Three-Body Collision Contributions to Recombination and Collision-Induced Dissociation. II. Kinetics

Conference · Fri Apr 10 04:00:00 EDT 1998

OSTI ID:1311

Kendrick, Brian ^[1]; Pack, Russell T; Walker, Robert B

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1. Los Alamos National Laboratory

Detailed rate constants for the reaction Ne + Ne + H {r_equilibrium} Ne{sub 2} + H are generated, and the master equations governing collision-induced dissociation (CID) and recombination are accurately solved numerically. The temperature and pressure dependence are explored. At all pressures, three-body (3B) collisions dominate. The sequential two-body energy-transfer (ET) mechanism gives a rate that is more than a factor of two too small at low pressures and orders of magnitude too small at high pressures. Simpler models are explored; to describe the kinetics they must include direct 3B rates connecting the continuum to the bound states and to the quasibound states. The relevance of the present reaction to more general CID/recombination reactions is discussed. For atomic fragments, the 3B mechanism usually dominates. For diatomic fragments,the 3B and ET mechanism are competitive, and for polyatomic fragments the ET mechanism usually dominates.

• Research Organization: Los Alamos National Lab., NM (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 1311
• Report Number(s): LA-UR--98-1677
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOM-MOLECULE COLLISIONS
BOUND STATE
DISSOCIATION
ENERGY TRANSFER
HYDROGEN
KINETICS
NEON
PRESSURE DEPENDENCE
QUASIBOUND STATE
RECOMBINATION
TEMPERATURE DEPENDENCE
THREE-BODY PROBLEM