Discrete resonance CARS emission from NO/sub 2/: Its temporal and spectral properties

Journal Article · Tue Jul 01 00:00:00 EDT 1980 · J. Chem. Phys.; (United States)

OSTI ID:5363346

McIlwain, M E; Hindman, J C

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-31109-ENG-38
• OSTI ID: 5363346
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 73:1; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
CHALCOGENIDES
EMISSION SPECTRA
INELASTIC SCATTERING
NITROGEN COMPOUNDS
NITROGEN OXIDES
OPTICAL PUMPING
OXIDES
OXYGEN COMPOUNDS
RAMAN SPECTRA
RESONANCE SCATTERING
SCATTERING
SPECTRA
TIME DEPENDENCE