Gabriele Cosmo
122 lines
4.1 KiB
C++
122 lines
4.1 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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// -------------------------------------------------------------------
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//
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// GEANT4 Class header file G4ChargeExchangeXS
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//
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// Author V.Ivanchenko
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//
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// Modified: 09.08.2023 Tim Lok Chau, CERN summer student program
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//
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// This is a class for charge exchange hadronic cross sections:
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// pi- + N(Z, A) -> X + N(Z-1, A)
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// pi+ + N(Z, A) -> X + N(Z+1, A)
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//
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// where X = pi0, eta, etaP, omega, f2
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// V. Lyubovitsky, NA64 Collaboration (CERN)
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//
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// K- + N(Z, A) -> Y + N(Z-1, A)
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// K+ + N(Z, A) -> Y + N(Z+1, A)
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// KL + N(Z, A) -> K+ + N(Z-1, A)
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// KL + N(Z, A) -> K- + N(Z+1, A)
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//
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// where Y = KS, KL
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//
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#ifndef G4CHARGEEXCHANGEXS_HH
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#define G4CHARGEEXCHANGEXS_HH
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#include "G4VCrossSectionDataSet.hh"
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#include "globals.hh"
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#include <vector>
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class G4DynamicParticle;
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class G4ParticleDefinition;
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class G4Isotope;
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class G4Element;
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class G4Material;
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class G4Pow;
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class G4ChargeExchangeXS final : public G4VCrossSectionDataSet
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{
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public:
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G4ChargeExchangeXS();
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~G4ChargeExchangeXS() override = default;
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G4bool IsElementApplicable(const G4DynamicParticle*, G4int Z,
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const G4Material*) final;
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G4double GetElementCrossSection(const G4DynamicParticle*, G4int Z,
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const G4Material*) final;
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void CrossSectionDescription(std::ostream&) const final;
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const G4ParticleDefinition*
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SampleSecondaryType(const G4ParticleDefinition*, const G4Material*,
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G4int Z, G4int A, G4double etot);
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G4double GetPartialPionXS(G4int idx) const;
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void SetEnergyLimit(G4double val) { fEnergyLimit = val; };
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void SetPionCrossSectionFactor(G4double val) { fFactorPi = val; };
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void SetKaonCrossSectionFactor(G4double val) { fFactorK = val; };
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G4double GetCrossSectionFactor() const { return fFactor; };
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G4bool isPion() const { return findex >= 0; };
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G4double SampleTforPion(const G4double etot,
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const G4double tmax) const;
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G4ChargeExchangeXS & operator=(const G4ChargeExchangeXS &right) = delete;
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G4ChargeExchangeXS(const G4ChargeExchangeXS&) = delete;
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private:
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G4double GetCrossSection(const G4ParticleDefinition*, const G4Material*,
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G4int Z, G4double etot);
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G4double ComputeDeuteronFraction(const G4Material*) const;
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G4Pow* g4calc;
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G4int findex{-1};
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const G4ParticleDefinition* fPionSecPD[5];
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G4double fXSecPion[5] = {0.0, 0.0, 0.0, 0.0, 0.0};
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G4double fEnergyLimit{0.0};
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G4double fFactorPi{1.0};
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G4double fFactorK{1.0};
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G4double fFactor{1.0};
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G4double fMassPi;
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};
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#endif
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