|Message: Re: 30 keV protons: delta ray production on thin carbon foil||Not Logged In (login)|
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On Sun, 05 Jun 2011 14:22:48 GMT, Emil Frlez wrote: > Hi GEANT4 experts - > > I am using the geant4.9.4/examples/extended/electromagnetic/TestEm5/ > as a template. I start with ~30 keV protons that I would like to shoot thru > a 1E-4*mm thick carbon foil. I would like to count and track the delta ray > electrons ejected from the foil by going-thru protons. > > Looking at my PhysicsList.cc it appears that the delta ray production > by protons is not included and, indeed, my protons produce no electrons > passing thru the foil (only StepLimiter, Transportation, msc, hIoni appear > as processes). I was trying to google the G4 forums and the rest > of the web, attempting to find an example of how to add delta ray production > by hadrons to my Physics List, but was unable to find anything that would > help me (I assume I just have to add a few lines in the PhysicsList.cc? > For a proton of 30 keV, the maximum energy transferable to an e- is Tmax= 65 eV. Minimal production threshold of standard em processes is 1 keV, and 250 eV for lowEnergy extension. No chance to produce d-rays !