Vibrational Quenching of NO+(V) Ions in Collision with H2, D2 and O2
Abstract
The vibrational quenching rate constants for NO+ (nu), predominantly in the (nu) = 1 state. have been measured at 200 and 293 K in collisions with H2 and D2 and at 200,293, and 458 K with O2. The rate constants are all very low, corresponding to quenching probabilities about .0001. The low rate constants reflect very shallow attractive potential wells. In the case of H2 and D2 this is a consequence of their low polarizabilities. In the case of O2, repulsive chemical interactions offset the electrostatic attraction to yield a shallow attractive well. This is a consequence of the singlet NO+ and triplet ground state O2 not approaching on the attractive NO3(+) ground state potential surface, which is a singlet. The temperature dependences of the quenching rate constants are generally slight, indicating that the collision energies are in a range comparable to the attractive well depth and that the quenching is not strongly dominated by either the attractive forces, which would give a negative energy dependence, or by the repulsive forces which would give a positive energy dependence. Keywords: Polarizability effects; Temperature effects; Anisotropic interaction potentials; Reprints.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1989
- Accession Number
- ADA220781
Entities
People
- A. A. Viggiano
- E. E. Ferguson
- F. Dale
- J. F. Paulson
- R. A. Morris
Organizations
- Air Force Systems Command