INTERFERENCE EFFECTS IN THE HIGH-RESOLUTION CARS SPECTRA OF GASES Academic Article uri icon

abstract

  • The CARS spectra of gasphase molecules have contributions from both real and imaginary components of the thirdorder nonlinear susceptibility. When the spectral lines are closely spaced as in the highresolution CARS spectra (e.g. 0.03 cm1) of the Qbranches of diatomic molecules, considerable interference between the lines occurs for the contribution of the real part of the susceptibility, which causes asymmetry in the band profiles. The magnitude of the interference is dependent on the bandwidths which are themselves primarily due to pressure broadening at high and medium pressures and due to Doppler broadening at low pressure. In this work the CARS spectra of two individual lines and of the diatomic molecules O2, N2 and NO have been calculated for a number of different linewidths. The effects of interference wereshown to result in substantial spectral differences for the various values of . Copyright 1980 Heyden & Son Ltd

published proceedings

  • JOURNAL OF RAMAN SPECTROSCOPY

author list (cited authors)

  • LAANE, J., & KIEFER, W.

citation count

  • 25

complete list of authors

  • LAANE, J||KIEFER, W

publication date

  • December 1980

publisher