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None NeutronHPFission gives small yields of gamma 

Forum: Hadronic Processes
Date: 21 Jul, 2008
From: Victor_Makarov <Victor_Makarov>

Hello! The HP stuff still is full of surprises! I discovered that HP fission model (for example, using 238 Uran) simălates fission with gamma yield very rarely. Most of the fission reactions are given with no secondary gammas. Further I compare typical lists of secondaries generated by G4NeutronHPFission VS G4ParafissionModel

Parafission Model

example 1

   :----- List of 2ndaries - #SpawnInStep= 11(Rest= 0,Along= 0,Post=11), #SpawnTotal= 13 ---------------
    :   2.33 cm   4.77 cm   -4.9 km    711 keV   neutron
    :   2.33 cm   4.77 cm   -4.9 km   2.37 MeV     gamma
    :   2.33 cm   4.77 cm   -4.9 km   2.22 MeV     gamma
    :   2.33 cm   4.77 cm   -4.9 km   1.26 MeV     gamma
    :   2.33 cm   4.77 cm   -4.9 km    954 keV     gamma
    :   2.33 cm   4.77 cm   -4.9 km    101 MeV  Y97[0.0]
    :   2.33 cm   4.77 cm   -4.9 km     20 eV      gamma
    :   2.33 cm   4.77 cm   -4.9 km   1.91 MeV   neutron
    :   2.33 cm   4.77 cm   -4.9 km    456 keV   neutron
    :   2.33 cm   4.77 cm   -4.9 km   4.81 MeV     gamma
    :   2.33 cm   4.77 cm   -4.9 km   74.4 MeV I139[0.0]

example 2

:----- List of 2ndaries - #SpawnInStep= 13(Rest= 0,Along= 0,Post=13), #SpawnTotal= 13 ---------------
    :   1.02 cm   2.99 cm   -4.9 km   1.69 MeV   neutron
    :   1.02 cm   2.99 cm   -4.9 km    580 keV   neutron
    :   1.02 cm   2.99 cm   -4.9 km   1.27 MeV     gamma
    :   1.02 cm   2.99 cm   -4.9 km   1.57 MeV     gamma
    :   1.02 cm   2.99 cm   -4.9 km    350 keV     gamma
    :   1.02 cm   2.99 cm   -4.9 km     93 keV     gamma
    :   1.02 cm   2.99 cm   -4.9 km    199 keV     gamma
    :   1.02 cm   2.99 cm   -4.9 km     62 MeVBa147[0.0]
    :   1.02 cm   2.99 cm   -4.9 km   5.96 MeV     gamma
    :   1.02 cm   2.99 cm   -4.9 km   1.49 MeV     gamma
    :   1.02 cm   2.99 cm   -4.9 km    707 keV     gamma
    :   1.02 cm   2.99 cm   -4.9 km    101 MeV Kr90[0.0]
    :   1.02 cm   2.99 cm   -4.9 km     80 eV      gamma

NeutronHPFission Model

example 1

    :----- List of 2ndaries - #SpawnInStep=  4(Rest= 0,Along= 0,Post= 4), #SpawnTotal=  4 ---------------
    :   2.25 cm  -1.52 cm   -4.9 km   1.92 MeV   neutron
    :   2.25 cm  -1.52 cm   -4.9 km   1.84 MeV   neutron
    :   2.25 cm  -1.52 cm   -4.9 km   2.03 MeV   neutron
    :   2.25 cm  -1.52 cm   -4.9 km    973 keV   neutron

example 2

    :----- List of 2ndaries - #SpawnInStep=  2(Rest= 0,Along= 0,Post= 2), #SpawnTotal=  3 ---------------
    :   1.44 cm  -2.97 cm   -4.9 km   2.73 MeV   neutron
    :   1.44 cm  -2.97 cm   -4.9 km   1.04 MeV   neutron

It's quite a serious mistake that makes the model almost unusable. I wonder if there's any progress on the model.... :(

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