Abstract

We consider a photon emission in collisions of electrons with atoms and clusters under the conditions when the radiation of atomic electrons gives significant or even dominating contribution to the total spectrum. This occurs, for example, when the frequency of the emitted photon is comparable with the energy of giant collective or plasmon resonance in an atom or cluster. We consider the manifestation of the effect for atomic and solid targets demonstrating the significant role of the photon self-absorption and electron energy loss in a solid target. We present results of recent calculations of the cross sections of the process for a number of targets. Theoretical results are compared with the available experimental data.

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