Co-60 source in Geant4

Dear All, I installed Geant4 v11 on Ubuntu 22.02 and would like to simulate a setup with Co-60 source. Would you like please tell me if Geant4 has Co-60 source generation and how to use it.

Thank you, Rachid

Geant4 Version: v11
Operating System: Ubuntu 22.04
CMake Version:

/gun/particle ion
/gun/ion 27 60

For the rest of setting up your application, refer to the Application Developers Guide and the Geant4 examples.

I already used rdecay deant4 applications and I used the /gun/ commands and here below the co-60 spectrum:

and it looks like measured spectrum:

The only difference is the continuum spectrum with deem change in baseline at low energy. The beta decay spectrum should continue not jumping like it is at low energy.


I mean the peaks baselines are all flat and different for right peaks and the least energy peak on the left… It seems the baseline level is proportional to the nearby peak., and maybe it depends how rdecay generates the decay products …



Thank you for posting in Geant4 forums.

The gammas (in %) from 60Co decay are the following:


To generate the attached plot:

cd $G4INSTALL/share/Geant4/examples/extended/radioactivedecay/rdecay01/
cmake -B build -S . -D CMAKE_INSTALL_PREFIX=install
cmake --build build -j 6 -- install
./install/bin/rdecay01 Co60.mac 

what you see is the response of the detector to the emitted particles according to the geometry, how energy is recorded and general configuration of the simulation. Could you please make your code public, for example in github?


How are you obtaining the first spectrum? Are you using energy scorers for a particular detector, or else?

To me, it looks like the detector conditioned in the first spectrum is different to the second, probably scored via G4Step or G4Track. If so, it would explain the practical absence of Compton edge.

As @atolosad said, please do upload your code to github for us to view.

Best wishes,

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