In an \( \alpha \)-decay, the kinetic energy of \( \alpha \)-particle is \( 48 \mathrm{MeV} \) a...

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In an \( \alpha \)-decay, the kinetic energy of \( \alpha \)-particle is \( 48 \mathrm{MeV} \) and \( Q \) value of the reaction is \( 50 \mathrm{MeV} \). The mass number of the mother nucleus is (assume that daughter nucleus is in ground state)
(1) 96
(2) 100
(3) 104
(4) none of these
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