On an average, a neutron loses half of its energy per collision with a quesi-free proton. To reduce a `2 MeV` neutron to a thermal neutron having energy `0.04 eV`, the number of collisions requaired is nearly .

A neutron makes a head-on elastic collision with a stationary deuteron. The fraction energy loss of the neutron in the collision is

A neutron makes a head-on elastic collision with a stationary deuteron. The fraction energy loss of the neutron in the collision is

A neutron makes is a head - on elastic collision with a stationary deuteron The fraction energy loss of the neutron in the collision is

A neutron with an energy of 4.6 MeV collides elastically with proton and is retarded. Assuming that upon each collision the neutron is deflected by 45^(@) , find the number of collisions which will reduce its energy to 0.23 eV .

A neutron with an energy of 4.6 MeV collides elastically with proton and is retarded. Assuming that upon each collision the neutron is deflected by 45^(@) , find the number of collisions which will reduce its energy to 0.23 eV .

A neutron with an energy of 4.6 MeV collides elastically with proton and is retarded. Assuming that upon each collision the neutron is deflected by 45^(@) , find the number of collisions which will reduce its energy to 0.23 eV .

A neutron moving at a speed v undergoes a head-on elastic collision with a nucleus of mass number A at rest. The ratio of the kinetic energies of the neutron after and before collision is :