[Gate-users] gps/particle ion

[Margaret Morris]

Hello Gate Users,
 

I know that the ion source is simulated by defining its atomic number (Z), atomic weight (A), ionic charge in units of energy (Q), and its excitation energy in keV (E). 
 
Has anyone known how I can get the Q and E values for standard point sources such as Cs-137, Na-22 and Co-60? I have looked at table of isotopes but I could not find anything. These quantities may be known with different names!
 
It was mentioned in the GATE User Guide examples that Q and E for F-18 are 0. Are these real values or only for demonstration purpose?
 
Thank you in advance for help.
 
Margaret