Geant4-DNA physics and radioactive decay chain

Dear Geant4 users,

I am simulating a radioactive decay chain of Ac225 inside a biological cell. When using the Geant4-DNA physics module the daughter isotope (Fr221) doesn’t interact with the surrounding medium. There is no EM physics for Fr221 in Geant4-DNA, so it doesn’t loose energy. Do you have any idea what I can do in order to simulate the whole decay chain with Geant4-DNA (I need Geant4-DNA for scoring the strand breaks of DNA)?

Kind regards,


for today you need a combined PhysicsList which includes both standard and DNA processes. You may by hand add G4ionIonisation process to G4GenericIon. We are working on this problem but were not in time for 11.0.


Dear Vladimir,

thank you for the feedback.

Best regards,