Low energy photoelectric effect simulation

Physics Lists
1

Hello,
I am doing a simulation of the low energy photoelectric effect, the energy of the gamma is around 8 eV, the material being irradiated is 20nm thick gold, using G4EmStandardPhysics, but no photoelectron production is observed.

I saw that SetLowestElectronEnergy and SetMinEnergy in the G4EmStandardPhysics function are both 100eV, so I set the Cut of gamma and e- to 0.1nm, but still no photoelectron production. However, in reality the work function of gold is around 5.1 eV, and a gamma of 8 eV is sufficient to produce the photoelectric effect. Is Geant4 not able to simulate such a low energy photoelectric effect?

Thanks

2

You may need to move to one of the EM “Options” lists to get that low. In our experment, we are using EM Opt4 (or _EMZ with a physics list name, e.g., “Shielding_EMZ”), in order to see the K, L, and M edges.

Your ProductionCut() settings should work fine. We see 8.43 eV electron secondaries in silicon, for example.