Gabriele Cosmo
173 lines
5.4 KiB
C++
173 lines
5.4 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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// Hadronic Process: Nuclear De-excitations
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// by V. Lara (Oct 1998)
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#ifndef G4CompetitiveFission_h
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#define G4CompetitiveFission_h 1
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#include "G4VEvaporationChannel.hh"
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#include "G4Fragment.hh"
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#include "G4VEmissionProbability.hh"
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#include "G4FissionParameters.hh"
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#include <CLHEP/Units/SystemOfUnits.h>
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#include "G4Exp.hh"
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class G4VFissionBarrier;
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class G4VEmissionProbability;
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class G4VLevelDensityParameter;
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class G4PairingCorrection;
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class G4CompetitiveFission : public G4VEvaporationChannel
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{
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public:
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G4CompetitiveFission();
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~G4CompetitiveFission() override;
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void Initialise() override;
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G4Fragment* EmittedFragment(G4Fragment* theNucleus) override;
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G4double GetEmissionProbability(G4Fragment* theNucleus) override;
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void SetFissionBarrier(G4VFissionBarrier * aBarrier);
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void SetEmissionStrategy(G4VEmissionProbability * aFissionProb);
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void SetLevelDensityParameter(G4VLevelDensityParameter * aLevelDensity);
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inline G4double GetFissionBarrier(void) const;
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inline G4double GetLevelDensityParameter(void) const;
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inline G4double GetMaximalKineticEnergy(void) const;
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G4CompetitiveFission(const G4CompetitiveFission &right) = delete;
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const G4CompetitiveFission & operator=(const G4CompetitiveFission &right) = delete;
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G4bool operator==(const G4CompetitiveFission &right) const = delete;
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G4bool operator!=(const G4CompetitiveFission &right) const = delete;
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private:
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// Sample AtomicNumber of Fission products
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G4int FissionAtomicNumber(G4int A);
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G4double MassDistribution(G4double x, G4int A);
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// Sample Charge of fission products
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G4int FissionCharge(G4int A, G4int Z, G4double Af);
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// Sample Kinetic energy of fission products
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G4double FissionKineticEnergy(G4int A, G4int Z,
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G4int Af1, G4int Zf1,
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G4int Af2, G4int Zf2,
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G4double U, G4double Tmax);
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inline G4double Ratio(G4double A, G4double A11,
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G4double B1, G4double A00) const;
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inline G4double SymmetricRatio(G4int A, G4double A11) const;
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inline G4double AsymmetricRatio(G4int A, G4double A11) const;
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inline G4double LocalExp(G4double x) const;
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// Maximal Kinetic Energy that can be carried by fragment
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G4double maxKineticEnergy{0.0};
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G4double fissionBarrier{0.0};
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G4double fissionProbability{0.0};
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G4double fFactor{1.0};
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// For Fission barrier
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G4VFissionBarrier* theFissionBarrierPtr;
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// For Fission probability emission
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G4VEmissionProbability* theFissionProbabilityPtr;
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// For Level Density calculation
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G4VLevelDensityParameter* theLevelDensityPtr;
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G4PairingCorrection* pairingCorrection;
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G4bool myOwnFissionProbability{true};
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G4bool myOwnFissionBarrier{true};
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G4bool myOwnLevelDensity{true};
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G4FissionParameters theParam;
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G4int theSecID; // Creator model ID for the secondaries created by this model
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G4bool isInitialised{false};
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};
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inline G4double G4CompetitiveFission::GetFissionBarrier(void) const
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{
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return fissionBarrier;
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}
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inline G4double G4CompetitiveFission::GetMaximalKineticEnergy(void) const
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{
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return maxKineticEnergy;
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}
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inline
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G4double G4CompetitiveFission::Ratio(G4double A, G4double A11,
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G4double B1, G4double A00) const
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{
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G4double res;
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if (A11 >= A*0.5 && A11 <= (A00+10.0)) {
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G4double x = (A11-A00)/A;
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res = 1.0 - B1*x*x;
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} else {
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G4double x = 10.0/A;
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res = 1.0 - B1*x*x - 2.0*x*B1*(A11-A00-10.0)/A;
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}
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return res;
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}
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inline
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G4double G4CompetitiveFission::AsymmetricRatio(G4int A, G4double A11) const
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{
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return Ratio(G4double(A),A11,23.5,134.0);
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}
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inline
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G4double G4CompetitiveFission::SymmetricRatio(G4int A, G4double A11) const
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{
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G4double A0 = G4double(A);
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return Ratio(A0,A11,5.32,A0*0.5);
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}
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inline G4double G4CompetitiveFission::LocalExp(G4double x) const
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{
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return (std::abs(x) < 8.) ? G4Exp(-0.5*x*x) : 0.0;
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}
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#endif
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