Which of the following is NOT a product of Compton scatter?

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Multiple Choice

Which of the following is NOT a product of Compton scatter?

Explanation:
In Compton scatter, a photon transfers part of its energy to a loosely bound or free electron. After the collision you end up with a scattered photon, which has lower energy than the incident one, and a recoil electron that carries away the remaining energy and momentum. This process does not create a photon with a specific, element-dependent energy, nor does it produce a positron. Characteristic photons come from atomic de-excitation after inner-shell vacancies are created, a different mechanism than scattering. A positron would require pair production, not Compton scattering. So the product that is not produced by Compton scatter is a characteristic photon.

In Compton scatter, a photon transfers part of its energy to a loosely bound or free electron. After the collision you end up with a scattered photon, which has lower energy than the incident one, and a recoil electron that carries away the remaining energy and momentum. This process does not create a photon with a specific, element-dependent energy, nor does it produce a positron. Characteristic photons come from atomic de-excitation after inner-shell vacancies are created, a different mechanism than scattering. A positron would require pair production, not Compton scattering. So the product that is not produced by Compton scatter is a characteristic photon.

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