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Forum: Event and Track Management
Re: None secondary particle tracks are generated with wrong times in G4NeutronHPFissionFS (Victor_Makarov)
Re: Feedback Re: secondary particle tracks are generated with wrong times in G4NeutronHPFissionFS (Gumplinger Peter)
Date: 05 Sep, 2007
From: Victor_Makarov <Victor_Makarov>

Hello. thanks for fast relpy! I added some lines to print out time variables in G4NeutronHPFissionFS:

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

G4double gtime = 0.0;

gtime = theTrack.GetGlobalTime();

G4cout << "global time2 "<<gtime<<G4endl;

time += theTrack.GetGlobalTime();

G4cout << "sum time2 "<<time<<G4endl;

Here's the extract of tracking verbose one one of delayed neutrons' creation:

*********************************************************************************************************
* G4Track Information:   Particle = neutron,   Track ID = 34703,   Parent ID = 34211
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume        Time     Process
    2   4.62 cm  -2.79 cm   2.96 m    1.21 MeV     0 eV      0 fm   1.54 cm         U235       187 ns     initStep
global time2 187.34243
sum time2 2.2556391e+09
Number of secondaries = 1
Number of photons = 0
Number of Prompt = 0
Number of delayed = 1
    3   3.77 cm  -2.25 cm   2.97 m       0 eV      0 eV   1.27 cm   2.82 cm         U235       187 ns   HadronFission
    :----- List of 2ndaries - #SpawnInStep=  1(Rest= 0,Along= 0,Post= 1), #SpawnTotal=  1 ---------------
    :   3.77 cm  -2.25 cm   2.97 m     417 keV   neutron
    :----------------------------------------------------------------- EndOf2ndaries Info ---------------

*********************************************************************************************************
* G4Track Information:   Particle = neutron,   Track ID = 34966,   Parent ID = 34703
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume        Time     Process
    0   3.77 cm  -2.25 cm   2.97 m     417 keV     0 eV      0 fm      0 fm         U235       187 ns     initStep
    1   4.96 cm  -2.69 cm   2.97 m     414 keV     0 eV   1.27 cm   1.27 cm         U235       189 ns     hElastic
    :----- List of 2ndaries - #SpawnInStep=  1(Rest= 0,Along= 0,Post= 1), #SpawnTotal=  1 ---------------
    :   4.96 cm  -2.69 cm   2.97 m    3.28 keV U235[0.0]

As we can see, the delay part of time is about 2.25 second - typical time of neutrons' delay from fission. But new track still begins at time point of fission proccess.

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1 None: Re: secondary particle tracks are generated with wrong times in G4NeutronHPFissionFS   (Koi, Tatsumi - 07 Sep, 2007)
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