The local field approach and kinetic equation method is applied to calculatethe surface plasmon radiative damping in a spheroidal metal nanoparticleembedded in any dielectric media. The radiative damping of the surface plasmonresonance as a function of the particle radius, shape, dielectric constant ofthe surrounding medium and the light frequency is studied in detail. It isfound that the radiative damping grows quadratically with the particle radiusand oscillates with altering both the particle size and the dielectric constantof a surrounding medium. Much attention is paid to the electronsurface-scattering contribution to the plasmon decay. All calculations of theradiative damping are illustrated by examples on the Au and Na nanoparticles.
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