|Message: Thermal neutron interactions with Cadmium||Not Logged In (login)|
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Hi, I am attempting to simulate the thermal neutron interactions with Cadmium. And, I am using Geant4.9.3 with the physics list "NeutronHP" and using "PhotonEvaporation". According to this simulation, I observed gamma-ray peak of 113.6 keV. However the peak was not measured in our experiment. I confirmed the ENSDF (NuDat2.0:http://www.nndc.bnl.gov/nudat2/getdataset.jsp?nucleus=114CD&unc=nds). Then, the gamma-ray of 113.6 keV seems to be generated from only 114Cd(n,n'g). This reaction is inelastic scattering. Some output of the simulation below. DetNo ParticleID ParentID Particle Xposition TotalEN kineticEN massEN ProcName 2 1 0 neutron 0 939.565 2.5e-008 939.565 nCapture 2 8 1 Cd114[0.0] 0.0681591 106076 1.96539e-005 106076 ionIoni 2 7 1 gamma 0.0681591 0.558441 0.558441 0 Transportation 2 6 1 gamma 0.0681591 0.725311 0.725311 0 Transportation 2 5 1 gamma 0.0681591 1.01515 1.01515 0 Transportation 2 4 1 gamma 0.0681591 0.1136 0.1136 0 Transportation <-- 2 3 1 gamma 0.0681591 2.94165 2.94165 0 Transportation 2 2 1 gamma 0.0681591 3.68884 3.68884 0 Transportation According to this, the gamma-ray of 113.6 keV (ParticleID:4) seems to be generated from not inelastic scattering but rather neutron capture. I think this result is incorrect. This cause because of my program? Or data files and program of GEANT4 wrong? I confirmed the z48.a114 in photonevaporation data files. I found the following sentence from z48.a114: 2.412500e+03 1.136000e+02 0.000e+00 1 0.00e+00 6.00 1.170e-01 8.632e-01 8.632e-02 8.162e-03 1.179e-02 1.607e-02 1.607e-03 2.342e-03 2.752e-05 3.701e-05 6.692e-03 Probably the cause is this data. That means photonevaporation data is wrong? I hope anybody has an idea to solve this problem, regards, Takahiro.