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Question he3 energy losses 

Forum: Particles
Date: 23 Apr, 2017
From: <elder>

Hello All,

  recently I have included he3 ions into my Geant4.10.1  simulations. My experimental setup is pretty simple: vacuum, air (400 mm), two sets of plastic BC-408 scintillation detectors (thin 2 mm and 20 mm thick).
In PhysicsList I have the following processes:

if (particleName == "alpha"||particleName == "deuteron"|| particleName == "He3" ||particleName == "triton")
    {
      G4ionIonisation* ionIoni = new G4ionIonisation();
      pmanager->AddProcess(new G4hMultipleScattering, -1, 1, 1);
      pmanager->AddProcess(ionIoni,       -1, 2, 2);

      }

When I check tritons energy losses in each part of the setup, the results seems ok (confirmed with TRIM calculations), whereas for He3 energy losses are too high. I have checked this for Geant4.10.1 as well as for the latest version of Geatn4. I have used ions energies around 100-200 MeV. For example: He3 energy at 20 deg :

~ 230 MeV to reach the thick detector (it should be around 40 MeV ...)

~ 120 MeV to reach the thin detector

tritons energy at 20 deg :

~ 40 MeV to reach the thick detector

~ 23 MeV to reach the thin detector

I have used defaultCutValue=0.02 mm and tested with higher and lower values, with no success for He3.

Can U comment on this ? It seems like for He3 stopping power is too high.

Thank U.

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1 Feedback: Re: he3 energy losses   (Michael H. Kelsey - 23 Apr, 2017)
(_ Feedback: Re: he3 energy losses   (elder - 24 Apr, 2017)
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