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In an alpha -decay the Kinetic energy of...

In an `alpha` -decay the Kinetic energy of `alpha` particle is 48 MeV and Q-value of the reaction is 50 MeV. The mass number of the mother nucleus is :- (Assume that daughter nucleus is in ground state).

A

`96`

B

`100`

C

`104`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
We have `K_(alpha)=(m_(y))/(m_(y)+m_(alpha)).Q " "rArr K_(alpha)=(A-4)/(A).Q" "rArr48=(A-4)/(A).50 " "rArrA=100`
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