Time-resolved spectrum of copper emitted from reduced-pressure argon spark discharge plasma and the excitation mechanism

Syuya Nakamura, Kazuaki Wagatsuma

Research output: Contribution to journalArticlepeer-review

Abstract

Variations in the emission intensity of several atomic and ionic copper lines were measured during each shot of the argon spark discharges when the pressure of argon was varied at evacuated atmospheres. The time profiles were quite different between the atomic and the ionic lines, and also depended on the pressure of argon. The profile width of the atomic resonance line, Cu I 324.75 nm, was broader than that of an ionic line, Cu II 213.60 nm. In the case of Cu I 324.75 nm, the overall lifetime of the signal was almost constant independent of the argon pressures, and the profile comprised an initial peak and a subsequent large tail which was more predominant at larger pressures of argon. In the case of Cu II 213.60 nm, the overall lifetime of the signal was a little varied at different argon pressures, and the profile comprised an initial peak and a subsequent small tail. These effects could be explained from the difference in their excitation mechanisms, which was changed temporally within a single spark shot.

Original languageEnglish
Pages (from-to)24-28
Number of pages5
JournalYejin Fenxi/Metallurgical Analysis
Volume27
Issue number1
Publication statusPublished - 2007 Jan 1

Keywords

  • Atomic emission spectrometry
  • Copper
  • Excitation mechanism
  • Reduced-pressure argon spark discharge plasma
  • Time-resolved

ASJC Scopus subject areas

  • Metals and Alloys
  • Materials Chemistry

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