Title
New line narrowing effects in the infrared collision-induced spectra of molecular hydrogens in liquid neon New line narrowing effects in the infrared collision-induced spectra of molecular hydrogens in liquid neon
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
101(2008) :9 , p. 093001,1-4-
ISSN
0031-9007
ISI
000259195800020
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The first spectroscopic observation of the relative (solute-solute) diffusion in a fluid environment is reported. New, unusually sharp Q(J) lines developing against the diffuse background in the collision-induced fundamental IR bands of hydrogen isotopomers (H2, D2, and HD) dissolved in liquid Ne (T25 K) are studied as functions of the solute concentration x. In all cases, the Q intensity parabolically scales with x, accompanied by a striking narrowing of the line shapes. The narrowing, as revealed by the p-H2 solution studies, is due to a faster growth with x of the sharper solute-solute induced component of the single Q(0) line. The latter as well as other observed solute-solute lines are strongly narrowed by fast velocity decorrelations and are signatures of microscopic-scale diffusion. Also, a first observation of the solute-solvent induced JJ+4 transitions is reported.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/f1840f/phpcraycc.pdf
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