[gate-users] about the acolinearity of two gamma photons

[Sebastien JAN]

Hi Yuxuan,


>  1. If a backtoback gamma source is used, is the acolinearity be simulated?


No, the acolinearity class is called only for e+e- annihilation

>  2. If a isotope source is used, (F18, O15, etc), is the acolinearity be 
> simulated?

Yes, in this case the acolinearity is always simulated.


> but in the Physics Reference Manual of Geant4, the acolinearity should 
> be calculated in
> Geant4.


Could you send me the page where you have read this information in the 
G4 guide ? (or the class name which simulates this process)

Thanks
Seb


> 
> Anyone can give some explainations about that? Thanks.
> 
> 
> Yuxuan ZHANG
> 
> 
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