Measurement of the Photoionization Cross Section in the Resonance Continuum of Carbon-I.
Final rept. Mar 68-Nov 70,
UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF PHYSICS
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A wall-stabilized high-current 100 A arc was operated in argon at a pressure of one atmosphere, and critical plasma properties such as temperature, electron-, ion-, and atom-densities have been determined by spectroscopic observations in the visible and in the vacuum ultraviolet regions of the spectrum, assuming local thermal equilibrium. By adding CO2 gas to the argon, the density of carbon atoms in the plasma could be measured. These values, together with the arc emission intensities in the vacuum uv region between 980A and 1250A, provided sufficient data to allow the calculation of the photoionization cross section of carbon. This experimental value compared well with those theoretical calculations which have been previously published. Author
- Physical Chemistry