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On Wed, 25 Dec 2013 14:53:25 GMT, Hans Wenzel wrote:
> Dear Hani > > Geant 4 can't help you getting the Birks constant. For Geant 4 the > constant is a input value that you have to provide and > which comes from an experimental measurement (literature). Once you have > provide the value you can calculate the reduced using the code snippet > below > that I took from Andrea Dotti. I have also attached a root macro that > shows the suppression curve for a few materials that I found in the > literature. >
You can find another simple example of this in TestEm3 (in extended/electromagnetic): - Birks constant C1 is put in material data in DetectorConstruction.cc (around line 173) - Birks correction is done in SteppingAction.cc
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