission from Active Nitrogen Systems rotational development of the bands, has recently permitted him to observe some new bands that originate in the tenth and eleventh vibrational levels of the upper state and which are overlapped in the usual sources (429). A number of bands of the first negative system not yet discovered (a gap in the Deslandres table) would be weakly degraded, and also coincide with strong bands of this system, or of the second positive system of N 2 . Tyte has pointed out that the more or less continuous background due to these missing bands (in the region 3075-5058 Ä) may be a cause of error in intensity measurements on the first negative and second positive systems.

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Active Nitrogen by A. Nelson Wright

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