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Mar5-09, 10:55 PM
P: 261
Stationary electrons?

Quote Quote by turin View Post
I don't understand this question.
Well, they are bound, which is sort of like having negative kinetic energy.
Um, no. Bound electrons have negative energy with respect to the vacuum level, but they always have a non-negative kinetic energy.

You need to think about the energy scales involved in Compton scattering. Treating the electron as unbound is equivalent to ignoring the binding energy of the electron. Does it make much difference if we neglect the binding energy of the electron?