Comparative investigation on the excitation of copper emission lines between argon and helium spark discharge plasmas

Syuya Nakamura, Kazuaki Wagatsuma

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The emission intensities and the signal-to-background ratios (SBRs) of copper emission lines in the wavelength range 200-360 nm were observed from a medium-voltage spark discharge plasma when argon or helium was employed as the surrounding gas. The observed copper spectra comprised Cu(I) lines having excitation energy of 3.8-9.3 eV, and Cu(II) lines assigned to three different transitions: 3d84p-3d84s transition (excitation energy of 8.2-9.2 eV), 3d85s-3d84p transition (13.4-13.6 eV), and the 3d84d-3d84p transition (14.2-14.8 eV). The Cu(I) lines have much smaller intensities in the helium plasma compared with the argon plasma, whereas the Cu(II) lines have similar intensities between both plasmas. The SBRs of some ionic copper lines are larger in the helium plasma compared with the argon plasma. Therefore, when an ionic line has to be measured in the analytical applications, the helium plasma should be recommended.

Original languageEnglish
Pages (from-to)497-509
Number of pages13
JournalSpectroscopy Letters
Volume39
Issue number5
DOIs
Publication statusPublished - 2006 Oct 1

Keywords

  • Argon plasma
  • Copper emission lines
  • Helium plasma
  • Signal-to-background ratio
  • Spark discharge optical emission spectrometry

ASJC Scopus subject areas

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

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