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On Fri, 21 Mar 2008 firstname.lastname@example.org wrote: > *** Discussion title: Physics List > Email replies to PublicHyperNews@slac.stanford.edu must include: > In-Reply-To: <"/phys-list/466"@geant4-hn.slac.stanford.edu> > Subject: ...change this to be about your reply. > > Hello, I am simulating production of neutrinos from the interaction of 1 Gev protons with mercury target. > I am using precompiled list "QGSP_BIC". One of the processes is the production of negative pions which decay to negative muons. > This negative muons can undergo capture or decay processes. If it is a capture, the mu- should produce muon neutrino; when it decays - > it produces muon neutrino and electron anti-neutrino. In my SteppingAction, I have written the code which, upon finding electron anti-neutrino, > allows to pick out the process that created it. Here is the piece of the code: > > G4Track* track = aStep->GetTrack(); > const G4VProcess *creator_process = track->GetCreatorProcess(); > G4String creator_process_name = creator_process->GetProcessName(); > > Then, I print this info out. And here is what I got for one found electron antineutrino: > > anti_nu_e (trackID=438, status='Alive'): step proc='Transportation' in > Volume='physical_UpBePlug' at position=(34.967185, 31.234776, > -1.5152518) cm Name of creator process:muMinusCaptureAtRest > > I.e. it looks like electron antineutrinos are produced in mu- capture. > > I will appreciate if someone will write his/her ideas about this. Maybe I am doing something wrong in the SteppingAction... > > Thank you, > > Bari. > Hello, This process produce both mu- capture and decay of mu- at muonic atom. In this particular event you will have alos e- and another neutrino. VI
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