G4ProtonCoulombBarrier.cc

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00025 //
00026 // $Id$
00027 //
00028 // Hadronic Process: Nuclear De-excitations
00029 // by V. Lara (Dec 1999)
00030 
00031 
00032 #include "G4ProtonCoulombBarrier.hh"
00033 
00034 G4ProtonCoulombBarrier::G4ProtonCoulombBarrier() : G4CoulombBarrier(1,1) 
00035 {}
00036 
00037 G4ProtonCoulombBarrier::~G4ProtonCoulombBarrier() 
00038 {}
00039 
00040 G4double G4ProtonCoulombBarrier::BarrierPenetrationFactor(G4double aZ) const
00041 {
00042     // Data comes from 
00043     // Dostrovsky, Fraenkel and Friedlander
00044     // Physical Review, vol 116, num. 3 1959
00045     // 
00046     // const G4int size = 5;
00047     // const G4double Zlist[size] = {10.0, 20.0, 30.0, 50.0, 70.0};
00048     // const G4double Kprot[size] = {0.42, 0.58, 0.68, 0.77, 0.80};
00049     G4double K = 1.0;
00050     if (aZ>=70.0) {
00051         K = 0.80;
00052     } else {
00053         K = (((0.2357e-5*aZ) - 0.42679e-3)*aZ + 0.27035e-1)*aZ + 0.19025;
00054     }
00055     return K;
00056 }

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