fixed link to tg manual

jintonic · May 20, 2024 · d2987f9 · d2987f9
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diff --git a/tutorials/detector/README.md b/tutorials/detector/README.md
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 Instead of using geometry written in C++ as described in detail in the [Geant4 manual](http://geant4-userdoc.web.cern.ch/geant4-userdoc/UsersGuides/ForApplicationDeveloper/html/Detector/Geometry/geomSolids.html), [GEARS][] accepts two types of detector geometry descriptions in pure ASCII format as input:
 
-- Geant4 [text geometry description][tg] (manual: [pdf](https://geant4.web.cern.ch/sites/default/files/geant4/collaboration/working_groups/geometry/docs/textgeom/textgeom.pdf), [html](http://fismed.ciemat.es/GAMOS/GAMOS_doc/GAMOS.6.0.0/Geometry/Geometry.html)) (recommended)
+- Geant4 [text geometry description][tg] (manual: [pdf](https://cern.ch/geant4/collaboration/working_groups/persistency/docs/textgeom.pdf), [html](http://fismed.ciemat.es/GAMOS/GAMOS_doc/GAMOS.6.0.0/Geometry/Geometry.html)) (recommended)
 - [GDML][] (provided for data analysis and visualization in other tools)
 
 Their difference is similar to that between [markdown][md] and [HTML][]. The simpler [text geometry description][tg] provided by [Geant4][] is recommended to be used as [GEARS][]'s input given its simplicity and readability. For example, an experimental hall filled with air and of a dimension of 10 x 10 x 10 meters can be easily implemented using the following line: