Wat is the formula of Impact Parameter (b) and scatering angle?

Please help soon.

Thank U

Hello,

Impact parameter(b) is given by

Where Z = Atomic number of nucleus

θ = Observed scattering angle.

KE = Kinetic Energy of α-particle

e = charge on electron

Hence we see that impact parameter depends upon, K.E of alpha particles, the mass of target nucleus and the scattering angle.

You can find scattering angle from this formula.