Geant4 9.6.0
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")
 
virtual ~G4eeToHadronsModel ()
 
virtual void Initialise (const G4ParticleDefinition *, const G4DataVector &)
 
virtual G4double CrossSectionPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy, G4double maxEnergy)
 
virtual G4double ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kineticEnergy, G4double Z, G4double A, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
virtual G4double ComputeCrossSectionPerElectron (const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
virtual void SampleSecondaries (std::vector< G4DynamicParticle * > *, const G4MaterialCutsCouple *, const G4DynamicParticle *, G4double tmin=0.0, G4double maxEnergy=DBL_MAX)
 
G4DynamicParticle * GenerateCMPhoton (G4double)
 
G4double PeakEnergy () const
 
- Public Member Functions inherited from G4VEmModel
 G4VEmModel (const G4String &nam)
 
virtual ~G4VEmModel ()
 
virtual void Initialise (const G4ParticleDefinition *, const G4DataVector &)=0
 
virtual void SampleSecondaries (std::vector< G4DynamicParticle * > *, const G4MaterialCutsCouple *, const G4DynamicParticle *, G4double tmin=0.0, G4double tmax=DBL_MAX)=0
 
virtual G4double ComputeDEDXPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=DBL_MAX)
 
virtual G4double CrossSectionPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
virtual G4double ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0., 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 *, G4double &eloss, G4double &niel, G4double length)
 
virtual G4double Value (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy)
 
virtual G4double MinPrimaryEnergy (const G4Material *, const G4ParticleDefinition *)
 
virtual void SetupForMaterial (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
 
virtual void DefineForRegion (const G4Region *)
 
void InitialiseElementSelectors (const G4ParticleDefinition *, const G4DataVector &)
 
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)
 
G4int SelectIsotopeNumber (const G4Element *)
 
const G4Element * SelectRandomAtom (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, 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)
 
void SetParticleChange (G4VParticleChange *, G4VEmFluctuationModel *f=0)
 
void SetCrossSectionTable (G4PhysicsTable *)
 
G4PhysicsTable * GetCrossSectionTable ()
 
G4VEmFluctuationModel * GetModelOfFluctuations ()
 
G4VEmAngularDistribution * GetAngularDistribution ()
 
void SetAngularDistribution (G4VEmAngularDistribution *)
 
G4double HighEnergyLimit () const
 
G4double LowEnergyLimit () const
 
G4double HighEnergyActivationLimit () const
 
G4double LowEnergyActivationLimit () const
 
G4double PolarAngleLimit () const
 
G4double SecondaryThreshold () const
 
G4bool LPMFlag () const
 
G4bool DeexcitationFlag () const
 
G4bool ForceBuildTableFlag () const
 
void SetHighEnergyLimit (G4double)
 
void SetLowEnergyLimit (G4double)
 
void SetActivationHighEnergyLimit (G4double)
 
void SetActivationLowEnergyLimit (G4double)
 
G4bool IsActive (G4double kinEnergy)
 
void SetPolarAngleLimit (G4double)
 
void SetSecondaryThreshold (G4double)
 
void SetLPMFlag (G4bool val)
 
void SetDeexcitationFlag (G4bool val)
 
void ForceBuildTable (G4bool val)
 
G4double MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)
 
const G4String & GetName () const
 
void SetCurrentCouple (const G4MaterialCutsCouple *)
 
const G4Element * GetCurrentElement () const
 

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
G4VParticleChange * pParticleChange
 
G4PhysicsTable * xSectionTable
 
const std::vector< G4double > * theDensityFactor
 
const std::vector< G4int > * theDensityIdx
 

Detailed Description

Definition at line 59 of file G4eeToHadronsModel.hh.

Constructor & Destructor Documentation

◆ G4eeToHadronsModel()

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

Definition at line 68 of file G4eeToHadronsModel.cc.

70 : G4VEmModel(nam),
71 model(mod),
72 crossPerElectron(0),
73 crossBornPerElectron(0),
74 isInitialised(false),
75 nbins(100),
76 verbose(ver)
77{
78 theGamma = G4Gamma::Gamma();
79 highKinEnergy = HighEnergyLimit();
80 lowKinEnergy = LowEnergyLimit();
81 emin = lowKinEnergy;
82 emax = highKinEnergy;
83 peakKinEnergy = highKinEnergy;
84 epeak = emax;
85}
G4Gamma::Gamma
static G4Gamma * Gamma()
Definition: G4Gamma.cc:86
G4VEmModel::LowEnergyLimit
G4double LowEnergyLimit() const
Definition: G4VEmModel.hh:529
G4VEmModel::HighEnergyLimit
G4double HighEnergyLimit() const
Definition: G4VEmModel.hh:522

◆ ~G4eeToHadronsModel()

G4eeToHadronsModel::~G4eeToHadronsModel ( )
virtual

Definition at line 89 of file G4eeToHadronsModel.cc.

90{
91 delete model;
92 delete crossPerElectron;
93 delete crossBornPerElectron;
94}

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

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

Reimplemented from G4VEmModel.

Definition at line 195 of file G4eeToHadronsModel.cc.

200{
201 return Z*ComputeCrossSectionPerElectron(p, kineticEnergy);
202}
G4eeToHadronsModel::ComputeCrossSectionPerElectron
virtual G4double ComputeCrossSectionPerElectron(const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
Definition: G4eeToHadronsModel.cc:206

◆ ComputeCrossSectionPerElectron()

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

Definition at line 206 of file G4eeToHadronsModel.cc.

210{
211 G4double cross = 0.0;
212 if(crossPerElectron) {
213 G4bool b;
214 G4double e = 2.0*electron_mass_c2*
215 sqrt(1.0 + 0.5*kineticEnergy/electron_mass_c2);
216 cross = crossPerElectron->GetValue(e, b);
217 }
218 // G4cout << "e= " << kineticEnergy << " cross= " << cross << G4endl;
219 return cross;
220}
G4double
double G4double
Definition: G4Types.hh:64
G4bool
bool G4bool
Definition: G4Types.hh:67
G4PhysicsVector::GetValue
G4double GetValue(G4double theEnergy, G4bool &isOutRange)

Referenced by ComputeCrossSectionPerAtom(), and CrossSectionPerVolume().

◆ CrossSectionPerVolume()

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

Reimplemented from G4VEmModel.

Definition at line 183 of file G4eeToHadronsModel.cc.

188{
189 return mat->GetElectronDensity()*
190 ComputeCrossSectionPerElectron(p, kineticEnergy);
191}
G4Material::GetElectronDensity
G4double GetElectronDensity() const
Definition: G4Material.hh:216

◆ GenerateCMPhoton()

G4DynamicParticle * G4eeToHadronsModel::GenerateCMPhoton ( G4double  e)

Definition at line 303 of file G4eeToHadronsModel.cc.

304{
305 G4bool b;
306 G4double x;
307 G4DynamicParticle* gamma = 0;
308 G4double L = 2.0*log(e/electron_mass_c2);
309 G4double bt = 2.0*fine_structure_const*(L - 1.)/pi;
310 G4double btm1= bt - 1.0;
311 G4double del = 1. + fine_structure_const*(1.5*L + pi*pi/3. -2.)/pi;
312
313 G4double s0 = crossBornPerElectron->GetValue(e, b);
314 G4double de = (emax - emin)/(G4double)nbins;
315 G4double x0 = min(de,e - emin)/e;
316 G4double ds = crossBornPerElectron->GetValue(e, b)
317 *(del*pow(x0,bt) - bt*(x0 - 0.25*x0*x0));
318 G4double e1 = e*(1. - x0);
319
320 if(e1 < emax && s0*G4UniformRand()<ds) {
321 x = x0*pow(G4UniformRand(),1./bt);
322 } else {
323
324 x = 1. - e1/e;
325 G4double s1 = crossBornPerElectron->GetValue(e1, b);
326 G4double w1 = bt*(del*pow(x,btm1) - 1.0 + 0.5*x);
327 G4double grej = s1*w1;
328 G4double f;
329 // G4cout << "e= " << e/GeV << " epeak= " << epeak/GeV
330 // << " s1= " << s1 << " w1= " << w1
331 // << " grej= " << grej << G4endl;
332 // Above emax cross section is 0
333 if(e1 > emax) {
334 x = 1. - emax/e;
335 G4double s2 = crossBornPerElectron->GetValue(emax, b);
336 G4double w2 = bt*(del*pow(x,btm1) - 1.0 + 0.5*x);
337 grej = s2*w2;
338 // G4cout << "emax= " << emax << " s2= " << s2 << " w2= " << w2
339 // << " grej= " << grej << G4endl;
340 }
341
342 if(e1 > epeak) {
343 x = 1. - epeak/e;
344 G4double s2 = crossBornPerElectron->GetValue(epeak, b);
345 G4double w2 = bt*(del*pow(x,btm1) - 1.0 + 0.5*x);
346 grej = max(grej,s2*w2);
347 //G4cout << "epeak= " << epeak << " s2= " << s2 << " w2= " << w2
348 // << " grej= " << grej << G4endl;
349 }
350 G4double xmin = 1. - e1/e;
351 if(e1 > emax) xmin = 1. - emax/e;
352 G4double xmax = 1. - emin/e;
353 do {
354 x = xmin + G4UniformRand()*(xmax - xmin);
355 G4double s2 = crossBornPerElectron->GetValue((1.0 - x)*e, b);
356 G4double w2 = bt*(del*pow(x,btm1) - 1.0 + 0.5*x);
357 //G4cout << "x= " << x << " xmin= " << xmin << " xmax= " << xmax
358 // << " s2= " << s2 << " w2= " << w2
359 // << G4endl;
360 f = s2*w2;
361 if(f > grej) {
362 G4cout << "G4DynamicParticle* G4eeToHadronsModel:WARNING "
363 << f << " > " << grej << " majorant is`small!"
364 << G4endl;
365 }
366 } while (f < grej*G4UniformRand());
367 }
368
369 G4ThreeVector dir(0.0,0.0,1.0);
370 gamma = new G4DynamicParticle(theGamma,dir,x*e);
371 return gamma;
372}
G4endl
#define G4endl
Definition: G4ios.hh:52
G4cout
G4DLLIMPORT std::ostream G4cout
G4UniformRand
#define G4UniformRand()
Definition: Randomize.hh:53
G4INCL::Math::pi
const G4double pi
Definition: G4INCLGlobals.hh:70

Referenced by SampleSecondaries().

◆ Initialise()

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

Implements G4VEmModel.

Definition at line 98 of file G4eeToHadronsModel.cc.

100{
101 if(isInitialised) { return; }
102 isInitialised = true;
103
104 // Lab system
105 highKinEnergy = HighEnergyLimit();
106 lowKinEnergy = LowEnergyLimit();
107
108 // CM system
109 emin = model->LowEnergy();
110 emax = model->HighEnergy();
111
112 G4double emin0 =
113 2.0*electron_mass_c2*sqrt(1.0 + 0.5*lowKinEnergy/electron_mass_c2);
114 G4double emax0 =
115 2.0*electron_mass_c2*sqrt(1.0 + 0.5*highKinEnergy/electron_mass_c2);
116
117 // recompute low energy
118 if(emin0 > emax) {
119 emin0 = emax;
120 model->SetLowEnergy(emin0);
121 }
122 if(emin > emin0) {
123 emin0 = emin;
124 lowKinEnergy = 0.5*emin*emin/electron_mass_c2 - 2.0*electron_mass_c2;
125 SetLowEnergyLimit(lowKinEnergy);
126 }
127
128 // recompute high energy
129 if(emax < emax0) {
130 emax0 = emax;
131 highKinEnergy = 0.5*emax*emax/electron_mass_c2 - 2.0*electron_mass_c2;
132 SetHighEnergyLimit(highKinEnergy);
133 }
134
135 // peak energy
136 epeak = std::min(model->PeakEnergy(), emax);
137 peakKinEnergy = 0.5*epeak*epeak/electron_mass_c2 - 2.0*electron_mass_c2;
138
139 if(verbose>0) {
140 G4cout << "G4eeToHadronsModel::Initialise: " << G4endl;
141 G4cout << "LabSystem: emin(GeV)= " << lowKinEnergy/GeV
142 << " epeak(GeV)= " << peakKinEnergy/GeV
143 << " emax(GeV)= " << highKinEnergy/GeV
144 << G4endl;
145 G4cout << "SM System: emin(MeV)= " << emin/MeV
146 << " epeak(MeV)= " << epeak/MeV
147 << " emax(MeV)= " << emax/MeV
148 << G4endl;
149 }
150
151 if(lowKinEnergy < peakKinEnergy) {
152 crossBornPerElectron = model->PhysicsVector(emin, emax);
153 crossPerElectron = model->PhysicsVector(emin, emax);
154 nbins = crossPerElectron->GetVectorLength();
155 for(G4int i=0; i<nbins; i++) {
156 G4double e = crossPerElectron->GetLowEdgeEnergy(i);
157 G4double cs = model->ComputeCrossSection(e);
158 crossBornPerElectron->PutValue(i, cs);
159 }
160 ComputeCMCrossSectionPerElectron();
161 }
162 if(verbose>1) {
163 G4cout << "G4eeToHadronsModel: Cross secsions per electron"
164 << " nbins= " << nbins
165 << " emin(MeV)= " << emin/MeV
166 << " emax(MeV)= " << emax/MeV
167 << G4endl;
168 G4bool b;
169 for(G4int i=0; i<nbins; i++) {
170 G4double e = crossPerElectron->GetLowEdgeEnergy(i);
171 G4double s1 = crossPerElectron->GetValue(e, b);
172 G4double s2 = crossBornPerElectron->GetValue(e, b);
173 G4cout << "E(MeV)= " << e/MeV
174 << " cross(nb)= " << s1/nanobarn
175 << " crossBorn(nb)= " << s2/nanobarn
176 << G4endl;
177 }
178 }
179}
G4int
int G4int
Definition: G4Types.hh:66
G4PhysicsVector::GetVectorLength
size_t GetVectorLength() const
G4PhysicsVector::GetLowEdgeEnergy
virtual G4double GetLowEdgeEnergy(size_t binNumber) const
Definition: G4PhysicsVector.cc:158
G4PhysicsVector::PutValue
void PutValue(size_t index, G4double theValue)
G4VEmModel::SetHighEnergyLimit
void SetHighEnergyLimit(G4double)
Definition: G4VEmModel.hh:585
G4VEmModel::SetLowEnergyLimit
void SetLowEnergyLimit(G4double)
Definition: G4VEmModel.hh:592
G4Vee2hadrons::SetLowEnergy
void SetLowEnergy(G4double val)
Definition: G4Vee2hadrons.hh:80
G4Vee2hadrons::PhysicsVector
virtual G4PhysicsVector * PhysicsVector(G4double, G4double) const =0
G4Vee2hadrons::LowEnergy
G4double LowEnergy() const
Definition: G4Vee2hadrons.hh:82
G4Vee2hadrons::ComputeCrossSection
virtual G4double ComputeCrossSection(G4double) const =0
G4Vee2hadrons::PeakEnergy
virtual G4double PeakEnergy() const =0
G4Vee2hadrons::HighEnergy
G4double HighEnergy() const
Definition: G4Vee2hadrons.hh:86

◆ PeakEnergy()

G4double G4eeToHadronsModel::PeakEnergy ( ) const
inline

Definition at line 127 of file G4eeToHadronsModel.hh.

128{
129 return peakKinEnergy;
130}

◆ SampleSecondaries()

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

Implements G4VEmModel.

Definition at line 224 of file G4eeToHadronsModel.cc.

229{
230 if(crossPerElectron) {
231 G4double t = dParticle->GetKineticEnergy();
232 G4double e = 2.0*electron_mass_c2*sqrt(1.0 + 0.5*t/electron_mass_c2);
233 G4LorentzVector inlv = dParticle->Get4Momentum();
234 G4ThreeVector inBoost = inlv.boostVector();
235 if(e > emin) {
236 G4DynamicParticle* gamma = GenerateCMPhoton(e);
237 G4LorentzVector gLv = gamma->Get4Momentum();
238 G4LorentzVector lv(0.0,0.0,0.0,e);
239 lv -= gLv;
240 G4double mass = lv.m();
241 G4ThreeVector boost = lv.boostVector();
242 const G4ThreeVector dir = gamma->GetMomentumDirection();
243 model->SampleSecondaries(newp, mass, dir);
244 G4int np = newp->size();
245 for(G4int j=0; j<np; j++) {
246 G4DynamicParticle* dp = (*newp)[j];
247 G4LorentzVector v = dp->Get4Momentum();
248 v.boost(boost);
249 v.boost(inBoost);
250 dp->Set4Momentum(v);
251 }
252 gLv.boost(inBoost);
253 gamma->Set4Momentum(gLv);
254 newp->push_back(gamma);
255 }
256 }
257}
CLHEP::HepLorentzVector::boostVector
Hep3Vector boostVector() const
Definition: LorentzVector.cc:177
CLHEP::HepLorentzVector::boost
HepLorentzVector & boost(double, double, double)
Definition: LorentzVector.cc:59
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:351
G4Vee2hadrons::SampleSecondaries
virtual void SampleSecondaries(std::vector< G4DynamicParticle * > *, G4double, const G4ThreeVector &)=0
G4eeToHadronsModel::GenerateCMPhoton
G4DynamicParticle * GenerateCMPhoton(G4double)
Definition: G4eeToHadronsModel.cc:303
The documentation for this class was generated from the following files: