I want to shoot two photons in specific positions, But since I am very new in Geant I have difficulties of creating my initial macro file in Geant.
I cannot understand what type of source I have to use or how to define their different position.
Or if when I say pos/type circle what it basically means.
The only I want basically is two shoot two photons in each event starting from different positions and shooting in a small uniformy cricle each of them and in different energies. And I want do it only in the macro file.
Thank you very much in advance for any help it would be very appreciated