G4INCLINuclearPotential.hh

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//
// INCL++ intra-nuclear cascade model
// Pekka Kaitaniemi, CEA and Helsinki Institute of Physics
// Davide Mancusi, CEA
// Alain Boudard, CEA
// Sylvie Leray, CEA
// Joseph Cugnon, University of Liege
//
#define INCLXX_IN_GEANT4_MODE 1

#include "globals.hh"

#ifndef G4INCLINUCLEARPOTENTIAL_HH
#define G4INCLINUCLEARPOTENTIAL_HH 1

#include "G4INCLParticle.hh"
#include "G4INCLRandom.hh"
#include "G4INCLDeuteronDensity.hh"
#include <map>
// #include <cassert>

namespace G4INCL {

  namespace NuclearPotential {

    class INuclearPotential {
      public:
        INuclearPotential(const G4int A, const G4int Z, const G4bool pionPot) :
          theA(A),
          theZ(Z),
          pionPotential(pionPot)
        {
          if(pionPotential) {
            const G4double ZOverA = ((G4double) theZ) / ((G4double) theA);
            // As in INCL4.6, use the r0*A^(1/3) formula to estimate vc
            const G4double r = 1.12*Math::pow13((G4double)theA);

            const G4double xsi = 1. - 2.*ZOverA;
            const G4double vc = 1.25*PhysicalConstants::eSquared*theZ/r;
            vPiPlus = vPionDefault + 71.*xsi - vc;
            vPiZero = vPionDefault;
            vPiMinus = vPionDefault - 71.*xsi + vc;
          } else {
            vPiPlus = 0.0;
            vPiZero = 0.0;
            vPiMinus = 0.0;
          }
        }

        virtual ~INuclearPotential() {}

        G4bool hasPionPotential() { return pionPotential; }

        virtual G4double computePotentialEnergy(const Particle * const p) const = 0;

        inline G4double getFermiEnergy(const Particle * const p) const {
          std::map<ParticleType, G4double>::const_iterator i = fermiEnergy.find(p->getType());
// assert(i!=fermiEnergy.end());
          return i->second;
        }

        inline G4double getFermiEnergy(const ParticleType t) const {
          std::map<ParticleType, G4double>::const_iterator i = fermiEnergy.find(t);
// assert(i!=fermiEnergy.end());
          return i->second;
        }

        inline G4double getSeparationEnergy(const Particle * const p) const {
          std::map<ParticleType, G4double>::const_iterator i = separationEnergy.find(p->getType());
// assert(i!=separationEnergy.end());
          return i->second;
        }

        inline G4double getSeparationEnergy(const ParticleType t) const {
          std::map<ParticleType, G4double>::const_iterator i = separationEnergy.find(t);
// assert(i!=separationEnergy.end());
          return i->second;
        }

        inline G4double getFermiMomentum(const Particle * const p) const {
          if(p->isDelta()) {
            const G4double Tf = getFermiEnergy(p), m = p->getMass();
            return std::sqrt(Tf*(Tf+2.*m));
          } else {
            std::map<ParticleType, G4double>::const_iterator i = fermiMomentum.find(p->getType());
// assert(i!=fermiMomentum.end());
            return i->second;
          }
        }

        inline G4double getFermiMomentum(const ParticleType t) const {
// assert(t!=DeltaPlusPlus && t!=DeltaPlus && t!=DeltaZero && t!=DeltaMinus);
          std::map<ParticleType, G4double>::const_iterator i = fermiMomentum.find(t);
          return i->second;
        }

      protected:
        G4double computePionPotentialEnergy(const Particle * const p) const {
// assert(p->getType()==PiPlus || p->getType()==PiZero || p->getType()==PiMinus);
          if(pionPotential && !p->isOutOfWell()) {
            switch( p->getType() ) {
              case PiPlus:
                return vPiPlus;
                break;
              case PiZero:
                return vPiZero;
                break;
              case PiMinus:
                return vPiMinus;
                break;
              default: // Pion potential is defined and non-zero only for pions
                return 0.0;
                break;
            }
          }
          else
            return 0.0;
        }

      protected:
        const G4int theA;
        const G4int theZ;
      private:
        const G4bool pionPotential;
        G4double vPiPlus, vPiZero, vPiMinus;
        static const G4double vPionDefault;
      protected:
        /* \brief map of Fermi energies per particle type */
        std::map<ParticleType,G4double> fermiEnergy;
        /* \brief map of Fermi momenta per particle type */
        std::map<ParticleType,G4double> fermiMomentum;
        /* \brief map of separation energies per particle type */
        std::map<ParticleType,G4double> separationEnergy;

    };

  }

}

#endif /* G4INCLINUCLEARPOTENTIAL_HH_ */

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