Laser ablation of an indium target: time-resolved Fourier-transform infrared spectra of In I in the 700-7700 cm super(-1) range

Laser-induced breakdown spectroscopy (LIBS) in combination with a time-resolved Fourier-transform technique was applied to obtain spectra of In I in the infrared spectral region. This method was proven to be suitable for measuring the weak energy transitions between highly excited Rydberg atomic lev...

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Bibliographic Details
Published in:Journal of analytical atomic spectrometry 2014-11, Vol.29 (12), p.2275-2283
Main Authors: Civis, S, Kubelik, P, Ferus, M, Chernov, V E, Zanozina, E M, Juha, L
Format: Article
Language:English
Subjects:
Indium
Infrared
Lasers
Mathematical analysis
Similarity
Spectra
Spectrometry
Spectroscopy
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Summary:Laser-induced breakdown spectroscopy (LIBS) in combination with a time-resolved Fourier-transform technique was applied to obtain spectra of In I in the infrared spectral region. This method was proven to be suitable for measuring the weak energy transitions between highly excited Rydberg atomic levels. The advantage comes from the possibility of selecting an optimal time-delay after the laser pulse, when the low intensity spectral lines are near their maximum intensity and can filter out the disturbing high intensity lines with different emission time profiles. The time-resolved spectra were recorded in the 700-1000, 900-1300, 1200-1680, 1800-4000, 4100-5000 and 5000-7700 cm super(-1) ranges with a resolution of 0.017 cm super(-1). Using this technique, we obtained five g- and h-levels of In I that have never been measured previously. We demonstrate a close similarity of wavenumbers for the 7s sub(1/2)-7p sub(1/2) and 4f-5g transitions of the In atom.
ISSN:0267-9477
1364-5544
DOI:10.1039/c4ja00123k