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Some model calculations of the resonance background in coherent Raman spectra
Author(s) -
Kircheva P. P.,
Simeonov S. D.
Publication year - 1987
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.1250180611
Subject(s) - resonance (particle physics) , coherent anti stokes raman spectroscopy , dephasing , raman spectroscopy , raman scattering , spectral line , chemistry , relaxation (psychology) , x ray raman scattering , molecular physics , nuclear magnetic resonance , atomic physics , physics , optics , condensed matter physics , quantum mechanics , psychology , social psychology
Model calculations of coherent Raman spectra under resonance pumping conditions for polyatomic molecules have been carried out. The influence of the resonance background, which originates from the ‘extra’ resonance term of the resonance vibronic transition S 0 S 1 , is demonstrated. According to the calculations, the coherent anti‐Stokes Raman scattering (CARS) spectra for ω a = 2ω p −ω s are slightly changed when the resonance background is taken into account. The background contribution to the coherent Stokes Raman scattering (CSRS) for ω s = 2ω p −ω a is higher. It is shown that a line reshaping associated with the concentration changes contains information about the relaxation parameters of the molecules, especially about the dephasing Γ ij dep .