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Forum: Geometry
Re: Question Water VS G4_WATER (Daniel Sánchez Parcerisa)
Re: Idea Re: Water VS G4_WATER (Vladimir Ivanchenko)
Date: 05 Feb, 2010
From: michel maire <michel maire>

On Wed, 03 Feb 2010 19:49:02 GMT, Vladimir Ivanchenko wrote:
> Hello,
> G4_WATER is constructed via Geant4 internal database allowing to use
> internal data on density effect parameterisation and ICRU'73 data on
> stopping powers. Thus, absolute ranges and Bragg peak position are more
> precise with g4 9.3 and G4_WATER. In the case of hand-made material it
> is not possible to access these data and stopping powers/ranges are
> sample using general algorithm which is less precise.

 to give more detail : ICRU'73 data have nothing to do with G4 nist material data base. ICRU data must be acceded by name and it has been decided to index them with nist material list name.
 So, if you build your material by hand but call it G4_WATER, you will access ICRU'73 data.


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1 Ok: Re: Water VS G4_WATER   (Daniel Sánchez Parcerisa - 08 Feb, 2010)
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