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Radial Profile of the Spectral Width of the Ar 7d[5/2]3-4p[3/2]2 Line Inside the Cathode Fall Region of Ar Hollow Cathode Discharges

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The spatial variation of the spectral width of the Ar 7d[5/2]3-4p[3/2]2 transition inside the cathode fall region of hollow cathode discharges was examined by laser optogalvanic spectroscopy at various discharge currents and gas pressures. A close yet complicated correlation with the spatial distribution of the electric field was found to be present, and attempts were made to acquire and summarize qualitative understanding of the observation. The spectral width at the cathode surface, Δω c (in cm−1), was found to be related to the corresponding Stark shift, Δv c (in cm−1), by Δω c = (0.0021 ± 0.0002)Δv c in cm−1.

Keywords: Atomic absorption spectroscopy; Hollow cathode excitation; Optogalvanic spectroscopy; UV-visible spectroscopy

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702894202076

Affiliations: Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 227, Japan

Publication date: January 1, 1989

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