G4ProtonGEMCoulombBarrier.hh

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00001 //
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00025 //
00026 //
00027 // J. M. Quesada (July 2009) based on G4ProtonCoulombBarrier
00028 // Coded strictly according to Furihata's GEM paper 
00029 //
00030 
00031 #ifndef G4ProtonGEMCoulombBarrier_h
00032 #define G4ProtonGEMCoulombBarrier_h 1
00033 
00034 #include "G4GEMCoulombBarrier.hh"
00035 #include "globals.hh"
00036 
00037 class G4ProtonGEMCoulombBarrier : public G4GEMCoulombBarrier
00038 {
00039 public:
00040   G4ProtonGEMCoulombBarrier() : G4GEMCoulombBarrier(1,1) {}
00041   ~G4ProtonGEMCoulombBarrier() {}
00042   
00043 private:
00044   G4ProtonGEMCoulombBarrier(const G4ProtonGEMCoulombBarrier & right);
00045   
00046   const G4ProtonGEMCoulombBarrier & operator=(const G4ProtonGEMCoulombBarrier & right);
00047   G4bool operator==(const G4ProtonGEMCoulombBarrier & right) const;
00048   G4bool operator!=(const G4ProtonGEMCoulombBarrier & right) const;
00049   
00050 private:
00051   G4double BarrierPenetrationFactor(const G4double aZ) const {
00052     // Data comes from 
00053     // Dostrovsky, Fraenkel and Friedlander
00054     // Physical Review, vol 116, num. 3 1959
00055     // (JMQ 190709: according to notes added on proof)
00056     //dataK = {{20, 0.51}, {30, 0.60}, {40, 0.66}, {50, 0.68}};
00057     //
00058     G4double K = 1.0;   
00059     if (aZ >= 50){
00060       K=0.68;     
00061     } else if (aZ <= 20) {
00062       K=0.51; 
00063     } 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;      
00064     return K;
00065   }
00066 };
00067 
00068 #endif

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