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NEET Sample Paper NEET Sample Test Paper-55

  • question_answer
    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

    Correct Answer: B

    Solution :

    \[{{K}_{\alpha }}\,\,=\,\,48\text{ }MeV\] \[Q=50\text{ }MeV\] \[\Rightarrow \,\,{{K}_{\alpha }}\,\,=\,\,\left( \frac{A-4}{A} \right)\,Q\] \[48\,\,=\,\,\left( \frac{A-4}{A} \right)\,50\]3= (^). \[24\,A=\left( 25\,A-100 \right)\] \[(A=100)\]


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