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Consider the nuclear decay reaction. ....

Consider the nuclear decay reaction.
`._(z)^(A)Xrarrunderset(z-1)AY+_(+)._(1)^(0)e+v`
For the above `beta^(+)` decay reaction to the feasible what should be the minimum difference in atomic masses of X and Y? Rest mass of v is nearly zero.

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The correct Answer is:
Twice the mass of an electron.
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