|Message: Re: How to make G4MultiFunctionalDetector sensitive to only Compton scattered particles?||Not Logged In (login)|
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Hi, I understand that your application needs to distinguish transmitting photon without interactions from photons with interactions at the detector placed behind the target. Compton scattering does not change the TrackID of the particle and its creator process, we cannot directly identify the interaction after passing through the target. In this case, we have to introduce G4TrackInformation with user parameters for keeping such information, i.e. a flag for presence of Compton scattering. If your requirement could be simplified as counting transmitting photons without interaction, then such photons will be identified by, for example, the vertex position, kinetic energy, and momentum direction. In this case, new SDFilter can be described for this purpose. Is this enough for your purpose? T.Aso
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