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Forum: Electromagnetic Processes
Re: None energy absorption coefficients (Domingo Granero)
Date: 18 Nov, 2002
From: Vladimir Ivanchenko <Vladimir Ivanchenko>

On Mon, 18 Nov 2002, Domingo Granero wrote:

> *** Discussion title: Electromagnetic Processes
> Email replies to PublicHyperNews@slac.stanford.edu must include:
>   In-Reply-To: <"/emprocess/63"@geant4-hn.slac.stanford.edu>
>   Subject: ...change this to be about your reply.
> 
> I am working in the field of Radiotherapy using G4.
>   I have a technical problem in accessing information in G4
>   that I don't know how to resolve it. 
>   The question concerns the fact of how to access the photon 
>   interaction coefficients in G4. 
>   In our study we use variance reduction techniques to estimate kerma 
>   in water. For this study we need the energy absorption coefficients 
>   mu_en.
>   Do you know how can we obtain this data in G4?
> 
>   Thanks in advance.
>   --

Hello,

There is a problem - may be other users can help you. The problem is that
in G4 we are working with cross sections. One can access G4 cross section
for given particle and material. If you know a good way how to obtain
absorbsion coefficients from the cross sections - you problem is solved. 

VI

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