|Message: Re: Energy loss of ions||Not Logged In (login)|
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On Tue, 31 Aug 2004, Take R. Saito wrote: > *** Discussion title: Particles > Email replies to PublicHyperNews@slac.stanford.edu must include: > In-Reply-To: <"/particles/83"@geant4-hn.slac.stanford.edu> > Subject: ...change this to be about your reply. > > Hi, > I am simulating some tracking detectors with ions. > I am kepping the velocity beta and the Lorentz factor > gamma to be 0.94 and ~3 respectively, which corresponds to > ions with about 1.9 A GeV. > I am using /gun/ion command. > If I do "/gun/ion 1 1 1" then it produced "proton". > If I do "/gun/ion 2 4 2" then "alpha". > The energy loss in the material of alpha is about 4 > times larger than for proton and it is consistent to the > expected z^2 dependence. However, the strange thing happens > if I do "/gun/ion 3 6 3". The energy loss is much smaller than > for proton and the energy loss doesn't change if I change to > different ions and or I change the charge state. > Could somebody help me to solve this problem? > Thank you in advance. > With my best regards, Take > Try to look into example of PhysicsList in example/extended/electromagnetic/TestEm7,9 VI
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