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Extended measurement and assignment of isotropic Raman transitions in the ν 1 region of 12 CD 4
Author(s) -
Lolck JensErik,
Owyoung Adelbert,
Esherick Peter
Publication year - 1985
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.1250160306
Subject(s) - raman spectroscopy , isotropy , hamiltonian (control theory) , spectral line , raman scattering , coherent anti stokes raman spectroscopy , atomic physics , spectroscopy , chemistry , nuclear magnetic resonance , molecular physics , analytical chemistry (journal) , physics , optics , mathematics , quantum mechanics , mathematical optimization , chromatography
The isotropic Raman spectrum of 12 CD 4 is presented in the range from 2101 to 2113 cm −1 , thus covering the ν 1 ( A 1 ) Q ‐branch and part of the ν 2 + ν 4 ( F 1 + F 2 ) Q ‐branch. Experimental results for the 2101‐2108 cm −1 range were obtained using the ‘inverse Raman spectroscopy’ technique and have been published previously. New measurements in the 2108 cm −1 ‐2113 cm −1 range were obtained using the very similar ‘stimulated Raman gain spectroscopy’ technique. In both spectra the resolution is limited by the Doppler width of the lines. Formally, only transitions to the upper state of the ν 1 band are allowed in isotropic Raman scattering, but strong resonances enhance transitions to the upper state of ν 2 + ν 4 . An effective Hamiltonian which takes these resonances into account was used to interpret the spectra and led to the assignment of all significant lines. In all, 165 Raman transitions were assigned, and these transitions are fitted by the model Hamiltonian with a standard deviation of 0.008 cm −1 .