Quantitative Infrared Spectroscopic Measurements of Boron Fluorides.
Final rept. 1 Apr 77-30 Mar 80,
AERODYNE RESEARCH INC BEDFORD MA CENTER FOR CHEMICAL AND ENVIRONMENTAL PHYSICS
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The objective of this research is the performance of quantitative infrared spectroscopic measurements of boron fluorides and oxides in the gas phase. The measurement program is designed to determine infrared absorption coefficients and absorption line spacings in order to facilitate the construction of infrared radiation band models. In order to carry out these measurements an apparatus which permits the performance of quantitative spectroscopic measurements of transient species over the temperature range of 300 to 1500 K was constructed. The capability of this apparatus to perform these measurements over its designed range of operating parameters was demonstrated. The infrared absorption coefficients of the nu-3 band of BF3 were measured over the range of 300 to 1500 K. These measurements were combined with flame measurements at 2400 K to develop and verify a radiation band model for BF3. The formalism developed for this band model is more comprehensive than previous treatments and is generally applicable to perpendicular bands of symmetric top molecules. The infrared band strength of BF was measured. The band strength was determined by measuring the absorption cross section of a single vibration-rotation line using a tunable diode laser as the light source. The BF number density was measured in-situ using ultraviolet absorption spectroscopy. Author
- Atomic and Molecular Physics and Spectroscopy