Which of the following processes represents a gamma- decay only ?

Options

A. `""^AX_Z + gamma to ""^AX_(Z-1) + a+b`
B. `""^AX_Z + ""^1n_0 to ""^(A-3)X_(Z-alpha) +c`
C. `""^A X_Z to ""^A X_Z + f`
D. `""^A X_Z + e^(-1) to ""^AX(Z-1) + g`

Answer

B, C

Explanation

`gamma` rays are electromagnetic waves having no charge and mass i.e. A =0 and Z =0 `therefore` There is no change in A and Z of parent and daughter nuclei. This is possible only for C.