The Raman effect, in spectroscopy, is the
change in the wavelength of light that occurs when light scatters inelastically (see scattering)
from atoms or molecules. It arises from radiation exciting (or de-exciting)
atoms or molecules from their initial states. The Raman effect is named
after the Indian physicist Chandrasekhar Raman,
who won a Nobel Prize in 1930 for his discovery.
|In the Raman effect, part of the original photon
energy is used to excite a resonant vibration – usually described
as a three-level event via a virtual excited state.
AND NUCLEAR PHYSICS