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Re: Bremsstrahlung and geant [message #11070 is a reply to message #11066] Thu, 07 October 2010 11:37 Go to previous messageGo to previous message
asanchez is currently offline  asanchez
Messages: 350
Registered: March 2006
first-grade participant
From: *kph.uni-mainz.de
So coming back to the issue of the
Bremsstrahlung processes by electrons.

If i have well understood, in geant4/3 electrons are treated as mother particle(primary or secondary) losing energy
according with the Bremsstrahlung process and emitting photons.

So the electron in MCtrack should remain as mother particle and the photons are treated as secondaries.


To check that,
use the following

for example the pdgcode of the mother and daughter particles
in geant4


From your MC information
PndEmcPoint * pop;

PndMCTrack* moc=(PndMCTrack*)fMcTr->At(pop->GetTrackID());

if(moc==0)continue;

MotherId= moc->GetMotherID();

if (MotherId==-1)Motherpdg = moc->GetPdgCode(); // case electron as primary mother
else {
PndMCTrack *mother =(PndMCTrack*)fMcTr->At(MotherId); // case electron as secondary mother

Motherpdg = mother->GetPdgCode();
}

See :
http://geant4.cern.ch/G4UsersDocuments/UsersGuides/PhysicsReferenceManua l/html/node42.html#SECTION04422000000000000000
 
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