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// $Id: G4MuPairProduction.cc,v 1.48 2007/05/22 17:35:58 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-01-patch-02 $
//
// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name:     G4MuPairProduction
//
// Author:        Laszlo Urban
//
// Creation date: 30.05.1998
//
// Modifications:
//
// 04-06-98 in DoIt,secondary production condition:
//          range>std::min(threshold,safety)
// 26-10-98 new stuff from R. Kokoulin + cleanup , L.Urban
// 06-05-99 bug fixed , L.Urban
// 10-02-00 modifications+bug fix , new e.m. structure, L.Urban
// 29-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation
// 10-08-01 new methods Store/Retrieve PhysicsTable (mma)
// 17-09-01 migration of Materials to pure STL (mma)
// 20-09-01 (L.Urban) in ComputeMicroscopicCrossSection, remove:
//          if(MaxPairEnergy<CutInPairEnergy) MaxPairEnergy=CutInPairEnergy
// 26-09-01 completion of store/retrieve PhysicsTable
// 28-09-01 suppression of theMuonPlus ..etc..data members (mma)
// 29-10-01 all static functions no more inlined (mma)
// 07-11-01 particleMass becomes a local variable (mma)
// 19-08-02 V.Ivanchenko update to new design
// 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
// 26-12-02 Secondary production moved to derived classes (V.Ivanchenko)
// 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko)
// 08-08-03 STD substitute standard  (V.Ivanchenko)
// 27-09-03 e+ set to be a secondary particle (V.Ivanchenko)
// 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko)
// 10-02-04 Add lowestKinEnergy (V.Ivanchenko)
// 17-08-04 Utilise mu+ tables for mu- (V.Ivanchenko)
// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
//
// -------------------------------------------------------------------
//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

#include "G4MuPairProduction.hh"
#include "G4Electron.hh"
#include "G4Positron.hh"
#include "G4MuonPlus.hh"
#include "G4MuonMinus.hh"
#include "G4MuPairProductionModel.hh"
#include "G4UniversalFluctuation.hh"

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

using namespace std;

G4MuPairProduction::G4MuPairProduction(const G4String& name)
  : G4VEnergyLossProcess(name),
    theParticle(0),
    theBaseParticle(0),
    lowestKinEnergy(1.*GeV),
    isInitialised(false)
{}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

G4MuPairProduction::~G4MuPairProduction()
{}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

void G4MuPairProduction::InitialiseEnergyLossProcess(const G4ParticleDefinition* part,
                                                     const G4ParticleDefinition*)
{
  if (!isInitialised) {
    isInitialised = true;

    theParticle = part;
    SetSecondaryParticle(G4Positron::Positron());
    SetIonisation(false);

    G4MuPairProductionModel* em = new G4MuPairProductionModel();
    em->SetLowestKineticEnergy(lowestKinEnergy);
    G4VEmFluctuationModel* fm = new G4UniversalFluctuation();
    em->SetLowEnergyLimit(0.1*keV);
    em->SetHighEnergyLimit(100.0*TeV);
    AddEmModel(1, em, fm);
  }
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

void G4MuPairProduction::PrintInfo()
{
  G4cout << "      Parametrised model "
         << G4endl;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....