Switching Physics Lists

_Geant4 Version:v11.3.0
_Operating System:Windows
Compiler/Version:
CMake Version:

Hello,

I am simulating electrons with energy ranges in the tritium beta decay spectrum, so 0-18.6kev. I am using Microelec to simulate low energy electrons and calculate the backscattering yields on a tungsten slab to beign with. However, the current version of microelec’s inelastic model is only valid up to 10kev, therefore i am trying to use Opt4 processes above 10kev.

Right now, in the microelec construct EM, i am just disabling those processes after 10kev and enabling the standard EM processes used by Opt4 above 10kev, so i am not explicitly registering opt4 (i wasnt sure if you could). This runs, however i am seeing a discontinuity peak at 10 kev for my BEY, and i suspect this is because when i shoot an electron > 10 kev it is handled by Opt4 but when secondaries are created below 10, it then switches back to microelec (which produces a larger yield than opt4). After 10kev the yield begins to slowly decrease again i guess due to less contributions of microelec with the secondaries.

My question is whether there is a way around this? to avoid the sharp peak in yield where the switch is between the two processes?

Thanks