Phase-shifting acceleration of ions in an ion cyclotron resonance spectrometer: Kinetic energy distribution and reaction dynamics
The kinetic energy distribution of trapped ions in an ion cyclotron resonance spectrometer (ICR) under a periodically phase-reversed rf potential is determined. At the operating pressures typical for the ICR (10-7-10-5 Torr), the ions eventually achieve a kinetic energy distribution that varies across short time intervals (0.1 ms) but is constant on the time scale of bimolecular collisions. This provides the opportunity to study quantitatively the translational energy dependence of bimolecular reactions and sequential collisional activation processes. The kinetic energy distribution, although not Maxwell-Boltzmann, is readily calculable. Results obtained for the kinetic energy dependence of the reaction of Cl- + CH3Br are qualitatively and quantitatively consistent with reported nonstatistical behavior in that system. Experimental considerations are discussed.
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Related Subject Headings
- 5102 Atomic, molecular and optical physics
- 3407 Theoretical and computational chemistry
- 3406 Physical chemistry
- 0307 Theoretical and Computational Chemistry
- 0306 Physical Chemistry (incl. Structural)
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
Citation
Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- 5102 Atomic, molecular and optical physics
- 3407 Theoretical and computational chemistry
- 3406 Physical chemistry
- 0307 Theoretical and Computational Chemistry
- 0306 Physical Chemistry (incl. Structural)
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics