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Question Re: what is the meanning of parameters in the SetParticleMomentumDirection() 

Forum: Particles
Re: Question what is the meanning of parameters in the SetParticleMomentumDirection() (Hyunduk.Kim)
Re: Idea Re: what is the meanning of parameters in the SetParticleMomentumDirection() (Jeong Han Lee)
Date: 11 Jun, 2014
From: Dong WANG <Dong WANG>

Recently I was using this methods to specify the direction of the particle in 
Geant4.9.6 but there was something I can not understand . After I specify the 
direction to Z plus plane (defined by SetParticleMomentumDirection  ( 
G4ThreeVector (0,0,1) ) ) , the postion of the particle was not to the plus Z 
plane but in random direction .
    Is there any thing wrong while I using this method ? Does the definition I 
used above could define the particle to directly Z PLUS plane ?

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