Geant4 11.2.2
Toolkit for the simulation of the passage of particles through matter
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Public Member Functions | List of all members
G4eeToHadronsModel Class Reference

#include <G4eeToHadronsModel.hh>

+ Inheritance diagram for G4eeToHadronsModel:

Public Member Functions

 G4eeToHadronsModel (G4Vee2hadrons *, G4int ver=0, const G4String &nam="eeToHadrons")
 
 ~G4eeToHadronsModel () override
 
void Initialise (const G4ParticleDefinition *, const G4DataVector &) override
 
G4double CrossSectionPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy, G4double maxEnergy) override
 
G4double ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kineticEnergy, G4double Z, G4double A, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX) override
 
G4double ComputeCrossSectionPerElectron (const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
void SampleSecondaries (std::vector< G4DynamicParticle * > *, const G4MaterialCutsCouple *, const G4DynamicParticle *, G4double tmin=0.0, G4double maxEnergy=DBL_MAX) override
 
G4DynamicParticle * GenerateCMPhoton (G4double)
 
G4double PeakEnergy () const
 
G4eeToHadronsModel & operator= (const G4eeToHadronsModel &right)=delete
 
 G4eeToHadronsModel (const G4eeToHadronsModel &)=delete
 
- Public Member Functions inherited from G4VEmModel
 G4VEmModel (const G4String &nam)
 
virtual ~G4VEmModel ()
 
virtual void InitialiseLocal (const G4ParticleDefinition *, G4VEmModel *masterModel)
 
virtual void InitialiseForMaterial (const G4ParticleDefinition *, const G4Material *)
 
virtual void InitialiseForElement (const G4ParticleDefinition *, G4int Z)
 
virtual G4double ComputeDEDXPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=DBL_MAX)
 
virtual G4double GetPartialCrossSection (const G4Material *, G4int level, const G4ParticleDefinition *, G4double kineticEnergy)
 
virtual G4double ComputeCrossSectionPerShell (const G4ParticleDefinition *, G4int Z, G4int shellIdx, G4double kinEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
virtual G4double ChargeSquareRatio (const G4Track &)
 
virtual G4double GetChargeSquareRatio (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
 
virtual G4double GetParticleCharge (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
 
virtual void StartTracking (G4Track *)
 
virtual void CorrectionsAlongStep (const G4MaterialCutsCouple *, const G4DynamicParticle *, const G4double &length, G4double &eloss)
 
virtual G4double Value (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy)
 
virtual G4double MinPrimaryEnergy (const G4Material *, const G4ParticleDefinition *, G4double cut=0.0)
 
virtual G4double MinEnergyCut (const G4ParticleDefinition *, const G4MaterialCutsCouple *)
 
virtual void SetupForMaterial (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
 
virtual void DefineForRegion (const G4Region *)
 
virtual void FillNumberOfSecondaries (G4int &numberOfTriplets, G4int &numberOfRecoil)
 
virtual void ModelDescription (std::ostream &outFile) const
 
void InitialiseElementSelectors (const G4ParticleDefinition *, const G4DataVector &)
 
std::vector< G4EmElementSelector * > * GetElementSelectors ()
 
void SetElementSelectors (std::vector< G4EmElementSelector * > *)
 
G4double ComputeDEDX (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=DBL_MAX)
 
G4double CrossSection (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
G4double ComputeMeanFreePath (const G4ParticleDefinition *, G4double kineticEnergy, const G4Material *, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
G4double ComputeCrossSectionPerAtom (const G4ParticleDefinition *, const G4Element *, G4double kinEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
const G4Element * SelectRandomAtom (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
const G4Element * SelectTargetAtom (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double logKineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
const G4Element * SelectRandomAtom (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
const G4Element * GetCurrentElement (const G4Material *mat=nullptr) const
 
G4int SelectRandomAtomNumber (const G4Material *) const
 
const G4Isotope * GetCurrentIsotope (const G4Element *elm=nullptr) const
 
G4int SelectIsotopeNumber (const G4Element *) const
 
void SetParticleChange (G4VParticleChange *, G4VEmFluctuationModel *f=nullptr)
 
void SetCrossSectionTable (G4PhysicsTable *, G4bool isLocal)
 
G4ElementData * GetElementData ()
 
G4PhysicsTable * GetCrossSectionTable ()
 
G4VEmFluctuationModel * GetModelOfFluctuations ()
 
G4VEmAngularDistribution * GetAngularDistribution ()
 
G4VEmModel * GetTripletModel ()
 
void SetTripletModel (G4VEmModel *)
 
void SetAngularDistribution (G4VEmAngularDistribution *)
 
G4double HighEnergyLimit () const
 
G4double LowEnergyLimit () const
 
G4double HighEnergyActivationLimit () const
 
G4double LowEnergyActivationLimit () const
 
G4double PolarAngleLimit () const
 
G4double SecondaryThreshold () const
 
G4bool DeexcitationFlag () const
 
G4bool ForceBuildTableFlag () const
 
G4bool UseAngularGeneratorFlag () const
 
void SetAngularGeneratorFlag (G4bool)
 
void SetHighEnergyLimit (G4double)
 
void SetLowEnergyLimit (G4double)
 
void SetActivationHighEnergyLimit (G4double)
 
void SetActivationLowEnergyLimit (G4double)
 
G4bool IsActive (G4double kinEnergy) const
 
void SetPolarAngleLimit (G4double)
 
void SetSecondaryThreshold (G4double)
 
void SetDeexcitationFlag (G4bool val)
 
void SetForceBuildTable (G4bool val)
 
void SetFluctuationFlag (G4bool val)
 
void SetMasterThread (G4bool val)
 
G4bool IsMaster () const
 
void SetUseBaseMaterials (G4bool val)
 
G4bool UseBaseMaterials () const
 
G4double MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)
 
const G4String & GetName () const
 
void SetCurrentCouple (const G4MaterialCutsCouple *)
 
G4bool IsLocked () const
 
void SetLocked (G4bool)
 
void SetLPMFlag (G4bool)
 
G4VEmModel & operator= (const G4VEmModel &right)=delete
 
 G4VEmModel (const G4VEmModel &)=delete
 

Additional Inherited Members

- Protected Member Functions inherited from G4VEmModel
G4ParticleChangeForLoss * GetParticleChangeForLoss ()
 
G4ParticleChangeForGamma * GetParticleChangeForGamma ()
 
virtual G4double MaxSecondaryEnergy (const G4ParticleDefinition *, G4double kineticEnergy)
 
const G4MaterialCutsCouple * CurrentCouple () const
 
void SetCurrentElement (const G4Element *)
 
- Protected Attributes inherited from G4VEmModel
G4ElementData * fElementData = nullptr
 
G4VParticleChange * pParticleChange = nullptr
 
G4PhysicsTable * xSectionTable = nullptr
 
const G4Material * pBaseMaterial = nullptr
 
const std::vector< G4double > * theDensityFactor = nullptr
 
const std::vector< G4int > * theDensityIdx = nullptr
 
G4double inveplus
 
G4double pFactor = 1.0
 
std::size_t currentCoupleIndex = 0
 
std::size_t basedCoupleIndex = 0
 
G4bool lossFlucFlag = true
 

Detailed Description

Definition at line 58 of file G4eeToHadronsModel.hh.

Constructor & Destructor Documentation

◆ G4eeToHadronsModel() [1/2]

G4eeToHadronsModel::G4eeToHadronsModel ( G4Vee2hadrons * mod,
G4int ver = 0,
const G4String & nam = "eeToHadrons" )
explicit

Definition at line 69 of file G4eeToHadronsModel.cc.

71 : G4VEmModel(nam),
72 model(mod),
73 verbose(ver)
74{
75 theGamma = G4Gamma::Gamma();
76 highKinEnergy = HighEnergyLimit();
77 lowKinEnergy = LowEnergyLimit();
78 emin = lowKinEnergy;
79 emax = highKinEnergy;
80 peakKinEnergy = highKinEnergy;
81 epeak = emax;
82 //verbose = 1;
83}
G4Gamma::Gamma
static G4Gamma * Gamma()
Definition G4Gamma.cc:81
G4VEmModel::LowEnergyLimit
G4double LowEnergyLimit() const
Definition G4VEmModel.hh:640
G4VEmModel::HighEnergyLimit
G4double HighEnergyLimit() const
Definition G4VEmModel.hh:633
G4VEmModel::G4VEmModel
G4VEmModel(const G4String &nam)
Definition G4VEmModel.cc:67

◆ ~G4eeToHadronsModel()

G4eeToHadronsModel::~G4eeToHadronsModel ( )
override

Definition at line 87 of file G4eeToHadronsModel.cc.

88{
89 delete model;
90}

◆ G4eeToHadronsModel() [2/2]

G4eeToHadronsModel::G4eeToHadronsModel ( const G4eeToHadronsModel & )
delete

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

G4double G4eeToHadronsModel::ComputeCrossSectionPerAtom ( const G4ParticleDefinition * p,
G4double kineticEnergy,
G4double Z,
G4double A,
G4double cutEnergy = 0.0,
G4double maxEnergy = DBL_MAX )
overridevirtual

Reimplemented from G4VEmModel.

Definition at line 157 of file G4eeToHadronsModel.cc.

162{
163 return Z*ComputeCrossSectionPerElectron(p, kineticEnergy);
164}
G4eeToHadronsModel::ComputeCrossSectionPerElectron
G4double ComputeCrossSectionPerElectron(const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
Definition G4eeToHadronsModel.cc:168

◆ ComputeCrossSectionPerElectron()

G4double G4eeToHadronsModel::ComputeCrossSectionPerElectron ( const G4ParticleDefinition * ,
G4double kineticEnergy,
G4double cutEnergy = 0.0,
G4double maxEnergy = DBL_MAX )

Definition at line 168 of file G4eeToHadronsModel.cc.

172{
173 return crossPerElectron->Value(energy);
174}
G4PhysicsVector::Value
G4double Value(const G4double energy, std::size_t &lastidx) const

Referenced by ComputeCrossSectionPerAtom(), and CrossSectionPerVolume().

◆ CrossSectionPerVolume()

G4double G4eeToHadronsModel::CrossSectionPerVolume ( const G4Material * mat,
const G4ParticleDefinition * p,
G4double kineticEnergy,
G4double cutEnergy,
G4double maxEnergy )
overridevirtual

Reimplemented from G4VEmModel.

Definition at line 145 of file G4eeToHadronsModel.cc.

150{
151 return mat->GetElectronDensity()*
152 ComputeCrossSectionPerElectron(p, kineticEnergy);
153}
G4Material::GetElectronDensity
G4double GetElectronDensity() const
Definition G4Material.hh:203

◆ GenerateCMPhoton()

G4DynamicParticle * G4eeToHadronsModel::GenerateCMPhoton ( G4double e)

Definition at line 268 of file G4eeToHadronsModel.cc.

269{
270 G4double x;
271 G4DynamicParticle* gamma = nullptr;
272 G4double LL = 2.0*G4Log(e/electron_mass_c2);
273 G4double bt = 2.0*fine_structure_const*(LL - 1.)/pi;
274 G4double btm1= bt - 1.0;
275 G4double del = 1. + fine_structure_const*(1.5*LL + pi*pi/3. -2.)/pi;
276
277 G4double s0 = crossBornPerElectron->Value(e);
278 G4double de = (emax - emin)/(G4double)nbins;
279 G4double xmax = 0.5*(1.0 - (emin*emin)/(e*e));
280 G4double xmin = std::min(de/e, xmax);
281 G4double ds = s0*(del*G4Exp(G4Log(xmin)*bt) - bt*(xmin - 0.25*xmin*xmin));
282 G4double e1 = e*(1. - xmin);
283
284 //G4cout << "e1= " << e1 << G4endl;
285 if(e1 < emax && s0*G4UniformRand()<ds) {
286 x = xmin*G4Exp(G4Log(G4UniformRand())/bt);
287 } else {
288
289 x = xmin;
290 G4double s1 = crossBornPerElectron->Value(e1);
291 G4double w1 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
292 G4double grej = s1*w1;
293 G4double f;
294 /*
295 G4cout << "e(GeV)= " << e/GeV << " epeak(GeV)= " << epeak/GeV
296 << " s1= " << s1 << " w1= " << w1
297 << " grej= " << grej << G4endl;
298 */
299 // Above emax cross section is const
300 if(e1 > emax) {
301 x = 0.5*(1. - (emax*emax)/(e*e));
302 G4double s2 = crossBornPerElectron->Value(emax);
303 G4double w2 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
304 grej = s2*w2;
305 //G4cout << "emax= " << emax << " s2= " << s2 << " w2= " << w2
306 // << " grej= " << grej << G4endl;
307 }
308
309 if(e1 > epeak) {
310 x = 0.5*(1.0 - (epeak*epeak)/(e*e));
311 G4double s2 = crossBornPerElectron->Value(epeak);
312 G4double w2 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
313 grej = std::max(grej,s2*w2);
314 //G4cout << "epeak= " << epeak << " s2= " << s2 << " w2= " << w2
315 // << " grej= " << grej << G4endl;
316 }
317 G4int ii = 0;
318 const G4int iimax = 1000;
319 do {
320 x = xmin + G4UniformRand()*(xmax - xmin);
321
322 G4double s2 = crossBornPerElectron->Value(sqrt(1.0 - 2*x)*e);
323 G4double w2 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
324 /*
325 G4cout << "x= " << x << " xmin= " << xmin << " xmax= " << xmax
326 << " s2= " << s2 << " w2= " << w2 << G4endl;
327 */
328 f = s2*w2;
329 if(f > grej) {
330 G4cout << "G4DynamicParticle* G4eeToHadronsModel:WARNING "
331 << f << " > " << grej << " majorant is`small!"
332 << G4endl;
333 }
334 if(++ii >= iimax) { break; }
335 // Loop checking, 07-Aug-2015, Vladimir Ivanchenko
336 } while (f < grej*G4UniformRand());
337 }
338
339 G4ThreeVector dir(0.0,0.0,1.0);
340 if(G4UniformRand() > 0.5) { dir.set(0.0,0.0,-1.0); }
341 //G4cout << "Egamma(MeV)= " << x*e << " " << dir << G4endl;
342 gamma = new G4DynamicParticle(theGamma,dir,x*e);
343 return gamma;
344}
G4Exp
G4double G4Exp(G4double initial_x)
Exponential Function double precision.
Definition G4Exp.hh:180
G4Log
G4double G4Log(G4double x)
Definition G4Log.hh:227
G4double
double G4double
Definition G4Types.hh:83
G4int
int G4int
Definition G4Types.hh:85
G4endl
#define G4endl
Definition G4ios.hh:67
G4cout
G4GLOB_DLL std::ostream G4cout
G4UniformRand
#define G4UniformRand()
Definition Randomize.hh:52

Referenced by SampleSecondaries().

◆ Initialise()

void G4eeToHadronsModel::Initialise ( const G4ParticleDefinition * ,
const G4DataVector &  )
overridevirtual

Implements G4VEmModel.

Definition at line 94 of file G4eeToHadronsModel.cc.

96{
97 if(isInitialised) { return; }
98 isInitialised = true;
99
100 // CM system
101 emin = model->LowEnergy();
102 emax = model->HighEnergy();
103
104 // peak energy
105 epeak = std::min(model->PeakEnergy(), emax);
106
107 if(verbose>0) {
108 G4cout << "G4eeToHadronsModel::Initialise: " << G4endl;
109 G4cout << "CM System: emin(MeV)= " << emin/MeV
110 << " epeak(MeV)= " << epeak/MeV
111 << " emax(MeV)= " << emax/MeV
112 << G4endl;
113 }
114
115 crossBornPerElectron = model->PhysicsVector();
116 crossPerElectron = model->PhysicsVector();
117 nbins = (G4int)crossPerElectron->GetVectorLength();
118 for(G4int i=0; i<nbins; ++i) {
119 G4double e = crossPerElectron->Energy(i);
120 G4double cs = model->ComputeCrossSection(e);
121 crossBornPerElectron->PutValue(i, cs);
122 }
123 ComputeCMCrossSectionPerElectron();
124
125 if(verbose>1) {
126 G4cout << "G4eeToHadronsModel: Cross sections per electron"
127 << " nbins= " << nbins
128 << " emin(MeV)= " << emin/MeV
129 << " emax(MeV)= " << emax/MeV
130 << G4endl;
131 for(G4int i=0; i<nbins; ++i) {
132 G4double e = crossPerElectron->Energy(i);
133 G4double s1 = crossPerElectron->Value(e);
134 G4double s2 = crossBornPerElectron->Value(e);
135 G4cout << "E(MeV)= " << e/MeV
136 << " cross(nb)= " << s1/nanobarn
137 << " crossBorn(nb)= " << s2/nanobarn
138 << G4endl;
139 }
140 }
141}
G4PhysicsVector::PutValue
void PutValue(const std::size_t index, const G4double value)
G4PhysicsVector::Energy
G4double Energy(const std::size_t index) const
G4PhysicsVector::GetVectorLength
std::size_t GetVectorLength() const
G4Vee2hadrons::PhysicsVector
G4PhysicsVector * PhysicsVector() const
Definition G4Vee2hadrons.hh:83
G4Vee2hadrons::LowEnergy
G4double LowEnergy() const
Definition G4Vee2hadrons.hh:93
G4Vee2hadrons::ComputeCrossSection
virtual G4double ComputeCrossSection(G4double) const =0
G4Vee2hadrons::PeakEnergy
virtual G4double PeakEnergy() const =0
G4Vee2hadrons::HighEnergy
G4double HighEnergy() const
Definition G4Vee2hadrons.hh:95

◆ operator=()

G4eeToHadronsModel & G4eeToHadronsModel::operator= ( const G4eeToHadronsModel & right)
delete

◆ PeakEnergy()

G4double G4eeToHadronsModel::PeakEnergy ( ) const
inline

Definition at line 126 of file G4eeToHadronsModel.hh.

127{
128 return peakKinEnergy;
129}

◆ SampleSecondaries()

void G4eeToHadronsModel::SampleSecondaries ( std::vector< G4DynamicParticle * > * newp,
const G4MaterialCutsCouple * ,
const G4DynamicParticle * dParticle,
G4double tmin = 0.0,
G4double maxEnergy = DBL_MAX )
overridevirtual

Implements G4VEmModel.

Definition at line 178 of file G4eeToHadronsModel.cc.

183{
184 G4double t = dParticle->GetKineticEnergy() + 2*electron_mass_c2;
185 G4LorentzVector inlv = dParticle->Get4Momentum() +
186 G4LorentzVector(0.0,0.0,0.0,electron_mass_c2);
187 G4double e = inlv.m();
188 G4ThreeVector inBoost = inlv.boostVector();
189 //G4cout << "G4eeToHadronsModel::SampleSecondaries e= " << e
190 // << " " << inlv << " " << inBoost <<G4endl;
191 if(e > emin) {
192 G4DynamicParticle* gamma = GenerateCMPhoton(e);
193 G4LorentzVector gLv = gamma->Get4Momentum();
194 G4LorentzVector lv(0.0,0.0,0.0,e);
195 lv -= gLv;
196 G4double mass = lv.m();
197 //G4cout << "mass= " << mass << " " << lv << G4endl;
198 G4ThreeVector boost = lv.boostVector();
199 //G4cout << "mass= " << mass << " " << boost << G4endl;
200 const G4ThreeVector dir = gamma->GetMomentumDirection();
201 model->SampleSecondaries(newp, mass, dir);
202 std::size_t np = newp->size();
203 for(std::size_t j=0; j<np; ++j) {
204 G4DynamicParticle* dp = (*newp)[j];
205 G4LorentzVector v = dp->Get4Momentum();
206 v.boost(boost);
207 //G4cout << j << ". " << v << G4endl;
208 v.boost(inBoost);
209 //G4cout << " " << v << G4endl;
210 dp->Set4Momentum(v);
211 t -= v.e();
212 }
213 //G4cout << "Gamma " << gLv << G4endl;
214 gLv.boost(inBoost);
215 //G4cout << " " << gLv << G4endl;
216 gamma->Set4Momentum(gLv);
217 t -= gLv.e();
218 newp->push_back(gamma);
219 if(std::abs(t) > CLHEP::MeV) {
220 G4cout << "G4eeToHadronsModel::SampleSecondaries: Ebalance(MeV)= "
221 << t/MeV << " primary 4-momentum: " << inlv << G4endl;
222 }
223 }
224}
G4LorentzVector
CLHEP::HepLorentzVector G4LorentzVector
Definition G4LorentzVector.hh:33
CLHEP::HepLorentzVector::boostVector
Hep3Vector boostVector() const
Definition LorentzVector.cc:173
CLHEP::HepLorentzVector::boost
HepLorentzVector & boost(double, double, double)
Definition LorentzVector.cc:55
G4DynamicParticle::GetMomentumDirection
const G4ThreeVector & GetMomentumDirection() const
G4DynamicParticle::Get4Momentum
G4LorentzVector Get4Momentum() const
G4DynamicParticle::GetKineticEnergy
G4double GetKineticEnergy() const
G4DynamicParticle::Set4Momentum
void Set4Momentum(const G4LorentzVector &momentum)
Definition G4DynamicParticle.cc:346
G4Vee2hadrons::SampleSecondaries
virtual void SampleSecondaries(std::vector< G4DynamicParticle * > *, G4double, const G4ThreeVector &)=0
G4eeToHadronsModel::GenerateCMPhoton
G4DynamicParticle * GenerateCMPhoton(G4double)
Definition G4eeToHadronsModel.cc:268
The documentation for this class was generated from the following files: