Electron Recombination Coefficient Measurements in Nitrogen at Low Pressures

Abstract

Articles you may be interested inGlobal rate coefficients for ionization and recombination of carbon, nitrogen, oxygen, and argon Phys. Plasmas 19, 073515 (2012); 10.1063/1.4737147Retardingfield analyzer for measurements of ion energy distributions and secondary electron emission coefficients in lowpressure radio frequency discharges Rev.solution near the germanium-indium interface is not saturated, until equilibrium conditions are established. This nonsaturated condition can therefore differentiate between atomic planes with different solution rates, thus resulting in the observed anisotropic rate of solution of the germanium by the indium. Similar results have been noted in the solution of germanium and silicon by liquid aluminum. 8 As the temperature is 8 J. H. Wernick, "Effects of crystal orientation, temperature, and molten zone thickness in temperature-gradient zone melting," J. Metals (to be published).increased, the solution rate is also increased, thus affecting the concentration gradient, which in turn increases the rate of movement of the interface. ACKNOWLEDGMENTSThe authors wish to extend their thanks to G. C. Messenger for his suggestions and discussions during the course of this work, to H. Segal and R. Mittenger for the preparation of the various alloys, and to E. Murt for the spectrographic analysis of the samples.

Active Nitrogen.

“…Its formation probably is due to N + N02 -* N20 + O (47) Using presently accepted values for specific rates of subsequent reactions, a value for fc4s of 1.7 X 10-14 wras deduced.…”

“…The difference in values obtained in regular and active nitrogen was explained on the basis of long-lived molecular ions originating in the discharge. Some of the earlier observations in active nitrogen have been attributed to the presence of molecular ions (21,47). Ionization of NO during the recombination of nitrogen atoms (with the NO as the third body) also has been advanced as the electron source (94).…”

Study of the Temperature Dependence of Electron-Ion Recombination in Nitrogen

“…As.a consequence, many of the previous recombination studies may not apply to the ion assumed to be present, e.g., N2 + , leading to much confusion in the literature. [7][8][9][10][11][12][13] In several of the reported nitrogen recombination studies 11 " 15 the measurements have been extended over a range of temperatures. Most of these studies were conducted without the benefit of mass analysis or any a priori knowledge concerning the identity of the dominant ion species.…”

An observation of the (0, 0) negative band of N2+in the dayglow

“…It is now believed, for example, that dissociative recombination may sometimes be a rapid process with a rate coefficient of the order of 10 -• cm•/sec [Bates, 1950], and that ion-atom interchanges may occur with rate coefficients as large as 10-' cm'/sec [Dalgarno, 1961]. On the other hand, nonresonant, asymmetric charge-transfer reactions are expected to be comparatively slow at thermal energies with rate coefficients typically less than 10-" Many workers [Biondi and Brown, 1949;Bryan et al, 1957;Faire et al, 1958;Faire and Champion, 1959;Bromer, 1960;ZipS, 1961;Kasner et al, 1961;Mentzoni, 1963;Kasner and Biondi, 1964] have reported values for the volume recombination coefficient in nitrogen. In some of these experiments the effects of diffusion [Gray and Kerr, 1962] were not taken into account, so that the reported values substantially overestimate the magnitude of the recombination coefficient.…”