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Forum: Processes Involving Optical Photons
Re: None Surface Concept!!!!! (Davinder Siwal)
Date: 10 Mar, 2011
From: Sam Blake <Sam Blake>

On Thu, 10 Mar 2011 07:26:22 GMT, Davinder Siwal wrote:
> Hii Geant4 Users
> I just want to understand the difference between "G4LogicalSkinSurface"
> and "G4LogicalBorderSurface" i already read the application deveoper
> mannual but it is not clear to me can anybody make me more clear
> understanding.
> thanks

Hi Davinder,

It's funny - I was looking into exactly the same thing yesterday! I found this in Section under "Boundary Processes" in the Application Developer's Manual:

"Surface objects ... are stored in a related table and can be retrieved by either specifying the two ordered pairs of physical volumes touching at the surface, or by the logical volume entirely surrounded by this surface. The former is called a border surface while the latter is referred to as the skin surface."

So, my understanding is that a G4LogicalSkinSurface specifies a surface completely surrounding a single detector volume, whereas a G4LogicalBorderSurface specifies the interface surface between 2 detector volumes that are touching.

Hope this helps, Sam

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1 Agree: Re: Surface Concept!!!!!   (Gumplinger Peter - 10 Mar, 2011)
(_ None: Re: Surface Concept!!!!!   (Davinder Siwal - 10 Mar, 2011)
(_ More: Re: Surface Concept!!!!!   (Gumplinger Peter - 11 Mar, 2011)
(_ None: Re: Surface Concept!!!!!   (Davinder Siwal - 11 Mar, 2011)
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