G4DNATransformElectronModel.cc

Go to the documentation of this file. Or view the newest version in sPHENIX GitHub for file G4DNATransformElectronModel.cc

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
//
#include "G4DNATransformElectronModel.hh"
#include "G4SystemOfUnits.hh"
#include "G4ParticleChangeForGamma.hh"
#include "G4NistManager.hh"
#include "G4DNAChemistryManager.hh"
#include "G4DNAMolecularMaterial.hh"

//#define MODEL_VERBOSE

G4DNATransformElectronModel::
G4DNATransformElectronModel(const G4ParticleDefinition*,
                            const G4String& nam) :
    G4VEmModel(nam),fIsInitialised(false)
{
  fVerboseLevel = 0;
  SetLowEnergyLimit(0. * eV);
  SetHighEnergyLimit(0.025 * eV);
  fParticleChangeForGamma = 0;
  fpWaterDensity = 0;
  fpWaterDensity = 0;
  fEpsilon = 0.0001 * eV;
}

//______________________________________________________________________
G4DNATransformElectronModel::~G4DNATransformElectronModel()
{}

//______________________________________________________________________
void G4DNATransformElectronModel::
Initialise(const G4ParticleDefinition* particleDefinition,
           const G4DataVector&)
{
#ifdef MODEL_VERBOSE
  if (fVerboseLevel)
    G4cout << "Calling G4DNATransformElectronModel::Initialise()" << G4endl;
#endif
  
  if(particleDefinition->GetParticleName() != "e-")
  {
    G4ExceptionDescription errMsg;
    errMsg << "Attempting to calculate cross section for wrong particle";
    G4Exception("G4DNATransformElectronModel::CrossSectionPerVolume",
                "G4DNATransformElectronModel001", FatalErrorInArgument, errMsg);
    return;
  }

  // Initialize water density pointer
  fpWaterDensity = G4DNAMolecularMaterial::Instance()->
      GetNumMolPerVolTableFor(G4Material::GetMaterial("G4_WATER"));

  if(!fIsInitialised)
  {
    fIsInitialised = true;
    fParticleChangeForGamma = GetParticleChangeForGamma();
  }
}

//______________________________________________________________________
G4double
G4DNATransformElectronModel::CrossSectionPerVolume(const G4Material* material,
                                                   const G4ParticleDefinition*,
                                                   G4double ekin,
                                                   G4double,
                                                   G4double)
{
#if MODEL_VERBOSE
  if (fVerboseLevel > 1)
    G4cout << "Calling CrossSectionPerVolume() of G4DNATransformElectronModel" << G4endl;
#endif
  
  if(ekin - fEpsilon > HighEnergyLimit())
  {
    return 0.0;
  }

  G4double waterDensity = (*fpWaterDensity)[material->GetIndex()];

  if(waterDensity != 0.0)
  {
    return DBL_MAX;
  }

  return 0.0;
}

//______________________________________________________________________
void
G4DNATransformElectronModel::SampleSecondaries(std::vector<G4DynamicParticle*>* /*fvect*/,
                                             const G4MaterialCutsCouple*,
                                             const G4DynamicParticle* particle,
                                             G4double,
                                             G4double)
{
#if MODEL_VERBOSE
  if (fVerboseLevel)
    G4cout << "Calling SampleSecondaries() of G4DNATransformElectronModel" << G4endl;
#endif

  G4double k = particle->GetKineticEnergy();

//    if (k - fEpsilon <= HighEnergyLimit()) // should be already checked
//    {
  const G4Track * track = fParticleChangeForGamma->GetCurrentTrack();
  G4DNAChemistryManager::Instance()->CreateSolvatedElectron(track);
  fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
  fParticleChangeForGamma->ProposeLocalEnergyDeposit(k);
//    }
}