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Measurement of number density of lead and thallium see-through hollow cathode discharges with a high resolution Fabry–Pérot spectrometer and by conventional atomic absorption

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Abstract

A see-through hollow cathode lamp, or galvatron, is investigated. A novel method is presented for the measurement of an atomic absorption profile using a quasi-continuum source created by the combination of two line sources and a high-resolution Fabry–Pérot interferometer coupled to a spectrometer. Number densities are calculated from the resulting absorption profiles by the peak absorption coefficient relationship and compare well with results obtained from high-resolution emission measurements. Number densities are also determined for the lead 3 P 1 metastable state and thallium 2 P 1/2 o ground state by conventional atomic absorption. A hollow cathode lamp is used as an emission source and is set at a relatively low current to approximate as a line source relative to the galvatron. Due to the relative line widths of the source and absorber, only the lead metastable state results compare to results obtained by saturated fluorescence.

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Authors and Affiliations

  1. Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611, USA

    N. Taylor, N. Omenetto, B.W. Smith & J.D. Winefordner

Authors
  1. N. Taylor
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  2. N. Omenetto
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  3. B.W. Smith
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  4. J.D. Winefordner
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Correspondence to J.D. Winefordner.

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PACS

52.25.Tx; 32.70.Jz; 07.60.Ly

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Taylor, N., Omenetto, N., Smith, B. et al. Measurement of number density of lead and thallium see-through hollow cathode discharges with a high resolution Fabry–Pérot spectrometer and by conventional atomic absorption. Appl. Phys. B 89, 99–106 (2007). https://doi.org/10.1007/s00340-007-2751-2

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  • DOI: https://doi.org/10.1007/s00340-007-2751-2

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