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Forum: Event and Track Management
Re: Question more primary particles than I shot (Iclal Kerem)
Date: 21 Dec, 2006
From: Marc Verderi <Marc Verderi>

Hi Iclal,

Very likely, this is because more than one step in your (thin) sensitive 
volume is done by a few particles: in this case your are counting more 
than one time these tracks.

Cheers,
Marc

Iclal Kerem wrote:

>*** Discussion title: Event and Track Management
>Email replies to PublicHyperNews@slac.stanford.edu must include:
>  In-Reply-To: <"/eventtrackmanage/583"@geant4-hn.slac.stanford.edu>
>  Subject: ...change this to be about your reply.
>
>Dear All,
>
>I have a thin layer of so called 'chamber' which is just a box and its
>purpose is to report me the information about primary particle. When I
>count them in this sensitive volume with the following piece of code
>
> if(aStep->GetTrack()->GetTrackID() == 1 && 
>    aStep->GetTrack()->GetParentID() == 0) ++primary;
>
>I'm not getting the number of primaries which I asked. For 100 GeV 1000
>mu- particles with this counting I'm getting 1002. Is there any idea why
>it could be possible?
>
>cheers, Iclal
>
>  
>

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