Collisional broadening and shift of neutral argon spectral lines
- 1 October 1976
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 14 (4), 1421-1427
- https://doi.org/10.1103/physreva.14.1421
Abstract
The collisional self-broadening and shift of neutral argon spectral lines have been determined as a function of atom density for several lines terminating on either the lower resonance or lower metastable levels. The lines were emitted by a variable-pressure discharge tube equipped with intracapillary thermocouples, and were observed using a pressure-scanned Fabry-Perot interferometer. The line profiles were analyzed using a least-squares fit of Whiting's Voigt function to all profile intensity points. Particular attention was given to the determination of the gas temperature, from which was calculated. The contribution of nonresonant interactions to the broadening and shift of lines connected to the ground state via resonant transitions was examined using the analysis of Lewis.
Keywords
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