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Thanks again Alain! However, I did everything you mention: HRPhysicsList.cc: ... #include "HadronPhysicsLHEP_PRECO_HP.hh" ... RegisterPhysics( new HadronPhysicsLHEP_PRECO_HP("hadron")); // no other "hadron" physics (otherwise cross section is too low, // maybe each physics process is counted twice then?) ... Makefile: ... EXTRALIBS += -lLHEP_PRECO_HP EXTRALIBS += -lPackaging ... CPPFLAGS += -I$(G4LISTS_BASE)/lists/LHEP_PRECO_HP/include CPPFLAGS += -I$(G4LISTS_BASE)/lists/Packaging/include ... cd $G4HERE/hadronic_lists/lists/LHEP_PRECO_HP make # I think it was up to date anyway echo $NeutronHPCrossSections ~/MC/geant4/data/G4NDL I think, everything is set up properly. Compiling and Linking works. The Geant executable finds the low energy neutron data in ~/MC/geant4/data/G4NDL . It simulates the triton production properly (I checked with bulk He3). The thermal neutron behaviour in the PE block looks reasonable. Hm. This is tricky. Maybe the measurements are wrong ;-) Cheers, Joachim
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