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Order of Reaction

A γ -rays p...

Question

A $γ - r a y s$ photon is emitted:

A

after ionization of an atom

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B

due to conversion of a neutron into a proton in the nucleus

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C

after de-excitation of a nucleus

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D

due to conversion of a proton into a neutron in its nucleus

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Solution

The correct option is C after de-excitation of a nucleus
Gamma-ray emissions generally take place in excited state parent atom. It happens after energy is still left after $α, β$ and portion emission. Relaxation / de-exciation of parent nucleus takes place.
$X^{*} ⟶ X^{^{'}} + γ r a y s$
excited de-excited

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