Dear G4 team,
I am curious about the efficiency of the particle HP model and I would like to know if someone has done comparisons with MCNP for neutron transport. I know that the Doppler on the fly certainly has a huge impact on the computation time since cross-sections are sampled at each collision. Hence, I guess G4 and MCNP could maybe be compared activating the SetNeglectDoppler variable (removing on the fly Doppler).
I am curious about two questions:
- By turning off the Doppler on the fly, am I really turning off Doppler Broadening or only the sampling of the cross-sections at each collision ? Maybe there is a process that Broaden cross-sections at initialization of the calculation when SetNeglectDoppler is activated?
- What is the efficiency of G4 calculation speed for HP neutrons compared to MCNP for example? Is it similar?
Thanks a lot for your answers,