Chemical Laser Reactions Cross-Section Measurements
Final rept. 1 Jan 1972-1 Oct 1973
TRW SYSTEMS GROUP REDONDO BEACH CA
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The objective of the program was the measurement of energy-dependent cross sections for each of the final vibrational states of the DF molecule resulting from the reaction F D2 yields DF D. In pursuit of this objective, a powerful new technique for the detailed study of gas-phase chemical reactions was developed. The high-intensity atomic beam is produced by the irradiation of thin films of solid material with a Q-switched ruby laser pulse. For example, the flux of 4 eV fluorine atoms produced by the irradiation of a BiF3 film with a 12 joule laser pulse has been estimated to be 10 to the 17th power atoms sq cm-sec at a point 60 cm from the laser target. The experiment used a crossed beam configuration where the fluorine atom beam interacts with a deuterium gas beam obtained from a nozzle source. The method of detailed energy balance was to be used to determine the internal energy state of the product molecules. Two approaches to achieving the required energy discrimination were evaluated One involving the use of a velocity-dependent product detector and the other using mechanical velocity selection of the incident beam.
- Lasers and Masers