HCN absorption line shapes studied by millimeter wave coherent transients: speed dependent effects and collision interaction potential.

Autor: Rohart, François, Kaghat, Fahd
Předmět:
Zdroj: AIP Conference Proceedings; 10/29/2010, Vol. 1290 Issue 1, p209-213, 5p, 1 Chart, 3 Graphs
Abstrakt: The 86 GHz transition of HC15N in collision with rare gases has been studied in the 130-300 K temperature range by a using coherent transient technique. Strong departures from the Voigt profile are observed. They are clearly related to a dependence of relaxation rates on absorber speeds, whereas velocity/speed changing collisions (Dicke effect) have quite a small influence, even in the Doppler regime. From a detailed analysis of temperature dependences of relaxation rates, a more realistic modeling of collisional cross sections is presented. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index