Hi guys, been really struggling with this question for a while now and can't make heads or tail of it.
Question:
A beam of α particles with kinetic energy T=10 MeV and current of 10^3 particles per second is incident on a gold (Au A=197 Z=79) foil of thickness 1*10^-6m. Calculate the number of hits per hour on a detector of area 0.0001 m^2 situated 0.75 m from the foil at 10º. The density of gold is 19.3E3 kg m^-3
Relevant Equations-
My attempt-
I'm not sure how to them use the second equation.
(sorry it's not letting me attach files)
Thank you.