The scattered radiation can be analyzed by using scanning optical monochromator using a phototube for a detector. A laser beam is used to irradiate a spot on the sample under investigation.
The scattered radiation produced by the Raman Effect comprises information about the energies of molecular vibrations and rotations and these depend on the specific atoms or ions that comprise the molecule, the chemical bonds link them, the symmetry of their molecule structure and the physio-chemical surroundings where they reside.
It is used to ascertain the chemical composition of a sample based on the wavelength and intensity of the light passing through the sample. You can also browse online resources to get more details on raman scattering.
Raman spectroscopy is based on the theory of Raman scattering, which states that light is scattered because of the vibrations of the molecules in the material and changes its energy from that of the incident light. This way, Raman spectrometers utilize the Raman Effects by comparing the various energies of the incident light and the scattered photons.
The observation of the vibrational Raman spectrum of a molecule is dependent upon a change in the molecules polarizability rather than its dipole moment during the vibration of the atoms. Raman spectrometers are similar to Infrared Spectrometers (IR) in a way that both measure the vibrational energies of these molecules in a sample.
Because of this, Infrared and Raman spectra provide complementary information and between the two techniques, all vibrational transitions can be observed. Excepth this , You can click at http:/
This combination of techniques is vital for the measurement of all of the vibrational frequencies of the molecules of high symmetry that do not have permanent dipole moments. Since Raman scattering differs from infrared absorption, the two methods of spectroscopy are often used to provide complementary data.
Most incident photons are scattered by the sample with no change in frequency. To enhance the monitoring of the radiation, the scattered radiation is observed perpendicular to the incident beam.