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Which of the following pair of scattering is important for therapeutic purposes?

Which of the following pair of scattering is important for therapeutic purposes? Correct Answer Pair Production and Disintegration

In pair production, an incoming photon of 1.02 MeV reacts with the nucleus and disintegrates into a positron and negatron. Positron due to high energy and low mass gets repelled from the nucleus and on meeting an electron, annihilation takes place. In disintegration, a high energy photon is absorbed by the nucleus which makes it excited and radioactive. To become stable again, it emits various radiations. Since both these techniques emit a large variety of radiations, they are used to destroy the cancerous cells and thus used for therapeutic purposes.

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