Accession Number:

ADA053639

Title:

An Exact Quantum Study of Vibrational Deactivation by Reactive and Nonreactive Collisions in the Collinear Isotopic H + FH Systems.

Descriptive Note:

Interim rept.,

Corporate Author:

CALIFORNIA INST OF TECH PASADENA ARTHUR AMOS NOYES LAB OF CHEMICAL PHYSICS

Personal Author(s):

Report Date:

1976-08-01

Pagination or Media Count:

12.0

Abstract:

Accurate quantum mechanical transition probabilities and rate constants for vibrational deactivation via reactive and nonreactive collisions in collinear H FHv, D FDv, H FDv, and D FHv are presented. In all cases, the reactive inelastic rate constants are larger than the nonreactive ones for the same initial and final vibrational states, but the ratios of these reactive and nonreactive rate constants depend strongly on the vibrational quantum number v and on isotopic composition of the reagents. Nonreactive and reactive transition probabilities for multiquantum jump transitions are generally comparable to those for single quantum transitions. This vibrationally nonadiabatic behavior is a direct consequence of the severe distortion of the diatomic that occurs in a collision on a reactive potential surface, and makes H or D more efficient deactivators of HF or DF than are nonreactive collision partners. Most conclusions are in qualitative and even quantitative agreement with those of Wilkins three-dimensional quasi-classical trajectory study on the same systems. Author

Subject Categories:

  • Lasers and Masers
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE