Shape of Collision-Broadened Spectral Lines


Van Vleck and Weisskopf1, in an interesting paper, have shown that the well-known Lorentz formula for the shape of a spectral line is incorrect except at frequencies close to the resonance frequency. Since this formula has been considered to be correct for a great number of years, it may be of interest to record that, using a different method, I had reached the same conclusions2 as Van Vleck and Weisskopf. This method, although originally developed for the case of a rigid dipole oscillating about an equilibrium position, can easily be adapted to harmonic oscillators.

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  1. 1

    Van Vleck and Weisskopf, Rev. Mod. Phys., 17, 227 (1945).

  2. 2

    Addendum to Report L/T. 157 and Eeport L/T. 163 of the British Electrical and Allied Industries Research Association.

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FRÖHLICH, H. Shape of Collision-Broadened Spectral Lines. Nature 157, 478 (1946) doi:10.1038/157478a0

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