|Message: Low-energy nuclei in gas||Not Logged In (login)|
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I am simulating low-energy protons (572keV) and tritons (191keV) in TPC filled with a mixture of He3 and CF4. I was checking the range of the particles after being injected, when I noticed some strange behavior (see attached plot). The stopping range of the triton appears to have a sharp peak and some minimum value, followed by multi-peaked distribution. This strongly disagrees with the range and distribution that I simulate in SRIM-2013. Moreover, on physical grounds, one would at least expect a single-peaked distribution for the range of the ions.
I am using QGSP_BERT_HP in this simulation. Is this physicslist expected to simulation ions well at these energies? Is this a known problem in geant4, or is there a physics model available that would produce more realistic results?
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