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Absolute Raman pair cross‐section for the π u mode in supercritical carbon dioxide
Author(s) -
Baglin F. G.,
Hacura A.,
Yoon J. H.
Publication year - 1991
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250221119
Subject(s) - raman spectroscopy , supercritical carbon dioxide , carbon dioxide , supercritical fluid , quadrupole , chemistry , cross section (physics) , analytical chemistry (journal) , atomic physics , physics , optics , organic chemistry , quantum mechanics
The absolute Raman cross‐section was measured for the π u mode of supercritical carbon dioxide at 50 and 75°C over five densities. These measurements clearly show that a dimeric species is responsible for the quadrupole induced dipole (QPID) Raman spectral activity of the π u (ν 2 ) transition in carbon dioxide. This result is in accord with earlier predictions by Amos et al .