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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 49, Iss. 4 — Apr. 1, 1995
  • pp: 413–424

Spatial Distribution of Radiant Intensity from Primary Sources for Atomic Absorption Spectrometry. Part I: Hollow Cathode Lamps

Albert Kh. Gilmutdinov, Bernard Radziuk, Michael Sperling, Bernhard Welz, and Konstantin Yu. Nagulin

Applied Spectroscopy, Vol. 49, Issue 4, pp. 413-424 (1995)


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Abstract

The spatial distribution of radiant intensity from hollow cathode lamps used as radiation sources in atomic absorption spectrometry is investigated with a digital photodiode array imaging system. Intensity distribution over the cross section of each lamp is measured for both atomic and ionic lines of the analyte and the filler gas. The shape of the distribution is strongly dependent on the hollow cathode diameter. In small cathodes the distribution has the shape of a paraboloid with maximum intensity at the hollow cathode axis for all of the recorded lines. The intensity distributions of lines emitted from large cathodes are nonparaboloid and in some cases have a minimum at the cathode axis and a maximum concentric to the cathode walls. It is shown that the intensity distribution for a given lamp has practically the same shape for all currents applied. Data on the evolution of the intensity distribution during warm-up of the lamps and under various operating conditions are presented.

Citation
Albert Kh. Gilmutdinov, Bernard Radziuk, Michael Sperling, Bernhard Welz, and Konstantin Yu. Nagulin, "Spatial Distribution of Radiant Intensity from Primary Sources for Atomic Absorption Spectrometry. Part I: Hollow Cathode Lamps," Appl. Spectrosc. 49, 413-424 (1995)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-49-4-413

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