#include <G4BGGPionElasticXS.hh>

Inheritance diagram for G4BGGPionElasticXS:

Collaboration diagram for G4BGGPionElasticXS:

Public Member Functions
	G4BGGPionElasticXS (const G4ParticleDefinition *)

virtual	~G4BGGPionElasticXS ()

virtual G4bool	IsElementApplicable (const G4DynamicParticle , G4int Z, const G4Material )

virtual G4bool	IsIsoApplicable (const G4DynamicParticle , G4int Z, G4int A, const G4Element elm=0, const G4Material *mat=0)

virtual G4double	GetElementCrossSection (const G4DynamicParticle , G4int Z, const G4Material mat=0)

virtual G4double	GetIsoCrossSection (const G4DynamicParticle , G4int Z, G4int A, const G4Isotope iso=0, const G4Element elm=0, const G4Material mat=0)

virtual void	BuildPhysicsTable (const G4ParticleDefinition &)

virtual void	CrossSectionDescription (std::ostream &) const

Public Member Functions inherited from G4VCrossSectionDataSet
	G4VCrossSectionDataSet (const G4String &nam="")

virtual	~G4VCrossSectionDataSet ()

G4double	GetCrossSection (const G4DynamicParticle , const G4Element , const G4Material *mat=0)

G4double	ComputeCrossSection (const G4DynamicParticle , const G4Element , const G4Material *mat=0)

virtual G4Isotope *	SelectIsotope (const G4Element *, G4double kinEnergy)

virtual void	DumpPhysicsTable (const G4ParticleDefinition &)

virtual G4int	GetVerboseLevel () const

virtual void	SetVerboseLevel (G4int value)

G4double	GetMinKinEnergy () const

void	SetMinKinEnergy (G4double value)

G4double	GetMaxKinEnergy () const

void	SetMaxKinEnergy (G4double value)

const G4String &	GetName () const

Additional Inherited Members
Protected Member Functions inherited from G4VCrossSectionDataSet
void	SetName (const G4String &)

Protected Attributes inherited from G4VCrossSectionDataSet
G4int	verboseLevel

Detailed Description

Definition at line 64 of file G4BGGPionElasticXS.hh.

Constructor & Destructor Documentation

G4BGGPionElasticXS::G4BGGPionElasticXS ( const G4ParticleDefinition * )

Definition at line 56 of file G4BGGPionElasticXS.cc.

  : G4VCrossSectionDataSet("Barashenkov-Glauber") 
 {
   verboseLevel = 0;
   fGlauberEnergy = 91.*GeV;
   fLowEnergy = 20.*MeV;
   fSAIDHighEnergyLimit = 2.6*GeV;
   SetMinKinEnergy(0.0);
   SetMaxKinEnergy(100*TeV);
 
   for (G4int i = 0; i < 93; i++) {
     theGlauberFac[i] = 0.0;
     theCoulombFac[i] = 0.0;
     theA[i] = 1;
   }
   fPion = 0;
   fGlauber = 0;
   fHadron  = 0;
   fSAID    = 0;
   particle = 0;
   theProton= G4Proton::Proton();
   isPiplus = false;
   isInitialized = false;
 }

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G4BGGPionElasticXS::~G4BGGPionElasticXS ( )

virtual

Definition at line 83 of file G4BGGPionElasticXS.cc.

 {
   delete fSAID;
   delete fHadron;
   delete fPion;
   delete fGlauber;
 }

Member Function Documentation

void G4BGGPionElasticXS::BuildPhysicsTable ( const G4ParticleDefinition & p )

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 191 of file G4BGGPionElasticXS.cc.

 {
   if(&p == G4PionPlus::PionPlus() || &p == G4PionMinus::PionMinus()) {
     particle = &p;
   } else {
     G4cout << "### G4BGGPionElasticXS WARNING: is not applicable to " 
        << p.GetParticleName()
        << G4endl;
     throw G4HadronicException(__FILE__, __LINE__,
       "G4BGGPionElasticXS::BuildPhysicsTable is used for wrong particle");
     return;
   }
 
   if(isInitialized) { return; }
   isInitialized = true;
 
   fPion    = new G4UPiNuclearCrossSection();
   fGlauber = new G4ComponentGGHadronNucleusXsc();
   fHadron  = new G4HadronNucleonXsc();
   fSAID    = new G4ComponentSAIDTotalXS();
 
   fPion->BuildPhysicsTable(*particle);
   fGlauber->BuildPhysicsTable(*particle);
 
   if(particle == G4PionPlus::PionPlus()) { isPiplus = true; }
 
   G4ThreeVector mom(0.0,0.0,1.0);
   G4DynamicParticle dp(particle, mom, fGlauberEnergy);
 
   G4NistManager* nist = G4NistManager::Instance();
 
   G4double csup, csdn;
   G4int A;
 
   if(verboseLevel > 0) {
     G4cout << "### G4BGGPionElasticXS::Initialise for "
        << particle->GetParticleName() << G4endl;
   }
   for(G4int iz=2; iz<93; iz++) {
 
     A = G4lrint(nist->GetAtomicMassAmu(iz));
     theA[iz] = A;
 
     csup = fGlauber->GetElasticGlauberGribov(&dp, iz, A);
     csdn = fPion->GetElasticCrossSection(&dp, iz, A);
 
     theGlauberFac[iz] = csdn/csup;
     if(verboseLevel > 0) {
       G4cout << "Z= " << iz <<  "  A= " << A 
          << " factor= " << theGlauberFac[iz] << G4endl; 
     }
   }
   /*
   dp.SetKineticEnergy(fLowEnergy);
   fHadron->GetHadronNucleonXscNS(&dp, G4Proton::Proton());
   theCoulombFac[1] = fHadron->GetElasticHadronNucleonXsc();
   */
   dp.SetKineticEnergy(fSAIDHighEnergyLimit);
   fHadron->GetHadronNucleonXscPDG(&dp, theProton);
   theCoulombFac[1] = 
     fSAID->GetElasticIsotopeCrossSection(particle,fSAIDHighEnergyLimit,1,1)
     /fHadron->GetElasticHadronNucleonXsc();
 
   dp.SetKineticEnergy(fLowEnergy);
   for(G4int iz=2; iz<93; iz++) {
     theCoulombFac[iz] = fPion->GetElasticCrossSection(&dp, iz, theA[iz]);
     if(verboseLevel > 0) {
       G4cout << "Z= " << iz <<  "  A= " << A 
          << " factor= " << theCoulombFac[iz] << G4endl; 
     }
   }
 }

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void G4BGGPionElasticXS::CrossSectionDescription ( std::ostream & outFile ) const

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 265 of file G4BGGPionElasticXS.cc.

 {
   outFile << "The Barashenkov-Glauber-Gribov cross section handles elastic\n"
           << "scattering of pions from nuclei at all energies. The\n"
           << "Barashenkov parameterization is used below 91 GeV and the\n"
           << "Glauber-Gribov parameterization is used above 91 GeV.\n";
 }

G4double G4BGGPionElasticXS::GetElementCrossSection	(	const G4DynamicParticle *	dp,
		G4int	Z,
		const G4Material *	mat = `0`
	)

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 113 of file G4BGGPionElasticXS.cc.

 {
   // this method should be called only for Z > 1
 
   G4double cross = 0.0;
   G4double ekin = dp->GetKineticEnergy();
   G4int Z = ZZ;
   if(1 == Z) {
     cross = 1.0115*GetIsoCrossSection(dp,1,1);
   } else {
     if(Z > 92) { Z = 92; }
 
     if(ekin <= fLowEnergy) {
       cross = theCoulombFac[Z];
     } else if(ekin > fGlauberEnergy) {
       cross = theGlauberFac[Z]*fGlauber->GetElasticGlauberGribov(dp, Z, theA[Z]);
     } else {
       cross = fPion->GetElasticCrossSection(dp, Z, theA[Z]);
     }
   }
   if(verboseLevel > 1) {
     G4cout << "G4BGGPionElasticXS::GetElementCrossSection  for "
        << dp->GetDefinition()->GetParticleName()
        << "  Ekin(GeV)= " << dp->GetKineticEnergy()
        << " in nucleus Z= " << Z << "  A= " << theA[Z]
        << " XS(b)= " << cross/barn 
        << G4endl;
   }
   return cross;
 }

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G4double G4BGGPionElasticXS::GetIsoCrossSection	(	const G4DynamicParticle *	dp,
		G4int	Z,
		G4int	A,
		const G4Isotope *	iso = `0`,
		const G4Element *	elm = `0`,
		const G4Material *	mat = `0`
	)

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 146 of file G4BGGPionElasticXS.cc.

 {
   // this method should be called only for Z = 1
 
   G4double cross = 0.0;
   G4double ekin = dp->GetKineticEnergy();
 
   if(ekin <= fSAIDHighEnergyLimit) {
     cross = fSAID->GetElasticIsotopeCrossSection(particle, ekin, 1, 1);
   } else {
     fHadron->GetHadronNucleonXscPDG(dp, theProton);
     cross = theCoulombFac[1]*fHadron->GetElasticHadronNucleonXsc();
   } 
   cross *= A;
   /*
   if(ekin <= fLowEnergy) {
     cross = theCoulombFac[1];
 
   } else if( A < 2) {
     fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton());
     cross = fHadron->GetElasticHadronNucleonXsc();
   } else {
     fHadron->GetHadronNucleonXscNS(dp, G4Proton::Proton());
     cross = fHadron->GetElasticHadronNucleonXsc();
     fHadron->GetHadronNucleonXscNS(dp, G4Neutron::Neutron());
     cross += fHadron->GetElasticHadronNucleonXsc();
   }
   */
   if(verboseLevel > 1) {
     G4cout << "G4BGGPionElasticXS::GetIsoCrossSection  for "
        << dp->GetDefinition()->GetParticleName()
        << "  Ekin(GeV)= " << dp->GetKineticEnergy()
        << " in nucleus Z= " << Z << "  A= " << A
        << " XS(b)= " << cross/barn 
        << G4endl;
   }
   return cross;
 }

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G4bool G4BGGPionElasticXS::IsElementApplicable	(	const G4DynamicParticle *	,
		G4int	Z,
		const G4Material *
	)

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 94 of file G4BGGPionElasticXS.cc.

 {
   return true;
 }

G4bool G4BGGPionElasticXS::IsIsoApplicable	(	const G4DynamicParticle *	,
		G4int	Z,
		G4int	A,
		const G4Element *	elm = `0`,
		const G4Material *	mat = `0`
	)

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 102 of file G4BGGPionElasticXS.cc.

 {
   return (1 == Z && 2 >= A);
 }

The documentation for this class was generated from the following files:

geant4.10.03.p01/source/processes/hadronic/cross_sections/include/G4BGGPionElasticXS.hh
geant4.10.03.p01/source/processes/hadronic/cross_sections/src/G4BGGPionElasticXS.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation