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This commit is contained in:
Gabriele Cosmo
2016-06-30 14:12:05 +02:00
parent a654a7ab1f
commit 4ec577e5c4
2021 changed files with 100995 additions and 78277 deletions
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source/processes/electromagnetic/lowenergy/src/G4LivermoreComptonModifiedModel.cc
+42 -42
View File
@@ -23,7 +23,7 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4LivermoreComptonModifiedModel.cc 82874 2014-07-15 15:25:29Z gcosmo $
// $Id: G4LivermoreComptonModifiedModel.cc 95950 2016-03-03 10:42:48Z gcosmo $
//
//
// Author: Sebastien Incerti
@@ -33,10 +33,10 @@
// History:
// --------
// 18 Apr 2009 V Ivanchenko Cleanup initialisation and generation of secondaries:
// - apply internal high-energy limit only in constructor
// - apply internal high-energy limit only in constructor
// - do not apply low-energy limit (default is 0)
// - remove GetMeanFreePath method and table
// - added protection against numerical problem in energy sampling
// - added protection against numerical problem in energy sampling
// - use G4ElementSelector
// 26 Dec 2010 V Ivanchenko Load data tables only once to avoid memory leak
// 30 May 2011 V Ivanchenko Migration to model design for deexcitation
@@ -53,6 +53,7 @@
#include "G4CompositeEMDataSet.hh"
#include "G4LogLogInterpolation.hh"
#include "G4Gamma.hh"
#include "G4Exp.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -68,13 +69,13 @@ G4LivermoreComptonModifiedModel::G4LivermoreComptonModifiedModel(const G4Particl
{
verboseLevel=0 ;
// Verbosity scale:
// 0 = nothing
// 1 = warning for energy non-conservation
// 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
if( verboseLevel>0 )
if( verboseLevel>0 )
G4cout << "Livermore Modified Compton model is constructed " << G4endl;
//Mark this model as "applicable" for atomic deexcitation
@@ -85,7 +86,7 @@ G4LivermoreComptonModifiedModel::G4LivermoreComptonModifiedModel(const G4Particl
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4LivermoreComptonModifiedModel::~G4LivermoreComptonModifiedModel()
{
{
delete crossSectionHandler;
delete scatterFunctionData;
}
@@ -106,7 +107,7 @@ void G4LivermoreComptonModifiedModel::Initialise(const G4ParticleDefinition* par
}
delete scatterFunctionData;
// Reading of data files - all materials are read
// Reading of data files - all materials are read
crossSectionHandler = new G4CrossSectionHandler;
G4String crossSectionFile = "comp/ce-cs-";
crossSectionHandler->LoadData(crossSectionFile);
@@ -134,13 +135,13 @@ void G4LivermoreComptonModifiedModel::Initialise(const G4ParticleDefinition* par
fAtomDeexcitation = G4LossTableManager::Instance()->AtomDeexcitation();
if( verboseLevel>0 ) {
if( verboseLevel>0 ) {
G4cout << "Livermore modified Compton model is initialized " << G4endl
<< "Energy range: "
<< LowEnergyLimit() / eV << " eV - "
<< HighEnergyLimit() / GeV << " GeV"
<< G4endl;
}
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -154,10 +155,10 @@ G4double G4LivermoreComptonModifiedModel::ComputeCrossSectionPerAtom(
if (verboseLevel > 3) {
G4cout << "Calling ComputeCrossSectionPerAtom() of G4LivermoreComptonModifiedModel" << G4endl;
}
if (GammaEnergy < LowEnergyLimit())
if (GammaEnergy < LowEnergyLimit())
{ return 0.0; }
G4double cs = crossSectionHandler->FindValue(G4int(Z), GammaEnergy);
G4double cs = crossSectionHandler->FindValue(G4int(Z), GammaEnergy);
return cs;
}
@@ -186,15 +187,15 @@ void G4LivermoreComptonModifiedModel::SampleSecondaries(std::vector<G4DynamicPar
G4double photonEnergy0 = aDynamicGamma->GetKineticEnergy();
if (verboseLevel > 3) {
G4cout << "G4LivermoreComptonModifiedModel::SampleSecondaries() E(MeV)= "
<< photonEnergy0/MeV << " in " << couple->GetMaterial()->GetName()
G4cout << "G4LivermoreComptonModifiedModel::SampleSecondaries() E(MeV)= "
<< photonEnergy0/MeV << " in " << couple->GetMaterial()->GetName()
<< G4endl;
}
// do nothing below the threshold
// should never get here because the XS is zero below the limit
if (photonEnergy0 < LowEnergyLimit())
return ;
if (photonEnergy0 < LowEnergyLimit())
return ;
G4double e0m = photonEnergy0 / electron_mass_c2 ;
G4ParticleMomentum photonDirection0 = aDynamicGamma->GetMomentumDirection();
@@ -217,13 +218,13 @@ void G4LivermoreComptonModifiedModel::SampleSecondaries(std::vector<G4DynamicPar
G4double oneCosT;
G4double sinT2;
G4double gReject;
do
{
if ( alpha1/(alpha1+alpha2) > G4UniformRand())
{
// std::pow(epsilon0Local,G4UniformRand())
epsilon = std::exp(-alpha1 * G4UniformRand());
epsilon = G4Exp(-alpha1 * G4UniformRand());
epsilonSq = epsilon * epsilon;
}
else
@@ -248,10 +249,10 @@ void G4LivermoreComptonModifiedModel::SampleSecondaries(std::vector<G4DynamicPar
G4double dirz = cosTheta ;
// Doppler broadening - Method based on:
// Y. Namito, S. Ban and H. Hirayama,
// "Implementation of the Doppler Broadening of a Compton-Scattered Photon
// Y. Namito, S. Ban and H. Hirayama,
// "Implementation of the Doppler Broadening of a Compton-Scattered Photon
// into the EGS4 Code", NIM A 349, pp. 489-494, 1994
// Maximum number of sampling iterations
G4int maxDopplerIterations = 1000;
G4double bindingE = 0.;
@@ -263,7 +264,7 @@ void G4LivermoreComptonModifiedModel::SampleSecondaries(std::vector<G4DynamicPar
G4int shellIdx = 0;
G4double vel_c = 299792458;
G4double momentum_au_to_nat = 1.992851740*std::pow(10.,-24.);
G4double e_mass_kg = 9.10938188 * std::pow(10.,-31.);
G4double e_mass_kg = 9.10938188 * std::pow(10.,-31.);
G4double eMax = -1;
G4double Alpha=0;
do
@@ -272,14 +273,14 @@ void G4LivermoreComptonModifiedModel::SampleSecondaries(std::vector<G4DynamicPar
// Select shell based on shell occupancy
shellIdx = shellData.SelectRandomShell(Z);
bindingE = shellData.BindingEnergy(Z,shellIdx);
// Randomly sample bound electron momentum
// Randomly sample bound electron momentum
// (memento: the data set is in Atomic Units)
G4double pSample = profileData.RandomSelectMomentum(Z,shellIdx);
// Rescale from atomic units
//Kinetic energy of target electron
@@ -289,15 +290,15 @@ void G4LivermoreComptonModifiedModel::SampleSecondaries(std::vector<G4DynamicPar
do {
Alpha = G4UniformRand()*pi/2.0;
} while(Alpha >= (pi/2.0));
ePAU = pSample / std::cos(Alpha);
// Convert to SI and the calculate electron energy in natural units
G4double ePSI = ePAU * momentum_au_to_nat;
G4double u_temp = sqrt( ((ePSI*ePSI)*(vel_c*vel_c)) / ((e_mass_kg*e_mass_kg)*(vel_c*vel_c)+(ePSI*ePSI)))/vel_c;
G4double eEIncident = electron_mass_c2 / sqrt( 1 - (u_temp*u_temp));
//Total energy of the system
systemE = eEIncident+photonEnergy0;
@@ -310,19 +311,19 @@ void G4LivermoreComptonModifiedModel::SampleSecondaries(std::vector<G4DynamicPar
G4double var = var4*var4 - var3 + pDoppler2 * var3;
if (var > 0.)
{
G4double varSqrt = std::sqrt(var);
G4double scale = photonEnergy0 / var3;
G4double varSqrt = std::sqrt(var);
G4double scale = photonEnergy0 / var3;
// Random select either root
if (G4UniformRand() < 0.5) { photonE = (var4 - varSqrt) * scale; }
if (G4UniformRand() < 0.5) { photonE = (var4 - varSqrt) * scale; }
else { photonE = (var4 + varSqrt) * scale; }
}
}
else
{
photonE = -1.;
}
} while ( iteration <= maxDopplerIterations &&
} while ( iteration <= maxDopplerIterations &&
(photonE < 0. || photonE > eMax ) );
// End of recalculation of photon energy with Doppler broadening
// Kinematics of the scattered electron
G4double eKineticEnergy = systemE - photonE - bindingE - electron_mass_c2;
@@ -376,7 +377,7 @@ void G4LivermoreComptonModifiedModel::SampleSecondaries(std::vector<G4DynamicPar
if (photonEnergy1 > 0.)
{
fParticleChange->SetProposedKineticEnergy(photonEnergy1) ;
if (iteration < maxDopplerIterations)
{
G4ThreeVector eDirection(eDirX,eDirY,eDirZ);
@@ -390,7 +391,7 @@ void G4LivermoreComptonModifiedModel::SampleSecondaries(std::vector<G4DynamicPar
{
photonEnergy1 = 0.;
fParticleChange->SetProposedKineticEnergy(0.) ;
fParticleChange->ProposeTrackStatus(fStopAndKill);
fParticleChange->ProposeTrackStatus(fStopAndKill);
}
// sample deexcitation
@@ -406,11 +407,10 @@ void G4LivermoreComptonModifiedModel::SampleSecondaries(std::vector<G4DynamicPar
if(nafter > nbefore) {
for (size_t i=nbefore; i<nafter; ++i) {
bindingE -= ((*fvect)[i])->GetKineticEnergy();
}
}
}
}
}
if(bindingE < 0.0) { bindingE = 0.0; }
fParticleChange->ProposeLocalEnergyDeposit(bindingE);
}