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Mx and My denote the atomic masses of th...

`M_x` and `M_y` denote the atomic masses of the parent and the daughter nuclei respectively in a radioactive decay. The Q-value for a `beta^(-)` decay is `Q_1` and that for a `beta^(+)` decay is `Q_2`. If `m_e` dentoes the mass of an electron, then which of the following statement is correct?

A

`Q_1=(M_x-M_y)c^2` and `Q_2=(M_x-M_y-2m_e)c^2`

B

`Q_1=(M_x-M_y)c^2` and `Q_2=(M_x-M_y)c^2`

C

`Q_1=(M_x-M_y-2m_e)c^2` and `Q_2=(M_x-M_y+2m_e)c^2`

D

`Q_1=(M_x-M_y+2m_e)c^2` and `Q_2=(M_x-M_y+2m_e)c^2`

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