|Message: Re: particleHP: missing Doppler brodening for neutrons?||Not Logged In (login)|
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First check the log file you get when you run your simulation. Do you see "Find a flag of G4NEUTRONHP_NEGLECT_DOPPLER" anywhere? If so, Doppler broadening has been turned off to improve CPU performance. t will need to be re-enabled.
Also, there is no Doppler broadening implemented for protons or neutrons above 20 MeV.