[Gate-users] Oxygen15 source

[Marlen Priegnitz]

Hello Ashley,

I think this message occurs, because 15O is a positron emitter. As far 
as I understood, this message is produced when a positron escapes the 
world without annihilation. This topic is discussed several times in the 
GATE Users talk.
I experienced, that the simulation crashes when this warning occurs to 
often.
Only some of these warnings should not cause problems.
Why this message doesn't occur with 18F I don't know.

Hope this helps.

Marlen


Ashley Devarim wrote:
> Dear GATE users,
>
> I'm simulating Oxygen15 source and during simulation GATE gives me this warning :
>
> [GateTrajectoryNavigator::FindAnnihilationGammasTrackID]  WARNING : positron found and photonID vector size: 1
>
>
> I would like to mention that I don't have this warning when I'm simulating Fluor18 
>
> Can you help me understand this problem please
>
>
> Thank you very much
>
> Ashley
>
>
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