Raman-scattered light if a Rayleigh line is present, as the contribution
be collected to within a few wavenumbers of the Rayleigh line.
The PeakFinder fiber-optic probe features optical filtering of 106 for efficient attenuation of the Rayleigh line
for background-free Raman spectra.
This high-transmission coupler system includes a specialized narrow-band filter set that is optimally aligned to detect Raman lines extremely close to the Rayleigh line
, while maintaining ideal Rayleigh shielding.
Nevertheless, the resulting underestimation of the void volume in a homogenized particle is only [approximately]30%, while careful examination of the log-log plots of scattering cross section versus particle radius shows the scatterers to be located just at the upper limit where the Mie model line deviates from the straight Rayleigh line
With a fiber optic interface, it collects data within 175 [cm.sup.-1] of the Rayleigh Line
. When using the system, there is no sample preparation required.
All probes provide optimum collection of Raman signal, complete filtering of the Rayleigh line
and silica background, and robust construction.