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Forum: Event and Track Management
Re: Question a question on special cuts per region (Victor_Makarov)
Date: 01 Nov, 2007
From: Makoto Asai <Makoto Asai>

> **************************************************************
> *******************************************
> * G4Track Information:   Particle = neutron,   Track ID = 3,  
>  Parent ID = 1
> **************************************************************
> *******************************************
> 
> Step#      X         Y         Z        KineE    dEStep   
> StepLeng  TrakLeng    Volume     Process
>     0      0 fm      0 fm  -49.9 m    1.73 MeV     0 eV      
> 0 fm      0 fm         Uran    initStep
>     1   -174 um  -67.7 um  -49.9 m       0 eV      0 eV    
> 348 um    348 um         Uran  NeutronInelastic
>     :----- List of 2ndaries - #SpawnInStep=  3(Rest= 0,Along= 
> 0,Post= 3), #SpawnTotal=  3 ---------------
>     :   -174 um  -67.7 um  -49.9 m    1.68 MeV   neutron
>     :   -174 um  -67.7 um  -49.9 m     7.2 keV U235[0.0]
>     :   -174 um  -67.7 um  -49.9 m    51.6 keV     gamma

Hi,

 Production threshold (a.k.a. cuts in Geant4) is applied only
for a few EM processes which have infrared divergence.
Thus, for example, neutron inelastic is a process that is
NOT affected by the production thresholds. If you want to
remove all low energy EM particles artificially, use stacking 
action.

Makoto

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