Let me give a real example:
There is an Iron Atom: It consists 26 electons and 26 protons.
If an electron has a cross section 0.66E-28 m2
What would an Iron Atom has a cros section?
Maybe 52 times 0.66E-28m2 ?
This is the questions.
Can we make an analogy like in the link below...
I have read about "Thompson Cross section for free electrons"
My problem is there must be the other cross sections
photons are scattered by free electrons.
photons must be scattered by aka protons and as well by alpha particles.
Is there any defined cross sctions for the other particles as...