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 α - particle.
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a
4.4 MeV
b
5.4 MeV
c
5.6 MeV
d
6.5 MeV
answer is B.
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Detailed Solution
K1+K2=5.5MeVFrom conservation of linear momentum2K1(216m)1/2=2K2(4m)1/2; K2=54K1From the above K2 = 5.4 MeV