Enormous production of Tc100 compared to Tc99m

Hello,

I work on Mo100(p, x)Y nuclear reaction modeling. The Molybdenum100 (92.2% enrichment) target was irradiated by protons with kinetic energies about 10.79 MeV. On the screenshot attached it’s seen that Mo100(p, 2n)Tc99m reaction has higher cross-section than Mo100(p, n)Tc100. However, after bombardment of the target with 10E07 protons I got the following results:

  1. The production of Tc99m: “Tc99[142.683]”: 51
  2. The production of Tc100: “Tc100”: 5707

Both nuclei have protonInelastic creator process.

How is it possible?

I registered G4HadronInelasticQBBC + G4HadronElasticPhysicsHP + G4StoppingPhysics + G4RadioactiveDecayPhysics to my physics list.
I also use the following env. variables:

  • G4NEUTRONHPDATA=/home/ihor/GEANT4/geant4-v11.2.2-install/share/Geant4/data/ G4NDL4.7.1;
  • G4PARTICLEHPDATA=/home/ihor/GEANT4/geant4-v11.2.2-install/share/Geant4/data/G4TENDL1.4 (which corresponds to TENDL-2019);
  • G4PARTICLEXSDATA=/home/ihor/GEANT4/geant4-v11.2.2-install/share/Geant4/data/G4PARTICLEXS4.1;
  • G4PHP_MULTIPLICITY_METHOD=Poisson