One and two-photon excited optogalvanic spectra of argon in the wavelength region of 735 - 850 nm

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Abstract

Optogalvanic (OG) spectra of argon in the visible to near-infrared spectral region between 735 and 850 nm were investigated using a Grimm-style glow-discharge tube, which has been widely used to obtain depth profiles of the elemental composition on various film-like samples. About 49 lines of one-photon and two-photon OG peaks were observed with a pulsed Ti:sapphire laser; these peaks were precisely assigned. Two-photon OG spectra of argon were easily observed without focusing the pulsed laser irradiation to more than 1 mJ. The excitation mechanisms of the observed argon OG spectra could be classified into 3 types: single-photon transition, two-photon transition, and two-photon stepwise transition. In addition, a pseudo-resonant effect was also found to be effective. The argon lines observed in this experiment are suitable as convenient calibration wavelength markers of pulsed tunable laser radiation. 2010

Original languageEnglish
Pages (from-to)25-31
Number of pages7
Journalanalytical sciences
Volume26
Issue number1
DOIs
Publication statusPublished - 2010

ASJC Scopus subject areas

  • Analytical Chemistry

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