Geant4  10.00.p02
G4ReactionKinematics.hh
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29 // GEANT 4 class header file --- Copyright CERN 1995
30 // CERN Geneva Switzerland
31 //
32 // ------------ G4ReactionDynamics::TwoBody ------
33 // new inline method BreakupMomentum
34 // new method TwoBodyScattering
35 // by Christian V"olcker (CERN-Munich), August 1997
36 // E-mail: Christian.Volcker@cern.ch
37 // ************************************************************
38 //-----------------------------------------------------------------------------
39 
40 #ifndef G4ReactionKinematics_h
41 #define G4ReactionKinematics_h 1
42 
43 #include "globals.hh"
44 #include "Randomize.hh"
45 #include "G4VRestProcess.hh"
46 #include "G4ParticleTypes.hh"
47 
49 public:
50  void TwoBodyScattering( const G4DynamicParticle* pIn1, const G4DynamicParticle* pIn2,
51  G4DynamicParticle* pOut1, G4DynamicParticle* pOut2);
52 
53  inline G4double BreakupMomentum( G4double totalMass, G4double m1, G4double m2);
54 
55 };
56 
58  G4double totalMass, G4double massA, G4double massB){
59 
60 // is aequivalent to G4double G4PhaseSpaceDecayChannel::Pmx !!
61 
62  G4double m0squared=totalMass*totalMass;
63  G4double breakupMomentumSquared=
64  (m0squared-(massA+massB)*(massA+massB))*
65  (m0squared-(massA-massB)*(massA-massB))/
66  (4*m0squared);
67  if (breakupMomentumSquared>0) return std::sqrt(breakupMomentumSquared);
68  else return -1.;
69 }
70 
71 
72 #endif
static const double m2
Definition: G4SIunits.hh:111
G4double BreakupMomentum(G4double totalMass, G4double m1, G4double m2)
void TwoBodyScattering(const G4DynamicParticle *pIn1, const G4DynamicParticle *pIn2, G4DynamicParticle *pOut1, G4DynamicParticle *pOut2)
double G4double
Definition: G4Types.hh:76