Geant4  9.6.p02
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G4HETCTriton.cc
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25 //
26 // $Id$
27 //
28 // by V. Lara
29 //
30 // Modified:
31 // 23.08.2010 V.Ivanchenko general cleanup, move constructor and destructor
32 // the source, use G4Pow
33 
34 #include "G4HETCTriton.hh"
35 #include "G4Triton.hh"
36 
38  : G4HETCChargedFragment(G4Triton::Triton(), &theTritonCoulombBarrier)
39 {}
40 
42 {}
43 
45 {
46  G4double C = 0.0;
47  G4int aZ = GetZ() + GetRestZ();
48  if (aZ >= 70)
49  {
50  C = 0.10;
51  }
52  else
53  {
54  C = ((((0.15417e-06*aZ) - 0.29875e-04)*aZ + 0.21071e-02)*aZ - 0.66612e-01)*aZ + 0.98375;
55  }
56 
57  return 1.0 + C/3.0;
58 }
59 
61 {
62  return -GetCoulombBarrier();
63 }
64 
66 {
67  // 2s+1
68  return 2.0;
69 }
70 
72 {
73  // Number of protons in emitted fragment
74  G4int Pa = GetZ();
75  // Number of neutrons in emitted fragment
76  G4int Na = GetA() - Pa;
77 
78  G4int TargetZ = GetRestZ();
79  G4int TargetA = GetRestA();
80  G4double r = G4double(TargetZ)/G4double(TargetA);
81 
82  G4int P = aFragment.GetNumberOfParticles();
83  G4int H = aFragment.GetNumberOfHoles();
84 
85  G4double result = 0.0;
86  if (P > 2)
87  {
88  result = 3.0/(P*(P-1.0)*(P-2.0)) *
89  (H*(H-1.0)*(H-2.0)*r*(r-1.0)*(r-1.0) +
90  H*(H-1.0)*(2.0*Na*r*(1.0-r)+Pa*(1.0-r)*(1.0-r)) +
91  H*(Na*(Na-1.0)*r+2.0*Na*Pa*(1.0-r)) +
92  Pa*Na*(Na-1.0));
93 
94  result /= 3.0*r*(1.0 - r)*(1.0 - r);
95  }
96  return std::max(0.0,result);
97 }