MEASUREMENTS OF VARIOUS ISOTOPIC RATIOS AT THE 0.1 PERCENT PERCISION LEVEL WITH A COMPUTER CONTROLLED DIODE LASER SPECTROMETER SYSTEM

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1983

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Ohio State University

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A computer controlled diode laser system has been designed and built which is capable of measuring relative intensities of absorption lines to a high degree of precision in a number of light atmospheric trace gases. Measurements of the relative $^{13}C/^{

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12}C$ ratios in a series of CO2 sample will be presented. It will be shown that a relative accuracy of 0.1 percent can be obtained with a sample size of about 500 picograms of 13CO2. The ratio of 18O/16O was measured at the same time with comparable accuracy. A discussion of the experimental design and measurement capabilities will be given.


Author Institution: Center for Analytical Chemistry, Laser Analytical Chemistry Group National Bureau of Standards

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http://hdl.handle.net/1811/11811

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Abstracts of OSU International Symposium on Molecular Spectroscopy 1980-1989