Absolute calibration of atomic density measurements by laser-induced fluorescence spectroscopy with two-photon excitation

K Niemi, V Schulz-von der Gathen, H F Dobele

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The two-photon resonances of atomic hydrogen (lambda = 2 X 205.1 nm), atomic nitrogen (lambda = 2 X 206.6 nm) and atomic oxygen (lambda = 2 X 225.6 nm) are investigated together with two selected transitions in krypton (lambda = 2 X 204.2 nm) and xenon (lambda = 2 X 225.5 mn). The natural lifetimes of the excited states, quenching coefficients for the most important collisions partners, and the relevant ratios of the two-photon excitation cross sections are measured. These data can be applied to provide a calibration for two-photon laser-induced fluorescence measurements based on comparisons with spectrally neighbouring noble gas resonances.

Original languageEnglish
Pages (from-to)2330-2335
Number of pages6
JournalJournal of Physics D: Applied Physics
Issue number15
Publication statusPublished - 7 Aug 2001

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