|Message: Re: G4ParticleGun substituted for G4GeneralParticleSource||Not Logged In (login)|
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I presume your issue is making the same distribution of primary particles with G4ParticleGun and G4GeneralParticleSource. Since you did not post the macro file you used to control G4GeneralParticleSource, it is not possible to identify what was wrong in your PrimaryGeneratorAction implementation. But one thing I noticed is the following.
> // fParticleGun->SetParticleMomentumDirection(G4ThreeVector(2*G4UniformRand()-1,2*G4UniformRand()-1,2*G4UniformRand()-1));
With this line it seems you intended to shoot primary particles evenly to all 4-pi direction. But you need to shoot particles evenly to all the solid angle.
You may want to refer this example code.
Hope this helps,
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