Q. The fission of $\ ^{235}U$ can be triggered by the absorption of slow neutrons by a nucleus. Similarly a slow proton can also be used. This statement is
A) Correct
B) Wrong
C) Information is insufficient
D) None of these
Explanation
(b) Because the neutron has no electric charge, it experience no electric repulsion from a $U^{235}$ nucleus. Hence a slow moving neutron can approach and enter a $U^{235}$ nucleus, thereby providing the excitation needed to trigger fission. By contrast a slow moving proton feels a strong repulsion from a $U^{235}$ nucleus. It never get’s close to the nucleus, so it cannot trigger fission
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.