[gate-users] Doppler broadening effect

[Assen Kirov]

Hi Sang-June,

GATE uses GEANT4's physics processes.
So if you call the low-energy extension you should have Doppler 
broadening effects
since according to GEANT4's manual it is accounted for E< 5 MeV.
Assen

sangjune park wrote:

> Dear all,
>  
> The Doppler broadening effect is strongly dependent on both scattering 
> medium and incidence particle energy.
> EGS4+KEK extension, EGSnrc, GEANT4 include Doppler broadening effect.  
> In the physics process of the GATE, the Compton formula is derived 
> under the conditions that the electron is free and at rest. Therefore, 
> it looks GATE does not include Doppler broadening.  If I am wrong, 
> please give me information regarding how to include Doppler broadening 
> effect in GATE simulation.
>  
> Thank you for your help in advance.
> Best,
> Sang-June Park
>
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-- 
Assen S. Kirov, Ph.D.
Assistant Attending Physicist
Department of Medical Physics, Room S-1119H
Memorial Sloan-Kettering Cancer Center
1275 York Avenue,  New York, NY 10021
tel (212) 639-7126, fax (212) 717 3010


 
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