language: de

Die spezifische Verbreiterung der Fel-Resonanzlinie 3859,91 Ä durch Stöße mit Argonatomen bei hohen Temperaturen

J. Steinwandel, V. E. Joos, M. Hauser, and Th. Dietz
Institut für Physikalische Chemie der Universität Stuttgart,
Z. Naturforsch. 35a, 828-831 (1980);

[eingegangen am 10. April 1980]

[Specific Line-Broadening of the Iron-Resonance-Line 3859,91 A by Collisions with Argon Atoms at Mgh Temperatures]

The specific line-broadening cross section of the Fel-resonance transition at 3859.91 A by collision with argon atoms was measured in the temperature range of 2000 K ^ 2* 5^3500 K in a shock tube. Driving gas was Helium, shock wave carrier gas and collision partner was Argon. The free iron atoms were produced by the unimolecular decomposition of ironpentacarbonyl in the front of the incident shock wave. The initially produced iron condensate evaporates completely in the reflected shock wave to form free atoms. They are present behind the reflected shock wave in the form of a thermodynamically well defined undersaturated vapour. Thermodynamic quantities of the vapour do not change during the observation time. The line-broadening cross section a^T ) was measured by the method of integral atomic line absorption spectroscopy on the Fel-resonance line at 3859.91 A to ( 10.05 ±1.40 ) x 10 -15 cm 2. Temperature variations in a^ are smaller than experimental errors.

Einleitung