Problem 796

Summary: Tracking low energy electrons
Product: Geant4 Reporter: fengyx
Component: processes/electromagnetic/lowenergyAssignee: Maria.Grazia.Pia
Status: CLOSED INVALID    
Severity: major CC: fengyx
Priority: P2    
Version: 7.1   
Hardware: PC   
OS: Other   

Description fengyx 2005-09-23 00:29:50 CEST 
Dear Sir,

I re-send this question because I have not gotten  any solution yet.

Could you please forward the question to someone who has expreience in using
GEANT4 to track low energy electrons (~10eV)?

 I am trying to track e- below 1 keV, for an example about 10eV.
In order to do this, I set the cut off as 1.mm and 0.000001 mm for electrons,
because the range for low energy electron is very small, but
I did not get any electron below one keV in both cases. The initial energy of
electron is 662 keV.

Could you please show me how to get the tracking of electrons below 1.0 keV?

Thanks,

Yuxin
Comment 1 Maria.Grazia.Pia 2005-09-29 03:06:59 CEST 
The current version of Geant4 Low Energy Electromagnetic Package has the
capability  to handle electrons correctly down to 250 eV. It is explained in the
documentation that below this threshold the accuracy of the simulation cannot be
guaranteed, and it is recommended not to use the current lowenergy
electromagnetic processes below this limit.
A new set of Low Energy Electromagnetic processes, specialised in the very low
energy range down to a few electronvolts, is currently under development. They
will be avilable in future Geant4 releases.