NEET Physics Nuclei Questions Solved

A nucleus with mass number 220 initially at rest emits an α-particle. If the Q value of the reaction is 5.5 MeV, calculate the kinetic energy of the α-particle

(a) 4.4 MeV             (b) 5.4 MeV
(c) 5.6 MeV             (d) 6.5 MeV


Q-value of the reaction is 5.5 eV

i.e. k1+k2=5.5 MeV                            ....(i) 

By conservation of linear momentum


k2=54 k1                                        ....(ii) 

On solving equation (i) and (ii) we get k2 = 5.4 MeV.

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