|Message: Re: Problem with G4Sphere||Not Logged In (login)|
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Dear Adil, Your problem is in placing the "Iron" volume inside the "PE" volume. > G4VPhysicalVolume * Sphere_Iron_phys > = new > G4PVPlacement > (0,G4ThreeVector(),Sphere_Iron_log,"Sph_Iron_p", > Sphere_PE_log,false,0); In a general sense the iron volume seems inside the outer (and inner) surface of the PE sphere. But because the PE sphere volume extends between 5 and 10 cm in R: G4double R_min_PE= 5.*cm; G4double R_max_PE= 10.*cm; this means that, as a volume, the "Iron" volume is not part of it - ie its points are not inside the PE volume: G4double R_min_Iron= 0.*cm; G4double R_max_Iron= 4.95*cm; In your case you need to make the experimental hall the parent volume of the Iron volume. ( If you had chosen R_min_PE = 0. * cm; then 'inside' was correct. ) Best regards, John Apostolakis