Geant4_10
G4ProtonGEMCoulombBarrier.hh
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27 // J. M. Quesada (July 2009) based on G4ProtonCoulombBarrier
28 // Coded strictly according to Furihata's GEM paper
29 //
30 
31 #ifndef G4ProtonGEMCoulombBarrier_h
32 #define G4ProtonGEMCoulombBarrier_h 1
33 
34 #include "G4GEMCoulombBarrier.hh"
35 #include "globals.hh"
36 
38 {
39 public:
42 
43 private:
45 
47  G4bool operator==(const G4ProtonGEMCoulombBarrier & right) const;
48  G4bool operator!=(const G4ProtonGEMCoulombBarrier & right) const;
49 
50 private:
51  G4double BarrierPenetrationFactor(const G4double aZ) const {
52  // Data comes from
53  // Dostrovsky, Fraenkel and Friedlander
54  // Physical Review, vol 116, num. 3 1959
55  // (JMQ 190709: according to notes added on proof)
56  //dataK = {{20, 0.51}, {30, 0.60}, {40, 0.66}, {50, 0.68}};
57  //
58  G4double K = 1.0;
59  if (aZ >= 50){
60  K=0.68;
61  } else if (aZ <= 20) {
62  K=0.51;
63  } else K=0.28445+0.0115956*aZ+0.000026329*aZ*aZ-2.18583*1e-6*aZ*aZ*aZ+3.7083*1e-9*aZ*aZ*aZ*aZ;
64  return K;
65  }
66 };
67 
68 #endif
bool G4bool
Definition: G4Types.hh:79
double G4double
Definition: G4Types.hh:76