T. Efthimiopoulos et al., MEASUREMENT OF THE COLLISIONAL LINE BROADENING CROSS-SECTIONS AND ASYMMETRY FOR POTASSIUM RARE-GAS PAIRS, Journal of physics. B, Atomic molecular and optical physics, 27(14), 1994, pp. 3017-3024
The collisional broadening cross sections of potassium with the rare g
ases He, Ne and Ar were measured, using a new absorption-polarization
method, which involves the Faraday rotation near an atomic resonance.
These cross sections above and below the resonance transitions 4S1/2-4
P1/2.3/2 show an asymmetry of the broadenings. The interaction time of
the potassium-rare gas pair was found to increase from 0.3 ps for He
to 1.3 ps for Ar.