Analytical Photon Catalysis: Measurement of Bi Concentrations to 10,000 cu cm.
Abstract
A new analytic technique was developed to determine quantitatively the concentration of gas-phase species at concentrations well below the capabilities of atomic absorption and mass spectroscopy. The method involves injecting an excess of an energetic metastable species, N2 A(superscript 3 Sigma(+) subscript u) in this experiment, into a gas stream containing the species to be measured, Bi in this case. Energy transfer from the metastable to the sample species results in excitation and subsequent rapid emission of light. The intensity of the light emitted at the wavelengths characteristic of the sample species is a function of, and hence a measure of, the concentration. Concentrations as low as 15000/cu. cm. were measured. Greater sensitivity is possible with more efficient optical detection. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 19, 1977
- Accession Number
- ADA040718
Entities
People
- David G. Sutton
- Gene A. Capelle
Organizations
- The Aerospace Corporation