Question
Physics Question on Nuclear physics
The Q -value of a nuclear reaction and kinetic energy of the projectile particle, K p are related as :
A
Q = K p
B
(K p + Q) < 0
C
Q < Kp
D
(K p + Q) > 0
Answer
(K p + Q) > 0
Explanation
Solution
The correct answer is (D) : (K p + Q) > 0
K p> 0
If Q is released ⇒ _Q _> 0
⇒ K p + Q> 0
If Q is absorbed ⇒ _Q _< 0
Even then particle has to be given kinetic energy greater than magnitude of Q to maintain momentum conservation.
⇒ K + _Q _> 0