G4DNAMeltonAttachmentModel.cc

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// $Id$
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// Created by Z. Francis

#include "G4DNAMeltonAttachmentModel.hh"
#include "G4SystemOfUnits.hh"
#include "G4DNAChemistryManager.hh"
#include "G4DNAMolecularMaterial.hh"

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using namespace std;

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G4DNAMeltonAttachmentModel::G4DNAMeltonAttachmentModel(const G4ParticleDefinition*,
                                                       const G4String& nam)
    :G4VEmModel(nam),isInitialised(false)
{
//    nistwater = G4NistManager::Instance()->FindOrBuildMaterial("G4_WATER");
    fpWaterDensity = 0;

    lowEnergyLimit = 4 * eV;
    lowEnergyLimitOfModel = 4 * eV;
    highEnergyLimit = 13 * eV;
    SetLowEnergyLimit(lowEnergyLimit);
    SetHighEnergyLimit(highEnergyLimit);

    verboseLevel= 0;
    // Verbosity scale:
    // 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 )
    {
        G4cout << "Melton Attachment model is constructed " << G4endl
               << "Energy range: "
               << lowEnergyLimit / eV << " eV - "
               << highEnergyLimit / eV << " eV"
               << G4endl;
    }
    fParticleChangeForGamma = 0;
    fDissociationFlag = true;
}

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G4DNAMeltonAttachmentModel::~G4DNAMeltonAttachmentModel()
{  
    // For total cross section

    std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;

    for (pos = tableData.begin(); pos != tableData.end(); ++pos)
    {
        G4DNACrossSectionDataSet* table = pos->second;
        delete table;
    }

    // For final state

}

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void G4DNAMeltonAttachmentModel::Initialise(const G4ParticleDefinition* /*particle*/,
                                            const G4DataVector& /*cuts*/)
{

    if (verboseLevel > 3)
        G4cout << "Calling G4DNAMeltonAttachmentModel::Initialise()" << G4endl;

    // Energy limits

    if (LowEnergyLimit() < lowEnergyLimit)
    {
        G4cout << "G4DNAMeltonAttachmentModel: low energy limit increased from " <<
                  LowEnergyLimit()/eV << " eV to " << lowEnergyLimit/eV << " eV" << G4endl;
        SetLowEnergyLimit(lowEnergyLimit);
    }

    if (HighEnergyLimit() > highEnergyLimit)
    {
        G4cout << "G4DNAMeltonAttachmentModel: high energy limit decreased from " <<
                  HighEnergyLimit()/eV << " eV to " << highEnergyLimit/eV << " eV" << G4endl;
        SetHighEnergyLimit(highEnergyLimit);
    }

    // Reading of data files

    G4double scaleFactor = 1e-18*cm*cm;

    G4String fileElectron("dna/sigma_attachment_e_melton");

    G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition();
    G4String electron;

    // ELECTRON

    // For total cross section
    
    electron = electronDef->GetParticleName();

    tableFile[electron] = fileElectron;

    G4DNACrossSectionDataSet* tableE = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor );
    tableE->LoadData(fileElectron);
    tableData[electron] = tableE;
    
    //
    
    if (verboseLevel > 2)
        G4cout << "Loaded cross section data for Melton Attachment model" << G4endl;

    if( verboseLevel>0 )
    {
        G4cout << "Melton Attachment model is initialized " << G4endl
               << "Energy range: "
               << LowEnergyLimit() / eV << " eV - "
               << HighEnergyLimit() / eV << " eV"
               << G4endl;
    }
    // Initialize water density pointer
    fpWaterDensity = G4DNAMolecularMaterial::Instance()->GetNumMolPerVolTableFor(G4Material::GetMaterial("G4_WATER"));

    if (isInitialised) { return; }
    fParticleChangeForGamma = GetParticleChangeForGamma();
    isInitialised = true;

}

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G4double G4DNAMeltonAttachmentModel::CrossSectionPerVolume(const G4Material* material,
                                                           const G4ParticleDefinition* particleDefinition,
                                                           G4double ekin,
                                                           G4double,
                                                           G4double)
{
    if (verboseLevel > 3)
        G4cout << "Calling CrossSectionPerVolume() of G4DNAMeltonAttachmentModel" << G4endl;

    // Calculate total cross section for model

    G4double sigma=0;

    G4double waterDensity = (*fpWaterDensity)[material->GetIndex()];

    if(waterDensity!= 0.0)
   //  if (material == nistwater || material->GetBaseMaterial() == nistwater)
    {
        const G4String& particleName = particleDefinition->GetParticleName();

        if (ekin >= lowEnergyLimit && ekin < highEnergyLimit)
        {

            std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
            pos = tableData.find(particleName);

            if (pos != tableData.end())
            {
                G4DNACrossSectionDataSet* table = pos->second;
                if (table != 0)
                {
                    sigma = table->FindValue(ekin);
                }
            }
            else
            {
                G4Exception("G4DNAMeltonAttachmentModel::ComputeCrossSectionPerVolume","em0002",
                            FatalException,"Model not applicable to particle type.");
            }
        }

        if (verboseLevel > 2)
        {
            G4cout << "__________________________________" << G4endl;
            G4cout << "°°° G4DNAMeltonAttachmentModel - XS INFO START" << G4endl;
            G4cout << "°°° Kinetic energy(eV)=" << ekin/eV << " particle : " << particleDefinition->GetParticleName() << G4endl;
            G4cout << "°°° Cross section per water molecule (cm^2)=" << sigma/cm/cm << G4endl;
            G4cout << "°°° Cross section per water molecule (cm^-1)=" << sigma*waterDensity/(1./cm) << G4endl;
            //      G4cout << " - Cross section per water molecule (cm^-1)=" << sigma*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl;
            G4cout << "°°° G4DNAMeltonAttachmentModel - XS INFO END" << G4endl;
        }

    } // if water

    return sigma*waterDensity;
//    return sigma*material->GetAtomicNumDensityVector()[1];
}

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void G4DNAMeltonAttachmentModel::SampleSecondaries(std::vector<G4DynamicParticle*>* /*fvect*/,
                                                   const G4MaterialCutsCouple* /*couple*/,
                                                   const G4DynamicParticle* aDynamicElectron,
                                                   G4double,
                                                   G4double)
{

    if (verboseLevel > 3)
        G4cout << "Calling SampleSecondaries() of G4DNAMeltonAttachmentModel" << G4endl;

    // Electron is killed

    G4double electronEnergy0 = aDynamicElectron->GetKineticEnergy();
    fParticleChangeForGamma->SetProposedKineticEnergy(0.);
    fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
    fParticleChangeForGamma->ProposeLocalEnergyDeposit(electronEnergy0);

    if(fDissociationFlag)
    {
        G4DNAChemistryManager::Instance()->CreateWaterMolecule(eDissociativeAttachment,-1,
                                                               fParticleChangeForGamma->GetCurrentTrack());
    }
    return ;
}