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

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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 ... continued below

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42 p.

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Kendrick, Brian; Pack, Russell T. & Walker, Robert B. April 10, 1998.

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Description

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.

Physical Description

42 p.

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INIS; OSTI as DE00001311

Medium: P; Size: 42 pages

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  • Gordan Conference, Plymouth, MA (US), 06/1998

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  • Report No.: LA-UR--98-1677
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 1311
  • Archival Resource Key: ark:/67531/metadc625203

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • April 10, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 12, 2017, 3:35 p.m.

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Kendrick, Brian; Pack, Russell T. & Walker, Robert B. Three-Body Collision Contributions to Recombination and Collision-Induced Dissociation. II. Kinetics, article, April 10, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc625203/: accessed January 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.