On classical collision broadening

А. П. Коузов

F. W. Byron

Mark W. Zemansky

Peter Jungner, Birger Stahlberg, Stig Stenholm

E. W. Weber, Klaus Peter Jungmann

Joel I. Gersten, Henry M. Foley

The combined effect of Doppler and collision broadening of spectral lines is studied by means of the statistical correlation function for the time-varying amplitude of classical oscillators. It is shown that at high pressures (mean-free path smaller than wavelength) the line shape is lorentzian with a width which is the sum of the conventional collision broadening and a Doppler contribution which decreases with increasing pressure, consistent with Dicke’s result.