[Gate-users] No annihilations in the phantom but just in the source

[Dimitri DWORAK]

Hi 

I have simulated a spherical source  of F18 with a radius of 0.5mm in a Phantom of Plexiglas but when i plot all 
positions of annihilation between positrons and electrons giving by the Singles file i see that all annihilations are 
in the source (graph is attach to the mail ) they are no scattering of positrons in the phantom.

I have check my physic list and the Multiplescattering  option for e+ and e- is in it.

Could you help me please?

DWORAK Dimitri

 		 	   		  
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