Collisional Dynamics of the B3pi(O+) State of Iodine Monofluoride.
Abstract
Electronic quenching and vibrational and rotational energy transfer constants in IF(B) were determined in a chemically reactive flow system using both steady-state and time-resolved laser induced fluorescence. IF(B) deactivation by the noble gases and nitrogen was extremely slow for all the stable B state vibrational levels. The only appreciable quenchers were fluorine, oxygen, water vapor, and iodine. Double exponential IF(B) fluorescence decays were observed with both oxygen, and water vapor indicating two depletion processes occurring over the lifetime of IF(B). Vibrational transfer was 100 to 1000 times more efficient than electronic quenching; and the vibrational transfer process was adequately described as an adiabatic encounter. The relative V-T cross sections for the noble gases showed a smooth dependence on the collision reduced mass. The cross sections for nitrogen, oxygen, and fluorine showed no clear dependence on the collision reduced mass signifying that a V-T process may not be the dominant mechanism. The IF(B) vibrational transfer cross sections for the noble gases, nitrogen, and oxygen scaled linearly with vibrational quantum number, and downward, single quantum jumps dominated the transfer pathway. Rotational energy transfer with the noble gases and nitrogen was the most efficient kinetic process in IF(B). The estimated efficiencies for the total population removal from a single J level were typically 100 times greater than that for vibrational transfer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1985
- Accession Number
- ADA159242
Entities
People
- P. J. Wolf
Organizations
- Air Force Institute of Technology