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This commit is contained in:
Gabriele Cosmo
2016-06-09 10:15:15 +02:00
parent 37fff30d2e
commit fbd4999cf7
4396 changed files with 56662 additions and 52446 deletions
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source/processes/electromagnetic/muons/src/G4MuBremsstrahlungModel.cc
+138 -114
View File
@@ -29,14 +29,22 @@
// File name: G4MuBremsstrahlungModel
//
// Author: Vladimir Ivanchenko on base of Laszlo Urban code
//
//
// Creation date: 24.06.2002
//
// Modifications: 04.12.02 (VI) Change G4DynamicParticle constructor in PostStepDoIt
// Modifications:
//
// 04-12-02 Change G4DynamicParticle constructor in PostStepDoIt (V.Ivanchenko)
// 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
// 24-01-03 Fix for compounds (V.Ivanchenko)
// 27-01-03 Make models region aware (V.Ivanchenko)
// 13-02-03 Add name (V.Ivanchenko)
//
//
// Class Description:
//
// Class Description:
//
//
// -------------------------------------------------------------------
//
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -50,10 +58,11 @@
#include "G4Material.hh"
#include "G4Element.hh"
#include "G4ElementVector.hh"
#include "G4ProductionCutsTable.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
// static members
// static members
//
G4double G4MuBremsstrahlungModel::zdat[]={1.,4.,13.,29.,92.};
G4double G4MuBremsstrahlungModel::adat[]={1.01,9.01,26.98,63.55,238.03};
@@ -61,8 +70,9 @@ G4double G4MuBremsstrahlungModel::tdat[]={1.e3,1.e4,1.e5,1.e6,1.e7,1.e8,1.e9,1.e
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4MuBremsstrahlungModel::G4MuBremsstrahlungModel(const G4ParticleDefinition* p)
: G4VEmModel(),
G4MuBremsstrahlungModel::G4MuBremsstrahlungModel(const G4ParticleDefinition* p,
const G4String& nam)
: G4VEmModel(nam),
highKinEnergy(100.*TeV),
lowKinEnergy(1.0*keV),
minThreshold(1.0*keV),
@@ -70,11 +80,8 @@ G4MuBremsstrahlungModel::G4MuBremsstrahlungModel(const G4ParticleDefinition* p)
ntdat(8),
NBIN(1000),
cutFixed(0.98*keV),
oldMaterial(0),
samplingTablesAreFilled(false)
{
partialSumSigma.clear();
}
{}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -90,48 +97,70 @@ G4MuBremsstrahlungModel::~G4MuBremsstrahlungModel()
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4MuBremsstrahlungModel::HighEnergyLimit(const G4ParticleDefinition* p,
const G4Material*)
G4double G4MuBremsstrahlungModel::HighEnergyLimit(const G4ParticleDefinition*)
{
return highKinEnergy;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4MuBremsstrahlungModel::LowEnergyLimit(const G4ParticleDefinition* p,
const G4Material*)
G4double G4MuBremsstrahlungModel::LowEnergyLimit(const G4ParticleDefinition*)
{
return lowKinEnergy;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4MuBremsstrahlungModel::MinEnergyCut(const G4ParticleDefinition* p,
const G4Material*)
G4double G4MuBremsstrahlungModel::MinEnergyCut(const G4ParticleDefinition*,
const G4MaterialCutsCouple*)
{
return minThreshold;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4bool G4MuBremsstrahlungModel::IsInCharge(const G4ParticleDefinition* p,
const G4Material*)
G4bool G4MuBremsstrahlungModel::IsInCharge(const G4ParticleDefinition* p)
{
return (p == G4MuonMinus::MuonMinus() || p == G4MuonPlus::MuonPlus());
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4MuBremsstrahlungModel::ComputeDEDX(const G4Material* material,
const G4ParticleDefinition* p,
G4double kineticEnergy,
G4double cutEnergy)
void G4MuBremsstrahlungModel::Initialise(const G4ParticleDefinition*,
const G4DataVector& cuts)
{
if(kineticEnergy < lowKinEnergy) return 0.0;
const G4ProductionCutsTable* theCoupleTable=
G4ProductionCutsTable::GetProductionCutsTable();
size_t numOfCouples = theCoupleTable->GetTableSize();
G4double fixedEnergy = 0.5*highKinEnergy;
// G4double fixedEnergy = 500000.*TeV;
for (size_t ii=0; ii<partialSumSigma.size(); ii++){
G4DataVector* a=partialSumSigma[ii];
if ( a ) delete a;
}
partialSumSigma.clear();
for (size_t i=0; i<numOfCouples; i++) {
const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(i);
const G4Material* material = couple->GetMaterial();
G4DataVector* dv = ComputePartialSumSigma(material, fixedEnergy,cuts[i]);
partialSumSigma.push_back(dv);
}
if(!samplingTablesAreFilled) MakeSamplingTables();
G4double cut = G4std::min(G4std::max(cutEnergy, minThreshold), kineticEnergy);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4MuBremsstrahlungModel::ComputeDEDX(const G4Material* material,
const G4ParticleDefinition*,
G4double kineticEnergy,
G4double cutEnergy)
{
if(kineticEnergy < lowKinEnergy) return 0.0;
G4double cut = G4std::min(cutEnergy, kineticEnergy);
const G4ElementVector* theElementVector = material->GetElementVector();
const G4double* theAtomicNumDensityVector = material->GetAtomicNumDensityVector();
@@ -141,7 +170,7 @@ G4double G4MuBremsstrahlungModel::ComputeDEDX(const G4Material* material,
for (size_t i=0; i<material->GetNumberOfElements(); i++) {
G4double Z = (*theElementVector)[i]->GetZ();
G4double A = (*theElementVector)[i]->GetA()/(g/mole) ;
G4double A = (*theElementVector)[i]->GetA()/(g/mole) ;
G4double loss = ComputMuBremLoss(Z, A, kineticEnergy, cut);
@@ -162,13 +191,13 @@ G4double G4MuBremsstrahlungModel::ComputMuBremLoss(G4double Z, G4double A,
G4double xgi[]={0.03377,0.16940,0.38069,0.61931,0.83060,0.96623};
G4double wgi[]={0.08566,0.18038,0.23396,0.23396,0.18038,0.08566};
G4double loss = 0.;
G4double vcut = cut/totalEnergy;
G4double vmax = tkin/totalEnergy;
G4double aaa = 0.;
G4double bbb = vcut;
if(vcut>vmax) bbb=vmax ;
if(vcut>vmax) bbb=vmax ;
G4int kkk = (G4int)((bbb-aaa)/ak1)+k2 ;
G4double hhh=(bbb-aaa)/float(kkk) ;
@@ -193,7 +222,7 @@ G4double G4MuBremsstrahlungModel::ComputMuBremLoss(G4double Z, G4double A,
G4double G4MuBremsstrahlungModel::ComputeMicroscopicCrossSection(
G4double tkin,
G4double Z,
G4double A,
G4double A,
G4double cut)
{
G4double totalEnergy = (G4MuonPlus::MuonPlus())->GetPDGMass() + tkin;
@@ -203,8 +232,8 @@ G4double G4MuBremsstrahlungModel::ComputeMicroscopicCrossSection(
G4double wgi[]={0.08566,0.18038,0.23396,0.23396,0.18038,0.08566};
G4double cross = 0.;
if(cut >= tkin) return cross;
if(cut >= tkin) return cross;
G4double vcut = cut/totalEnergy;
G4double vmax = tkin/totalEnergy;
@@ -235,12 +264,12 @@ G4double G4MuBremsstrahlungModel::ComputeMicroscopicCrossSection(
G4double G4MuBremsstrahlungModel::ComputeDMicroscopicCrossSection(
G4double tkin,
G4double Z,
G4double A,
G4double A,
G4double gammaEnergy)
// differential cross section
{
G4double particleMass = (G4MuonPlus::MuonPlus())->GetPDGMass();
static const G4double sqrte=sqrt(exp(1.)) ;
static const G4double bh=202.4,bh1=446.,btf=183.,btf1=1429. ;
static const G4double rmass=particleMass/electron_mass_c2 ;
@@ -272,7 +301,7 @@ G4double G4MuBremsstrahlungModel::ComputeDMicroscopicCrossSection(
b=btf;
b1=btf1;
dnstar = exp((1.-1./Z)*log(dn)) ;
}
}
// nucleus contribution logarithm
G4double rab1=b*z13;
@@ -280,7 +309,7 @@ G4double G4MuBremsstrahlungModel::ComputeDMicroscopicCrossSection(
(particleMass+delta*(dnstar*sqrte-2.))) ;
if(fn <0.) fn = 0. ;
// electron contribution logarithm
G4double epmax1=E/(1.+0.5*particleMass*rmass/E) ;
G4double epmax1=E/(1.+0.5*particleMass*rmass/E) ;
G4double fe=0.;
if(gammaEnergy<epmax1)
{
@@ -289,7 +318,7 @@ G4double G4MuBremsstrahlungModel::ComputeDMicroscopicCrossSection(
(electron_mass_c2+rab0*rab2))) ;
if(fe<0.) fe=0. ;
}
dxsection = coeff*(1.-v*(1. - 0.75*v))*Z*(fn*Z + fe)/gammaEnergy;
return dxsection;
@@ -298,80 +327,62 @@ G4double G4MuBremsstrahlungModel::ComputeDMicroscopicCrossSection(
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4MuBremsstrahlungModel::CrossSection(const G4Material* material,
const G4ParticleDefinition* p,
const G4ParticleDefinition*,
G4double kineticEnergy,
G4double cutEnergy,
G4double maxEnergy)
G4double maxEnergy)
{
G4double cross = 0.0;
G4double tmax = G4std::min(maxEnergy, kineticEnergy);
G4double cut = G4std::max(cutEnergy, minThreshold);
G4double cut = cutEnergy;
if(cut >= tmax) return cross;
if(!samplingTablesAreFilled) MakeSamplingTables();
const G4ElementVector* theElementVector = material->GetElementVector() ;
const G4double* theAtomNumDensityVector = material->GetAtomicNumDensityVector();
if(material != oldMaterial) {
oldMaterial = material;
G4double fixedEnergy = sqrt(lowKinEnergy*highKinEnergy);
ComputePartialSumSigma(material, fixedEnergy, cutEnergy);
}
for (size_t i=0; i<material->GetNumberOfElements(); i++) {
G4double Z = (*theElementVector)[i]->GetZ();
G4double A = (*theElementVector)[i]->GetA()/(g/mole) ;
G4double cr = ComputeMicroscopicCrossSection(kineticEnergy, Z, A, cut);
if(tmax < kineticEnergy) {
cr -= ComputeMicroscopicCrossSection(kineticEnergy, Z, A, tmax);
}
cross += theAtomNumDensityVector[i] * cr;
}
cross += theAtomNumDensityVector[i] * cr;
}
return cross;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4MuBremsstrahlungModel::ComputePartialSumSigma(const G4Material* material,
G4double kineticEnergy,
G4double cut)
G4DataVector* G4MuBremsstrahlungModel::ComputePartialSumSigma(
const G4Material* material,
G4double kineticEnergy,
G4double cut)
// Build the table of cross section per element. The table is built for MATERIALS.
// This table is used by DoIt to select randomly an element in the material.
// This table is used by DoIt to select randomly an element in the material.
{
size_t index = material->GetIndex();
G4int nElements = material->GetNumberOfElements();
const G4ElementVector* theElementVector = material->GetElementVector();
const G4ElementVector* theElementVector = material->GetElementVector();
const G4double* theAtomNumDensityVector = material->GetAtomicNumDensityVector();
G4DataVector* dv;
if (index >= partialSumSigma.size()) {
dv = new G4DataVector();
partialSumSigma.push_back(dv);
} else {
dv = partialSumSigma[index];
dv->clear();
if(0 == index) samplingTablesAreFilled = false;
}
G4DataVector* dv = new G4DataVector();
G4double cross = 0.0;
for (G4int i=0; i<nElements; i++ ) {
G4double Z = (*theElementVector)[i]->GetZ();
G4double A = (*theElementVector)[i]->GetA()/(g/mole) ;
cross += theAtomNumDensityVector[i] * ComputeMicroscopicCrossSection(kineticEnergy,
Z, A, cut);
dv->push_back(cross);
}
return dv;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -422,7 +433,7 @@ void G4MuBremsstrahlungModel::MakeSamplingTables()
AtomicWeight,ep) ;
ya[i]=y ;
proba[iz][it][i] = CrossSection ;
}
proba[iz][it][NBIN] = CrossSection ;
@@ -442,35 +453,35 @@ void G4MuBremsstrahlungModel::MakeSamplingTables()
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4std::vector<G4DynamicParticle*>* G4MuBremsstrahlungModel::SampleSecondary(
const G4Material* material,
G4DynamicParticle* G4MuBremsstrahlungModel::SampleSecondary(
const G4MaterialCutsCouple* couple,
const G4DynamicParticle* dp,
G4double tmin,
G4double maxEnergy)
G4double maxEnergy)
{
G4double kineticEnergy = dp->GetKineticEnergy();
// check against insufficient energy
if(tmin >= maxEnergy) return 0;
G4double tmax = G4std::min(kineticEnergy, maxEnergy);
if(tmin >= tmax) return 0;
static G4double ysmall = -100. ;
static G4double ytablelow = -5. ;
G4double kineticEnergy = dp->GetKineticEnergy();
G4ParticleMomentum ParticleDirection = dp->GetMomentumDirection();
// select randomly one element constituing the material
const G4Element* anElement = SelectRandomAtom(material);
// select randomly one element constituing the material
const G4Element* anElement = SelectRandomAtom(couple);
G4double totalEnergy = kineticEnergy + dp->GetMass();
G4double dy = 5./G4float(NBIN);
// This sampling should be checked!!! VI
G4double ymin=log(log(tmin/cutFixed)/log(maxEnergy/cutFixed));
G4double ymin=log(log(tmin/cutFixed)/log(tmax/cutFixed));
if(ymin < ysmall) return 0;
// sampling using tables
// sampling using tables
G4double v,x,y ;
G4int iy;
@@ -495,41 +506,43 @@ G4std::vector<G4DynamicParticle*>* G4MuBremsstrahlungModel::SampleSecondary(
delmin = 1.e10 ;
for (G4int it=0; it<ntdat; it++)
{
del = abs(log(maxEnergy)-log(tdat[it])) ;
del = abs(log(tmax)-log(tdat[it])) ;
if(del<delmin)
{
delmin=del;
itt=it ;
}
}
G4int iymin = G4int((ymin+5.)/dy+0.5) ;
G4int iymin = G4int((ymin+5.)/dy+0.5) ;
if(ymin < ytablelow)
{
y = ymin + G4UniformRand()*(ytablelow-ymin) ;
}
else
{
G4double r = G4UniformRand() ;
do {
if(ymin < ytablelow)
{
y = ymin + G4UniformRand()*(ytablelow-ymin) ;
}
else
{
G4double r = G4UniformRand() ;
iy = iymin-1 ;
delmin = proba[izz][itt][NBINminus1]-proba[izz][itt][iymin] ;
do {
iy = iymin-1 ;
delmin = proba[izz][itt][NBINminus1]-proba[izz][itt][iymin] ;
do {
iy += 1 ;
} while ((r > (proba[izz][itt][iy]-proba[izz][itt][iymin])/delmin)
} while ((r > (proba[izz][itt][iy]-proba[izz][itt][iymin])/delmin)
&&(iy < NBINminus1)) ;
//sampling is Done uniformly in y in the bin
y = ya[iy] + G4UniformRand() * ( ya[iy+1] - ya[iy] ) ;
}
//sampling is Done uniformly in y in the bin
y = ya[iy] + G4UniformRand() * ( ya[iy+1] - ya[iy] ) ;
}
x = exp(y) ;
x = exp(y) ;
v = cutFixed*exp(x*log(maxEnergy/cutFixed)) ;
if( v <= 0.) return 0;
v = cutFixed*exp(x*log(tmax/cutFixed)) ;
} while ( v <= 0.);
// create G4DynamicParticle object for the Gamma
G4double GammaEnergy = v;
// create G4DynamicParticle object for the Gamma
G4double GammaEnergy = v;
// angles of the emitted gamma. ( Z - axis along the parent particle)
// Teta = electron_mass_c2/TotalEnergy for the moment .....
@@ -540,14 +553,26 @@ G4std::vector<G4DynamicParticle*>* G4MuBremsstrahlungModel::SampleSecondary(
dirz = cos(Teta) ;
G4ThreeVector GammaDirection ( dirx, diry, dirz);
GammaDirection.rotateUz(ParticleDirection);
GammaDirection.rotateUz(ParticleDirection);
G4DynamicParticle* aGamma = new G4DynamicParticle();
aGamma->SetDefinition(G4Gamma::Gamma());
aGamma->SetKineticEnergy(GammaEnergy);
aGamma->SetMomentumDirection(GammaDirection);
return aGamma;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4std::vector<G4DynamicParticle*>* G4MuBremsstrahlungModel::SampleSecondaries(
const G4MaterialCutsCouple* couple,
const G4DynamicParticle* dp,
G4double tmin,
G4double maxEnergy)
{
G4std::vector<G4DynamicParticle*>* vdp = new G4std::vector<G4DynamicParticle*>;
G4DynamicParticle* aGamma = SampleSecondary(couple,dp,tmin,maxEnergy);
vdp->push_back(aGamma);
return vdp;
@@ -556,16 +581,17 @@ G4std::vector<G4DynamicParticle*>* G4MuBremsstrahlungModel::SampleSecondary(
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
const G4Element* G4MuBremsstrahlungModel::SelectRandomAtom(
const G4Material* material) const
const G4MaterialCutsCouple* couple) const
{
// select randomly 1 element within the material
const G4Material* material = couple->GetMaterial();
G4int nElements = material->GetNumberOfElements();
const G4ElementVector* theElementVector = material->GetElementVector();
if(1 == nElements) return (*theElementVector)[0];
else if(1 > nElements) return 0;
else if(1 > nElements) return 0;
G4DataVector* dv = partialSumSigma[material->GetIndex()];
G4DataVector* dv = partialSumSigma[couple->GetIndex()];
G4double rval = G4UniformRand()*((*dv)[nElements-1]);
for (G4int i=0; i<nElements; i++) {
if (rval <= (*dv)[i]) return (*theElementVector)[i];
@@ -574,5 +600,3 @@ const G4Element* G4MuBremsstrahlungModel::SelectRandomAtom(
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......