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Forum: Hits, Digitization and Pileup
Re: Question how to get secondary particle information (Manju Sudhakar)
Date: 24 Jan, 2006
From: Vladimir IVANTCHENKO <vnivanch@mail.cern.ch>

On Tue, 24 Jan 2006, Manju Sudhakar wrote:

> *** Discussion title: Hits, Digitization and Pileup
> Email replies to PublicHyperNews@slac.stanford.edu must include:
>   In-Reply-To: <"/hitsdigits/109"@geant4-hn.slac.stanford.edu>
>   Subject: ...change this to be about your reply.
> 
> Hi .
> 
> I want to get the response of a detector to secondary particles produced when
> high energy protons interact with shielding material around the detector.
> I usually do it with UserSteppingAction.cc, but is there a way to do the 
> same with SensitiveDectectors and Hits ??
> 
> What I want is the energy deposited in the detector due to the different 
> secodaries produced, viz, neutrons, gammas .Will the result obtained using 
> UserSteppingAction.cc be different from that using Sensitive Detectors and 
> Hits ?
> What is the advantage of using Sensitive Detectors and Hits over UserSteppingAction.cc
> ??
> 
> Thanks in advance.
> Manju Sudhakar.
> 

Hello,

The only important difference between SteppingAction and Sensitive 
detector is in fact, that Stepping actions is called on each step and 
SensitiveDetector is called only inside volume to which this Sensitive 
Detector assigned. In practice this mean that in UserSteppiong Action one 
needs to understand in which volume step is done, in SensitiveDetector 
this is provided by G4 tracking. 

Hits can be created in both cases.

VI

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