Abstract

Direct determinations of the concentration of electrons in flame gases were needed to justify the method, described in the preceding paper, to eliminate the distortion of intensity-density curves due to ionization of the metallic flame additives. Measurements of the attenuation of a microwave beam upon crossing a column of flame gases were performed, and electron concentrations in an acetylene-air flame (T = 2500°K) containing one or mixtures of two alkali elements were obtained. The results indicate that the ionization of the metallic flame additives is thermally equilibrated in the flame zone chosen for the optical line-intensity measurements.

© 1961 Optical Society of America

Optical Cross Section of Resonance Lines Emitted by Flames under Conditions of Partial Thermal Ionization*†

Fritz W. Hofmann and Hedwig Kohn
J. Opt. Soc. Am. 51(5) 512-521 (1961)

Measurement of Particle and Gas Temperatures in a Slightly Luminous Premixed Flame

Roger C. Millikan
J. Opt. Soc. Am. 51(5) 535-542 (1961)

Spectroscopic Studies of Ionization in a Hollow-Cathode Discharge

Kenneth B. Mitchell
J. Opt. Soc. Am. 51(8) 846-853 (1961)

Microwave Modulation of Light Using the Kerr Effect*

D. F. Holshouser, H. Von Foerster, and G. L. Clark
J. Opt. Soc. Am. 51(12) 1360-1365 (1961)

Hydrocarbon Flames as Reference uv Light Sources

Ulrich Bonne and Richard E. Berg
J. Opt. Soc. Am. 60(10) 1285-1289 (1970)