Question on electron straggling in matter

[echaniot]

Good afternoon,
I am trying to simulate the propagation of electrons in copper. To do so, I fill a Landau distribution with mean the most probable value of energy loss. However, my formula doesn't seem to work as I find that I can have higher energy loss than the electron energy itself!
Could anyone point me to the correct most probable value for energy loss of electrons through matter?
Thank you very much

 

[mfb]

Do you get a most probable value larger than the electron energy? That would mean many electrons get stopped in the material and you cannot use the Landau distribution.

I fill a Landau distribution with mean the most probable value of energy loss

Are you aware that the most probable value and the mean are different for a Landau distribution?