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Forum: Particles
Re: Question calculate particles within a cone (Summit)
Date: 28 May, 2012
From: Gumplinger Peter <Gumplinger Peter>

In your StackingAction::ClassifyNewTrack(const G4Track* aTrack), you put:

aTrack->GetMomentumDirection();

Now, you have the direction of a (any) secondary. With that you can figure out whether the direction is within the cone you desire; very simple if the cone axis is the z-axis, still simple if your axis is some other direction.

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