#include <G4RPGNeutronInelastic.hh>

Inheritance diagram for G4RPGNeutronInelastic:

Collaboration diagram for G4RPGNeutronInelastic:

Public Member Functions
	G4RPGNeutronInelastic ()

	~G4RPGNeutronInelastic ()

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

Public Member Functions inherited from G4RPGNucleonInelastic
	G4RPGNucleonInelastic (const G4String &modelName="RPGNucleonInelastic")

	~G4RPGNucleonInelastic ()

Public Member Functions inherited from G4RPGInelastic
	G4RPGInelastic (const G4String &modelName="RPGInelastic")

virtual	~G4RPGInelastic ()

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

virtual	~G4HadronicInteraction ()

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

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	ModelDescription (std::ostream &outFile) const

virtual void	BuildPhysicsTable (const G4ParticleDefinition &)

Private Member Functions
void	InitialCollision (G4FastVector< G4ReactionProduct, 256 > &vec, G4int &vecLen, G4ReactionProduct &currentParticle, G4ReactionProduct &targetParticle, G4bool &incidentHasChanged, G4bool &targetHasChanged)

void	SlowNeutron (const G4HadProjectile *originalIncident, G4ReactionProduct &modifiedOriginal, G4ReactionProduct &targetParticle, G4Nucleus &targetNucleus)

Additional Inherited Members
Protected Types inherited from G4RPGInelastic
enum	{ pi0, pip, pim, kp, km, k0, k0b, pro, neu, lam, sp, s0, sm, xi0, xim, om, ap, an }

Protected Member Functions inherited from G4RPGNucleonInelastic
G4int	GetMultiplicityT1 (G4double KE) const

G4int	GetMultiplicityT0 (G4double KE) const

std::vector< G4int >	GetFSPartTypesForT1 (G4int mult, G4double KE, G4int tindex) const

std::vector< G4int >	GetFSPartTypesForT0 (G4int mult, G4double KE) const

std::vector< G4int >	GetFSPartTypesForPP (G4int mult, G4double KE) const

std::vector< G4int >	GetFSPartTypesForNN (G4int mult, G4double KE) const

std::vector< G4int >	GetFSPartTypesForPN (G4int mult, G4double KE) const

std::vector< G4int >	GetFSPartTypesForNP (G4int mult, G4double KE) const

Protected Member Functions inherited from G4RPGInelastic
G4double	Pmltpc (G4int np, G4int nm, G4int nz, G4int n, G4double b, G4double c)

G4int	Factorial (G4int n)

G4bool	MarkLeadingStrangeParticle (const G4ReactionProduct &currentParticle, const G4ReactionProduct &targetParticle, G4ReactionProduct &leadParticle)

void	SetUpPions (const G4int np, const G4int nm, const G4int nz, G4FastVector< G4ReactionProduct, 256 > &vec, G4int &vecLen)

void	GetNormalizationConstant (const G4double availableEnergy, G4double &n, G4double &anpn)

void	CalculateMomenta (G4FastVector< G4ReactionProduct, 256 > &vec, G4int &vecLen, const G4HadProjectile originalIncident, const G4DynamicParticle originalTarget, G4ReactionProduct &modifiedOriginal, G4Nucleus &targetNucleus, G4ReactionProduct &currentParticle, G4ReactionProduct &targetParticle, G4bool &incidentHasChanged, G4bool &targetHasChanged, G4bool quasiElastic)

void	SetUpChange (G4FastVector< G4ReactionProduct, 256 > &vec, G4int &vecLen, G4ReactionProduct &currentParticle, G4ReactionProduct &targetParticle, G4bool &incidentHasChanged)

std::pair< G4int, G4double >	interpolateEnergy (G4double ke) const

G4int	sampleFlat (std::vector< G4double > sigma) const

void	CheckQnums (G4FastVector< G4ReactionProduct, 256 > &vec, G4int &vecLen, G4ReactionProduct &currentParticle, G4ReactionProduct &targetParticle, G4double Q, G4double B, G4double S)

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

G4bool	IsBlocked () const

void	Block ()

Protected Attributes inherited from G4RPGInelastic
G4RPGFragmentation	fragmentation

G4RPGTwoCluster	twoCluster

G4RPGPionSuppression	pionSuppression

G4RPGStrangeProduction	strangeProduction

G4RPGTwoBody	twoBody

G4ParticleDefinition *	particleDef [18]

Protected Attributes inherited from G4HadronicInteraction
G4HadFinalState	theParticleChange

G4int	verboseLevel

G4double	theMinEnergy

G4double	theMaxEnergy

G4bool	isBlocked

Static Protected Attributes inherited from G4RPGNucleonInelastic
static const G4int	pPindex [8][2]

static const G4int	pNindex [8][2]

static const G4int	T1_2bfs [2][1][2]

static const G4int	T1_3bfs [2][6][3]

static const G4int	T1_4bfs [2][18][4]

static const G4int	T1_5bfs [2][32][5]

static const G4int	T1_6bfs [2][7][6]

static const G4int	T1_7bfs [2][8][7]

static const G4int	T1_8bfs [2][10][8]

static const G4int	T1_9bfs [2][11][9]

static const G4int	T0_2bfs [1][2]

static const G4int	T0_3bfs [9][3]

static const G4int	T0_4bfs [22][4]

static const G4int	T0_5bfs [38][5]

static const G4int	T0_6bfs [7][6]

static const G4int	T0_7bfs [9][7]

static const G4int	T0_8bfs [10][8]

static const G4int	T0_9bfs [12][9]

static G4ThreadLocal G4double	pPtot [30]

static G4ThreadLocal G4double	pNtot [30]

static G4ThreadLocal G4double	t1_dSigma_dMult [8][30]

static G4ThreadLocal G4double	t0_dSigma_dMult [8][30]

static const G4float	pPCrossSections [93][30]

static const G4float	pNCrossSections [108][30]

Detailed Description

Definition at line 43 of file G4RPGNeutronInelastic.hh.

Constructor & Destructor Documentation

◆ G4RPGNeutronInelastic()

G4RPGNeutronInelastic::G4RPGNeutronInelastic ( )

inline

Definition at line 47 of file G4RPGNeutronInelastic.hh.

47 : G4RPGNucleonInelastic("RPGNeutronInelastic")

48 {}

G4RPGNucleonInelastic::G4RPGNucleonInelastic

G4RPGNucleonInelastic(const G4String &modelName="RPGNucleonInelastic")

Definition: G4RPGNucleonInelastic.cc:33

◆ ~G4RPGNeutronInelastic()

G4RPGNeutronInelastic::~G4RPGNeutronInelastic ( )

inline

Definition at line 50 of file G4RPGNeutronInelastic.hh.

51 {}

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Member Function Documentation

◆ ApplyYourself()

G4HadFinalState * G4RPGNeutronInelastic::ApplyYourself	(	const G4HadProjectile &	aTrack,
		G4Nucleus &	targetNucleus
	)

virtual

Implements G4HadronicInteraction.

Definition at line 35 of file G4RPGNeutronInelastic.cc.

 {
   theParticleChange.Clear();
   const G4HadProjectile* originalIncident = &aTrack;
 
   // create the target particle
   G4DynamicParticle* originalTarget = targetNucleus.ReturnTargetParticle();
   
   G4ReactionProduct modifiedOriginal;
   modifiedOriginal = *originalIncident;
   G4ReactionProduct targetParticle;
   targetParticle = *originalTarget;
   if( originalIncident->GetKineticEnergy()/GeV < 0.01 + 2.*G4UniformRand()/9. )
   {
     SlowNeutron(originalIncident,modifiedOriginal,targetParticle,targetNucleus );
     delete originalTarget;
     return &theParticleChange;
   }
 
   // Fermi motion and evaporation
   // As of Geant3, the Fermi energy calculation had not been Done
   G4double ek = originalIncident->GetKineticEnergy()/MeV;
   G4double amas = originalIncident->GetDefinition()->GetPDGMass()/MeV;
     
   G4double tkin = targetNucleus.Cinema( ek );
   ek += tkin;
   modifiedOriginal.SetKineticEnergy( ek*MeV );
   G4double et = ek + amas;
   G4double p = std::sqrt( std::abs((et-amas)*(et+amas)) );
   G4double pp = modifiedOriginal.GetMomentum().mag()/MeV;
   if( pp > 0.0 )
   {
     G4ThreeVector momentum = modifiedOriginal.GetMomentum();
     modifiedOriginal.SetMomentum( momentum * (p/pp) );
   }
   //
   // calculate black track energies
   //
   tkin = targetNucleus.EvaporationEffects( ek );
   ek -= tkin;
   modifiedOriginal.SetKineticEnergy(ek);
   et = ek + amas;
   p = std::sqrt( std::abs((et-amas)*(et+amas)) );
   pp = modifiedOriginal.GetMomentum().mag();
   if( pp > 0.0 )
   {
     G4ThreeVector momentum = modifiedOriginal.GetMomentum();
     modifiedOriginal.SetMomentum( momentum * (p/pp) );
   }
   const G4double cutOff = 0.1;
   if( modifiedOriginal.GetKineticEnergy()/MeV <= cutOff )
   {
     SlowNeutron( originalIncident, modifiedOriginal, targetParticle, targetNucleus );
     delete originalTarget;
     return &theParticleChange;
   }
 
   G4ReactionProduct currentParticle = modifiedOriginal;
   currentParticle.SetSide( 1 ); // incident always goes in forward hemisphere
   targetParticle.SetSide( -1 );  // target always goes in backward hemisphere
   G4bool incidentHasChanged = false;
   G4bool targetHasChanged = false;
   G4bool quasiElastic = false;
   G4FastVector<G4ReactionProduct,256> vec;  // vec will contain sec. particles
   G4int vecLen = 0;
   vec.Initialize( 0 );
     
   InitialCollision(vec, vecLen, currentParticle, targetParticle,
                    incidentHasChanged, targetHasChanged);
     
   CalculateMomenta(vec, vecLen,
                    originalIncident, originalTarget, modifiedOriginal,
                    targetNucleus, currentParticle, targetParticle,
                    incidentHasChanged, targetHasChanged, quasiElastic);
     
   SetUpChange(vec, vecLen,
               currentParticle, targetParticle,
               incidentHasChanged);
     
   delete originalTarget;
   return &theParticleChange;
 }

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◆ InitialCollision()

void G4RPGNeutronInelastic::InitialCollision	(	G4FastVector< G4ReactionProduct, 256 > &	vec,
		G4int &	vecLen,
		G4ReactionProduct &	currentParticle,
		G4ReactionProduct &	targetParticle,
		G4bool &	incidentHasChanged,
		G4bool &	targetHasChanged
	)

private

Definition at line 243 of file G4RPGNeutronInelastic.cc.

 {
   G4double KE = currentParticle.GetKineticEnergy()/GeV;
  
   G4int mult;
   G4int partType;
   std::vector<G4int> fsTypes;
   G4int part1;
   G4int part2;
  
   G4double testCharge;
   G4double testBaryon;
   G4double testStrange;
   
   // Get particle types according to incident and target types
 
   if (targetParticle.GetDefinition() == particleDef[neu]) {
     mult = GetMultiplicityT1(KE);
     fsTypes = GetFSPartTypesForNN(mult, KE);
 
     part1 = fsTypes[0];
     part2 = fsTypes[1];
     currentParticle.SetDefinition(particleDef[part1]);
     targetParticle.SetDefinition(particleDef[part2]);
     if (part1 == pro) {      
       if (part2 == neu) {
         if (G4UniformRand() > 0.5) {
           incidentHasChanged = true;
     } else {
           targetHasChanged = true;
           currentParticle.SetDefinition(particleDef[part2]);
           targetParticle.SetDefinition(particleDef[part1]);
     }
       } else {
         targetHasChanged = true;
         incidentHasChanged = true;
       }
 
     } else { // neutron
       if (part2 > neu && part2 < xi0) targetHasChanged = true;
     }
 
     testCharge = 0.0;
     testBaryon = 2.0;
     testStrange = 0.0;
 
   } else { // target was a proton
     mult = GetMultiplicityT0(KE);
     fsTypes = GetFSPartTypesForNP(mult, KE);
  
     part1 = fsTypes[0];
     part2 = fsTypes[1];
     currentParticle.SetDefinition(particleDef[part1]);
     targetParticle.SetDefinition(particleDef[part2]);
     if (part1 == pro) {
       if (part2 == pro) {
         incidentHasChanged = true;
       } else if (part2 == neu) {
         if (G4UniformRand() > 0.5) {
           incidentHasChanged = true;
           targetHasChanged = true;
     } else {
           currentParticle.SetDefinition(particleDef[part2]);
           targetParticle.SetDefinition(particleDef[part1]);
     }
         
       } else if (part2 > neu && part2 < xi0) {
         incidentHasChanged = true;
         targetHasChanged = true;
       }
 
     } else { // neutron
       targetHasChanged = true;
     }
 
     testCharge = 1.0;
     testBaryon = 2.0;
     testStrange = 0.0;
   }
 
   //  if (mult == 2 && !incidentHasChanged && !targetHasChanged)
   //                                              quasiElastic = true;
   
   // Remove incident and target from fsTypes
   
   fsTypes.erase(fsTypes.begin());
   fsTypes.erase(fsTypes.begin());
 
   // Remaining particles are secondaries.  Put them into vec.
   
   G4ReactionProduct* rp(0);
   for(G4int i=0; i < mult-2; ++i ) {
     partType = fsTypes[i];
     rp = new G4ReactionProduct();
     rp->SetDefinition(particleDef[partType]);
     (G4UniformRand() < 0.5) ? rp->SetSide(-1) : rp->SetSide(1);
     vec.SetElement(vecLen++, rp);
   }
 
   // Check conservation of charge, strangeness, baryon number
   
   CheckQnums(vec, vecLen, currentParticle, targetParticle,
              testCharge, testBaryon, testStrange);
   
   return;
 }

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◆ SlowNeutron()

void G4RPGNeutronInelastic::SlowNeutron	(	const G4HadProjectile *	originalIncident,
		G4ReactionProduct &	modifiedOriginal,
		G4ReactionProduct &	targetParticle,
		G4Nucleus &	targetNucleus
	)

private

Definition at line 120 of file G4RPGNeutronInelastic.cc.

 {        
   const G4double A = targetNucleus.GetA_asInt();    // atomic weight
   const G4double Z = targetNucleus.GetZ_asInt();    // atomic number
     
   G4double currentKinetic = modifiedOriginal.GetKineticEnergy()/MeV;
   G4double currentMass = modifiedOriginal.GetMass()/MeV;
   if( A < 1.5 )   // Hydrogen
   {
     //
     // very simple simulation of scattering angle and energy
     // nonrelativistic approximation with isotropic angular
     // distribution in the cms system 
     //
     G4double cost1, eka = 0.0;
     while (eka <= 0.0) {  /* Loop checking, 01.09.2015, D.Wright */
       cost1 = -1.0 + 2.0*G4UniformRand();
       eka = 1.0 + 2.0*cost1*A + A*A;
     }
     G4double cost = std::min( 1.0, std::max( -1.0, (A*cost1+1.0)/std::sqrt(eka) ) );
     eka /= (1.0+A)*(1.0+A);
     G4double ek = currentKinetic*MeV/GeV;
     G4double amas = currentMass*MeV/GeV;
     ek *= eka;
     G4double en = ek + amas;
     G4double p = std::sqrt(std::abs(en*en-amas*amas));
     G4double sint = std::sqrt(std::abs(1.0-cost*cost));
     G4double phi = G4UniformRand()*twopi;
     G4double px = sint*std::sin(phi);
     G4double py = sint*std::cos(phi);
     G4double pz = cost;
     targetParticle.SetMomentum( px*GeV, py*GeV, pz*GeV );
     G4double pxO = originalIncident->Get4Momentum().x()/GeV;
     G4double pyO = originalIncident->Get4Momentum().y()/GeV;
     G4double pzO = originalIncident->Get4Momentum().z()/GeV;
     G4double ptO = pxO*pxO + pyO+pyO;
     if( ptO > 0.0 )
     {
       G4double pO = std::sqrt(pxO*pxO+pyO*pyO+pzO*pzO);
       cost = pzO/pO;
       sint = 0.5*(std::sqrt(std::abs((1.0-cost)*(1.0+cost)))+std::sqrt(ptO)/pO);
       G4double ph = pi/2.0;
       if( pyO < 0.0 )ph = ph*1.5;
       if( std::abs(pxO) > 0.000001 )ph = std::atan2(pyO,pxO);
       G4double cosp = std::cos(ph);
       G4double sinp = std::sin(ph);
       px = cost*cosp*px - sinp*py+sint*cosp*pz;
       py = cost*sinp*px + cosp*py+sint*sinp*pz;
       pz = -sint*px     + cost*pz;
     }
     else
     {
       if( pz < 0.0 )pz *= -1.0;
     }
     G4double pu = std::sqrt(px*px+py*py+pz*pz);
     modifiedOriginal.SetMomentum( targetParticle.GetMomentum() * (p/pu) );
     modifiedOriginal.SetKineticEnergy( ek*GeV );
       
     targetParticle.SetMomentum(
      originalIncident->Get4Momentum().vect() - modifiedOriginal.GetMomentum() );
     G4double pp = targetParticle.GetMomentum().mag();
     G4double tarmas = targetParticle.GetMass();
     targetParticle.SetTotalEnergy( std::sqrt( pp*pp + tarmas*tarmas ) );
       
     theParticleChange.SetEnergyChange( modifiedOriginal.GetKineticEnergy() );
     G4DynamicParticle *pd = new G4DynamicParticle;
     pd->SetDefinition( targetParticle.GetDefinition() );
     pd->SetMomentum( targetParticle.GetMomentum() );
     theParticleChange.AddSecondary( pd );
     return;
   }
 
   G4FastVector<G4ReactionProduct,4> vec;  // vec will contain the secondary particles
   G4int vecLen = 0;
   vec.Initialize( 0 );
     
   G4double theAtomicMass = targetNucleus.AtomicMass( A, Z );
   G4double massVec[9];
   massVec[0] = targetNucleus.AtomicMass( A+1.0, Z     );
   massVec[1] = theAtomicMass;
   massVec[2] = 0.;
   if (Z > 1.0) massVec[2] = targetNucleus.AtomicMass(A, Z-1.0);
   massVec[3] = 0.;
   if (Z > 1.0 && A > 1.0) massVec[3] = targetNucleus.AtomicMass(A-1.0, Z-1.0 );
   massVec[4] = 0.;
   if (Z > 1.0 && A > 2.0 && A-2.0 > Z-1.0)
     massVec[4] = targetNucleus.AtomicMass( A-2.0, Z-1.0 );
   massVec[5] = 0.;
   if (Z > 2.0 && A > 3.0 && A-3.0 > Z-2.0)
     massVec[5] = targetNucleus.AtomicMass( A-3.0, Z-2.0 );
   massVec[6] = 0.;
   if (A > 1.0 && A-1.0 > Z) massVec[6] = targetNucleus.AtomicMass(A-1.0, Z);
   massVec[7] = massVec[3];
   massVec[8] = 0.;
   if (Z > 2.0 && A > 1.0) massVec[8] = targetNucleus.AtomicMass( A-1.0,Z-2.0 );
     
   twoBody.NuclearReaction(vec, vecLen, originalIncident,
                           targetNucleus, theAtomicMass, massVec );
     
   theParticleChange.SetStatusChange( stopAndKill );
   theParticleChange.SetEnergyChange( 0.0 );
     
   G4DynamicParticle* pd;
   for( G4int i=0; i<vecLen; ++i ) {
     pd = new G4DynamicParticle();
     pd->SetDefinition( vec[i]->GetDefinition() );
     pd->SetMomentum( vec[i]->GetMomentum() );
     theParticleChange.AddSecondary( pd );
     delete vec[i];
   }
 }

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

Public Member Functions

Private Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ G4RPGNeutronInelastic()

◆ ~G4RPGNeutronInelastic()

Member Function Documentation

◆ ApplyYourself()

◆ InitialCollision()

◆ SlowNeutron()