Spektroskopische Untersuchung unelastischer Stöße zwischen Ionen oder metastabilen Atomen der Edelgase und Alkalimetallatomen bei thermischen Stoßenergien
✍ Scribed by D. Vogel; Yu. A. Tolmachev
- Book ID
- 102814458
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 785 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0005-8025
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✦ Synopsis
Abstract
The present work deals with the spectroscopic investigation of Penning ionization and nonresonant charge exchange due to thermal‐energy collisions of metastable atoms or ions of the inert gases He, Ne with atoms of alkali metals K, Rb, Cs in a low temperature plasma of the corresponding binary mixtures. The rate constants of these reactions and partial rate constants of exciting several alkali metal ion levels were determined by the kinetics of the decay of ionized and excited particles in the afterglow of a pulsed discharge. Measured Penning and charge exchange constants are in order of 10^10‐9^ cm^3^ sec^−1^. Partial Penning constants in the HeCs system exhibit a small dependence of the energy defect of reaction, whereby an important part of collisions results in excited Cs^+^‐states. On the contrary, energy transfer by charge exchange in HeRb, Cs systems distinguishes by a significant energy defect dependence. Charge exchange from He^+^ to Rb~0~ leads above all to He(2^3^S~1~)‐atoms and normal Rb^+^‐ions. It follows from the metal ion spectrums, that Penning ionization and charge exchange of the investigated systems under utilized conditions represent as processes of selective excitation of alkali metal ions in afterglow and stationary discharge.