Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/hadronic/models/pre_equilibrium/exciton_model/src/G4HETCDeuteron.cc

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 25 //
 26 //
 27 // by V. Lara
 28 //
 29 // Modified:
 30 // 23.08.2010 V.Ivanchenko general cleanup, move constructor and destructor 
 31 //            the source, use G4Pow
 32 
 33 #include "G4HETCDeuteron.hh"
 34 #include "G4Deuteron.hh"
 35 #include "G4CoulombBarrier.hh"
 36 
 37 G4HETCDeuteron::G4HETCDeuteron() 
 38   : G4HETCChargedFragment(G4Deuteron::Deuteron(), new G4CoulombBarrier(2, 1))
 39 {}
 40 
 41 G4double G4HETCDeuteron::GetAlpha() const
 42 {
 43   G4double C = 0.0;
 44   if (theFragZ <= 70) 
 45     {
 46       C = 0.10;
 47     } 
 48   else 
 49     {
 50       C = ((((0.15417e-06*theFragZ) - 0.29875e-04)*theFragZ 
 51       + 0.21071e-02)*theFragZ - 0.66612e-01)*theFragZ + 0.98375; 
 52     }
 53   return 1.0 + C*0.5;
 54 }
 55   
 56 G4double G4HETCDeuteron::GetSpinFactor() const
 57 {
 58   // 2s+1
 59   return 3.0;
 60 }
 61 
 62 G4double G4HETCDeuteron::K(const G4Fragment& aFragment) const
 63 {
 64   // Number of protons in emitted fragment
 65   G4int Pa = theZ;
 66   // Number of neutrons in emitted fragment 
 67   G4int Na = theA - Pa;
 68 
 69   G4double r = (G4double)theResZ/(G4double)theResA;
 70   
 71   G4int P = aFragment.GetNumberOfParticles();
 72   G4int H = aFragment.GetNumberOfHoles();
 73 
 74   G4double result = (P > 1) ?
 75     2.*(H*(H-1.0)*r*(r-1.0)+H*(Na*r+Pa*(1.0-r)) + Pa*Na)
 76     /(P*(P-1.0)*r*(1.0 - r)) : 0.0;
 77 
 78   return std::max(0.0,result);
 79 }
 80