Influence of Interatomic Collisions on Intra-Doppler Absorption Resonances in Thin Gas Cells

The influence of interatomic collisions in a gaseous medium on intra-Doppler resonances of absorption of optical radiation in a thin gas cell was theoretically studied and could be recorded by recently developed laser spectroscopy methods. The limitations on the pressure of the gaseous medium at which the influence of such collisions on the width of these resonances was insignificant were determined. The results could find application in ultra-high resolution atomic spectroscopy and in compact optical frequency standards based on the thin gas cells under consideration.