Doppler-Free Laser Polarization Spectroscopy Using a Demountable DC Cathode Discharge Cell as a Trace Concentration Atomizer

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Abstract:

The use of a demountable hollow cathode discharge atomizer in Doppler-free polarization spectroscopy is described for hyperfine structure analysis at trace analyte concentrations/sizes using a continuous-wave ring dye laser. Using a low-pressure demountable plasma cell in laser polarization spectroscopy yields several advantages. In addition to cancellation of Doppler broadening, Lorentzian-broadening is minimized due to low-pressure atomization in the cathode discharge cell. This in turn increases spectral resolution enough to allow isotope ratio and hyperfine structure analysis. In addition, a demountable hollow cathode cell as atomizer offers convenient and efficient small-sample (10 ng) introduction in both liquid or solid form.

Keywords: Demountable hollow cathode discharge atomizer; Hyperfine structure; Laser polarization spectroscopy; Trace elemental analysis

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702904417643

Affiliations: Department of Chemistry, San Diego State University, San Diego, California 92182

Publication date: December 1, 1990

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