G4HETCDeuteron.cc

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00025 //
00026 // $Id$
00027 //
00028 // by V. Lara
00029 //
00030 // Modified:
00031 // 23.08.2010 V.Ivanchenko general cleanup, move constructor and destructor 
00032 //            the source, use G4Pow
00033 
00034 #include "G4HETCDeuteron.hh"
00035 #include "G4Deuteron.hh"
00036 
00037 G4HETCDeuteron::G4HETCDeuteron() 
00038   : G4HETCChargedFragment(G4Deuteron::Deuteron(), &theDeuteronCoulombBarrier)
00039 {}
00040 
00041 G4HETCDeuteron::~G4HETCDeuteron() 
00042 {}
00043 
00044 G4double G4HETCDeuteron::GetAlpha()
00045 {
00046   G4double C = 0.0;
00047   G4int aZ = GetZ() + GetRestZ();
00048   if (aZ >= 70) 
00049     {
00050       C = 0.10;
00051     } 
00052   else 
00053     {
00054       C = ((((0.15417e-06*aZ) - 0.29875e-04)*aZ + 0.21071e-02)*aZ - 0.66612e-01)*aZ + 0.98375; 
00055     }
00056   return 1.0 + C/2.0;
00057 }
00058   
00059 G4double G4HETCDeuteron::GetBeta()
00060 {
00061   return -GetCoulombBarrier();
00062 }
00063 
00064 G4double G4HETCDeuteron::GetSpinFactor()
00065 {
00066   // 2s+1
00067   return 3.0;
00068 }
00069 
00070 G4double G4HETCDeuteron::K(const G4Fragment & aFragment)
00071 {
00072   // Number of protons in emitted fragment
00073   G4int Pa = GetZ();
00074   // Number of neutrons in emitted fragment 
00075   G4int Na = GetA() - Pa;
00076 
00077   G4int TargetZ = GetRestZ();
00078   G4int TargetA = GetRestA();
00079   G4double r = G4double(TargetZ)/G4double(TargetA);
00080   
00081   G4int P = aFragment.GetNumberOfParticles();
00082   G4int H = aFragment.GetNumberOfHoles();
00083 
00084   G4double result = 0.0;
00085   if (P > 1)
00086     {
00087       result = 2.0* (H*(H-1.0)*r*(r-1.0)+H*(Na*r+Pa*(1.0-r)) + Pa*Na)/(P*(P-1.0));
00088 
00089       result /= r*(1.0 - r);
00090     }
00091   return std::max(0.0,result);
00092 }

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