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This commit is contained in:
Gabriele Cosmo
2016-06-10 14:11:04 +02:00
parent c9b32a6c0a
commit d4af681f38
4886 changed files with 420149 additions and 1023309 deletions
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source/processes/electromagnetic/lowenergy/src/G4LivermoreNuclearGammaConversionModel.cc
+268 -122
View File
@@ -23,14 +23,16 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4LivermoreNuclearGammaConversionModel.cc 66241 2012-12-13 18:34:42Z gunter $
//
// Authors: G.Depaola & F.Longo
//
// Author: Sebastien Incerti
// 22 January 2012
// on base of G4LivermoreNuclearGammaConversionModel (original version)
// and G4LivermoreRayleighModel (MT version)
#include "G4LivermoreNuclearGammaConversionModel.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
#include "G4Log.hh"
#include "G4Exp.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -38,108 +40,234 @@ using namespace std;
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4LivermoreNuclearGammaConversionModel::G4LivermoreNuclearGammaConversionModel(const G4ParticleDefinition*,
const G4String& nam)
:G4VEmModel(nam),fParticleChange(0),smallEnergy(2.*MeV),
isInitialised(false),
crossSectionHandler(0),meanFreePathTable(0)
G4int G4LivermoreNuclearGammaConversionModel::maxZ = 100;
G4LPhysicsFreeVector* G4LivermoreNuclearGammaConversionModel::data[] = {0};
G4LivermoreNuclearGammaConversionModel::G4LivermoreNuclearGammaConversionModel
(const G4ParticleDefinition*, const G4String& nam)
:G4VEmModel(nam),isInitialised(false),smallEnergy(2.*MeV)
{
fParticleChange = 0;
lowEnergyLimit = 2.0*electron_mass_c2;
highEnergyLimit = 100 * GeV;
SetHighEnergyLimit(highEnergyLimit);
verboseLevel= 0;
// Verbosity scale:
// Verbosity scale for debugging purposes:
// 0 = nothing
// 1 = warning for energy non-conservation
// 2 = details of energy budget
// 3 = calculation of cross sections, file openings, sampling of atoms
// 4 = entering in methods
// 1 = calculation of cross sections, file openings...
// 2 = entering in methods
if(verboseLevel > 0) {
G4cout << "Livermore Nuclear Gamma conversion is constructed " << G4endl
<< "Energy range: "
<< lowEnergyLimit / MeV << " MeV - "
<< highEnergyLimit / GeV << " GeV"
<< G4endl;
if(verboseLevel > 0)
{
G4cout << "G4LivermoreNuclearGammaConversionModel is constructed " << G4endl;
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4LivermoreNuclearGammaConversionModel::~G4LivermoreNuclearGammaConversionModel()
{
if (crossSectionHandler) delete crossSectionHandler;
{
if(IsMaster()) {
for(G4int i=0; i<maxZ; ++i) {
if(data[i]) {
delete data[i];
data[i] = 0;
}
}
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void
G4LivermoreNuclearGammaConversionModel::Initialise(const G4ParticleDefinition*,
const G4DataVector&)
void G4LivermoreNuclearGammaConversionModel::Initialise(
const G4ParticleDefinition* particle,
const G4DataVector& cuts)
{
if (verboseLevel > 3)
G4cout << "Calling G4LivermoreNuclearGammaConversionModel::Initialise()" << G4endl;
if (crossSectionHandler)
if (verboseLevel > 1)
{
crossSectionHandler->Clear();
delete crossSectionHandler;
}
// Read data tables for all materials
crossSectionHandler = new G4CrossSectionHandler();
crossSectionHandler->Initialise(0,lowEnergyLimit,100.*GeV,400);
G4String crossSectionFile = "pairdata/pp-pair-cs-"; // here only pair in nuclear field cs should be used
crossSectionHandler->LoadData(crossSectionFile);
//
if (verboseLevel > 0) {
G4cout << "Loaded cross section files for Livermore GammaConversion" << G4endl;
G4cout << "To obtain the total cross section this should be used only " << G4endl
<< "in connection with G4ElectronGammaConversion " << G4endl;
}
if (verboseLevel > 0) {
G4cout << "Livermore Nuclear Gamma Conversion model is initialized " << G4endl
G4cout << "Calling Initialise() of G4LivermoreNuclearGammaConversionModel."
<< G4endl
<< "Energy range: "
<< LowEnergyLimit() / MeV << " MeV - "
<< HighEnergyLimit() / GeV << " GeV"
<< G4endl;
}
if(isInitialised) return;
if(IsMaster())
{
// Initialise element selector
InitialiseElementSelectors(particle, cuts);
// Access to elements
char* path = getenv("G4LEDATA");
G4ProductionCutsTable* theCoupleTable =
G4ProductionCutsTable::GetProductionCutsTable();
G4int numOfCouples = theCoupleTable->GetTableSize();
for(G4int i=0; i<numOfCouples; ++i)
{
const G4Material* material =
theCoupleTable->GetMaterialCutsCouple(i)->GetMaterial();
const G4ElementVector* theElementVector = material->GetElementVector();
G4int nelm = material->GetNumberOfElements();
for (G4int j=0; j<nelm; ++j)
{
G4int Z = (G4int)(*theElementVector)[j]->GetZ();
if(Z < 1) { Z = 1; }
else if(Z > maxZ) { Z = maxZ; }
if(!data[Z]) { ReadData(Z, path); }
}
}
}
if(isInitialised) { return; }
fParticleChange = GetParticleChangeForGamma();
isInitialised = true;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4LivermoreNuclearGammaConversionModel::InitialiseLocal(
const G4ParticleDefinition*, G4VEmModel* masterModel)
{
SetElementSelectors(masterModel->GetElementSelectors());
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double
G4LivermoreNuclearGammaConversionModel::MinPrimaryEnergy(const G4Material*,
const G4ParticleDefinition*,
G4double)
{
return lowEnergyLimit;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4LivermoreNuclearGammaConversionModel::ReadData(size_t Z, const char* path)
{
if (verboseLevel > 1)
{
G4cout << "Calling ReadData() of G4LivermoreNuclearGammaConversionModel"
<< G4endl;
}
if(data[Z]) { return; }
const char* datadir = path;
if(!datadir)
{
datadir = getenv("G4LEDATA");
if(!datadir)
{
G4Exception("G4LivermoreNuclearGammaConversionModel::ReadData()",
"em0006",FatalException,
"Environment variable G4LEDATA not defined");
return;
}
}
//
data[Z] = new G4LPhysicsFreeVector();
//
std::ostringstream ost;
ost << datadir << "livermore/pairdata/pp-pair-cs-" << Z <<".dat";
std::ifstream fin(ost.str().c_str());
if( !fin.is_open())
{
G4ExceptionDescription ed;
ed << "G4LivermoreNuclearGammaConversionModel data file <" << ost.str().c_str()
<< "> is not opened!" << G4endl;
G4Exception("G4LivermoreNuclearGammaConversionModel::ReadData()",
"em0003",FatalException,
ed,"G4LEDATA version should be G4EMLOW6.27 or later.");
return;
}
else
{
if(verboseLevel > 3) { G4cout << "File " << ost.str()
<< " is opened by G4LivermoreNuclearGammaConversionModel" << G4endl;}
data[Z]->Retrieve(fin, true);
}
// Activation of spline interpolation
data[Z] ->SetSpline(true);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double
G4LivermoreNuclearGammaConversionModel::ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
G4double GammaEnergy,
G4double Z, G4double,
G4double, G4double)
{
if (verboseLevel > 3) {
if (verboseLevel > 1)
{
G4cout << "Calling ComputeCrossSectionPerAtom() of G4LivermoreNuclearGammaConversionModel"
<< G4endl;
}
if (GammaEnergy < lowEnergyLimit || GammaEnergy > highEnergyLimit) return 0;
if (GammaEnergy < lowEnergyLimit) { return 0.0; }
G4double xs = 0.0;
G4int intZ=G4int(Z);
if(intZ < 1 || intZ > maxZ) { return xs; }
G4LPhysicsFreeVector* pv = data[intZ];
// if element was not initialised
// do initialisation safely for MT mode
if(!pv)
{
InitialiseForElement(0, intZ);
pv = data[intZ];
if(!pv) { return xs; }
}
// x-section is taken from the table
xs = pv->Value(GammaEnergy);
if(verboseLevel > 0)
{
G4int n = pv->GetVectorLength() - 1;
G4cout << "****** DEBUG: tcs value for Z=" << Z << " at energy (MeV)="
<< GammaEnergy/MeV << G4endl;
G4cout << " cs (Geant4 internal unit)=" << xs << G4endl;
G4cout << " -> first cs value in EADL data file (iu) =" << (*pv)[0] << G4endl;
G4cout << " -> last cs value in EADL data file (iu) =" << (*pv)[n] << G4endl;
G4cout << "*********************************************************" << G4endl;
}
return xs;
G4double cs = crossSectionHandler->FindValue(G4int(Z), GammaEnergy);
return cs;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4LivermoreNuclearGammaConversionModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
const G4MaterialCutsCouple* couple,
const G4DynamicParticle* aDynamicGamma,
G4double,
G4double)
void G4LivermoreNuclearGammaConversionModel::SampleSecondaries(
std::vector<G4DynamicParticle*>* fvect,
const G4MaterialCutsCouple* couple,
const G4DynamicParticle* aDynamicGamma,
G4double, G4double)
{
// The energies of the e+ e- secondaries are sampled using the Bethe - Heitler
@@ -152,8 +280,10 @@ void G4LivermoreNuclearGammaConversionModel::SampleSecondaries(std::vector<G4Dyn
// pair creation in both nuclear and atomic electron fields. However triplet
// prodution is not generated.
if (verboseLevel > 3)
G4cout << "Calling SampleSecondaries() of G4LivermoreNuclearGammaConversionModel" << G4endl;
if (verboseLevel > 1) {
G4cout << "Calling SampleSecondaries() of G4LivermoreNuclearGammaConversionModel"
<< G4endl;
}
G4double photonEnergy = aDynamicGamma->GetKineticEnergy();
G4ParticleMomentum photonDirection = aDynamicGamma->GetMomentumDirection();
@@ -163,57 +293,58 @@ void G4LivermoreNuclearGammaConversionModel::SampleSecondaries(std::vector<G4Dyn
// Do it fast if photon energy < 2. MeV
if (photonEnergy < smallEnergy )
{
epsilon = epsilon0Local + (0.5 - epsilon0Local) * G4UniformRand();
}
{
epsilon = epsilon0Local + (0.5 - epsilon0Local) * G4UniformRand();
}
else
{
// Select randomly one element in the current material
//const G4Element* element = crossSectionHandler->SelectRandomElement(couple,photonEnergy);
const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
const G4Element* element = SelectRandomAtom(couple,particle,photonEnergy);
{
// Select randomly one element in the current material
if (element == 0)
{
G4cout << "G4LivermoreNuclearGammaConversionModel::SampleSecondaries - element = 0"
<< G4endl;
return;
}
G4IonisParamElm* ionisation = element->GetIonisation();
if (ionisation == 0)
{
G4cout << "G4LivermoreNuclearGammaConversionModel::SampleSecondaries - ionisation = 0"
<< G4endl;
return;
}
const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
const G4Element* element = SelectRandomAtom(couple,particle,photonEnergy);
// Extract Coulomb factor for this Element
G4double fZ = 8. * (ionisation->GetlogZ3());
if (photonEnergy > 50. * MeV) fZ += 8. * (element->GetfCoulomb());
if (element == 0)
{
G4cout << "G4LivermoreNuclearGammaConversionModel::SampleSecondaries - element = 0"
<< G4endl;
return;
}
G4IonisParamElm* ionisation = element->GetIonisation();
if (ionisation == 0)
{
G4cout << "G4LivermoreNuclearGammaConversionModel::SampleSecondaries - ionisation = 0"
<< G4endl;
return;
}
// Limits of the screening variable
G4double screenFactor = 136. * epsilon0Local / (element->GetIonisation()->GetZ3()) ;
G4double screenMax = std::exp ((42.24 - fZ)/8.368) - 0.952 ;
G4double screenMin = std::min(4.*screenFactor,screenMax) ;
// Extract Coulomb factor for this Elements
G4double fZ = 8. * (ionisation->GetlogZ3());
if (photonEnergy > 50. * MeV) fZ += 8. * (element->GetfCoulomb());
// Limits of the energy sampling
G4double epsilon1 = 0.5 - 0.5 * std::sqrt(1. - screenMin / screenMax) ;
G4double epsilonMin = std::max(epsilon0Local,epsilon1);
G4double epsilonRange = 0.5 - epsilonMin ;
// Limits of the screening variable
G4double screenFactor = 136. * epsilon0Local / (element->GetIonisation()->GetZ3()) ;
G4double screenMax = G4Exp ((42.24 - fZ)/8.368) - 0.952 ;
G4double screenMin = std::min(4.*screenFactor,screenMax) ;
// Sample the energy rate of the created electron (or positron)
G4double screen;
G4double gReject ;
// Limits of the energy sampling
G4double epsilon1 = 0.5 - 0.5 * std::sqrt(1. - screenMin / screenMax) ;
G4double epsilonMin = std::max(epsilon0Local,epsilon1);
G4double epsilonRange = 0.5 - epsilonMin ;
G4double f10 = ScreenFunction1(screenMin) - fZ;
G4double f20 = ScreenFunction2(screenMin) - fZ;
G4double normF1 = std::max(f10 * epsilonRange * epsilonRange,0.);
G4double normF2 = std::max(1.5 * f20,0.);
// Sample the energy rate of the created electron (or positron)
G4double screen;
G4double gReject ;
do {
G4double f10 = ScreenFunction1(screenMin) - fZ;
G4double f20 = ScreenFunction2(screenMin) - fZ;
G4double normF1 = std::max(f10 * epsilonRange * epsilonRange,0.);
G4double normF2 = std::max(1.5 * f20,0.);
do
{
if (normF1 / (normF1 + normF2) > G4UniformRand() )
{
epsilon = 0.5 - epsilonRange * std::pow(G4UniformRand(), 0.3333) ;
epsilon = 0.5 - epsilonRange * std::pow(G4UniformRand(), 0.333333) ;
screen = screenFactor / (epsilon * (1. - epsilon));
gReject = (ScreenFunction1(screen) - fZ) / f10 ;
}
@@ -224,15 +355,15 @@ void G4LivermoreNuclearGammaConversionModel::SampleSecondaries(std::vector<G4Dyn
gReject = (ScreenFunction2(screen) - fZ) / f20 ;
}
} while ( gReject < G4UniformRand() );
} // End of epsilon sampling
} // End of epsilon sampling
// Fix charges randomly
G4double electronTotEnergy;
G4double positronTotEnergy;
if (G4int(2*G4UniformRand()))
if (G4UniformRand() > 0.5)
{
electronTotEnergy = (1. - epsilon) * photonEnergy;
positronTotEnergy = epsilon * photonEnergy;
@@ -255,11 +386,11 @@ void G4LivermoreNuclearGammaConversionModel::SampleSecondaries(std::vector<G4Dyn
// if (9. / (9. + d) > G4UniformRand())
if (0.25 > G4UniformRand())
{
u = - std::log(G4UniformRand() * G4UniformRand()) / a1 ;
u = - G4Log(G4UniformRand() * G4UniformRand()) / a1 ;
}
else
{
u = - std::log(G4UniformRand() * G4UniformRand()) / a2 ;
u = - G4Log(G4UniformRand() * G4UniformRand()) / a2 ;
}
G4double thetaEle = u*electron_mass_c2/electronTotEnergy;
@@ -276,28 +407,24 @@ void G4LivermoreNuclearGammaConversionModel::SampleSecondaries(std::vector<G4Dyn
G4double electronKineEnergy = std::max(0.,electronTotEnergy - electron_mass_c2) ;
// SI - The range test has been removed wrt original G4LowEnergyGammaconversion class
G4ThreeVector electronDirection (dxEle, dyEle, dzEle);
electronDirection.rotateUz(photonDirection);
G4DynamicParticle* particle1 = new G4DynamicParticle (G4Electron::Electron(),
electronDirection,
electronKineEnergy);
electronDirection,
electronKineEnergy);
// The e+ is always created (even with kinetic energy = 0) for further annihilation
// The e+ is always created
G4double positronKineEnergy = std::max(0.,positronTotEnergy - electron_mass_c2) ;
// SI - The range test has been removed wrt original G4LowEnergyGammaconversion class
G4ThreeVector positronDirection (dxPos, dyPos, dzPos);
positronDirection.rotateUz(photonDirection);
// Create G4DynamicParticle object for the particle2
G4DynamicParticle* particle2 = new G4DynamicParticle(G4Positron::Positron(),
positronDirection, positronKineEnergy);
positronDirection,
positronKineEnergy);
// Fill output vector
fvect->push_back(particle1);
fvect->push_back(particle2);
@@ -309,14 +436,15 @@ void G4LivermoreNuclearGammaConversionModel::SampleSecondaries(std::vector<G4Dyn
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4LivermoreNuclearGammaConversionModel::ScreenFunction1(G4double screenVariable)
G4double
G4LivermoreNuclearGammaConversionModel::ScreenFunction1(G4double screenVariable)
{
// Compute the value of the screening function 3*phi1 - phi2
G4double value;
if (screenVariable > 1.)
value = 42.24 - 8.368 * std::log(screenVariable + 0.952);
value = 42.24 - 8.368 * G4Log(screenVariable + 0.952);
else
value = 42.392 - screenVariable * (7.796 - 1.961 * screenVariable);
@@ -325,17 +453,35 @@ G4double G4LivermoreNuclearGammaConversionModel::ScreenFunction1(G4double screen
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4LivermoreNuclearGammaConversionModel::ScreenFunction2(G4double screenVariable)
G4double
G4LivermoreNuclearGammaConversionModel::ScreenFunction2(G4double screenVariable)
{
// Compute the value of the screening function 1.5*phi1 - 0.5*phi2
G4double value;
if (screenVariable > 1.)
value = 42.24 - 8.368 * std::log(screenVariable + 0.952);
value = 42.24 - 8.368 * G4Log(screenVariable + 0.952);
else
value = 41.405 - screenVariable * (5.828 - 0.8945 * screenVariable);
return value;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
#include "G4AutoLock.hh"
namespace { G4Mutex LivermoreNuclearGammaConversionModelMutex = G4MUTEX_INITIALIZER; }
void G4LivermoreNuclearGammaConversionModel::InitialiseForElement(
const G4ParticleDefinition*,
G4int Z)
{
G4AutoLock l(&LivermoreNuclearGammaConversionModelMutex);
// G4cout << "G4LivermoreNuclearGammaConversionModel::InitialiseForElement Z= "
// << Z << G4endl;
if(!data[Z]) { ReadData(Z); }
l.unlock();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......