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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
//
// INCL++ revision: v5.0_rc3
//
#define INCLXX_IN_GEANT4_MODE 1

#include "globals.hh"

/** \file G4INCLCoulombNonRelativistic.hh
 * \brief Class for non-relativistic Coulomb distortion.
 *
 * Created on: 14 February 2011
 *     Author: Davide Mancusi
 */

#ifndef G4INCLCOULOMBNONRELATIVISTIC_HH_
#define G4INCLCOULOMBNONRELATIVISTIC_HH_

#include "G4INCLParticle.hh"
#include "G4INCLNucleus.hh"
#include "G4INCLICoulomb.hh"

namespace G4INCL {

  class CoulombNonRelativistic : public ICoulomb {
  public:
    CoulombNonRelativistic() {}
    virtual ~CoulombNonRelativistic() {}

    /** \brief Modify the momentum of the particle and position it on the
     *         surface of the nucleus.
     *
     * This method performs non-relativistic distortion.
     *
     * \param p incoming particle
     * \param n distorting nucleus
     **/
    void bringToSurface(Particle * const p, Nucleus const * const n) const;

    /** \brief Modify the momenta of the outgoing particles.
     *
     * This method performs non-relativistic distortion.
     *
     * \param pL list of outgoing particles
     * \param n distorting nucleus
     */
    void distortOut(ParticleList const &pL, Nucleus const * const n) const;

    /** \brief Return the maximum impact parameter for Coulomb-distorted
     *         trajectories. **/
    G4double maxImpactParameter(Particle const * const p, Nucleus const *
        const n) const;

  private:
    /** \brief Return the "Coulomb factor". */
    G4double coulombFactor(Particle const * const p, Nucleus const * const n) const {
      return eSquared * p->getZ() * n->getZ() / p->getKineticEnergy();
    }
  };
}

#endif /* G4INCLCOULOMBNONRELATIVISTIC_HH_ */