Radioisotope thermal generators are the nuclear battery used to give power and energy to other systems. The reaction of the Pu element to produce U and helium atom ion will occur in RTG. Thus, option C is correct.
What are radioisotopes?
Radioisotopes are substances that release an immense amount of energy when they are in their unstable form to gain stability. It produces a new particle and nucleus from gamma radiation.
The reaction ²³⁸₉₄Pu → ²³⁴₉₂U + ⁴₂He²⁺ releases energy and heat that are used in the RTGs to convert them into electricity that is used as the source of power.
Therefore, option C. the decay of Pu element is used in RTGs.
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