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Question Re: how to trace back a track 

Forum: Event and Track Management
Re: Question how to trace back a track (Maura E.M.)
Re: Feedback Re: how to trace back a track (Gumplinger Peter)
Date: 28 Jul, 2016
From: Maura E.M. <Maura E.M.>

Thank you. I added the statements you suggested to capture the 1st Compton interaction. Again in my phase space file I just got a lot of e- produced by Compton events but no photon at all. Then I added some printout statements and figured out that the following test

if (aStep->GetPostStepPoint()->GetProcessDefinedStep()->GetProcessName() == "compt")

always returned "false" because the process name was "Transportation" . I am still wondering how to distinguish photons produced by Compton interactions from my primary photons. Maybe a test on the Compton photon energy that should be below the primary photon energy (which is known) ? But this way I could not tell the "depth" of Compton interactions. I only have to dump to the phase space file the 1st-order Compton photons.

Best regards, maura

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2016/07/28/05.42-63536-MyNtupleScorer3.cc
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2016/07/28/05.42-83701-MyNtupleScorer3.hh

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