Nuclear Physics NAT Level – 2 - Physics MCQ

If the energy of the α particle emitted by ²³¹Am is 5.48 MeV, find the distance of closest approach between the α particle and ¹⁹⁷Au nucleus (in 10^–4 m)

Calculate the typical K.E. expected of an α particle confined within a nucleus if its emitted energy is 10 MeV. (Answer in MeV)

Assume the nuclear potential to be square will of potential V = –10 MeV.

Given that the nucleus density varies with r

where ρ₀ = 0.14 nucleon/fm³,  R = 1.07 A^1/3 and  a = 0.54  fm.

Find the surface thickness i.e. the distance between which density drops from 0.9ρ₀ to 0.1ρ₀ (in fm upto two decimal places)

The binding energy of a heavy nucleus is about 7 MeV/nucleon, whereas the B.E of a medium weight nucleus is about 8 MeV/nucleon. Therefore the total K.E liberated when a heavy nucleus undergoes symmetric fission is (in MeV).

What should be the order of the energy of the electron beam which is to be used to explore the nuclear charge distribution (take the radius to be of the order of 10 fm) and also nucleon charge distribution (r = 0.8 fm)(in GeV)

When α particles are directed onto atoms in a thin metal foil, some make very close collisions with the nuclei of the atom and are scattered at large angles. If an α particle with an initial kinetic energy of 5MeV happens to be scattered through an angle of 180°. Find the distance of closest approach to the scattering nucleus. (in fm)

A sample of radioactive nuclei of a certain element can decay only by γ emission and β emission. If half life for γ emission is 24 minutes and that for γ emission  is 36 minutes, the half life for the sample is how much? (in minutes)