Two-dimensional observation of emission spectra excited from laser induced plasmas and the application to emission spectrometric analysis

Chizuru Kitaoka, Kazuaki Wagatsuma

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The spatial distribution analysis of emission signals from a laser-induced plasma can provide information on the excitation mechanism as well as on the optimization of the analytical conditions when it is employed as a sampling and excitation source in optical emission spectrometry. A two-dimensionally imaging spectrometer system was employed to measure spatial variations in the emission intensities of a copper sample and plasma gases when krypton, argon, or helium was employed under various pressure conditions. The emission image of the Cu I 324.75-nm line consists of a breakdown spot and a plasma plume, where the breakdown zone expands toward the surrounding gas. The shape and the intensities of the plasma plume are strongly dependent on the kind and pressure of the plasma gas, while those of the breakdown zone are less influenced by these experimental parameters. This effect can be explained by the difference in the cross-section of collisions between krypton, argon, and helium. The signal-to-background ratio of the Cu I 324.75-nm line was estimated over two-dimensional images to determine the optimum position for analytical applications. 2007

Original languageEnglish
Pages (from-to)1261-1265
Number of pages5
Journalanalytical sciences
Volume23
Issue number11
DOIs
Publication statusPublished - 2007 Nov

ASJC Scopus subject areas

  • Analytical Chemistry

Fingerprint Dive into the research topics of 'Two-dimensional observation of emission spectra excited from laser induced plasmas and the application to emission spectrometric analysis'. Together they form a unique fingerprint.

  • Cite this