A fission reaction is given by , where and are two particles. Considering to be at rest, the kinetic energies of the products are denoted by , , (2 MeV) and (2 MeV), respectively. Let the binding energies per nucleon of , and be 7.5 MeV, 8.5 MeV and 8.5 MeV, respectively. Considering different conservation laws, the correct option(s) is(are)
← JEE Advanced 2015 · Paper 2
PhysicsMultiple correct+4 / -2Question 16 of 60
JEE Advanced 2015 · Paper 2, Physics question 16
Answer and worked solution
Official answer: A
Conservation laws.
- Charge: , so x and y are neutral.
- Nucleon number: .
So x and y are two neutrons.
Energy released.
The neutrons take 4 MeV, leaving 215 MeV for Xe and Sr.
Sharing. Their momenta are (nearly) equal and opposite, so :
(A)