Observation of Non-Lorentzian Spectral Line Shapes in Na-Noble-Gas Systems
- 22 September 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 45 (12) , 986-989
- https://doi.org/10.1103/physrevlett.45.986
Abstract
This Letter reports observations showing that the spectral line shape in the core region of collision-broadened lines contains a dispersion component in addition to the usual Lorentzian. The physical origin of this component is the finite duration of the collisions. For the Na lines and Xe perturbers, the dispersion component produces an 8% asymmetry 0.1 Å from line center. Calculations based on recent line-broadening theories predict a dispersion component with an amplitude comparable to our experimental results.
Keywords
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