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 // Authors: Elena Guardincerri (Elena.Guardincerri@ge.infn.it)
 //          Alfonso Mantero (Alfonso.Mantero@ge.infn.it)
 //
 // History:
 // -----------
 //  
 //  16 Sept 2001 EG  Modified according to a design iteration in the 
 //                   LowEnergy category
 //
 // -------------------------------------------------------------------
 
 // Class description:
 // Low Energy Electromagnetic Physics: create or fills and manages G4AtomicShell, 
 // G4FluoTransition, G4AugerTransition objects.
 // -------------------------------------------------------------------
 
 #ifndef G4AtomicTransitionManager_h
 #define G4AtomicTransitionManager_h 1
 
 #include "G4ShellData.hh"
 #include "G4FluoTransition.hh"
 #include "G4AugerTransition.hh"
 #include "G4AtomicShell.hh"
 #include <vector>
 #include "globals.hh"
 
 class G4AugerData;
 
 // This class is a singleton
 class G4AtomicTransitionManager {
 
 public: 
   /// The only way to get an instance of this class is to call the 
   /// function Instance() 
   static G4AtomicTransitionManager* Instance();
 
   /// needs to be called once from other code before start of run
   void Initialise();
  
   /// Z is the atomic number of the element, shellIndex is the 
   /// index (in EADL) of the shell
   G4AtomicShell* Shell(G4int Z, size_t shellIndex) const;
    
   /// Z is the atomic number of the element, shellIndex is the 
   /// index (in EADL) of the final shell for the transition
   /// This function gives, upon Z and the Index of the initial shell where 
   /// the vacancy is, the radiative transition that can happen (originating 
   /// shell, energy, probability)
   const G4FluoTransition* ReachableShell(G4int Z, size_t shellIndex) const;
 
   /// This function gives, upon Z and the Index of the initial shell where 
   /// the vacancy is, the NON-radiative transition that can happen with 
   /// originating shell for the transition, and the data for the possible 
   /// auger electrons emitted (originating vacancy, energy amnd probability)  
   const G4AugerTransition* ReachableAugerShell(G4int Z, G4int shellIndex) const;
   
   /// This function returns the number of shells of the element
   /// whose atomic number is Z
   G4int NumberOfShells(G4int Z) const;
   
   /// This function returns the number of those shells of the element
   /// whose atomic number is Z which are reachable through a radiative
   /// transition
   G4int NumberOfReachableShells(G4int Z) const;
 
   /// This function returns the number of possible NON-radiative transitions 
   /// for the atom with atomic number Z i.e. the number of shell in wich 
   /// a vacancy can be filled by a NON-radiative transition 
   G4int NumberOfReachableAugerShells(G4int Z) const;
 
   /// Gives the sum of the probabilities of radiative transition towards the
   /// shell whose index is shellIndex
   G4double 
   TotalRadiativeTransitionProbability(G4int Z, size_t shellIndex) const;
   
   /// Gives the sum of the probabilities of non radiative transition from the
   /// shell whose index is shellIndex
   G4double 
   TotalNonRadiativeTransitionProbability(G4int Z, size_t shellIndex) const; 
 
   /// Verbosity control
   void SetVerboseLevel(G4int vl) {verboseLevel = vl;};
   G4int GetVerboseLevel(){return verboseLevel;};
 
 private:
   explicit G4AtomicTransitionManager();
 
   ~G4AtomicTransitionManager();
 
   // Hide copy constructor and assignment operator 
   G4AtomicTransitionManager& operator=(const G4AtomicTransitionManager& right);
   G4AtomicTransitionManager(const G4AtomicTransitionManager&);
  
   static G4AtomicTransitionManager* instance;
   // since Augereffect data r stored as a table in G4AugerData, we have 
   // here a pointer to an element of that class itself.
   G4AugerData* augerData;
 
   // the first element of the map is the atomic number Z.
   // the second element is a vector of G4AtomicShell*.
   std::map<G4int,std::vector<G4AtomicShell*>,std::less<G4int> > shellTable;
   
   // the first element of the map is the atomic number Z.
   // the second element is a vector of G4AtomicTransition*.
   std::map<G4int,std::vector<G4FluoTransition*>,std::less<G4int> > transitionTable;
  
   // Minimum and maximum Z in EADL table containing identities and binding
   // energies of shells
   G4int zMin = 1; 
   G4int zMax = 104;
   
   // Minimum and maximum Z in EADL table containing identities, transition 
   // energies and transition probabilities of shells
   G4int infTableLimit = 6;
   G4int supTableLimit = 104;
   G4int verboseLevel;
   G4bool isInitialized;
 };
 
 #endif

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