By A. D. Danilov (auth.)
I was once more than happy to profit that Plenum Press has determined to put up an English version of Chemistry of the Ionosphere. even if the ebook used to be principally meant for the Soviet reader that allows you to fill a few gaps in Russian-language experiences on aeronomic difficulties, i'm hoping that it can be necessary to international experts engaged in iono spheric learn besides. clearly, through the time which has elapsed because the practise of the Russian variation new experiences were released on this planet literature at the difficulties handled during this e-book. an important of those are famous within the ap pendix to this version, yet a few difficulties (for instance, with appreciate to the physics of detrimental ions within the decrease ionosphere) require a thorough reexamination, which can't be performed in a quick appendix. i'll be happy if booklet of the e-book in English will as sist in removal many of the at present current ambiguities in simple difficulties of higher surroundings chemistry. A. D. Danilov Preface to the Russian variation 1 within the final decade superb successes were accomplished within the research of the earth's top surroundings by way of use of rockets and synthetic satellites. those investigations have made it transparent that the higher surroundings (and rather the ionospheric sector at altitudes 100-1000 km) is a significantly extra advanced formation than should be visualized ahead of the appearance of lively reports with area vehicles.
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Extra info for Chemistry of the Ionosphere
2); therefore, radiation with a lesser wavelength may lead to formation of ions and electrons in the upper atmosphere. 13 ) The problem of the role played by this line in ionizing the lower part of the ionosphere will be considered in detail in Chap. 6. 32 ELEMENT ARY PROCESSES IN THE IONOSPHERE [CHAP. 15) The energy of a quantum (or a particle, in the case of dissociative ionization by corpuscular streams) necessary for the dissociative ionization of molecular nitrogen is approximately 25 eV (A = 495 A), and of molecular oxygen, 19 eV (A = 650 A).
4. In computing the ionization rates for different atmospheric components Hinteregger et al.  used data on the neutral composition of the atmosphere at altitudes 100-235 lan, obtained from an analysis of solar UV radiation absorption in a rocket launching of July 10, 1963 (see Chap. 1). These data on neutral composition, as is clear from Figs. 3, agree well with the most reliable data on the distribution of neutral particle concentrations in the region 100-200 km. It must be remembered that with a change in the solar activity level atmospheric conditions should change.
According to a detailed investigation described in a study by Weissler et al. , for example, the cross section of appearance of N+ ions duripg the ionization of an N2 molecule by radiation with A = 400-500 A is 1-2 orders of magnitude less than the cross section of appearance of ions. The same also applies to the appearance of 0+ ions during irradiation of the 02 molecule. 15) may be neglected. A different situation prevails for atomic nitrogen. 14). 16) where n~ is the flux of ionizing radiation with the wavelength A, and of.
Chemistry of the Ionosphere by A. D. Danilov (auth.)