Comparison of coherent forward scattering and atomic absorption profiles of O I 844.6-nm and Ar I 842.5-nm lines in the pulsed and continuous radio-frequency glow-discharge plasmas

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Abstract

Comparison of the coherent forward scattering (CFS) and atomic absorption (AA) of the O I 844.6- nm and Ar I 842.5 -nm lines was performed in pulsed and continuous radio-frequency glow discharge (GD) plasma. Zeeman splitting of the conventional AA spectra and the self-absorption profile of CFS radiation could be observed for different magnetic fields, above ~50 and ~10 mT, respectively. The calculation of the axial variation of the magnetic field of the GD tube and the magnetic field determined by the measured Zeeman splitting allowed us to determine the locations of the highest and the second highest relative maximum of the number density of excited argon atoms in the lower state of the Ar I 842.5-nm transition.

Original languageEnglish
Pages (from-to)150-155
Number of pages6
JournalSpectrochimica Acta - Part B Atomic Spectroscopy
Volume149
DOIs
Publication statusPublished - 2018 Nov

Keywords

  • Atomic absorption
  • Coherent forward scattering
  • Continuous discharge
  • Pulsed discharge
  • Radio frequency glow discharge

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

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