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2024-12-06 11:11:40 +01:00

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//
// ********************************************************************
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// * *
// * The Geant4 software is copyright of the Copyright Holders of *
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// * This code implementation is the result of the scientific and *
// * technical work of the GEANT4 collaboration. *
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// ********************************************************************
//
// V. Ivanchenko September 2023
//
// G4CrossSectionHP is a generic class implementing
// cross sections for neutrons, protons and light ions
// It is an alternative to code developed by J.P. Wellisch & T.Koi
//
#ifndef G4CrossSectionHP_h
#define G4CrossSectionHP_h 1
#include "G4VCrossSectionDataSet.hh"
#include "globals.hh"
#include "G4ElementData.hh"
#include "G4PhysicsVector.hh"
#include "G4LorentzVector.hh"
#include "G4ThreeVector.hh"
#include <vector>
class G4DynamicParticle;
class G4ParticleDefinition;
class G4ParticleHPManager;
class G4Element;
class G4Material;
class G4CrossSectionHP : public G4VCrossSectionDataSet
{
public:
explicit G4CrossSectionHP(const G4ParticleDefinition*,
const G4String& nameData,
const G4String& nameDir, G4double emaxHP,
G4int zmin, G4int zmax);
~G4CrossSectionHP() override = default;
G4bool IsIsoApplicable(const G4DynamicParticle*, G4int Z, G4int A,
const G4Element*, const G4Material*) override;
G4double GetIsoCrossSection(const G4DynamicParticle*, G4int Z, G4int A,
const G4Isotope*, const G4Element*,
const G4Material*) override;
G4double ComputeIsoCrossSection(G4double kinEnergy, G4double loge,
const G4ParticleDefinition*,
G4int Z, G4int A,
const G4Isotope* iso,
const G4Element* elm,
const G4Material* mat) override;
const G4Isotope* SelectIsotope(const G4Element*, G4double kinEnergy,
G4double logE) override;
void BuildPhysicsTable(const G4ParticleDefinition&) override;
void DumpPhysicsTable(const G4ParticleDefinition&) override;
G4CrossSectionHP & operator=(const G4CrossSectionHP &right) = delete;
G4CrossSectionHP(const G4CrossSectionHP&) = delete;
protected:
inline G4double GetMaxHPEnergy() const;
inline void SetBinSearch(G4int n);
private:
void Initialise(const G4int Z);
void PrepareCache(const G4Material*);
G4double IsoCrossSection(const G4double kinE, const G4double loge,
const G4int Z, const G4int A,
const G4double temperature);
inline G4double GetCrossSection(const G4int Z, const G4int A);
inline G4bool CheckCache(const G4int Z);
const G4ParticleDefinition* fParticle;
const G4ParticleDefinition* fNeutron;
G4ParticleHPManager* fManagerHP;
const G4double emax;
const G4double emaxT;
const G4double elimit;
const G4double logElimit;
G4LorentzVector fLV;
G4ThreeVector fBoost;
const G4int minZ;
const G4int maxZ;
G4int binSearch{2};
std::size_t index{0};
G4bool fPrinted{false};
// cache
const G4Material* fCurrentMat{nullptr};
std::vector<std::pair<G4int, G4int> > fZA;
std::vector<G4double> fIsoXS;
std::vector<G4double> fTemp;
const G4String fDataName;
const G4String fDataDirectory;
G4ElementData* fData{nullptr};
};
inline G4double
G4CrossSectionHP::GetCrossSection(const G4int Z, const G4int A)
{
G4double res = 0.0;
for (std::size_t i=0; i<fZA.size(); ++i) {
if (Z == fZA[i].first && A == fZA[i].second) {
res = fIsoXS[i];
break;
}
}
return res;
}
inline G4bool G4CrossSectionHP::CheckCache(const G4int Z)
{
G4bool res = false;
for (auto const & p : fZA) {
if (Z == p.first) {
res = true;
break;
}
}
return res;
}
inline G4double G4CrossSectionHP::GetMaxHPEnergy() const
{
return emax;
}
inline void G4CrossSectionHP::SetBinSearch(G4int n)
{
if (n > 0) { binSearch = n; }
}
#endif