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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"

/** \file G4INCLDeuteronDensity.hh
 * \brief Deuteron density in r and p according to the Paris potential.
 *
 * \date 6 March 2012
 * \author Davide Mancusi
 */

#ifndef G4INCLDEUTERONDENSITY_HH_
#define G4INCLDEUTERONDENSITY_HH_ 1

#include "G4INCLIFunction1D.hh"
#include "G4INCLInverseInterpolationTable.hh"

namespace G4INCL {

  /// \brief Static class for the deuteron density
  class DeuteronDensity {
    public:

      /** \brief PDF for a nucleon in r space
       *
       * The distribution is normalised to 1.
       *
       * \param r distance from the deuteron centre [fm]
       * \return 4 * pi * r^2 * |psi|^2
       */
      static G4double densityR(const G4double r);

      /** \brief First derivative of the r-space density function
       *
       * \param r distance from the deuteron centre [fm]
       * \return d|psi|^2/dr
       */
      static G4double derivDensityR(const G4double r);

      /** \brief PDF for a nucleon in p space
       *
       * The distribution is normalised to 1.
       *
       * \param p nucleon momentum [MeV/c]
       * \return 4 * pi * p^2 * d|psi|^2/dp
       */
      static G4double densityP(const G4double p);

      static G4double wavefunctionR(const G4int l, const G4double r);
      static G4double wavefunctionP(const G4int l, const G4double p);
      static G4double derivWavefunctionR(const G4int l, const G4double r);

    private:

      static const G4int coeffTableSize = 13;
      static const G4double coeff1[coeffTableSize];
      static const G4double coeff2[coeffTableSize];
      static const G4double normalisationR;
      static const G4double normalisationP;
      static const G4double al;
  };

}

#endif // G4INCLDEUTERONDENSITY_HH_