Geant4  10.03
G4CoulombBarrier.cc
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26 // $Id: G4CoulombBarrier.cc 100690 2016-10-31 11:25:43Z gcosmo $
27 //
28 // Hadronic Process: Nuclear De-excitations
29 // by V. Lara (Dec 1999)
30 //
31 // 14-11-2007 modified barrier by JMQ (test30)
32 // 15-11-2010 V.Ivanchenko use G4Pow and cleanup
33 
34 #include "G4CoulombBarrier.hh"
35 #include "G4PhysicalConstants.hh"
36 #include "G4SystemOfUnits.hh"
37 #include "G4Pow.hh"
38 
40  : G4VCoulombBarrier(A, Z)
41 {
43  if(Z > 0) {
44  G4double rho = 1.2*CLHEP::fermi;
45  G4double r0 = 1.5*CLHEP::fermi;
46  if(1 == A) {
47  rho = 0.0;
48  } else if(A <= 3) {
49  rho = 0.8*CLHEP::fermi;
50  r0 = 1.7*CLHEP::fermi;
51  } else {
52  r0 = 1.7*CLHEP::fermi;
53  }
54  SetParameters(rho, r0);
55  }
56 }
57 
59 {}
60 
62 {
63  return CLHEP::elm_coupling*(GetZ()*ZRes)/(GetR0()*g4calc->Z13(ARes) + GetRho());
64 }
65 
67 {
68  G4double res = 1.0;
69  if(GetZ() == 1) {
70  res = (aZ >= 70) ? 0.80 :
71  (((0.2357e-5*aZ) - 0.42679e-3)*aZ + 0.27035e-1)*aZ + 0.19025;
72  res += 0.06*(GetA() - 1);
73 
74  } else if(GetZ() == 2 && GetA() <= 4) {
75  res = (aZ >= 70) ? 0.98 :
76  (((0.23684e-5*aZ) - 0.42143e-3)*aZ + 0.25222e-1)*aZ + 0.46699;
77  res += 0.12*(4 - GetA());
78  }
79  return res;
80 }
static G4Pow * GetInstance()
Definition: G4Pow.cc:55
virtual ~G4CoulombBarrier()
G4double GetCoulombBarrier(G4int ARes, G4int ZRes, G4double U) const
G4int GetA(void) const
G4CoulombBarrier(G4int anA, G4int aZ)
G4double GetR0(void) const
int G4int
Definition: G4Types.hh:78
G4double Z13(G4int Z) const
Definition: G4Pow.hh:127
double A(double temperature)
void SetParameters(G4double rho, G4double r0)
G4double GetRho(void) const
G4int GetZ(void) const
double G4double
Definition: G4Types.hh:76
static constexpr double fermi
Definition: G4SIunits.hh:103
virtual G4double BarrierPenetrationFactor(G4int Eexc) const