Geant4-DNA simulation of the pre-chemical stage of water radiolysis and its impact on initial radiochemical yields

This paper demonstrates the impact of pre-chemical stage, especially dissociation scheme and associated probabilities, on water radiolysis simulation using Geant4-DNA Monte Carlo track structure toolkit. The models parameters provided by TRACs have been collected implemented into Geant4-DNA. In order to evaluate their influence simulation, radiochemical yields (G-values) are evaluated as a function time LET “chem6” example, they compared with published experimental calculated data. new lead better agreement literature data than default Geant4-DNA, for OH radicals H2O2. revised chemistry constructor “G4EmDNAChemistry_option3” is available in version 10.7.