Bremsstrahlung

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Electromagnetic radiation generated when electrically charged particles are accelerated or decelerated. The spectrum of emitted radiation reaches from a maximum energy given by the kinetic energy of the generating particle down to zero energy. Bremsstrahlung only becomes easily noticeable when the energy of the particle is very high compared to its self-energy. This is mostly only valid for electrons (self-energy of the electron: 511 keV).

Diagram Bremsstrahlung

Generation of bremsstahlung when decelerating an electron which interacts with an atom

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