|Message: Re: How to distinguish the first Compton scattering and the multiple Compton scattering of gamma||Not Logged In (login)|
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There are different ways to do it. Please look in the Geant4 Users Guide for Application Developers I suggest to look at the subject of user stepping actions. Your stepping action can identify a Compton scattering, and add data to the current track ( as 'user data' - which would be one of your own classes ) such as a counter of Compton scatterings - for the current track. // User information G4VUserTrackInformation* GetUserInformation() const; void SetUserInformation(G4VUserTrackInformation* aValue); Looking for an example which exercises this class I found the following: ./extended/runAndEvent/RE01/ A different approach would be to kill a gamma after it undertakes a first Compton scattering. Whether this fulfil your requirements, you can say. John P.S. Alternatively you could create a 'Trajectory', =================================================== John Apostolakis, PH Department, CERN > On 27 Jan 2015, at 02:43, yanxin0221 <firstname.lastname@example.org> wrote: > > > *** Discussion title: Physics List > > Hi everyone, > I need to count the the first Compton scattering of gamma in the medium but i don't know how to distinguish the first Compton scattering and the multiple Compton scattering of gamma . Any help will be thankful. > > ------------------------------------------------------------- > Visit this GEANT4 at hypernews.slac.stanford.edu message (to reply or unsubscribe) at: > http://hypernews.slac.stanford.edu/HyperNews/geant4/get/phys-list/865.html