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None shooting CsI targets with electrons  

Forum: Physics List
Date: 27 Apr, 2009
From: <csi505>

Hi, 
   In my simulation I'm shooting CsI targets with electrons which can have energies between 29-120 keV.These electrons will emit a cascade of delta electrons producing clusters of eV secondary electrons because of the extraordinarily low work function (0.1-0.2 eV) of CsI.
   The thickness of CsI is about 100 nm.
   I think I will get many electrons leaving the CsI bulk,but I got a few.
So what's the problem?

  Here is part of my PhysicsList:

  defaultCutValue = 0.000001*mm;
  cutForGamma = defaultCutValue;
  cutForElectron = defaultCutValue;
  cutForProton    = 0.001*mm;
  SetVerboseLevel(1);
  G4ProductionCutsTable::GetProductionCutsTable()->SetEnergyRange(100.*eV, 1*GeV);

   if (particleName == "gamma") {
      // gamma         
      pmanager->AddDiscreteProcess(new G4PenelopePhotoElectric);
      pmanager->AddDiscreteProcess(new G4PenelopeCompton);
      pmanager->AddDiscreteProcess(new G4PenelopeGammaConversion);
      pmanager->AddDiscreteProcess(new G4PenelopeRayleigh);     
    } else if (particleName == "e-") {
      //electron
      pmanager->AddProcess(new G4MultipleScattering,     -1, 1, 1);
      pmanager->AddProcess(new G4PenelopeIonisation,     -1, 2, 2);
      pmanager->AddProcess(new G4PenelopeBremsstrahlung, -1,-1, 3);	    
    } else if (particleName == "e+") {
      //positron
      pmanager->AddProcess(new G4MultipleScattering,     -1, 1, 1);
      pmanager->AddProcess(new G4PenelopeIonisation,     -1, 2, 2);
      pmanager->AddProcess(new G4PenelopeBremsstrahlung, -1,-1, 3);      
      pmanager->AddProcess(new G4PenelopeAnnihilation,    0,-1, 4);
    }

  It seems when the low energy electrons are created in the CsI bulk most of them will not leave CsI bulk because of a very short range in CsI.

  I also have used  LowEnergy  PhysicsList, but the result is still wrong.

  what's the problem?

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1 Idea: Re: shooting CsI targets with electrons   (Vladimir Ivanchenko - 18 May, 2009)
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