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In an alpha -decay, the kinetic energy o...

In an `alpha` -decay, the kinetic energy of `alpha`-particles 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)

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`KE_(alpha)=((A-4)/(A))|Q|rArrA=100`
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