|Message: Re: Does Geant4 support partially ionized ion beams||Not Logged In (login)|
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Normally, this question is for EM physics forum and not for particle forum. In the EM forum are several discussions on the subject.
An ion interact with media and change its charge state very quickly if it is solid or liquid media, slower in gases at normal condition. It is not true for low-pressure gases or vacuum.
In Geant4 by default we assume equilibrium between ion charge and media. You may try out $G4INSTALL/examples/extended/electromagnetic/TestEm7 ion.mac where it is possible to define ion with A,Z and whatever charge. You will see that independently on initial charge state ion range is the same.
Microbeam example shows how to use alternative ion ionisation model which does not change charge state of an ion.
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