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Forum: Analysis
Re: None Range of Particle = Track Length of particle in G4 ?
Date: 18 Aug, 2003
From: Vladimir Ivanchenko <Vladimir Ivanchenko>

On Tue, 12 Aug 2003 boinee@fisica.uniud.it wrote:

> *** Discussion title: Analysis
> Email replies to PublicHyperNews@slac.stanford.edu must include:
>   In-Reply-To: <"/analysis/34"@geant4-hn.slac.stanford.edu>
>   Subject: ...change this to be about your reply.
> 
> Dear all
> 
> According to NIST (
> http://physics.nist.gov/PhysRefData/Star/Text/appendix.html )
> 
> Projected range is defined as the average value of the depth to which a
> charged particle will penetrate in the course of slowing down to rest.
> This depth is measured along the initial direction of the particle.
> 
> Now my question is how to calculate this range for the primary particle
> only in G4,
> 
> is it ok to capture the tracklength of the primary particle, in
> PostUserTrackingAction method of USerTrackingAction class !
> 

I don't think so, because a particle will scatter. What can be used is the 
coordinates of the end point of the track. I would also suggest that the 
distribution of the end point will be analised not simply average value.

VI

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