Protons with Kinetic Energy of 1 $\circ$ from Their Initial Velocity?
A)8

Multiple Choice

Protons with kinetic energy of 1.6 MeV scatter off a lead (Pb) nuclei in a foil target.Each Pb nucleus contains 82 protons.If both the incoming protons and the Pb nuclei can be treated as point objects,what is the differential scattering cross section for the protons to scatter off the Pb nuclei at an angle of 25 ^$\circ$ from their initial velocity?

A) 8.4 * 10^-12 m²/sr
B) 1.6 * 10^-25 m²/sr
C) 2.3 * 10^-15 m²/sr
D) 5.7 * 10^-27 m²/sr
E) 6.4 * 10^-22 m²/sr