Plot spectrums for each physics

Dear Experts,
I have a electron beam(3GeV) that interact with a thin lead brick.
I’m very excited to be able to plot the spectrums of electrons produced for each physics separately to understand the role of each in each energy.
Is it possible by Fluka?

Best regards,

Dear @rezaei.m.p,
There is no direct way to do what you would like to do.

Do you have any idea by in-direct way?
And I have question about when we tell secondary particle it is included some primary particle that loses energy? or if one electron from primary particle loses energy remain primary particle?

You could dump collision tape with USERDUMP and analyse transport events. It will be quite a tedious analysis though.
If you can consider using MCNP it can do what you want out-of-the-box.