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Question Atomic Deexcitation in Penelope Physics 

Forum: Physics List
Date: 09 Feb, 2012
From: Elena Novikova <Elena Novikova>

I thought I will rephrase my question which was (probably mistakenly) placed on another forum.

I noticed that G4EmPenelopePhysics::ConstructProcess() calls G4PenelopeIonisationModel (for e-and e+), which in turn, has an object of the class G4AtomicDeexcitation as one of its private members. At the same time, at the end of the G4EmPenelopePhysics::ConstructProcess() method, G4UAtomicDeexcitation class is engaged.

Thus, two different (?) deexcitation classes (G4AtomicDeexcitation and G4UAtomicDeexcitation) are linked to the same EM physics.

Was that meant to be so, or this is a temporary oversight?

When I am setting G4EmProcessOptions, am I "talking" to G4UAtomicDeexcitation engaged at the end of G4EmPenelopePhysics::ConstructProcess(), or to G4AtomicDeexcitation linked to e- and e+ in the main part of G4EmPenelopePhysics::ConstructProcess()?

The reason I got interested in this was the message on the standard output that appears when running Penelope:

********************************************************** 
*                  W A R N I N G ! ! !                   *
**********************************************************
*                                                        * 
*  Class G4AtomicDeexcitation is obsolete. It has been   *
* discontinued and is going to be removed by next Geant4 * 
*     release please migrate to G4UAtomDeexcitation.     *
*                                                        *
********************************************************** 

I traced that message to the scenario I described above.

Sincerely,

--Elena Novikova.

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