Spectral line broadening in air molecule systems.
Broadening of the spectral lines by resonance and Van der Waals forces in the Schumann-Runge system of O(2), the first and second positive systems of N(2), the beta and gamma systems of NO and the first negative system of N(2)(+) is treated by means of the impact approximation. At temperatures of 1000 degrees K and higher, the broadening effect of the resonance forces is negligible; there is hence no J dependence in the widths. Van der Waals constants are calculated for the electronic-vibrational levels of interest using available discrete and continuous oscillator strengths. Half-widths in the various systems have been computed for 0 <or= nu, nu' <or= 12, 1000 degrees K T 18,000 degrees K and rho/rho(0) = 10,10(-1). In general, there is not much width variation with vibrational band in a system.
Breene
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Physical Studies, Inc., Reno, Nevada 89502, USA.