Light scattering. XXII. Use of the forward angle dissymmetry method for the determination of the particle size in systems of unknown concentration

1971 ◽  
Vol 36 (7) ◽  
pp. 2625-2639
Author(s):  
B. Sedláček
Keyword(s):  
Particle Size ◽  
Light Scattering ◽  
Forward Angle

Determination of the wavelength dependence of refractive indices of flame soot

1990 ◽  
Vol 430 (1880) ◽  
pp. 577-591 ◽  
Keyword(s):  
Particle Size ◽  
Optical Properties ◽  
Light Scattering ◽  
Equivalence Ratio ◽  
Wavelength Dependence ◽  
Refractive Indices ◽  
Spectral Variation ◽  
Scattering Measurements ◽  
Oxygen Flame

The spectral variation of the optical properties of soot particles is determined by combining classical and dynamic light scattering measurements with the Kramers-Krönig relations. Particle size and number densities are determined from scattering/extinction and autocorrelation measurements at the wavelength of 0.488 μm. This information is then combined with the spectral extinction measurements in the wavelength range 0.2 to 6.4 μm to determine the spectral variation of the refractive indices of flame soot. Results are presented for a premixed propane-oxygen flame with a fuel equivalence ratio ϕ = 1.8. The sensitivity of the technique and its advantage over the previous methods are discussed.

Real-Time Particle Size Measurements in Laser-Generated Plumes by Mie Scattering

1989 ◽  
Vol 43 (7) ◽  
pp. 1248-1251 ◽  
Author(s):  
Sandra M. Kimbrell ◽  
Edward S. Yeung
Keyword(s):  
Particle Size ◽  
Light Scattering ◽  
Pyrolytic Carbon ◽  
Mie Scattering ◽  
Particle Sizes ◽  
Carbon Particles ◽  
Scattering Technique ◽  
Light Scattering Technique ◽  
Dissymmetry Ratio

We report the application of a light scattering technique for the determination of particle sizes in a laser-generated plume. This procedure is based on the dissymmetry ratio obtained for observation at different angles relative to the excitation source. Good spatial and temporal resolution is achieved. The plume can be probed repeatedly during its lifetime. Large carbon particles, on the order of 85 nm and larger, are observed in a plume generated from pyrolytic carbon.

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