Q50 / 199 · NTA Abhyas (NEET) 2020 · Physics · Nuclear Physics

If the binding energy per nucleon in  3Li7 and 2He4 nuclei are respectively 5.60 MeV and 7.06 MeV, then the energy of the proton in the reaction  3Li+p→22He 4 is

  • A
    19.6 MeV
     
  • B
    2.4 MeV
     
  • C
    8.4 MeV
     
  • Correct answer
    D
    17.3 MeV
     

Solution

Applying principle of energy conservation.

Energy of proton = total BE of 2 α-energy of Li7

=8×7.06-7×5.6

=56.48-39.2=17.28 MeV

Hence, the correct answer is option: 'D'.

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