I'm a Physics undergraduate at University and in my labs module I had to recreate the Rutherford Scattering experiment. The basic setup was similar to this: My problem is that this setup only records data in one plane and not 3D. In reality the particles are scattered in a sort of cone similar to this: One of the tasks is to correct for this so that I can compare my results to Rutherford's scattering formula. I have no idea how to do it and after looking all over the internet all I could come up with talks about solid angle which I haven't even covered in University. I think I may be over-complicating this issue and I'm hoping someone can help me.