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The Effect of Collisions upon the Doppler Width of Spectral Lines

R. H. Dicke

  • Palmer Physical Laboratory, Princeton University, Princeton, New Jersey

Phys. Rev. 89, 472 – Published 15 January, 1953

DOI: https://doi.org/10.1103/PhysRev.89.472

Abstract

Quantum mechanically the Doppler effect results from the recoil momentum changing the translational energy of the radiating atom. The assumption that the recoil momentum is given to the radiating atom is shown to be incorrect if collisions are taking place. If the collisions do not cause broadening by affecting the internal state of the radiator, they result in a substantial narrowing of the Doppler broadened line.

References (2)

  1. E. Fermi, Revs. Modern Phys. 4, 105 (1932)
  2. H. M. Foley, Phys. Rev. 69, 616 (1946)

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