include/Geant4/G4VScatteringCollision.hh

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0025 //
0026 //
0027 // -------------------------------------------------------------------
0028 //      GEANT4 Class file
0029 //
0030 //      For information related to this code contact:
0031 //
0032 //      File name:     G4VElasticCollision
0033 //
0034 //      Author:        Maria Grazia Pia
0035 //
0036 //      Creation date: 15 April 1999
0037 //
0038 //      Modifications:
0039 //
0040 // -------------------------------------------------------------------
0041
0042 #ifndef G4VSCATTERINGCOLLISION_HH
0043 #define G4VSCATTERINGCOLLISION_HH
0044
0045 #include "globals.hh"
0046 #include "G4Log.hh"
0047 #include "G4VCollision.hh"
0048 #include "G4VCrossSectionSource.hh"
0049 #include "G4VAngularDistribution.hh"
0050 #include "G4KineticTrackVector.hh"
0051
0052 class G4KineticTrack;
0053
0054
0055 class G4VScatteringCollision : public G4VCollision
0056 {
0057
0058 public:
0059
0060   G4VScatteringCollision();
0061   void establish_G4MT_TLS_G4VScatteringCollision();
0062   virtual ~G4VScatteringCollision();
0063
0064   G4bool operator==(const G4VScatteringCollision &right) const;
0065   G4bool operator!=(const G4VScatteringCollision &right) const;
0066
0067   virtual G4KineticTrackVector* FinalState(const G4KineticTrack& trk1,
0068                           const G4KineticTrack& trk2) const;
0069   virtual const G4VAngularDistribution* GetAngularDistribution() const
0070   {
0071     return theAngularDistribution;
0072   }
0073
0074 private:
0075   G4VScatteringCollision(const G4VScatteringCollision &);
0076   G4VScatteringCollision & operator= (const G4VScatteringCollision &);
0077
0078 protected:
0079
0080   virtual const std::vector<const G4ParticleDefinition*> & GetOutgoingParticles() const = 0;
0081
0082 private:
0083
0084   double BrWigInt0(const double x, const double gamma, const double m0) const
0085     { return 2.0*gamma*std::atan( 2.0 * (x-m0)/ gamma  ); }
0086
0087   G4double BrWigInt1(const G4double x, const G4double gamma, const G4double m0) const
0088     { return 0.5*gamma*gamma*G4Log( (x-m0)*(x-m0)+gamma*gamma/4.0 ) + m0*BrWigInt0(x,gamma,m0); }
0089
0090   double BrWigInv(const double x, const double gamma, const double m0) const
0091     { return 0.5*gamma*std::tan( 0.5*x/gamma )+m0; }
0092
0093   double SampleResonanceMass(const double poleMass,
0094                  const double width,
0095                  const double minMass,
0096                  const double maxMass) const;
0097 private:
0098
0099  G4VAngularDistribution * theAngularDistribution;
0100
0101 };
0102
0103
0104
0105
0106 #endif