Rotational Temperature Dependences of Gas Phase Ion-Molecule Reactions
Abstract
A technique for measuring the rotational temperature dependences of the rate constants at several temperatures in a variable temperature selected ion flow drift tube. For a monatomic ion, comparing the rate constants at the same center of mass kinetic energy at different temperatures yields the dependence of the rate constant on the internal temperature of the reactant neutral. For neutrals in which the vibrational modes are inactive at the temperatures of the experiment, the internal energy dependence is the rotational temperature dependence. Two examples are presented here, one in which rotational energy significantly influences the rate constants, approximately T-05, and one in which it does not. Implications for past drift tube experiments are discussed. Keywords: Methane ion chemistry, Hydrogen atom transfer, Oxygen reactions, Reprints.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 23, 1988
- Accession Number
- ADA202024
Entities
People
- Albert A Viggiano
- John F. Paulson
- Robert A. Morris
Organizations
- Air Force Research Laboratory