Question

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

• A. 4.4 MeV
• B. 5.4 MeV
• C. 5.6 MeV
• D. 6.5 MeV

Answer 1

Answer: (B)

5.4 MeV

Answer 2

K.E_a = Q = $\left( \frac { 220 - 4 } { 220 } \right)$× 5.5 MeV