[gate-users] 3 photon annihilation

[Sebastien Jan]

Hi Elfatih,

Concerning the production of one or 3 (or more...) photons after a e+e-
annihilation :

You can find some informations in the G4eplusAnnihilation class
(source/processes/electromagnetic/standard/  include or src) like this
one :

//
// Note 2: The annihilation processes producing one or more than two
photons are
//         ignored, as negligible compared to the two photons process.
//
So this is a Geant4 "cut" and not a specificity of GATE.

If you want to include a new gamma production after annihilation, you
need to develop your specific class from G4eplusAnnihilation.

Hope this helps

Seb


--
Sebastien JAN - CEA DSV/DRM/SHFJ
4 pl. Général Leclerc           Tel (33) 01 69 86 78 21
91406 Orsay France              Fax (33) 01 69 86 77 49
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