G4PenelopeCrossSection.cc

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//
//
// Author: Luciano Pandola
//
// History:
// --------
// 18 Mar 2010   L Pandola    First implementation
// 09 Mar 2012   L. Pandola   Add public method (and machinery) to return
//                            the absolute and the normalized shell cross
//                            sections independently.
//
#include "G4PenelopeCrossSection.hh"
#include "G4SystemOfUnits.hh"
#include "G4PhysicsTable.hh"
#include "G4PhysicsFreeVector.hh"
#include "G4DataVector.hh"
#include "G4Exp.hh"
#include "G4Log.hh"
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...
G4PenelopeCrossSection::G4PenelopeCrossSection(size_t nPointsE,size_t nShells) :
  fSoftCrossSections(nullptr),
  fHardCrossSections(nullptr),fShellCrossSections(nullptr),
  fShellNormalizedCrossSections(nullptr),
  fNumberOfEnergyPoints(nPointsE),fNumberOfShells(nShells)
{
  //check the number of points is not zero
  if (!fNumberOfEnergyPoints)
    {
      G4ExceptionDescription ed;
      ed << "G4PenelopeCrossSection: invalid number of energy points " << G4endl;
      G4Exception("G4PenelopeCrossSection::G4PenelopeCrossSection()",
          "em2017",FatalException,ed);
    }
 
  fIsNormalized = false;
 
  // 1) soft XS table
  fSoftCrossSections = new G4PhysicsTable();
  //the table contains 3 G4PhysicsFreeVectors,
  //(fSoftCrossSections)[0] -->  log XS0 vs. log E
  //(fSoftCrossSections)[1] -->  log XS1 vs. log E
  //(fSoftCrossSections)[2] -->  log XS2 vs. log E
 
  //everything is log-log
  for (size_t i=0;i<3;i++)
    fSoftCrossSections->push_back(new G4PhysicsFreeVector(fNumberOfEnergyPoints));
 
  //2) hard XS table
  fHardCrossSections = new G4PhysicsTable();
  //the table contains 3 G4PhysicsFreeVectors,
  //(fHardCrossSections)[0] -->  log XH0 vs. log E
  //(fHardCrossSections)[1] -->  log XH1 vs. log E
  //(fHardCrossSections)[2] -->  log XH2 vs. log E
 
  //everything is log-log
  for (size_t i=0;i<3;i++)
    fHardCrossSections->push_back(new G4PhysicsFreeVector(fNumberOfEnergyPoints));
 
  //3) shell XS table, if it is the case
  if (fNumberOfShells)
    {
      fShellCrossSections = new G4PhysicsTable();
      fShellNormalizedCrossSections = new G4PhysicsTable();
      //the table has to contain numberofShells G4PhysicsFreeVectors,
      //(theTable)[ishell] --> cross section for shell #ishell
      for (size_t i=0;i<fNumberOfShells;i++)
    {
      fShellCrossSections->push_back(new G4PhysicsFreeVector(fNumberOfEnergyPoints));
      fShellNormalizedCrossSections->push_back(new G4PhysicsFreeVector(fNumberOfEnergyPoints));
    }
    }
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...
G4PenelopeCrossSection::~G4PenelopeCrossSection()
{
  //clean up tables
  if (fShellCrossSections)
    {
      fShellCrossSections->clearAndDestroy();
      delete fShellCrossSections;
    }
  if (fShellNormalizedCrossSections)
    {
      fShellNormalizedCrossSections->clearAndDestroy();
      delete fShellNormalizedCrossSections;
    }
  if (fSoftCrossSections)
    {
      fSoftCrossSections->clearAndDestroy();
      delete fSoftCrossSections;
    }
  if (fHardCrossSections)
    {
      fHardCrossSections->clearAndDestroy();
      delete fHardCrossSections;
    }
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...
void G4PenelopeCrossSection::AddCrossSectionPoint(size_t binNumber,G4double energy,
                          G4double XH0,
                          G4double XH1, G4double XH2,
                          G4double XS0, G4double XS1,
                          G4double XS2)
{
  if (!fSoftCrossSections || !fHardCrossSections)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::AddCrossSectionPoint" <<
    G4endl;
      G4cout << "Trying to fill un-initialized tables" << G4endl;
      return;
    }
 
  //fill vectors
  G4PhysicsFreeVector* theVector = (G4PhysicsFreeVector*) (*fSoftCrossSections)[0];
 
  if (binNumber >= fNumberOfEnergyPoints)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::AddCrossSectionPoint" <<
    G4endl;
      G4cout << "Trying to register more points than originally declared" << G4endl;
      return;
    }
   G4double logEne = G4Log(energy);
 
   //XS0
   G4double val = G4Log(std::max(XS0,1e-42*cm2)); //avoid log(0)
   theVector->PutValues(binNumber,logEne,val);
 
   //XS1
   theVector = (G4PhysicsFreeVector*) (*fSoftCrossSections)[1];
   val =  G4Log(std::max(XS1,1e-42*eV*cm2)); //avoid log(0)
   theVector->PutValues(binNumber,logEne,val);
 
   //XS2
   theVector = (G4PhysicsFreeVector*) (*fSoftCrossSections)[2];
   val =  G4Log(std::max(XS2,1e-42*eV*eV*cm2)); //avoid log(0)
   theVector->PutValues(binNumber,logEne,val);
 
   //XH0
   theVector = (G4PhysicsFreeVector*) (*fHardCrossSections)[0];
   val =  G4Log(std::max(XH0,1e-42*cm2)); //avoid log(0)
   theVector->PutValues(binNumber,logEne,val);
 
   //XH1
   theVector = (G4PhysicsFreeVector*) (*fHardCrossSections)[1];
   val =  G4Log(std::max(XH1,1e-42*eV*cm2)); //avoid log(0)
   theVector->PutValues(binNumber,logEne,val);
 
    //XH2
   theVector = (G4PhysicsFreeVector*) (*fHardCrossSections)[2];
   val =  G4Log(std::max(XH2,1e-42*eV*eV*cm2)); //avoid log(0)
   theVector->PutValues(binNumber,logEne,val);
 
   return;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...
 
void G4PenelopeCrossSection::AddShellCrossSectionPoint(size_t binNumber,
                               size_t shellID,
                               G4double energy,
                               G4double xs)
{
  if (!fShellCrossSections)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::AddShellCrossSectionPoint" <<
    G4endl;
      G4cout << "Trying to fill un-initialized table" << G4endl;
      return;
    }
 
  if (shellID >= fNumberOfShells)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::AddShellCrossSectionPoint" <<
    G4endl;
      G4cout << "Trying to fill shell #" << shellID << " while the maximum is "
         <<  fNumberOfShells-1 << G4endl;
      return;
    }
 
  //fill vector
  G4PhysicsFreeVector* theVector = (G4PhysicsFreeVector*) (*fShellCrossSections)[shellID];
 
  if (binNumber >= fNumberOfEnergyPoints)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::AddShellCrossSectionPoint" <<
    G4endl;
      G4cout << "Trying to register more points than originally declared" << G4endl;
      return;
    }
   G4double logEne = G4Log(energy);
   G4double val = G4Log(std::max(xs,1e-42*cm2)); //avoid log(0)
   theVector->PutValues(binNumber,logEne,val);
 
   return;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...
 
G4double G4PenelopeCrossSection::GetTotalCrossSection(G4double energy) const
{
  G4double result = 0;
  //take here XS0 + XH0
  if (!fSoftCrossSections || !fHardCrossSections)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetTotalCrossSection" <<
    G4endl;
      G4cout << "Trying to retrieve from un-initialized tables" << G4endl;
      return result;
    }
 
  // 1) soft part
  G4PhysicsFreeVector* theVector = (G4PhysicsFreeVector*) (*fSoftCrossSections)[0];
  if (theVector->GetVectorLength() < fNumberOfEnergyPoints)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetTotalCrossSection" <<
    G4endl;
      G4cout << "Soft cross section table looks not filled" << G4endl;
      return result;
    }
  G4double logene = G4Log(energy);
  G4double logXS = theVector->Value(logene);
  G4double softXS = G4Exp(logXS);
 
   // 2) hard part
  theVector = (G4PhysicsFreeVector*) (*fHardCrossSections)[0];
  if (theVector->GetVectorLength() < fNumberOfEnergyPoints)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetTotalCrossSection" <<
    G4endl;
      G4cout << "Hard cross section table looks not filled" << G4endl;
      return result;
    }
  logXS = theVector->Value(logene);
  G4double hardXS = G4Exp(logXS);
 
  result = hardXS + softXS;
  return result;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...
 
G4double G4PenelopeCrossSection::GetHardCrossSection(G4double energy) const
{
  G4double result = 0;
  //take here XH0
  if (!fHardCrossSections)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetHardCrossSection" <<
    G4endl;
      G4cout << "Trying to retrieve from un-initialized tables" << G4endl;
      return result;
    }
 
  G4PhysicsFreeVector* theVector = (G4PhysicsFreeVector*) (*fHardCrossSections)[0];
  if (theVector->GetVectorLength() < fNumberOfEnergyPoints)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetHardCrossSection" <<
    G4endl;
      G4cout << "Hard cross section table looks not filled" << G4endl;
      return result;
    }
  G4double logene = G4Log(energy);
  G4double logXS = theVector->Value(logene);
  result = G4Exp(logXS);
 
  return result;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...
 
G4double G4PenelopeCrossSection::GetSoftStoppingPower(G4double energy) const
{
  G4double result = 0;
  //take here XH0
  if (!fSoftCrossSections)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetSoftStoppingPower" <<
    G4endl;
      G4cout << "Trying to retrieve from un-initialized tables" << G4endl;
      return result;
    }
 
  G4PhysicsFreeVector* theVector = (G4PhysicsFreeVector*) (*fSoftCrossSections)[1];
  if (theVector->GetVectorLength() < fNumberOfEnergyPoints)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetSoftStoppingPower" <<
    G4endl;
      G4cout << "Soft cross section table looks not filled" << G4endl;
      return result;
    }
  G4double logene = G4Log(energy);
  G4double logXS = theVector->Value(logene);
  result = G4Exp(logXS);
 
  return result;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo..
 
G4double G4PenelopeCrossSection::GetShellCrossSection(size_t shellID,G4double energy) const
{
  G4double result = 0;
  if (!fShellCrossSections)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetShellCrossSection" <<
    G4endl;
      G4cout << "Trying to retrieve from un-initialized tables" << G4endl;
      return result;
    }
  if (shellID >= fNumberOfShells)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetShellCrossSection" <<
    G4endl;
      G4cout << "Trying to retrieve shell #" << shellID << " while the maximum is "
         <<  fNumberOfShells-1 << G4endl;
      return result;
    }
 
  G4PhysicsFreeVector* theVector = (G4PhysicsFreeVector*) (*fShellCrossSections)[shellID];
 
  if (theVector->GetVectorLength() < fNumberOfEnergyPoints)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetShellCrossSection" <<
    G4endl;
      G4cout << "Shell cross section table looks not filled" << G4endl;
      return result;
    }
  G4double logene = G4Log(energy);
  G4double logXS = theVector->Value(logene);
  result = G4Exp(logXS);
 
  return result;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo..
 
G4double G4PenelopeCrossSection::GetNormalizedShellCrossSection(size_t shellID,G4double energy) const
{
  G4double result = 0;
  if (!fShellNormalizedCrossSections)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetShellCrossSection" <<
    G4endl;
      G4cout << "Trying to retrieve from un-initialized tables" << G4endl;
      return result;
    }
 
  if (!fIsNormalized)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetShellCrossSection" << G4endl;
      G4cout << "The table of normalized cross section is not initialized" << G4endl;
    }
 
  if (shellID >= fNumberOfShells)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetShellCrossSection" <<
    G4endl;
      G4cout << "Trying to retrieve shell #" << shellID << " while the maximum is "
         <<  fNumberOfShells-1 << G4endl;
      return result;
    }
 
  const G4PhysicsFreeVector* theVector =
    (G4PhysicsFreeVector*) (*fShellNormalizedCrossSections)[shellID];
 
  if (theVector->GetVectorLength() < fNumberOfEnergyPoints)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetShellCrossSection" <<
    G4endl;
      G4cout << "Shell cross section table looks not filled" << G4endl;
      return result;
    }
  G4double logene = G4Log(energy);
  G4double logXS = theVector->Value(logene);
  result = G4Exp(logXS);
 
  return result;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo..
 
void G4PenelopeCrossSection::NormalizeShellCrossSections()
{
  if (fIsNormalized) //already done!
    {
      G4cout << "G4PenelopeCrossSection::NormalizeShellCrossSections()" << G4endl;
      G4cout << "already invoked. Ignore it" << G4endl;
      return;
    }
 
  if (!fShellNormalizedCrossSections)
    {
      G4cout << "Something wrong in G4PenelopeCrossSection::GetShellCrossSection" <<
    G4endl;
      G4cout << "Trying to retrieve from un-initialized tables" << G4endl;
      return;
    }
 
  for (size_t i=0;i<fNumberOfEnergyPoints;i++) //loop on energy
    {
      //energy grid is the same for all shells
 
      //Recalculate manually the XS factor, to avoid problems with
      //underflows
      G4double normFactor = 0.;
      for (size_t shellID=0;shellID<fNumberOfShells;shellID++)
    {
      G4PhysicsFreeVector* theVec =
        (G4PhysicsFreeVector*) (*fShellCrossSections)[shellID];
 
      normFactor += G4Exp((*theVec)[i]);
    }
      G4double logNormFactor = G4Log(normFactor);
      //Normalize
      for (size_t shellID=0;shellID<fNumberOfShells;shellID++)
    {
     G4PhysicsFreeVector* theVec =
        (G4PhysicsFreeVector*) (*fShellNormalizedCrossSections)[shellID];
     G4PhysicsFreeVector* theFullVec =
       (G4PhysicsFreeVector*) (*fShellCrossSections)[shellID];
     G4double previousValue = (*theFullVec)[i]; //log(XS)
     G4double logEnergy = theFullVec->GetLowEdgeEnergy(i);
     //log(XS/normFactor) = log(XS) - log(normFactor)
     theVec->PutValues(i,logEnergy,previousValue-logNormFactor);
    }
    }
  fIsNormalized = true;
 
  return;
}