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This commit is contained in:
Gabriele Cosmo
2016-06-09 15:58:43 +02:00
parent 96c8bcd0af
commit b79225fb37
7544 changed files with 245407 additions and 91099 deletions
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source/processes/electromagnetic/muons/src/G4MuPairProductionModel.cc
+55 -104
View File
@@ -23,8 +23,8 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4MuPairProductionModel.cc,v 1.35 2007/10/11 13:52:04 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-01 $
// $Id: G4MuPairProductionModel.cc,v 1.39 2008/07/22 16:11:34 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-02 $
//
// -------------------------------------------------------------------
//
@@ -103,13 +103,14 @@ using namespace std;
G4MuPairProductionModel::G4MuPairProductionModel(const G4ParticleDefinition* p,
const G4String& nam)
: G4VEmModel(nam),
minPairEnergy(4.*electron_mass_c2),
lowestKinEnergy(1.*GeV),
factorForCross(4.*fine_structure_const*fine_structure_const
particle(0),
factorForCross(4.*fine_structure_const*fine_structure_const
*classic_electr_radius*classic_electr_radius/(3.*pi)),
sqrte(sqrt(exp(1.))),
currentZ(0),
particle(0),
fParticleChange(0),
minPairEnergy(4.*electron_mass_c2),
lowestKinEnergy(1.*GeV),
nzdat(5),
ntdat(8),
nbiny(1000),
@@ -117,10 +118,10 @@ G4MuPairProductionModel::G4MuPairProductionModel(const G4ParticleDefinition* p,
ymin(-5.),
ymax(0.),
dy((ymax-ymin)/nbiny),
ignoreCut(false),
samplingTablesAreFilled(false)
{
SetLowEnergyLimit(minPairEnergy);
nist = G4NistManager::Instance();
theElectron = G4Electron::Electron();
thePositron = G4Positron::Positron();
@@ -135,24 +136,6 @@ G4MuPairProductionModel::~G4MuPairProductionModel()
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4double G4MuPairProductionModel::MinEnergyCut(const G4ParticleDefinition*,
const G4MaterialCutsCouple* )
{
return minPairEnergy;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4MuPairProductionModel::SetParticle(const G4ParticleDefinition* p)
{
if(!particle) {
particle = p;
particleMass = particle->GetPDGMass();
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4MuPairProductionModel::Initialise(const G4ParticleDefinition* p,
const G4DataVector&)
{
@@ -160,19 +143,12 @@ void G4MuPairProductionModel::Initialise(const G4ParticleDefinition* p,
if(p) SetParticle(p);
MakeSamplingTables();
}
if(pParticleChange) {
if(ignoreCut) {
gParticleChange =
reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange);
fParticleChange = 0;
} else {
if(!fParticleChange) {
if(pParticleChange)
fParticleChange =
reinterpret_cast<G4ParticleChangeForLoss*>(pParticleChange);
gParticleChange = 0;
}
} else {
fParticleChange = new G4ParticleChangeForLoss();
gParticleChange = 0;
else
fParticleChange = new G4ParticleChangeForLoss();
}
}
@@ -185,8 +161,7 @@ G4double G4MuPairProductionModel::ComputeDEDXPerVolume(
G4double cutEnergy)
{
G4double dedx = 0.0;
if (cutEnergy <= minPairEnergy || kineticEnergy <= lowestKinEnergy
|| ignoreCut)
if (cutEnergy <= minPairEnergy || kineticEnergy <= lowestKinEnergy)
return dedx;
const G4ElementVector* theElementVector = material->GetElementVector();
@@ -215,7 +190,7 @@ G4double G4MuPairProductionModel::ComputMuPairLoss(G4double Z,
SetCurrentElement(Z);
G4double loss = 0.0;
G4double cut = min(cutEnergy,tmax);
G4double cut = std::min(cutEnergy,tmax);
if(cut <= minPairEnergy) return loss;
// calculate the rectricted loss
@@ -250,13 +225,10 @@ G4double G4MuPairProductionModel::ComputeMicroscopicCrossSection(
G4double tkin,
G4double Z,
G4double cut)
{
G4double cross = 0. ;
G4double cross = 0.;
SetCurrentElement(Z);
G4double tmax = MaxSecondaryEnergy(particle, tkin);
if (tmax <= cut) return cross;
G4double ak1=6.9 ;
@@ -399,44 +371,20 @@ G4double G4MuPairProductionModel::ComputeCrossSectionPerAtom(
G4double kineticEnergy,
G4double Z, G4double,
G4double cutEnergy,
G4double)
{
G4double cut = max(minPairEnergy,cutEnergy);
if(ignoreCut) cut = minPairEnergy;
G4double cross = ComputeMicroscopicCrossSection (kineticEnergy, Z, cut);
return cross;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4double G4MuPairProductionModel::CrossSectionPerVolume(
const G4Material* material,
const G4ParticleDefinition*,
G4double kineticEnergy,
G4double cutEnergy,
G4double maxEnergy)
G4double maxEnergy)
{
G4double cross = 0.0;
if (kineticEnergy <= lowestKinEnergy) return cross;
maxEnergy += particleMass;
SetCurrentElement(Z);
G4double tmax = std::min(maxEnergy, kineticEnergy);
G4double cut = std::min(cutEnergy, kineticEnergy);
if(cut < minPairEnergy) cut = minPairEnergy;
if (cut >= tmax) return cross;
const G4ElementVector* theElementVector = material->GetElementVector();
const G4double* theAtomNumDensityVector = material->
GetAtomicNumDensityVector();
for (size_t i=0; i<material->GetNumberOfElements(); i++) {
G4double Z = (*theElementVector)[i]->GetZ();
SetCurrentElement(Z);
G4double tmax = min(maxEnergy,MaxSecondaryEnergy(particle, kineticEnergy));
G4double cut = max(minPairEnergy,cutEnergy);
if(ignoreCut) cut = minPairEnergy;
if(cut < tmax) {
G4double cr = ComputeMicroscopicCrossSection(kineticEnergy, Z, cut)
- ComputeMicroscopicCrossSection(kineticEnergy, Z, tmax);
cross += theAtomNumDensityVector[i] * cr;
}
cross = ComputeMicroscopicCrossSection (kineticEnergy, Z, cut);
if(tmax < kineticEnergy) {
cross -= ComputeMicroscopicCrossSection(kineticEnergy, Z, tmax);
}
return cross;
}
@@ -450,37 +398,44 @@ void G4MuPairProductionModel::MakeSamplingTables()
G4double Z = zdat[iz];
SetCurrentElement(Z);
for (G4int it=0; it<ntdat; it++)
{
for (G4int it=0; it<ntdat; it++) {
G4double kineticEnergy = tdat[it];
G4double maxPairEnergy = MaxSecondaryEnergy(particle,kineticEnergy);
// G4cout << "Z= " << currentZ << " z13= " << z13
//<< " mE= " << maxPairEnergy << G4endl;
G4double CrossSection = 0.0 ;
G4double y = ymin - 0.5*dy ;
G4double yy = ymin - dy ;
G4double x = exp(y);
G4double fac = exp(dy);
G4double dx = exp(yy)*(fac - 1.0);
if(maxPairEnergy > minPairEnergy) {
G4double c = log(maxPairEnergy/minPairEnergy);
G4double y = ymin - 0.5*dy ;
G4double yy = ymin - dy ;
G4double x = exp(y);
G4double fac = exp(dy);
G4double dx = exp(yy)*(fac - 1.0);
for (G4int i=0 ; i<nbiny; i++)
{
y += dy ;
if(c > 0.0) {
x *= fac;
dx*= fac;
G4double ep = minPairEnergy*exp(c*x) ;
CrossSection += ep*dx*ComputeDMicroscopicCrossSection(
kineticEnergy, Z, ep);
}
ya[i] = y;
proba[iz][it][i] = CrossSection;
G4double c = log(maxPairEnergy/minPairEnergy);
for (G4int i=0 ; i<nbiny; i++) {
y += dy ;
if(c > 0.0) {
x *= fac;
dx*= fac;
G4double ep = minPairEnergy*exp(c*x) ;
CrossSection +=
ep*dx*ComputeDMicroscopicCrossSection(kineticEnergy, Z, ep);
}
ya[i] = y;
proba[iz][it][i] = CrossSection;
}
} else {
for (G4int i=0 ; i<nbiny; i++) {
proba[iz][it][i] = CrossSection;
}
}
ya[nbiny]=ymax;
proba[iz][it][nbiny] = CrossSection;
}
@@ -514,7 +469,7 @@ void G4MuPairProductionModel::SampleSecondaries(std::vector<G4DynamicParticle*>*
G4double maxPairEnergy = MaxSecondaryEnergy(particle,kineticEnergy);
G4double maxEnergy = std::min(tmax, maxPairEnergy);
G4double minEnergy = std::max(tmin, minPairEnergy);
if(ignoreCut)minEnergy = minPairEnergy;
if(minEnergy >= maxEnergy) return;
//G4cout << "emin= " << minEnergy << " emax= " << maxEnergy
// << " minPair= " << minPairEnergy << " maxpair= " << maxPairEnergy
@@ -617,10 +572,7 @@ void G4MuPairProductionModel::SampleSecondaries(std::vector<G4DynamicParticle*>*
// primary change
kineticEnergy -= (ElectronEnergy + PositronEnergy);
if(fParticleChange)
fParticleChange->SetProposedKineticEnergy(kineticEnergy);
else
gParticleChange->SetProposedKineticEnergy(kineticEnergy);
fParticleChange->SetProposedKineticEnergy(kineticEnergy);
vdp->push_back(aParticle1);
vdp->push_back(aParticle2);
@@ -654,7 +606,6 @@ const G4Element* G4MuPairProductionModel::SelectRandomAtom(
SetCurrentElement(Z);
G4double maxPairEnergy = MaxSecondaryEnergy(particle,kinEnergy);
G4double minEnergy = std::max(tmin, minPairEnergy);
if(ignoreCut)minEnergy = minPairEnergy;
G4int iz;
for(iz=1; iz<nzdat; iz++) {if(Z <= zdat[iz]) break;}