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Forum: Documentation and Examples
Re: Question Problem with rdecay02 example (Robert Pattie)
Date: 08 Jul, 2015
From: Robert Pattie Jr. <Robert Pattie Jr.>

Below is the error message I receive. I don't quite understand why GEANT would need the mean free path for 128I, since there should be only 1 atom of it per initial neutron. Again this is using the rdecay02 example with the neutron.mac input macro.

G4CrossSectionDataStore::GetCrossSection ERROR:  no isotope cross section found
  for I128 off Element Na  in NaI Z= 11 A= 23 E(MeV)= 6.43e-06
In /usr/local/geant/geant4.10.00.p03/source/processes/hadronic/cross_sections/src/, line 198: 
===>  no applicable data set found for the isotope

-------- EEEE ------- G4Exception-START -------- EEEE -------
*** G4Exception : had002
      issued by : G4HadronicProcess::GetMeanFreePath
In /usr/local/geant/geant4.10.00.p03/source/processes/hadronic/cross_sections/src/, line 198: 
===>  no applicable data set found for the isotope
Unrecoverable error in the method GetMeanFreePath of hadElastic
TrackID= 10  ParentID= 1  I128
Ekin(GeV)= 6.43e-09;  direction= (-0.634472,0.771314,0.0501913)
Position(mm)= (0,0,-3.46853);  material NaI
PhysicalVolume  <Target>
 Cross section is not available

*** Fatal Exception *** core dump *** -------- EEEE -------- G4Exception-END --------- EEEE -------

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