#include <G4HadronElastic.hh>

Inheritance diagram for G4HadronElastic:

Collaboration diagram for G4HadronElastic:

Public Member Functions
	G4HadronElastic (const G4String &name="hElasticLHEP")

virtual	~G4HadronElastic ()

virtual G4HadFinalState *	ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus)

virtual G4double	SampleInvariantT (const G4ParticleDefinition *p, G4double plab, G4int Z, G4int A)

void	SetLowestEnergyLimit (G4double value)

G4double	LowestEnergyLimit () const

G4double	ComputeMomentumCMS (const G4ParticleDefinition *p, G4double plab, G4int Z, G4int A)

virtual void	ModelDescription (std::ostream &) const

Public Member Functions inherited from G4HadronicInteraction
	G4HadronicInteraction (const G4String &modelName="HadronicModel")

virtual	~G4HadronicInteraction ()

virtual G4bool	IsApplicable (const G4HadProjectile &, G4Nucleus &)

G4double	GetMinEnergy () const

G4double	GetMinEnergy (const G4Material aMaterial, const G4Element anElement) const

void	SetMinEnergy (G4double anEnergy)

void	SetMinEnergy (G4double anEnergy, const G4Element *anElement)

void	SetMinEnergy (G4double anEnergy, const G4Material *aMaterial)

G4double	GetMaxEnergy () const

G4double	GetMaxEnergy (const G4Material aMaterial, const G4Element anElement) const

void	SetMaxEnergy (const G4double anEnergy)

void	SetMaxEnergy (G4double anEnergy, const G4Element *anElement)

void	SetMaxEnergy (G4double anEnergy, const G4Material *aMaterial)

const G4HadronicInteraction *	GetMyPointer () const

virtual G4int	GetVerboseLevel () const

virtual void	SetVerboseLevel (G4int value)

const G4String &	GetModelName () const

void	DeActivateFor (const G4Material *aMaterial)

void	ActivateFor (const G4Material *aMaterial)

void	DeActivateFor (const G4Element *anElement)

void	ActivateFor (const G4Element *anElement)

G4bool	IsBlocked (const G4Material *aMaterial) const

G4bool	IsBlocked (const G4Element *anElement) const

void	SetRecoilEnergyThreshold (G4double val)

G4double	GetRecoilEnergyThreshold () const

G4bool	operator== (const G4HadronicInteraction &right) const

G4bool	operator!= (const G4HadronicInteraction &right) const

virtual const std::pair< G4double, G4double >	GetFatalEnergyCheckLevels () const

virtual std::pair< G4double, G4double >	GetEnergyMomentumCheckLevels () const

void	SetEnergyMomentumCheckLevels (G4double relativeLevel, G4double absoluteLevel)

virtual void	BuildPhysicsTable (const G4ParticleDefinition &)

Private Attributes
G4ParticleDefinition *	theProton

G4ParticleDefinition *	theNeutron

G4ParticleDefinition *	theDeuteron

G4ParticleDefinition *	theAlpha

G4double	lowestEnergyLimit

Additional Inherited Members
Protected Member Functions inherited from G4HadronicInteraction
void	SetModelName (const G4String &nam)

G4bool	IsBlocked () const

void	Block ()

Protected Attributes inherited from G4HadronicInteraction
G4HadFinalState	theParticleChange

G4int	verboseLevel

G4double	theMinEnergy

G4double	theMaxEnergy

G4bool	isBlocked

Detailed Description

Definition at line 50 of file G4HadronElastic.hh.

Constructor & Destructor Documentation

◆ G4HadronElastic()

G4HadronElastic::G4HadronElastic ( const G4String & name = "hElasticLHEP" )

Definition at line 48 of file G4HadronElastic.cc.

   : G4HadronicInteraction(name)
 {
   SetMinEnergy( 0.0*GeV );
   SetMaxEnergy( 100.*TeV );
   lowestEnergyLimit= 1.e-6*eV;  
 
   theProton   = G4Proton::Proton();
   theNeutron  = G4Neutron::Neutron();
   theDeuteron = G4Deuteron::Deuteron();
   theAlpha    = G4Alpha::Alpha();
   //Description();
 }

Here is the call graph for this function:

◆ ~G4HadronElastic()

G4HadronElastic::~G4HadronElastic ( )

virtual

Definition at line 63 of file G4HadronElastic.cc.

64 {}

Member Function Documentation

◆ ApplyYourself()

G4HadFinalState * G4HadronElastic::ApplyYourself	(	const G4HadProjectile &	aTrack,
		G4Nucleus &	targetNucleus
	)

virtual

Implements G4HadronicInteraction.

Reimplemented in G4LEnp, G4LEHadronProtonElastic, and G4LEpp.

Definition at line 80 of file G4HadronElastic.cc.

 {
   theParticleChange.Clear();
 
   const G4HadProjectile* aParticle = &aTrack;
   G4double ekin = aParticle->GetKineticEnergy();
   if(ekin <= lowestEnergyLimit) {
     theParticleChange.SetEnergyChange(ekin);
     theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
     return &theParticleChange;
   }
 
   G4int A = targetNucleus.GetA_asInt();
   G4int Z = targetNucleus.GetZ_asInt();
 
   G4double plab = aParticle->GetTotalMomentum();
 
   // Scattered particle referred to axis of incident particle
   const G4ParticleDefinition* theParticle = aParticle->GetDefinition();
   G4double m1 = theParticle->GetPDGMass();
 
   if (verboseLevel>1) {
     G4cout << "G4HadronElastic: " 
        << aParticle->GetDefinition()->GetParticleName() 
        << " Plab(GeV/c)= " << plab/GeV  
        << " Ekin(MeV) = " << ekin/MeV 
        << " scattered off Z= " << Z 
        << " A= " << A 
        << G4endl;
   }
 
   G4double mass2 = G4NucleiProperties::GetNuclearMass(A, Z);
   G4LorentzVector lv1 = aParticle->Get4Momentum();
   G4LorentzVector lv(0.0,0.0,0.0,mass2);   
   lv += lv1;
 
   G4ThreeVector bst = lv.boostVector();
   lv1.boost(-bst);
 
   G4ThreeVector p1 = lv1.vect();
   G4double momentumCMS = p1.mag();
   G4double tmax = 4.0*momentumCMS*momentumCMS;
 
   // Sampling in CM system
   G4double t    = SampleInvariantT(theParticle, plab, Z, A);
   G4double phi  = G4UniformRand()*CLHEP::twopi;
   G4double cost = 1. - 2.0*t/tmax;
   G4double sint;
 
   // problem in sampling
   if(cost > 1.0 || cost < -1.0) {
     //if(verboseLevel > 0) {
       G4cout << "G4HadronElastic WARNING (1 - cost)= " << 1 - cost
          << " after scattering of " 
          << aParticle->GetDefinition()->GetParticleName()
          << " p(GeV/c)= " << plab/GeV
          << " on an ion Z= " << Z << " A= " << A
          << G4endl;
       //}
     cost = 1.0;
     sint = 0.0;
 
     // normal situation
   } else  {
     sint = std::sqrt((1.0-cost)*(1.0+cost));
   }    
   if (verboseLevel>1) {
     G4cout << " t= " << t << " tmax(GeV^2)= " << tmax/(GeV*GeV) 
        << " Pcms(GeV)= " << momentumCMS/GeV << " cos(t)=" << cost 
        << " sin(t)=" << sint << G4endl;
   }
   G4ThreeVector v1(sint*std::cos(phi),sint*std::sin(phi),cost);
   v1 *= momentumCMS;
   G4LorentzVector nlv1(v1.x(),v1.y(),v1.z(),
                std::sqrt(momentumCMS*momentumCMS + m1*m1));
 
   nlv1.boost(bst); 
 
   G4double eFinal = nlv1.e() - m1;
   if (verboseLevel > 1) {
     G4cout <<" m= " << m1 << " Efin(MeV)= " << eFinal 
        << " Proj: 4-mom " << lv1 << " Final: " << nlv1 
        << G4endl;
   }
   if(eFinal <= lowestEnergyLimit) {
     if(eFinal < 0.0 && verboseLevel > 0) {
       G4cout << "G4HadronElastic WARNING Efinal= " << eFinal
          << " after scattering of " 
          << aParticle->GetDefinition()->GetParticleName()
          << " p(GeV/c)= " << plab/GeV
          << " on an ion Z= " << Z << " A= " << A
          << G4endl;
     }
     theParticleChange.SetEnergyChange(0.0);
     nlv1 = G4LorentzVector(0.0,0.0,0.0,m1);
 
   } else {
     theParticleChange.SetMomentumChange(nlv1.vect().unit());
     theParticleChange.SetEnergyChange(eFinal);
   }  
 
   lv -= nlv1;
   G4double erec =  lv.e() - mass2;
   if (verboseLevel > 1) {
     G4cout << "Recoil: " <<" m= " << mass2 << " Erec(MeV)= " << erec
        << " 4-mom: " << lv 
        << G4endl;
   }
  
   if(erec > GetRecoilEnergyThreshold()) {
     G4ParticleDefinition * theDef = 0;
     if(Z == 1 && A == 1)       { theDef = theProton; }
     else if (Z == 1 && A == 2) { theDef = theDeuteron; }
     else if (Z == 1 && A == 3) { theDef = G4Triton::Triton(); }
     else if (Z == 2 && A == 3) { theDef = G4He3::He3(); }
     else if (Z == 2 && A == 4) { theDef = theAlpha; }
     else {
       theDef = 
     G4ParticleTable::GetParticleTable()->GetIonTable()->GetIon(Z,A,0.0);
     }
     G4DynamicParticle * aSec = new G4DynamicParticle(theDef, lv);
     theParticleChange.AddSecondary(aSec);
   } else if(erec > 0.0) {
     theParticleChange.SetLocalEnergyDeposit(erec);
   }
 
   return &theParticleChange;
 }

Here is the call graph for this function:

◆ ComputeMomentumCMS()

G4double G4HadronElastic::ComputeMomentumCMS	(	const G4ParticleDefinition *	p,
		G4double	plab,
		G4int	Z,
		G4int	A
	)

inline

Definition at line 98 of file G4HadronElastic.hh.

 {
   G4double m1 = p->GetPDGMass();
   G4double m12= m1*m1;
   G4double mass2 = G4NucleiProperties::GetNuclearMass(A, Z);
   return plab*mass2/std::sqrt(m12 + mass2*mass2 + 2.*mass2*std::sqrt(m12 + plab*plab));
 }

Here is the call graph for this function:

Here is the caller graph for this function:

◆ LowestEnergyLimit()

G4double G4HadronElastic::LowestEnergyLimit ( ) const

inline

Definition at line 92 of file G4HadronElastic.hh.

 {
   return lowestEnergyLimit;
 }

◆ ModelDescription()

void G4HadronElastic::ModelDescription ( std::ostream & outFile ) const

virtual

Reimplemented from G4HadronicInteraction.

Reimplemented in G4ChipsElasticModel.

Definition at line 67 of file G4HadronElastic.cc.

 {
 
     outFile << "G4HadronElastic is a hadron-nucleus elastic scattering\n"
             << "model which uses the Gheisha two-exponential momentum\n"
             << "transfer parameterization.  The model is fully relativistic\n"
             << "as opposed to the original Gheisha model which was not.\n"
             << "This model may be used for all long-lived hadrons at all\n"
             << "incident energies.\n";
 
 }

◆ SampleInvariantT()

G4double G4HadronElastic::SampleInvariantT	(	const G4ParticleDefinition *	p,
		G4double	plab,
		G4int	Z,
		G4int	A
	)

virtual

Reimplemented from G4HadronicInteraction.

Reimplemented in G4hhElastic, G4DiffuseElastic, G4NuclNuclDiffuseElastic, G4LEnp, G4LEHadronProtonElastic, G4LEpp, G4ChipsElasticModel, and G4AntiNuclElastic.

Definition at line 212 of file G4HadronElastic.cc.

 {
   static const G4double GeV2 = GeV*GeV;
   G4double momentumCMS = ComputeMomentumCMS(p,plab,Z,A);
   G4double tmax = 4.0*momentumCMS*momentumCMS/GeV2;
   G4double aa, bb, cc;
   G4double dd = 10.;
   G4Pow* g4pow = G4Pow::GetInstance();
   if (A <= 62) {
     bb = 14.5*g4pow->Z23(A);
     aa = g4pow->powZ(A, 1.63)/bb;
     cc = 1.4*g4pow->Z13(A)/dd;
   } else {
     bb = 60.*g4pow->Z13(A);
     aa = g4pow->powZ(A, 1.33)/bb;
     cc = 0.4*g4pow->powZ(A, 0.4)/dd;
   }
   G4double q1 = 1.0 - G4Exp(-bb*tmax);
   G4double q2 = 1.0 - G4Exp(-dd*tmax);
   G4double s1 = q1*aa;
   G4double s2 = q2*cc;
   if((s1 + s2)*G4UniformRand() < s2) {
     q1 = q2;
     bb = dd;
   }
   return -GeV2*G4Log(1.0 - G4UniformRand()*q1)/bb;
 }

Here is the call graph for this function:

Here is the caller graph for this function:

◆ SetLowestEnergyLimit()

void G4HadronElastic::SetLowestEnergyLimit ( G4double value )

inline

Definition at line 87 of file G4HadronElastic.hh.

 {
   lowestEnergyLimit = value;
 }

Member Data Documentation

◆ lowestEnergyLimit

G4double G4HadronElastic::lowestEnergyLimit

private

Definition at line 83 of file G4HadronElastic.hh.

◆ theAlpha

G4ParticleDefinition* G4HadronElastic::theAlpha

private

Definition at line 81 of file G4HadronElastic.hh.

◆ theDeuteron

G4ParticleDefinition* G4HadronElastic::theDeuteron

private

Definition at line 80 of file G4HadronElastic.hh.

◆ theNeutron

G4ParticleDefinition* G4HadronElastic::theNeutron

private

Definition at line 79 of file G4HadronElastic.hh.

◆ theProton

G4ParticleDefinition* G4HadronElastic::theProton

private

Definition at line 78 of file G4HadronElastic.hh.

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

Public Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ G4HadronElastic()

◆ ~G4HadronElastic()

Member Function Documentation

◆ ApplyYourself()

◆ ComputeMomentumCMS()

◆ LowestEnergyLimit()

◆ ModelDescription()

◆ SampleInvariantT()

◆ SetLowestEnergyLimit()

Member Data Documentation

◆ lowestEnergyLimit

◆ theAlpha

◆ theDeuteron

◆ theNeutron

◆ theProton