include/Geant4/G4INCLICoulomb.hh

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0025 //
0026 // INCL++ intra-nuclear cascade model
0027 // Alain Boudard, CEA-Saclay, France
0028 // Joseph Cugnon, University of Liege, Belgium
0029 // Jean-Christophe David, CEA-Saclay, France
0030 // Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
0031 // Sylvie Leray, CEA-Saclay, France
0032 // Davide Mancusi, CEA-Saclay, France
0033 //
0034 #define INCLXX_IN_GEANT4_MODE 1
0035
0036 #include "globals.hh"
0037
0038 /** \file G4INCLICoulomb.hh
0039  * \brief Abstract interface for Coulomb distortion.
0040  *
0041  * \date 14 February 2011
0042  * \author Davide Mancusi
0043  */
0044
0045 #ifndef G4INCLICOULOMB_HH_
0046 #define G4INCLICOULOMB_HH_
0047
0048 #include "G4INCLParticle.hh"
0049 #include "G4INCLParticleEntryAvatar.hh"
0050 #include "G4INCLNucleus.hh"
0051
0052 namespace G4INCL {
0053   class ICoulomb {
0054
0055     public:
0056
0057       ICoulomb() {}
0058       virtual ~ICoulomb() {}
0059
0060       /** \brief Modify the momentum of an incoming particle and position it on
0061        *         the surface of the nucleus.
0062        *
0063        * This method places Particle p on the surface of Nucleus n and modifies
0064        * the direction of its momentum to be tangent to the Coulomb trajectory in
0065        * that point.
0066        *
0067        * The input particle has to be prepared with its asymptotic momentum. Its
0068        * position is used only for the purpose of computing the asymptotic impact
0069        * parameter; in other words, this method only uses the components of the
0070        * position that are perpendicular to the momentum. The remaining component
0071        * is not used, and can be set to any value.
0072        *
0073        * This method returns a ParticleEntry avatar for the projectile.
0074        *
0075        * \param p incoming particle
0076        * \param n distorting nucleus
0077        * \return the ParticleEntryAvatar for the projectile particle
0078        **/
0079       virtual ParticleEntryAvatar *bringToSurface(Particle * const p, Nucleus * const n) const = 0;
0080
0081       /** \brief Modify the momentum of an incoming cluster and position it on
0082        *         the surface of the target.
0083        *
0084        * Same as the Particle-based bringToSurface method, but for incoming heavy
0085        * ions.
0086        *
0087        * This method returns a list of ParticleEntry avatars for the
0088        * participant nucleons
0089        *
0090        * \param c incoming heavy ion
0091        * \param n distorting nucleus
0092        * \return a list of ParticleEntryAvatars
0093        **/
0094       virtual IAvatarList bringToSurface(Cluster * const c, Nucleus * const n) const = 0;
0095
0096       /** \brief Modify the momenta of the outgoing particles. **/
0097       virtual void distortOut(ParticleList const &pL, Nucleus const * const n) const = 0;
0098
0099       /** \brief Return the maximum impact parameter for Coulomb-distorted
0100        *         trajectories. **/
0101       virtual G4double maxImpactParameter(ParticleSpecies const &p, const G4double kinE, Nucleus const * const n) const = 0;
0102
0103   };
0104 }
0105
0106 #endif /* G4INCLICOULOMB_HH_ */