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None Re: Standard physics vs low energy physics 

Forum: Medical Applications
Re: None Standard physics vs low energy physics (Eleni)
Date: 09 Jul, 2012
From: Eleni <Eleni>

Thanks a lot for your reply.

Why penelope gives more accurate results?
Is it because penelope and standard physics use different multiple  
scattering theory? Or is there any difference in the cross-section  

Quoting Vladimir IVANTCHENKO <>:

> Hello,
> In 9.4p02 bremsstrahlung spectrun provided by Penepole or Livermore  
> is more accurate. With newest version of Genat4 - 9.5p01 Standard  
> Opt3, Livermore and Penelope are nearly the same.
> VI
> On Sat, 7 Jul 2012, Eleni wrote:
>> *** Discussion title: Medical Applications
>> Hello all,
>> I am simulating a medical linac. After running a number of simulations I
>> end up with better results (while comparing G4 results with my
>> experiment results concerning the bremsstrahlung spectra) by using Low
>> energy Physics (penelope). while in the README file of the medical linac
>> example the recommended EM library is the Standard_option3. How could be
>> explained? I am using G4 version 4_9_4 patch02
>> Thanks in advance
>> -------------------------------------------------------------
>> Visit this GEANT4 at message (to reply  
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