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A PET scan detects the product of positron electron annihilation. A positron and an
electron annihilate and create 2 photons.
(a) The wavelength of the photons will not be the same as the deBroglie wavelength of
the positron and electron. Explain why.
(b) The positron and electron each have a kinetic energy of 60 keV. What is the
wavelength of each photon?

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