G4BGGNucleonElasticXS Class Reference

#include <G4BGGNucleonElasticXS.hh>

Inheritance diagram for G4BGGNucleonElasticXS:

Collaboration diagram for G4BGGNucleonElasticXS:

Public Member Functions
	G4BGGNucleonElasticXS (const G4ParticleDefinition *)
virtual	~G4BGGNucleonElasticXS ()
virtual G4bool	IsElementApplicable (const G4DynamicParticle *, G4int Z, const G4Material *mat=0)
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
void	SetLowestCrossSection (G4double val)
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

Private Member Functions
G4double	CoulombFactor (G4double kinEnergy, G4int Z)
G4BGGNucleonElasticXS &	operator= (const G4BGGNucleonElasticXS &right)
	G4BGGNucleonElasticXS (const G4BGGNucleonElasticXS &)

Private Attributes
G4double	fGlauberEnergy
G4double	fPDGEnergy
G4double	fLowEnergy
G4double	fSAIDLowEnergyLimit
G4double	fSAIDHighEnergyLimit
G4double	fLowestXSection
G4double	theGlauberFac [93]
G4double	theCoulombFac [93]
G4int	theA [93]
const G4ParticleDefinition *	particle
const G4ParticleDefinition *	theProton
G4ComponentGGHadronNucleusXsc *	fGlauber
G4NucleonNuclearCrossSection *	fNucleon
G4HadronNucleonXsc *	fHadron
G4ComponentSAIDTotalXS *	fSAID
G4bool	isProton
G4bool	isInitialized

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 65 of file G4BGGNucleonElasticXS.hh.

Constructor & Destructor Documentation

G4BGGNucleonElasticXS() [1/2]

G4BGGNucleonElasticXS::G4BGGNucleonElasticXS

(

const G4ParticleDefinition *

p

)

Definition at line 60 of file G4BGGNucleonElasticXS.cc.

 : G4VCrossSectionDataSet("Barashenkov-Glauber") 
{
  verboseLevel = 0;
  fGlauberEnergy = 91.*GeV;
  fPDGEnergy = 5*GeV;
  fLowEnergy = 14.*MeV;
  fSAIDLowEnergyLimit = 1*MeV;
  fSAIDHighEnergyLimit = 1.3*GeV;
  fLowestXSection = millibarn;
  for (G4int i = 0; i < 93; ++i) {
    theGlauberFac[i] = 0.0;
    theCoulombFac[i] = 0.0;
    theA[i] = 1;
  }
  fNucleon = 0;
  fGlauber = 0;
  fHadron  = 0;
  fSAID    = 0;
  particle = p;
  theProton= G4Proton::Proton();
  isProton = false;
  isInitialized = false;
}

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~G4BGGNucleonElasticXS()

G4BGGNucleonElasticXS::~G4BGGNucleonElasticXS ( )

virtual

Definition at line 87 of file G4BGGNucleonElasticXS.cc.

{
  delete fSAID;
  delete fHadron;
  // The cross section registry will delete fNucleon
  delete fGlauber;
}

G4BGGNucleonElasticXS() [2/2]

G4BGGNucleonElasticXS::G4BGGNucleonElasticXS ( const G4BGGNucleonElasticXS &  )

private

Member Function Documentation

BuildPhysicsTable()

void G4BGGNucleonElasticXS::BuildPhysicsTable ( const G4ParticleDefinition &  p )

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 196 of file G4BGGNucleonElasticXS.cc.

{
  if(&p == theProton || &p == G4Neutron::Neutron()) {
    particle = &p;

  } else {
    G4cout << "### G4BGGNucleonElasticXS WARNING: is not applicable to " 
       << p.GetParticleName()
       << G4endl;
    throw G4HadronicException(__FILE__, __LINE__,
      "G4BGGNucleonElasticXS::BuildPhysicsTable is used for wrong particle");
    return;
  }

  if(isInitialized) { return; }
  isInitialized = true;

  fNucleon = (G4NucleonNuclearCrossSection*)G4CrossSectionDataSetRegistry::Instance()->GetCrossSectionDataSet(G4NucleonNuclearCrossSection::Default_Name());
  fGlauber = new G4ComponentGGHadronNucleusXsc();
  fHadron  = new G4HadronNucleonXsc();
  fSAID    = new G4ComponentSAIDTotalXS();

  fNucleon->BuildPhysicsTable(*particle);
  fGlauber->BuildPhysicsTable(*particle);

  if(particle == theProton) { 
    isProton = true; 
    fSAIDHighEnergyLimit = 3*GeV;
  }

  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 << "### G4BGGNucleonElasticXS::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 = fNucleon->GetElasticCrossSection(&dp, iz);

    theGlauberFac[iz] = csdn/csup;
    if(verboseLevel > 0) { 
      G4cout << "Z= " << iz <<  "  A= " << A 
         << " factor= " << theGlauberFac[iz] << G4endl;
    } 
  }

  theCoulombFac[0] = 
    fSAID->GetElasticIsotopeCrossSection(particle,fSAIDLowEnergyLimit,1,1)
    /CoulombFactor(fSAIDLowEnergyLimit, 1);

  dp.SetKineticEnergy(fPDGEnergy);
  fHadron->GetHadronNucleonXscPDG(&dp, theProton);
  theCoulombFac[1] = fHadron->GetElasticHadronNucleonXsc();

  if(verboseLevel > 0) {
    G4cout << "Z=1  A=1 " << " factor0= " << theCoulombFac[0] 
       << " factor1= " << theCoulombFac[1] 
       << G4endl; 
  }

  dp.SetKineticEnergy(fLowEnergy);
  for(G4int iz=2; iz<93; iz++) {
    theCoulombFac[iz] = 
      fNucleon->GetElasticCrossSection(&dp, iz)/CoulombFactor(fLowEnergy, iz);
    if(verboseLevel > 0) {
      G4cout << "Z= " << iz <<  "  A= " << theA[iz]
         << " factor= " << theCoulombFac[iz] << G4endl; 
    }
  }
}

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CoulombFactor()

G4double G4BGGNucleonElasticXS::CoulombFactor ( G4double  kinEnergy, G4int  Z  )

private

Definition at line 281 of file G4BGGNucleonElasticXS.cc.

{
  G4double res= 1.0;
  
  // from G4ProtonInelasticCrossSection
  if(isProton) {

    if (Z <= 1) { return kinEnergy*kinEnergy; }

    G4double elog = G4Log(kinEnergy/GeV)/llog10;
    G4double aa = theA[Z];

    G4double ff1 = 5.6  - 0.016*aa;    // slope of the drop at medium energies.
    G4double ff2 = 1.37 + 1.37/aa;     // start of the slope.
    G4double ff3 = 0.8  + 18./aa - 0.002*aa;   // stephight
    res = 1.0 + ff3*(1.0 - (1.0/(1+G4Exp(-ff1*(elog + ff2)))));

    ff1 = 8.   - 8./aa  - 0.008*aa; // slope of the rise
    ff2 = 2.34 - 5.4/aa - 0.0028*aa; // start of the rise
    res /= (1.0 + G4Exp(-ff1*(elog + ff2)));

  } 
  return res;  
}

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CrossSectionDescription()

void G4BGGNucleonElasticXS::CrossSectionDescription ( std::ostream &  outFile ) const

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 308 of file G4BGGNucleonElasticXS.cc.

{
  outFile << "The Barashenkov-Glauber-Gribov cross section handles elastic\n"
          << "scattering of protons and neutrons from nuclei using the\n"
          << "Barashenkov parameterization below 91 GeV and the Glauber-Gribov\n"
          << "parameterization above 91 GeV. n";
}

GetElementCrossSection()

G4double G4BGGNucleonElasticXS::GetElementCrossSection ( const G4DynamicParticle *  dp, G4int  Z, const G4Material *  mat = 0  )

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 117 of file G4BGGNucleonElasticXS.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]*CoulombFactor(ekin, Z);

    } else if(ekin > fGlauberEnergy) {
      cross = theGlauberFac[Z]*fGlauber->GetElasticGlauberGribov(dp, Z, theA[Z]);
    } else {
      cross = fNucleon->GetElasticCrossSection(dp, Z);
    }
  }

  if(verboseLevel > 1) {
    G4cout << "G4BGGNucleonElasticXS::GetElementCrossSection  for "
       << dp->GetDefinition()->GetParticleName()
       << "  Ekin(GeV)= " << dp->GetKineticEnergy()/CLHEP::GeV
       << " in nucleus Z= " << Z << "  A= " << theA[Z]
       << " XS(b)= " << cross/barn 
       << G4endl;
  }
  //AR-04Dec2013  if(cross <= fLowestXSection) { cross = 0.0; }
  return cross;
}

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GetIsoCrossSection()

G4double G4BGGNucleonElasticXS::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 155 of file G4BGGNucleonElasticXS.cc.

{
  // this method should be called only for Z = 1

  G4double cross = 0.0;
  G4double ekin = dp->GetKineticEnergy();

  if(ekin <= fSAIDLowEnergyLimit) {
    cross = theCoulombFac[0]*CoulombFactor(ekin, 1);
  } else if(ekin <= fSAIDHighEnergyLimit) {
    cross = fSAID->GetElasticIsotopeCrossSection(particle, ekin, 1, 1);
  } else if(ekin <= fPDGEnergy) {
    G4double cross1 = 
      fSAID->GetElasticIsotopeCrossSection(particle, fPDGEnergy, 1, 1);
    G4double cross2 = theCoulombFac[1]; 
    cross = cross1 + (cross2 - cross1)*(ekin - fSAIDHighEnergyLimit)
      /(fPDGEnergy - fSAIDHighEnergyLimit);
  } else {
    fHadron->GetHadronNucleonXscPDG(dp, theProton);
    cross = fHadron->GetElasticHadronNucleonXsc();
  } 
  cross *= A;

  if(verboseLevel > 1) {
    G4cout << "G4BGGNucleonElasticXS::GetIsoCrossSection  for "
       << dp->GetDefinition()->GetParticleName()
       << "  Ekin(GeV)= " << dp->GetKineticEnergy()/CLHEP::GeV
       << " in nucleus Z= " << Z << "  A= " << A
       << " XS(b)= " << cross/barn 
       << G4endl;
  }
  //AR-04Dec2013  if(cross <= fLowestXSection) { cross = 0.0; }
  return cross;
}

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IsElementApplicable()

G4bool G4BGGNucleonElasticXS::IsElementApplicable ( const G4DynamicParticle *  , G4int  Z, const G4Material *  mat = 0  )

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 98 of file G4BGGNucleonElasticXS.cc.

{
  return true;
}

IsIsoApplicable()

G4bool G4BGGNucleonElasticXS::IsIsoApplicable ( const G4DynamicParticle *  , G4int  Z, G4int  A, const G4Element *  elm = 0, const G4Material *  mat = 0  )

virtual

Reimplemented from G4VCrossSectionDataSet.

Definition at line 106 of file G4BGGNucleonElasticXS.cc.

{
  return (1 == Z);
}

operator=()

G4BGGNucleonElasticXS& G4BGGNucleonElasticXS::operator= ( const G4BGGNucleonElasticXS &  right )

private

SetLowestCrossSection()

void G4BGGNucleonElasticXS::SetLowestCrossSection ( G4double  val )

inline

Definition at line 126 of file G4BGGNucleonElasticXS.hh.

{
  fLowestXSection = val;
}

Member Data Documentation

fGlauber

G4ComponentGGHadronNucleusXsc* G4BGGNucleonElasticXS::fGlauber

private

Definition at line 118 of file G4BGGNucleonElasticXS.hh.

fGlauberEnergy

G4double G4BGGNucleonElasticXS::fGlauberEnergy

private

Definition at line 106 of file G4BGGNucleonElasticXS.hh.

fHadron

G4HadronNucleonXsc* G4BGGNucleonElasticXS::fHadron

private

Definition at line 120 of file G4BGGNucleonElasticXS.hh.

fLowEnergy

G4double G4BGGNucleonElasticXS::fLowEnergy

private

Definition at line 108 of file G4BGGNucleonElasticXS.hh.

fLowestXSection

G4double G4BGGNucleonElasticXS::fLowestXSection

private

Definition at line 111 of file G4BGGNucleonElasticXS.hh.

fNucleon

G4NucleonNuclearCrossSection* G4BGGNucleonElasticXS::fNucleon

private

Definition at line 119 of file G4BGGNucleonElasticXS.hh.

fPDGEnergy

G4double G4BGGNucleonElasticXS::fPDGEnergy

private

Definition at line 107 of file G4BGGNucleonElasticXS.hh.

fSAID

G4ComponentSAIDTotalXS* G4BGGNucleonElasticXS::fSAID

private

Definition at line 121 of file G4BGGNucleonElasticXS.hh.

fSAIDHighEnergyLimit

G4double G4BGGNucleonElasticXS::fSAIDHighEnergyLimit

private

Definition at line 110 of file G4BGGNucleonElasticXS.hh.

fSAIDLowEnergyLimit

G4double G4BGGNucleonElasticXS::fSAIDLowEnergyLimit

private

Definition at line 109 of file G4BGGNucleonElasticXS.hh.

isInitialized

G4bool G4BGGNucleonElasticXS::isInitialized

private

Definition at line 123 of file G4BGGNucleonElasticXS.hh.

isProton

G4bool G4BGGNucleonElasticXS::isProton

private

Definition at line 122 of file G4BGGNucleonElasticXS.hh.

particle

const G4ParticleDefinition* G4BGGNucleonElasticXS::particle

private

Definition at line 116 of file G4BGGNucleonElasticXS.hh.

theA

G4int G4BGGNucleonElasticXS::theA[93]

private

Definition at line 114 of file G4BGGNucleonElasticXS.hh.

theCoulombFac

G4double G4BGGNucleonElasticXS::theCoulombFac[93]

private

Definition at line 113 of file G4BGGNucleonElasticXS.hh.

theGlauberFac

G4double G4BGGNucleonElasticXS::theGlauberFac[93]

private

Definition at line 112 of file G4BGGNucleonElasticXS.hh.

theProton

const G4ParticleDefinition* G4BGGNucleonElasticXS::theProton

private

Definition at line 117 of file G4BGGNucleonElasticXS.hh.

---

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

• G4BGGNucleonElasticXS.hh
• G4BGGNucleonElasticXS.cc