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Forum: Documentation and Examples
Re: Question DNAPhysics: Ionisation coordinates out of box (satya)
Date: 13 Aug, 2012
From: Michael H. Kelsey <Michael H. Kelsey>

On Mon, 13 Aug 2012 15:00:06 GMT, satya wrote:
> Hello Geant4 users,
> 
> I have a query with regard to ionisation coordinates that are displayed
> out of box when I executed DNAPhysics example in a 1cm ^(3) of box with
> water. I ran a 1 MeV Proton beam and observed that some coordinates are
> negative for example: X = -1.01e-06 mm = -1.01e-07 cm which I do not
> understand because it is out of our box dimensions.

The geometry for a box has the origin of coordinates at the center. You supply _half-length_ dimensions for X, Y, and Z, and the coordinates run from -(half-length) to +(half-length) on each axis.

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1 None: Re: DNAPhysics: Ionisation coordinates out of box   (satya - 13 Aug, 2012)
(_ None: Re: DNAPhysics: Ionisation coordinates out of box   (Mike Kelsey - 13 Aug, 2012)
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