Stable-isotope ratio analysis based on atomic hyperfine structure and optogalvanic spectroscopy.
Atomic hyperfine structures were measured for the Cu I transition at 5782 A by optogalvanic spectroscopy at high resolution, with a cw dye laser. Samples were electro-deposited on the demountable cathode of a home-made hollow-cathode lamp. By spectral deconvolution, the relative isotopic abundances of (63)Cu and (65)Cu could be determined with good accuracy and precision. The technique is applicable to copper concentrations as low as 1.6 ppm.
Tong
W G
WG
Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50011, U.S.A.
Yeung
E S
ES