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Question gun/ion syntax and equilibrium charge 

Keywords: gun/ion low energy
Forum: Particles
Date: 26 Jun, 2003
From: Robert Weller <Robert Weller>

Perhaps this is an old question, but I haven't found an answer. In playing with low energy ions (MeV and below), it appears that their range is strongly dependent upon the third parameter of the gun/ion command described as the ion's charge. Ions penetrating matter have equilibrium charge states dependent primarily upon their velocity don't they? And aren't ranges therefore relatively independent of the initial charge of the ion? What then precisely is this third argument? In an earlier posting to this forum, an example "gun/ion 26 56 26" was offered as a fully stripped iron nucleus. I don't think that the initial charge state should make much difference in the range if one of these ions hits, e.g. silicon, but my (admittedly limited) experience with Geant4 seems to suggest that in the simulation it does. Can someone clarify this or point me to an earlier discussion? Thanks.

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1 None: Re: gun/ion syntax and equilibrium charge   (Vladimir Ivantchenko - 27 Jun, 2003)
(_ More: Re: gun/ion syntax and equilibrium charge   (Bob Weller - 27 Jun, 2003)
(_ None: Re: gun/ion syntax and equilibrium charge   (Vladimir IVANTCHENKO - 01 Jul, 2003)
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