Problem 997 - Wrong energy balance for Ne + n (15 MeV)
Summary: Wrong energy balance for Ne + n (15 MeV)
Status: RESOLVED LATER
Alias: None
Product: Bugzilla
Classification: Unclassified
Component: general (show other problems)
Version: other
Hardware: All All
: P5 trivial
Assignee: tkoi
URL:
Depends on:
Blocks:
 
Reported: 2008-01-30 10:18 CET by gennady.vasilyev
Modified: 2008-01-31 04:15 CET (History)
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Description gennady.vasilyev 2008-01-30 10:18:50 CET 
When interacting 15 MeV neutron with Ne the
secondary proton and neutron have the energy  675 and 681 MeV.
Physics list _BIC_HP. Cross section for Ne element is replaced by sodium 
cross section.


G4Track Information: Particle = neutron, Track ID = 1, Parent ID = 0 *****************************************
****************************************************************

Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng  NextVolume ProcName
    0        0        0       10        15        0        0         0       World initStep
    1        0        0        5        15        0        5         5    Absorber Transportation
    2        0        0    -3.74         0        0     8.74      13.7    Absorber NeutronInelastic
        :----- List of 2ndaries - #SpawnInStep=  2(Rest= 0,Along= 0,Post= 2), #SpawnTotal=  2 ---------------
        :         0         0     -3.74       675            neutron
        :         0         0     -3.74       681             proton

Best regards, G.I.Vasilyev.
Comment 1 tkoi 2008-01-31 04:15:02 CET 
Thank you for reporting problem.

I just confirmed your problem and found what made this complete unphysical result. What I found is some sodium isotope data in G4NDL is incomplete, so that the problem also happens in reaction between neutron and some sodium isotope. Because the isotope is unstable, so that usual sodium element does not have the isotope fortunately. However, I also found at least several other isotope data are incomplete and make same troubles.
Those data were introduced before I became developer. And new data which I introduced have not this trouble. However the replacement of wrong files is not light job at all. So I can not tell you when I will do it at this moment.

Tatsumi