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Question positronium tracking 

Forum: Particles
Date: 23 Jul, 2009
From: Tom Roberts <Tom Roberts>

I want to simulate the transport, stripping in matter, and decay in flight of positronium. I clearly need to implement physics processes for the last two; I'll model their creation externally, interfacing into GeneratePrimaries(). I'll also need to create ParticleDefinition-s for ortho- and para-positronium, and possibly metastable positronium -- what PDG encodings (IDs) should I use? In general, how are PDG encoding-s assigned for particles not already in the Geant4 source tree?

[I remark that the two-photon production related to para-positronium decay was just discussed in the electromagnetic processes forum, though it may be more appropriate to interface into G4Decay; advice on that is also welcome.]

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