Define impact parameter?

for a given energy of the projectile,does the scattering angle increase or decrease wtih the increase in impact parameter?

Describe the aloha particle scattering experiment for the discovery of nucleus.Define the impact parameter b.

What is the impact parameter at which the scattering angle is 90^@ of rZ=79 and alpha particle of initial kinetic energy of 10 MeV.

Calculate the impact parameter of 5 MeV alpha particle scattered by 10^@ ,when it approaches a gold nucleus.

For a given impact parameterb,does the angle of deflection increase or decrease with the increase in energy?

What is impact parameters for scattering by 180^@ ?

How is impact parameter related to the scattering angle?