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Radiation

Radiation. Electron Interactions. Electrons interact with charges in atoms. Electrons decelerate This radiation is called bremsstrahlung “braking radiation”. g. e. e. Z. The range of an electron in matter varies. Energy dependent Material dependent

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Radiation

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  1. Radiation

  2. Electron Interactions • Electrons interact with charges in atoms. • Electrons decelerate • This radiation is called bremsstrahlung • “braking radiation” g e e Z

  3. The range of an electron in matter varies. Energy dependent Material dependent The measure is often scaled to the density. Beta Range

  4. Electron can be accelerated toward a metal target. Heated cathode to create electrons High voltage to get high energy electrons Ejected Photons I V e

  5. The photons come of with a spectrum of energy. Called x-rays Maximum corresponds to potential Peaks correspond to specific quantized energies in an atom. X-Rays

  6. Photons scattering from atomic electrons are described by the Compton effect. Conservation of energy and momentum Special relativity Compton Scattering g’ g q f e

  7. The energy and momentum equations can be combined into one relationship. Compton equation Frequency or wavelength Compton Effect g’ g q f e

  8. The wavelength shift is independent of energy. Only angle The energy of the photon depends on the angle. Max at 180° Recoil angle for electron related to photon energy transfer Small q cot large Recoil near 90° Compton Energy next

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