elastic scattering

in spectrochemistry
@[email protected] may be scattered by its @[email protected] through a medium containing particles. If the scatter results in no significant change in the @[email protected] relative to the primary radiation it is called elastic @[email protected] In cases where the @[email protected] centres are small compared to the @[email protected] of the radiation the elastic @[email protected] is called @[email protected] and @[email protected] if this condition is not fulfilled.
PAC, 1985, 57, 1453. (Nomenclature, symbols, units and their usage in spectrochemical analysis - V: Radiation sources (Recommendations 1985)) on page 1464 [Terms] [Paper]