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None Low-energy nuclei in gas 

Forum: Hadronic Processes
Date: 11 Feb, 2013
From: Adam Anderson <Adam Anderson>

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?

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2013/02/11/20.46-70340-g4tritonrange.pdf

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1 Idea: Re: Low-energy nuclei in gas   (Vladimir Ivanchenko - 12 Feb, 2013)
1 None: Re: Low-energy nuclei in gas   (Adam Anderson - 13 Feb, 2013)
1 Idea: Re: Low-energy nuclei in gas   (Vladimir Ivanchenko - 15 Feb, 2013)
2 None: Re: Low-energy nuclei in gas   (Adam Anderson - 14 Feb, 2013)
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