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On Fri, 08 May 2009 11:28:22 GMT, Pradip Datta wrote:
> Thanks Giovanni and Michel for your prompt reply. If I can not do it > with Particle Gun then I have to use to GPS. I have never use GPS and > that is why looking for a Particle Gun solution. However thanks for > prompt reply.
You *can* do it with the standard G4ParticleGun. No doubt on that. Thanks Michel for the code snippet.
The advantage of GPS is the wide range of built-in, predefined (=pre-coded) options it has, for position, angular and energy distributions. All options can be driven by Geant4 UI macro commands (as the ones I gave in my previous message).
I'd suggest to see from the presentation the few lines of code you need to modify in your application to give the GPS a try. The GPS is also used in the xray_telescope advanced example.