Three-body collision contributions to recombination and collision-induced dissociation. 1: Cross sections
Atomic and molecular recombination and collision-induced dissociation (CID) reactions comprise two of the most fundamental types of chemical reactions. They are important in all gas phase chemistry; for example, about half of the 196 reactions identified as important in combustion chemistry are recombination or CID reactions. Many of the current chemical kinetics textbooks and kinetics papers treat atomic and molecular recombination and CID as occurring only via sequences of two-body collisions. Actually, there is considerable evidence from experiment and classical trajectory calculations for contributions by true three-body collisions to the recombination of atomic and diatomic radicals, and that evidence is reviewed. Then, an approximate quantum method treating both two-body and three-body collisions simultaneously and on equal footing is used to calculate cross sections for the reaction Ne{sub 2} + H {rightleftharpoons} Ne + Ne + H. The results provide clear quantum evidence that direct three-body collisions do contribute significantly to recombination and CID.
- Research Organization:
- Los Alamos National Lab., Theoretical Div., NM (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Management and Administration, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 677022
- Report Number(s):
- LA-UR-98-1676; CONF-9806139-; ON: DE99000689; TRN: AHC29821%%155
- Resource Relation:
- Conference: Gordon conference, Plymouth, NH (United States), Jun 1998; Other Information: PBD: 10 Apr 1998
- Country of Publication:
- United States
- Language:
- English
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Three-Body Collision Contributions to Recombination and Collision-Induced Dissociation. II. Kinetics
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