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Question angular distribution using G4GeneralParticleSource 

Forum: Particles
Date: 11 Mar, 2014
From: <ChLorenz>

Hi,

I am using the G4GeneralParticleSource to generate my primary particles.
What I want to simulate is the spectrum of a Co60 source and another one of a Eu152 source.
So what I do in the macro file is:

# for Co60
  /gps/particle ion
  /gps/ion 27 60 0 0.
  /gps/ene/mono 0.025 eV
  
# and for Eu152
  /gps/particle ion
  /gps/ion 63 152 0 0.
  /gps/ene/mono 0.025 eV


and I get good spectra.
But now I wondered about the angular distribution of the emitted gammas. So here are my questions:
First: Is the angular distribution implemented? (eg: will the two gammas from the Co60 ion-source be emitted corresponding to the proper angular distribution, or just isotropic?)

Second: If they are emitted uncorrelated (isotropic), how can I implement such a angluar correlation using G4GeneralParticleSource (if it is possible at all...)?


Thanks very much for your help,

Chris

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