Journal
JOURNAL OF RAMAN SPECTROSCOPY
Volume 39, Issue 6, Pages 730-738Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/jrs.1928
Keywords
laser-induced gratings; collisional deactivation processes; methane; vibrational polyads; overtone spectroscopy; four-wave mixing
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Laser-induced grating spectroscopy is applied to measure weak overtone and combination bands of methane between 11170 and 11980 cm(-1) at pressures ranging from 0.2 to 4 bar and ambient temperature. The background-free method yields rotationally resolved spectra of transitions exhibiting cross-sections as low as approximate to 10(-26) cm(2)/molecule. The technique is suitable for clarifying the near-infrared spectra of planetary objects and to provide data for the development and verification of new models describing the complex energy structure of highly vibrationally excited molecules. Copyright (c) 2008 John Wiley & Sons, Ltd.
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