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The phenomenon is described that is an analogue of the Vavilov-Cherenkovphenomenon and that could be observable in a space with the boundary separateda well reflecting light metal and a dielectric. An electron that is moving at aconstant velocity in proximity to the such boundary creates surfaceplasmon-polaritons with a phase velocity that is below the electron velocity.The linear momentum of a photon in the created plasmon-polariton is calculated.This momentum could be as high as a doubled initial electron momentum. In theother case the electron that has created the photon in the plasmon-polaritoncould totally lost its velocity. It is shown that at the non-zero temperaturethis process has a non-zero probability.

On the properties of the phenomenon like Vavilov-Cherenkov one with emission of surface plasmons