|When high energy electrons are incident on a tungsten target, a broad spectrum of x-rays are given off. Most of the x-ray photons are spread over a range of energies, but there are a large number of x-rays with a specific energy -about 60 keV. This sharp x-ray line arises because:
- An electron bounces off a tungsten atom and since accelerating a charge leads to radiation, it gives off an x-ray when it does so.
- An electron excites a tungsten atom into a particular excited state and it gives off a particular x-ray when it returns to its original state.
- An electron slows via many collisions with electrons in many tungsten atoms. The combined effect of these collisions leads to the sharp x-ray line.
- An electron is absorbed by a nucleus of tungsten and converted into energy.
- None of the above.
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Page last modified
October 31, 2002: MP08