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On Tue, 23 Aug 2005, sylvia studeny wrote: > *** Discussion title: Geometry > Email replies to PublicHyperNews@slac.stanford.edu must include: > In-Reply-To: <"/geometry/432"@geant4-hn.slac.stanford.edu> > Subject: ...change this to be about your reply. > > Hi, > I found a strange thing while running a simple parametriesed volume > example: > I took novice/exampleN02 and changed the geometry into a 10cm*10cm*10cm > box consisting of voxels of the size 2mm*2mm*5mm out of soft tissue. This > box I but into a mother volume (out of air). > I put a point source of 1MeV protons just at the surface of the box. > When I looked at the tracks I saw a really strange thing: the protons > penetradted much to deeply into the matter. > Apperently, I just managed to shoot them into a gap between the voxels, > which is filled with the mother-volume-material=air. > Similar things happen when I take Photons or other energies. > > My question now is: Im using geant4.7.0p1 on SuSe Linux 9.1. Is this > thing I found a mistake on my side ?(I thought a put the voxels close to > each other, like in the examples, all is running fine,no errors) If not, > will it be fixed in future versions of geant4? (e.g. when the new > "Optimised navigation for voxelised phantom geometries" will be > released) > > I hope someone can answer. Thanks, Sylvia > 1) Put all you voxels inside mother box of water. 2) Check number of steps of a proton. VI
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