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Forum: Physics List
Re: None Can I turn off some physics processes in a volume? (long)
Date: 16 Aug, 2007
From: Vladimir IVANTCHENKO <vnivanch@mail.cern.ch>

On Thu, 16 Aug 2007, long wrote:

> *** Discussion title: Physics List
> Email replies to PublicHyperNews@slac.stanford.edu must include:
>   In-Reply-To: <"/phys-list/400"@geant4-hn.slac.stanford.edu>
>   Subject: ...change this to be about your reply.
> 
> Dear Geant4 experts,
>    1)  The case is a gamma pulsed beam impacting a Ti target. A BGO crystal detector is placed 
> behind the target. The dose produced by induced radiation from the target is what I want. 
> But It is found the induced dose recorded in BGO is much higher than expected. I guess much
> part of the dose may come from the activation of detecor itself . So I want to turn off the 
> photonuclear process in the BGO volume to avoid the dose from detector itself. Can I do it?
>     If there is another way to solve my problem, I would like to hear. 
>   2) another question. If I kill the radionulides produced in detector volume in
> UserSteppingAction as soon as these particles produced, will the induced ray still come out
> from these unstable nuclides and contribute to the total dose?
>      Thanks in advance!
> 
> long
> 
>     I
> 

Hello,

You can also try UserStackingAction - classify each new track.

For hadronic interactions you likely will not be able to switch off one 
per G4Region. 

VI 

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