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Forum: Fast Simulation, Transportation & Others
Re: Question Forced Compton interaction with Penelope model (Chibueze Zimuzo)
Re: None Re: Forced Compton interaction with Penelope model (Luciano Pandola)
Date: 17 Apr, 2008
From: Vladimir IVANTCHENKO <vnivanch@mail.cern.ch>

On Thu, 17 Apr 2008, Luciano wrote:

> *** Discussion title: Fast Simulation, Transportation & Others
> Email replies to PublicHyperNews@slac.stanford.edu must include:
>   In-Reply-To: <"/fastsim/38/1"@geant4-hn.slac.stanford.edu>
>   Subject: ...change this to be about your reply.
> 
> Hello
> 
> > My problem is to increase Compton scattering in a silicon detector. 
> > I followed the instruction in the previous tread on fanoCavity but 
> > it didn't work for me as I am using PenelopeCompton which doesn't 
> > setModel method as in G4ComptonScattering.
> Right. The G4PenelopeCompton() has not the same interface as 
> G4ComptonScattering().
> 
> What exactly do you need to do? Would be enough for you to inactivate all 
> other gamma processes, so that Compton scattering has not competitors? 
> 
> Ciao,
> Luciano
> 

Sorry Luciano,

It is not so simple. Unfortunatelly, for today we have no forced
interactions in both EM packages. There is a possibility of cross section
biasing only for few high energy processes with very low cross sections.

What can be done for today: create user action whihc use following logic:
if no Compton happen in the volume of interest, then a particular gamma is
killed (or event is killed). However, this trick should be done 
accurately.

VI

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