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Forum: Event and Track Management
Re: Question interaction force in the origin of coordinates (José Antonio)
Re: Feedback Re: interaction force in the origin of coordinates (Gumplinger Peter)
Date: 10 Jun, 2011
From: Marc Verderi <Marc Verderi>

Dear José,

     Forced interaction functionnality is under develoment at this 
stage. However, we can discuss to find a solution to your problem.

     Please, let me ask a few more details if you are interested to go 
further:

         - you shoot a (primary) gamma
         - at its point of emission you want this gamma to interact
         - do you want the same interaction to always happen (ie : 
always compton, or always pair creation, or always photonuclear, etc.) 
or do you want any valid interaction to randomly occur (ie the gamma 
interacts, and you don't care about what process makes the interaction) ?
         - if the gamma survives to the interaction (say, a compton 
process occured) I guess you don't want to re-force the interaction : is 
this correct ?

Cheers,
Marc


Le 09/06/2011 21:42, Gumplinger Peter a écrit :
> *** Discussion title: Event and Track Management
>
> What you want to do is not so clear. How do you want your photon to
> interact immediately, via G4PhotoElectricEffect, G4ComptonScattering, or
> G4GammaConversion? These are competing processes and the interaction
> length sampled accordingly decides which of them wins out. If, however,
> you want only one type of interaction, and you have access to the G4
> source, you may set:
>
> *condition = Forced;
>
> in PostStepGetPhysicalInteractionLength
>
> There may well be more elegant ways to accomplish this not requiring
> access to the source. Please, read about 'biasing' options.
>
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1 More: Re: interaction force in the origin of coordinates   (José Antonio - 10 Jun, 2011)
(_ Question: Re: interaction force in the origin of coordinates   (Dr. Iwan Cornelius - 13 May, 2012)
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