G4empCrossSection.cc

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// $Id$
//
//         
//
// History:
// -----------
//  29 Apr 2009   ALF   1st implementation
//  15 Mar 2011   ALF introduced the usage of G4AtomicShellEnumerator
//  09 Mar 2012   LP  updated methods
//


#include "globals.hh"
#include "G4empCrossSection.hh"
#include "G4Proton.hh"


G4empCrossSection::G4empCrossSection(const G4String& nam)
  :G4VhShellCrossSection(nam),totalCS(0.0)
{ 

  paulShellK = new G4PaulKxsModel();
  orlicShellLi = new G4OrlicLiXsModel();

}

G4empCrossSection::~G4empCrossSection()
{ 

  delete paulShellK;
  delete orlicShellLi;

}

std::vector<G4double> G4empCrossSection::GetCrossSection(G4int Z,
                             G4double incidentEnergy,
                             G4double mass,
                             G4double,
                             const G4Material*) 
{
  std::vector<G4double> crossSections;
  G4ParticleDefinition* aProton = G4Proton::Proton();

  crossSections.push_back( paulShellK->CalculateKCrossSection(Z, mass, incidentEnergy) );

  // this check should be done in the Orlic class, that can handle only protons;
  // however this would lead up tp three checks of the mass, while here we have only one
  // moreover, at the present time,this class handles explicitly Paul and Orlic models,
  // so it can hadle the responsibility of this check too

  if (mass == aProton->GetPDGMass()) {
    crossSections.push_back( orlicShellLi->CalculateL1CrossSection(Z, incidentEnergy) );
    crossSections.push_back( orlicShellLi->CalculateL2CrossSection(Z, incidentEnergy) );
    crossSections.push_back( orlicShellLi->CalculateL3CrossSection(Z, incidentEnergy) );
  }

  else {
    crossSections.push_back( 0. );
    crossSections.push_back( 0. );
    crossSections.push_back( 0. );
  }  
  return crossSections;

}

G4double G4empCrossSection::CrossSection(G4int Z, G4AtomicShellEnumerator shell,
                     G4double incidentEnergy,
                     G4double mass,
                     const G4Material*)
{

  //let's reproduce  

  G4double res = 0.0;
  G4ParticleDefinition* aProton = G4Proton::Proton();
  if(fKShell == shell) { 
    res = paulShellK->CalculateKCrossSection(Z, mass, incidentEnergy);
  } 
  // this check should be done in the Orlic class, that can handle only protons;
  // however this would lead up tp three checks of the mass, while here we have only one
  // moreover, at the present time,this class handles explicitly Paul and Orlic models,
  // so it can hadle the responsibility of this check too


  else if (mass == aProton->GetPDGMass()) {
    
    if(fL1Shell == shell) { 
      res = orlicShellLi->CalculateL1CrossSection(Z, incidentEnergy);
    } 
    else if(fL2Shell == shell) { 
      res = orlicShellLi->CalculateL2CrossSection(Z, incidentEnergy);
    } 
    else if(fL3Shell == shell) { 
      res = orlicShellLi->CalculateL3CrossSection(Z, incidentEnergy);
    } 
  }
  return res;
}

std::vector<G4double> G4empCrossSection::Probabilities(G4int Z,
                               G4double incidentEnergy,
                               G4double mass,
                               G4double deltaEnergy,
                               const G4Material* mat)
{
  
  std::vector<G4double> crossSections = GetCrossSection(Z, incidentEnergy, mass, deltaEnergy,mat);

  for (size_t i=0; i<crossSections.size(); i++ ) {
    
    if (totalCS) {
      crossSections[i] = crossSections[i]/totalCS;
    }
    
  }

  return crossSections;

}


void G4empCrossSection::SetTotalCS(G4double val){

  totalCS = val;

}