About: Accurate determination of low state rotational quantum numbers (J < 4) from planar-jet and liquid nitrogen cell absorption spectra of methane near 1.4 micron

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About: Accurate determination of low state rotational quantum numbers (J < 4) from planar-jet and liquid nitrogen cell absorption spectra of methane near 1.4 micron Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	An improved procedure for accurate determination of empirical lower state rotational quantum numbers from molecular absorption spectra is demonstrated for methane. We combine the high resolution absorption spectra in the 7070-7300 cm(-1) frequency range obtained in liquid nitrogen cooled cryogenic cell (T = 81 K) and in supersonic planar jet expansion (T-R = 25 K). Empirical lower state energies of 59 transitions are determined from the ratio of the absolute absorption line strengths at 25 and 81 K. The procedure relies on the realistic description of rotational state populations in the supersonic jet expansion where non-equilibrium nuclear spin isomer distributions are generated due to the rapid cooling. The accuracy of the experimental determination of the lower state energies with J <= 3 is found to considerably improve the results of the same approach applied to spectra at 296 and 81 K. An improved procedure for accurate determination of empirical lower state rotational quantum numbers from molecular absorption spectra is demonstrated for methane. We combine the high resolution absorption spectra in the 7070-7300 cm(-1) frequency range obtained in liquid nitrogen cooled cryogenic cell (T = 81 K) and in supersonic planar jet expansion (T-R = 25 K). Empirical lower state energies of 59 transitions are determined from the ratio of the absolute absorption line strengths at 25 and 81 K. The procedure relies on the realistic description of rotational state populations in the supersonic jet expansion where non-equilibrium nuclear spin isomer distributions are generated due to the rapid cooling. The accuracy of the experimental determination of the lower state energies with J <= 3 is found to considerably improve the results of the same approach applied to spectra at 296 and 81 K. (en)
Title	Accurate determination of low state rotational quantum numbers (J < 4) from planar-jet and liquid nitrogen cell absorption spectra of methane near 1.4 micron Accurate determination of low state rotational quantum numbers (J < 4) from planar-jet and liquid nitrogen cell absorption spectra of methane near 1.4 micron (en)
skos:prefLabel	Accurate determination of low state rotational quantum numbers (J < 4) from planar-jet and liquid nitrogen cell absorption spectra of methane near 1.4 micron Accurate determination of low state rotational quantum numbers (J < 4) from planar-jet and liquid nitrogen cell absorption spectra of methane near 1.4 micron (en)
skos:notation	RIV/61388955:_____/10:00346348!RIV11-AV0-61388955
http://linked.open...avai/riv/aktivita	P S Z
http://linked.open...avai/riv/aktivity	P(IAA400400706), S, Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika	13
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Pracna, Petr Votava, Ondřej
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	245207
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/10:00346348
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	spectroscopy; absorption spectra; physical chemistry (en)
http://linked.open.../riv/klicoveSlovo	spectroscopy absorption spectra physical chemistry
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[D5893B3BD74D]
http://linked.open...i/riv/nazevZdroje	Physical Chemistry Chemical Physics
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	High-resolution molecular spectroscopy. Investigation of intramolecular energy redistribution in astrophysically important molecules.
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	12
http://linked.open...iv/tvurceVysledku	Votava, Ondřej Pracna, Petr Kassi, S. Mašát, M.
http://linked.open...ain/vavai/riv/wos	000275706100011
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace
issn	1463-9076
number of pages	11 (xsd:int)

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