Narrowing, collisional

Bouche Th., Drier Th., Lange B., Wolfrum J., Franck E. U., Schilling W. Collisional narrowing and spectral shift in coherent anti-Stokes Raman spectra of molecular nitrogen up to 2500 bar and 700 K, Appl. Phys. B50, 527-33 (1990). 

May A. D., Stryland J. C., Varghese G. Collisional narrowing of the vibrational Raman band of nitrogen and carbon monoxide, Can. J. Phys. 

Koszykowski M. L., Farrow R. L., Palmer R. E. Calculation of collisionally narrowed coherent anti-Stokes Raman spectroscopy spectra, Opt. Lett. 10, 478-80 (1985). 

Sala J. P., Bonamy J., Robert D., Lavorel B., Millot G., Berger H. A rotational thermalization model for the calculation of collisionally narrowed isotropic Raman scattering spectra - application to the SRS N2 Q-branch, Chem. Phys. 106, 427-39 (1986). 

Bonamy L., Bonamy J., Robert D., Temkin S. I. Consequences of angular momenta coupling on generalized spectroscopic relaxation cross-sections collisional narrowing in isotropic and anisotropic Raman CO2 branches, Proc. 13th ICORS. (Wiley Sons, New York) (1992). 

CC is the other dominant product of hydrocarbon-fueled combustion and its CARS flame spectrum (23)is displayed in Figure 1A. The spectrum is complicated by Fermi resonance and the fact that the rotational transitions are closely overlapped. This precludes treating them as independently broadened and so-called collisional narrowing may need to be taken into account. Computer modelling is currently in progress. Since all hydrocarbon fuels are Raman-active,CARS should ultimately be capable of monitoring total hydrocarbon concentrations during combustion as well. 

Th. Dreier, M. Ridder, G. Schiff, "Collisional Narrowing and Spectral Shift in CARS Spectra of Molecular Nitrogen and Oxygen at Pressures up to 2500 bar and Temperatures of 850 K", Ber. Bunsenges. Phys. Chem. 97,1726-1728 (1993) No. 12... 

Koszykowski, M. L., Farrow, R. L., and Palmer, R. E. "Calculation of Collisionally Narrowed Coherent Anti-Stokes Raman Spectroscopy Spectra." Optics Letters 10 (1985) 478. 

There is a second effect that causes a collisional narrowing of spectral lines. In the case of very long lifetimes of levels connected by an EM transition, the linewidth is determined by the diffusion time of the atoms out of the laser beam (Sect. 3.4). Inserting a noble gas into the sample cell decreases the diffusion rate and therefore increases the interaction time of the sample atoms with the laser field, which results in a decrease of the linewidth with pressure [3.36] until the pressure broadening overcompensates the narrowing effect. 

R.S. Eng, A.R. Calawa, T.C. Harman, P.L. Kelley Collisional narrowing of infrared water vapor transitions. Appl. Phys. Lett. 21, 303 (1972)... 

There is a second effect which causes a collisional narrowing of spectral lines. In case of very long lifetimes of levels connected by an EM tran-... 

COLLISIONAL NARROWING IN FOUR-WAVE LIGHT MIXING... 

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