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Temperature dependence of the absorption spectrum of CH4 by high resolution spectroscopy at 81 K: (II) The icosad region (1.49-1.30 mu m)

SYSNO ASEP	0346595
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Temperature dependence of the absorption spectrum of CH4 by high resolution spectroscopy at 81 K: (II) The icosad region (1.49-1.30 mu m)
Author(s)	Campargue, A. (FR) Wang, L. (FR) Kassi, S. (FR) Mašát, Milan (UFCH-W) Votava, Ondřej (UFCH-W)_{RID, ORCID}
Source Title	Journal of Quantitative Spectroscopy and Radiative Transfer. - : Elsevier - ISSN 0022-4073 Roč. 111, č. 9 (2010), s. 1141-1151
Number of pages	11 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	methane ; CH4 ; absorption spectroscopy
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	GA202/09/0800 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000277469800009
DOI	10.1016/j.jqsrt.2009.11.025
Annotation	The high resolution absorption spectrum of methane has been recorded at liquid nitrogen temperature by differential absorption spectroscopy between 6717 and 7351 cm(-1) (1.49-1.36 mu m) using a cryogenic cell and a series of distributed feed back (DFB) diode lasers. The investigated spectral region corresponds to the very congested low energy part of the icosad for which the HITRAN database provides neither rovibrational assignments nor the lower state energies. The positions and strengths at 81 K of 9389 transitions were obtained from the spectrum analysis. The minimum value of the measured line intensities (at 81 K) is on the order of 10(-26) cm/molecule. From the variation of the line strength between 81 K and 296 K, the low energy values of a total of 4646 transitions were determined. They represent 79.4% and 68.4% of the total absorbance in the region at 81 and 296 K. respectively, and include 28 transitions assigned to the nu(2)+4 nu(4) band near 6765 cm(-1).
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2011

Number of the records: 1