Gabriele Cosmo
586 lines
18 KiB
C++
586 lines
18 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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#include "G4DNADingfelderChargeIncreaseModel.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4DNAMolecularMaterial.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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using namespace std;
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4DNADingfelderChargeIncreaseModel::G4DNADingfelderChargeIncreaseModel(const G4ParticleDefinition*,
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const G4String& nam) :
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G4VEmModel(nam), isInitialised(false)
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{
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fpMolWaterDensity = 0;
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numberOfPartialCrossSections[0] = 0;
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numberOfPartialCrossSections[1] = 0;
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verboseLevel = 0;
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// Verbosity scale:
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// 0 = nothing
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// 1 = warning for energy non-conservation
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// 2 = details of energy budget
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// 3 = calculation of cross sections, file openings, sampling of atoms
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// 4 = entering in methods
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if (verboseLevel > 0)
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{
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G4cout << "Dingfelder charge increase model is constructed " << G4endl;
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}
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fParticleChangeForGamma = 0;
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// Selection of stationary mode
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statCode = false;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4DNADingfelderChargeIncreaseModel::~G4DNADingfelderChargeIncreaseModel()
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4DNADingfelderChargeIncreaseModel::Initialise(const G4ParticleDefinition* particle,
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const G4DataVector& /*cuts*/)
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{
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if (verboseLevel > 3)
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{
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G4cout << "Calling G4DNADingfelderChargeIncreaseModel::Initialise()"
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<< G4endl;
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}
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// Energy limits
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G4DNAGenericIonsManager *instance;
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instance = G4DNAGenericIonsManager::Instance();
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G4ParticleDefinition* hydrogenDef = instance->GetIon("hydrogen");
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G4ParticleDefinition* alphaPlusDef = instance->GetIon("alpha+");
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G4ParticleDefinition* heliumDef = instance->GetIon("helium");
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G4String hydrogen;
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G4String alphaPlus;
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G4String helium;
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// Limits
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hydrogen = hydrogenDef->GetParticleName();
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lowEnergyLimit[hydrogen] = 100. * eV;
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highEnergyLimit[hydrogen] = 100. * MeV;
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alphaPlus = alphaPlusDef->GetParticleName();
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lowEnergyLimit[alphaPlus] = 1. * keV;
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highEnergyLimit[alphaPlus] = 400. * MeV;
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helium = heliumDef->GetParticleName();
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lowEnergyLimit[helium] = 1. * keV;
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highEnergyLimit[helium] = 400. * MeV;
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//
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if (particle==hydrogenDef)
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{
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SetLowEnergyLimit(lowEnergyLimit[hydrogen]);
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SetHighEnergyLimit(highEnergyLimit[hydrogen]);
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}
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if (particle==alphaPlusDef)
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{
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SetLowEnergyLimit(lowEnergyLimit[alphaPlus]);
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SetHighEnergyLimit(highEnergyLimit[alphaPlus]);
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}
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if (particle==heliumDef)
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{
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SetLowEnergyLimit(lowEnergyLimit[helium]);
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SetHighEnergyLimit(highEnergyLimit[helium]);
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}
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// Final state
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//ALPHA+
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f0[0][0]=1.;
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a0[0][0]=2.25;
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a1[0][0]=-0.75;
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b0[0][0]=-32.10;
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c0[0][0]=0.600;
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d0[0][0]=2.40;
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x0[0][0]=4.60;
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x1[0][0]=-1.;
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b1[0][0]=-1.;
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numberOfPartialCrossSections[0]=1;
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//HELIUM
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f0[0][1]=1.;
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a0[0][1]=2.25;
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a1[0][1]=-0.75;
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b0[0][1]=-30.93;
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c0[0][1]=0.590;
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d0[0][1]=2.35;
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x0[0][1]=4.29;
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f0[1][1]=1.;
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a0[1][1]=2.25;
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a1[1][1]=-0.75;
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b0[1][1]=-32.61;
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c0[1][1]=0.435;
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d0[1][1]=2.70;
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x0[1][1]=4.45;
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x1[0][1]=-1.;
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b1[0][1]=-1.;
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x1[1][1]=-1.;
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b1[1][1]=-1.;
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numberOfPartialCrossSections[1]=2;
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//
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if( verboseLevel>0 )
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{
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G4cout << "Dingfelder charge increase model is initialized " << G4endl
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<< "Energy range: "
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<< LowEnergyLimit() / keV << " keV - "
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<< HighEnergyLimit() / MeV << " MeV for "
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<< particle->GetParticleName()
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<< G4endl;
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}
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// Initialize water density pointer
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fpMolWaterDensity = G4DNAMolecularMaterial::Instance()->GetNumMolPerVolTableFor(G4Material::GetMaterial("G4_WATER"));
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if (isInitialised) return;
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fParticleChangeForGamma = GetParticleChangeForGamma();
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isInitialised = true;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4DNADingfelderChargeIncreaseModel::CrossSectionPerVolume(const G4Material* material,
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const G4ParticleDefinition* particleDefinition,
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G4double k,
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G4double,
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G4double)
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{
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if (verboseLevel > 3)
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{
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G4cout
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<< "Calling CrossSectionPerVolume() of G4DNADingfelderChargeIncreaseModel"
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<< G4endl;
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}
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// Calculate total cross section for model
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G4DNAGenericIonsManager *instance;
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instance = G4DNAGenericIonsManager::Instance();
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if (
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particleDefinition != instance->GetIon("hydrogen")
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&&
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particleDefinition != instance->GetIon("alpha+")
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&&
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particleDefinition != instance->GetIon("helium")
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)
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return 0;
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G4double lowLim = 0;
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G4double highLim = 0;
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G4double totalCrossSection = 0.;
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G4double waterDensity = (*fpMolWaterDensity)[material->GetIndex()];
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const G4String& particleName = particleDefinition->GetParticleName();
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std::map< G4String,G4double,std::less<G4String> >::iterator pos1;
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pos1 = lowEnergyLimit.find(particleName);
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if (pos1 != lowEnergyLimit.end())
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{
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lowLim = pos1->second;
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}
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std::map< G4String,G4double,std::less<G4String> >::iterator pos2;
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pos2 = highEnergyLimit.find(particleName);
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if (pos2 != highEnergyLimit.end())
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{
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highLim = pos2->second;
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}
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if (k >= lowLim && k <= highLim)
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{
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//HYDROGEN
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if (particleDefinition == instance->GetIon("hydrogen"))
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{
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const G4double aa = 2.835;
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const G4double bb = 0.310;
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const G4double cc = 2.100;
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const G4double dd = 0.760;
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const G4double fac = 1.0e-18;
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const G4double rr = 13.606 * eV;
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G4double t = k / (proton_mass_c2/electron_mass_c2);
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G4double x = t / rr;
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G4double temp = 4.0 * pi * Bohr_radius/nm * Bohr_radius/nm * fac;
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G4double sigmal = temp * cc * (std::pow(x,dd));
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G4double sigmah = temp * (aa * std::log(1.0 + x) + bb) / x;
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totalCrossSection = 1.0/(1.0/sigmal + 1.0/sigmah) *m*m;
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}
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else
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{
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totalCrossSection = Sum(k,particleDefinition);
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}
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}
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if (verboseLevel > 2)
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{
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G4cout << "__________________________________" << G4endl;
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G4cout << "G4DNADingfelderChargeIncreaseModel - XS INFO START" << G4endl;
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G4cout << "Kinetic energy(eV)=" << k/eV << " particle : " << particleName << G4endl;
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G4cout << "Cross section per water molecule (cm^2)=" << totalCrossSection/cm/cm << G4endl;
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G4cout << "Cross section per water molecule (cm^-1)=" << totalCrossSection*waterDensity/(1./cm) << G4endl;
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// G4cout << " - Cross section per water molecule (cm^-1)="
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// << sigma*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl;
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G4cout << "G4DNADingfelderChargeIncreaseModel - XS INFO END" << G4endl;
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}
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return totalCrossSection*waterDensity;
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// return totalCrossSection*material->GetAtomicNumDensityVector()[1];
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4DNADingfelderChargeIncreaseModel::SampleSecondaries(std::vector<
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G4DynamicParticle*>* fvect,
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const G4MaterialCutsCouple* /*couple*/,
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const G4DynamicParticle* aDynamicParticle,
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G4double,
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G4double)
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{
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if (verboseLevel > 3)
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{
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G4cout
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<< "Calling SampleSecondaries() of G4DNADingfelderChargeIncreaseModel"
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<< G4endl;
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}
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if (!statCode) fParticleChangeForGamma->ProposeLocalEnergyDeposit(0.);
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G4ParticleDefinition* definition = aDynamicParticle->GetDefinition();
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G4double particleMass = definition->GetPDGMass();
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G4double inK = aDynamicParticle->GetKineticEnergy();
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G4int finalStateIndex = RandomSelect(inK,definition);
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G4int n = NumberOfFinalStates(definition,finalStateIndex);
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G4double outK = 0.;
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if (!statCode) outK = inK - IncomingParticleBindingEnergyConstant(definition,finalStateIndex);
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else outK = inK;
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if (statCode)
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fParticleChangeForGamma->
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ProposeLocalEnergyDeposit(IncomingParticleBindingEnergyConstant(definition,finalStateIndex));
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fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
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G4DNAGenericIonsManager* instance;
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instance = G4DNAGenericIonsManager::Instance();
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G4double electronK;
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if (definition == instance->GetIon("hydrogen")) electronK = inK*electron_mass_c2/proton_mass_c2;
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else electronK = inK*electron_mass_c2/(particleMass);
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if (outK<0)
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{
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G4Exception("G4DNADingfelderChargeIncreaseModel::SampleSecondaries","em0004",
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FatalException,"Final kinetic energy is negative.");
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}
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G4DynamicParticle* dp = new G4DynamicParticle(OutgoingParticleDefinition(definition,finalStateIndex),
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aDynamicParticle->GetMomentumDirection(),
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outK);
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fvect->push_back(dp);
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n = n - 1;
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while (n>0)
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{
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n--;
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fvect->push_back(new G4DynamicParticle
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(G4Electron::Electron(), aDynamicParticle->GetMomentumDirection(), electronK) );
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4int G4DNADingfelderChargeIncreaseModel::NumberOfFinalStates(G4ParticleDefinition* particleDefinition,
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G4int finalStateIndex)
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{
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G4DNAGenericIonsManager* instance;
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instance = G4DNAGenericIonsManager::Instance();
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if (particleDefinition == instance->GetIon("hydrogen"))
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return 2;
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if (particleDefinition == instance->GetIon("alpha+"))
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return 2;
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if (particleDefinition == instance->GetIon("helium"))
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{
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if (finalStateIndex == 0)
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return 2;
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return 3;
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}
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return 0;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4ParticleDefinition* G4DNADingfelderChargeIncreaseModel::OutgoingParticleDefinition(G4ParticleDefinition* particleDefinition,
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G4int finalStateIndex)
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{
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G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
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if (particleDefinition == instance->GetIon("hydrogen"))
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return G4Proton::Proton();
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if (particleDefinition == instance->GetIon("alpha+"))
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return instance->GetIon("alpha++");
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if (particleDefinition == instance->GetIon("helium"))
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{
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if (finalStateIndex == 0)
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return instance->GetIon("alpha+");
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return instance->GetIon("alpha++");
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}
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return 0;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4double G4DNADingfelderChargeIncreaseModel::IncomingParticleBindingEnergyConstant(G4ParticleDefinition* particleDefinition,
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G4int finalStateIndex)
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{
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G4DNAGenericIonsManager * instance(G4DNAGenericIonsManager::Instance());
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if (particleDefinition == instance->GetIon("hydrogen"))
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return 13.6 * eV;
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if (particleDefinition == instance->GetIon("alpha+"))
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{
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// Binding energy for He+ -> He++ + e- 54.509 eV
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// Binding energy for He -> He+ + e- 24.587 eV
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return 54.509 * eV;
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}
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if (particleDefinition == instance->GetIon("helium"))
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{
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// Binding energy for He+ -> He++ + e- 54.509 eV
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// Binding energy for He -> He+ + e- 24.587 eV
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if (finalStateIndex == 0)
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return 24.587 * eV;
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return (54.509 + 24.587) * eV;
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}
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return 0;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4double G4DNADingfelderChargeIncreaseModel::PartialCrossSection(G4double k,
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G4int index,
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const G4ParticleDefinition* particleDefinition)
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{
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G4int particleTypeIndex = 0;
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G4DNAGenericIonsManager *instance;
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instance = G4DNAGenericIonsManager::Instance();
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if (particleDefinition == instance->GetIon("alpha+"))
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particleTypeIndex = 0;
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if (particleDefinition == instance->GetIon("helium"))
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particleTypeIndex = 1;
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//
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// sigma(T) = f0 10 ^ y(log10(T/eV))
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//
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// / a0 x + b0 x < x0
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// |
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// y(x) = < a0 x + b0 - c0 (x - x0)^d0 x0 <= x < x1
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// |
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// \ a1 x + b1 x >= x1
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//
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//
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// f0, a0, a1, b0, b1, c0, d0, x0, x1 are parameters that change for protons and helium (0, +, ++)
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//
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// f0 has been added to the code in order to manage partial (shell-dependent) cross sections
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// (if no shell dependence is present. f0=1. Sum of f0 over the considered shells should give 1)
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//
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// From Rad. Phys. and Chem. 59 (2000) 255-275, M. Dingfelder et al.
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// Inelastic-collision cross sections of liquid water for interactions of energetic proton
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//
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if (x1[index][particleTypeIndex] < x0[index][particleTypeIndex])
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{
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//
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// if x1 < x0 means that x1 and b1 will be calculated with the following formula
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// (this piece of code is run on all alphas and not on protons)
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//
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// x1 = x0 + ((a0 - a1)/(c0 * d0)) ^ (1 / (d0 - 1))
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//
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// b1 = (a0 - a1) * x1 + b0 - c0 * (x1 - x0) ^ d0
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//
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x1[index][particleTypeIndex] = x0[index][particleTypeIndex]
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+ std::pow((a0[index][particleTypeIndex] - a1[index][particleTypeIndex])
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/ (c0[index][particleTypeIndex]
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* d0[index][particleTypeIndex]),
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1. / (d0[index][particleTypeIndex] - 1.));
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b1[index][particleTypeIndex] = (a0[index][particleTypeIndex]
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- a1[index][particleTypeIndex]) * x1[index][particleTypeIndex]
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+ b0[index][particleTypeIndex]
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- c0[index][particleTypeIndex]
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* std::pow(x1[index][particleTypeIndex]
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- x0[index][particleTypeIndex],
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d0[index][particleTypeIndex]);
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}
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G4double x(std::log10(k / eV));
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G4double y;
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if (x < x0[index][particleTypeIndex])
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y = a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex];
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else if (x < x1[index][particleTypeIndex])
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y = a0[index][particleTypeIndex] * x + b0[index][particleTypeIndex]
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- c0[index][particleTypeIndex]
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* std::pow(x - x0[index][particleTypeIndex],
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d0[index][particleTypeIndex]);
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else
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y = a1[index][particleTypeIndex] * x + b1[index][particleTypeIndex];
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return f0[index][particleTypeIndex] * std::pow(10., y) * m * m;
|
|
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
G4int G4DNADingfelderChargeIncreaseModel::RandomSelect(G4double k,
|
|
const G4ParticleDefinition* particleDefinition)
|
|
{
|
|
G4int particleTypeIndex = 0;
|
|
G4DNAGenericIonsManager *instance;
|
|
instance = G4DNAGenericIonsManager::Instance();
|
|
|
|
if (particleDefinition == instance->GetIon("hydrogen"))
|
|
return 0;
|
|
|
|
if (particleDefinition == instance->GetIon("alpha+"))
|
|
particleTypeIndex = 0;
|
|
|
|
if (particleDefinition == instance->GetIon("helium"))
|
|
particleTypeIndex = 1;
|
|
|
|
const G4int n = numberOfPartialCrossSections[particleTypeIndex];
|
|
G4double* values(new G4double[n]);
|
|
G4double value = 0;
|
|
G4int i = n;
|
|
|
|
while (i > 0)
|
|
{
|
|
i--;
|
|
values[i] = PartialCrossSection(k, i, particleDefinition);
|
|
value += values[i];
|
|
}
|
|
|
|
value *= G4UniformRand();
|
|
|
|
i = n;
|
|
while (i > 0)
|
|
{
|
|
i--;
|
|
|
|
if (values[i] > value)
|
|
break;
|
|
|
|
value -= values[i];
|
|
}
|
|
|
|
delete[] values;
|
|
|
|
return i;
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
G4double G4DNADingfelderChargeIncreaseModel::Sum(G4double k,
|
|
const G4ParticleDefinition* particleDefinition)
|
|
{
|
|
G4int particleTypeIndex = 0;
|
|
G4DNAGenericIonsManager *instance;
|
|
instance = G4DNAGenericIonsManager::Instance();
|
|
|
|
if (particleDefinition == instance->GetIon("alpha+"))
|
|
particleTypeIndex = 0;
|
|
|
|
if (particleDefinition == instance->GetIon("helium"))
|
|
particleTypeIndex = 1;
|
|
|
|
G4double totalCrossSection = 0.;
|
|
|
|
for (G4int i = 0; i < numberOfPartialCrossSections[particleTypeIndex]; i++)
|
|
{
|
|
totalCrossSection += PartialCrossSection(k, i, particleDefinition);
|
|
}
|
|
|
|
return totalCrossSection;
|
|
}
|