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None secondary particle tracks are generated with wrong times in G4NeutronHPFissionFS 

Forum: Event and Track Management
Date: 05 Sep, 2007
From: Victor_Makarov <Victor_Makarov>

I'm investigating delayed neutrons from fission reactions. These are the lines in file G4NeutronHPFissionFS.cc responsible for setting time of delayed neutrons' tracks as secondaries:

G4double time = -std::log(G4UniformRand())/theDecayConstants[i0-Prompt];

time += theTrack.GetGlobalTime();

G4HadSecondary * track = new G4HadSecondary( theNeutrons->operator[]( i0 ) );

track->SetTime(time);

theResult.AddSecondary(track);

As I understand it, at first some time delay constants are read, then they are added to GlobalTime - time point of fission proccess. At last a secondary is created at the result time, so track of delayed neutron must begin with time = -std::log(G4UniformRand())/theDecayConstants[i0-Prompt] + theTrack.GetGlobalTime().

When I do /tracking/verbose 2, I see that the delayed neutron track begins with Global time - time point of fission proccess so that delay is ignored. That confuses me greatly. I guess Geant 4 at some further step ignores the set time of a track and addresses to time point of Fission proccess - the proccess that has created the particle. But I'm too weak in tracking algoritms of Geant...

Any help will be highly appreciated.

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1 Feedback: Re: secondary particle tracks are generated with wrong times in G4NeutronHPFissionFS   (Peter Gumplinger - 05 Sep, 2007)
(_ None: Re: secondary particle tracks are generated with wrong times in G4NeutronHPFissionFS   (Victor_Makarov - 05 Sep, 2007)
(_ None: Re: secondary particle tracks are generated with wrong times in G4NeutronHPFissionFS   (Koi, Tatsumi - 07 Sep, 2007)
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