Discrete resonance CARS emission from NO/sub 2/: Its temporal and spectral properties
Coherent anti-Stokes emission has been observed for resonance excitation of NO/sub 2/ within an optical pumping geometry similar to that employed for CARS spectroscopy. Spectra have been measured for excitation of NO/sub 2/ in three wavelength regions of its absorption: 585, 564, and 542 nm. These spectra have been used to investigate the four wave process which produces this emission and to determine the ro--vibronic contributions to the absorption of NO/sub 2/ at these wavelengths. Results from pressure quenching and time dependence studies indicate that a coherent level is produced which has a relatively long lifetime. The anti-Stokes emission has the same temporal properties as the Stokes pulse. This indicates that only the first pump photon is in resonance with an electronic transition. A comparison of these results with those expected for resonance Raman and discrete resonance Raman in particular indicates that the resonance CARS process can be interpreted by theoretical and phenomenological considerations developed to describe resonance Raman.
- Research Organization:
- Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 5363346
- Journal Information:
- J. Chem. Phys.; (United States), Vol. 73:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
NITROGEN OXIDES
EMISSION SPECTRA
RAMAN SPECTRA
OPTICAL PUMPING
RESONANCE SCATTERING
TIME DEPENDENCE
CHALCOGENIDES
INELASTIC SCATTERING
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SPECTRA
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory