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Title
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New line narrowing effects in the infrared collision-induced spectra of molecular hydrogens in liquid neon
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Author
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Abstract
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| 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. |
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Language
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English
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Source (journal)
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Physical review letters. - New York, N.Y., 1958, currens
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Publication
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New York, N.Y.
:
American Physical Society
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2008
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ISSN
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0031-9007
[print]
1079-7114
[online]
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DOI
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10.1103/PHYSREVLETT.101.093001
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Volume/pages
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101
:9
(2008)
, p. 093001,1-4
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ISI
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000259195800020
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Full text (Publisher's DOI)
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Full text (open access)
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