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25 // 25 //
26 // 26 //
27 // Hadronic Process: Nuclear De-excitations 27 // Hadronic Process: Nuclear De-excitations
28 // by V. Lara (Dec 1999) 28 // by V. Lara (Dec 1999)
29 // 29 //
30 // 14-11-2007 modified barrier by JMQ (test30) 30 // 14-11-2007 modified barrier by JMQ (test30)
31 // 15-11-2010 V.Ivanchenko use G4Pow and clean 31 // 15-11-2010 V.Ivanchenko use G4Pow and cleanup
32 32
33 #include "G4CoulombBarrier.hh" 33 #include "G4CoulombBarrier.hh"
34 #include "G4PhysicalConstants.hh" 34 #include "G4PhysicalConstants.hh"
35 #include "G4SystemOfUnits.hh" 35 #include "G4SystemOfUnits.hh"
>> 36 #include "G4Pow.hh"
36 #include "G4NuclearRadii.hh" 37 #include "G4NuclearRadii.hh"
37 38
38 G4CoulombBarrier::G4CoulombBarrier(G4int A, G4 39 G4CoulombBarrier::G4CoulombBarrier(G4int A, G4int Z)
39 : G4VCoulombBarrier(A, Z) << 40 : G4VCoulombBarrier(A, Z), g4calc(G4Pow::GetInstance())
40 { 41 {
41 factor = CLHEP::elm_coupling*Z; 42 factor = CLHEP::elm_coupling*Z;
42 SetParameters(0.4*G4NuclearRadii::RadiusCB(Z << 43 SetParameters(0.4*G4NuclearRadii::RadiusCB(Z, A),1.3*CLHEP::fermi);
43 } 44 }
44 45
>> 46 G4CoulombBarrier::~G4CoulombBarrier()
>> 47 {}
>> 48
45 G4double G4CoulombBarrier::GetCoulombBarrier( 49 G4double G4CoulombBarrier::GetCoulombBarrier(
46 G4int ARes, G4int ZRes, G4double U) c << 50 G4int ARes, G4int ZRes, G4double) const
47 { 51 {
48 if (0 == theZ) { return 0.0; } << 52 return factor*ZRes/(G4NuclearRadii::RadiusCB(ZRes,ARes) + GetRho());
49 G4double cb = factor*ZRes/(G4NuclearRadii::R << 53 //return factor*ZRes/((G4NuclearRadii::RadiusCB(ZRes,ARes)
50 if (U > 0.0) { cb /= (1.0 + std::sqrt( U/((2 << 54 // + GetRho())*(1.0 + std::sqrt(U/(G4double)(2*ARes))));
51 return cb; <<
52 } 55 }
53 56
54 G4double G4CoulombBarrier::BarrierPenetrationF 57 G4double G4CoulombBarrier::BarrierPenetrationFactor(G4int aZ) const
55 { 58 {
56 // Data comes from <<
57 // Dostrovsky, Fraenkel and Friedlander <<
58 // Physical Review, vol 116, num. 3 1959 <<
59 // <<
60 // const G4int size = 5; <<
61 // const G4double Zlist[size] = {10.0, 20.0, <<
62 // const G4double Kprot[size] = {0.42, 0.58, <<
63 // <<
64 G4double res = 1.0; 59 G4double res = 1.0;
65 if(theZ == 1) { << 60 if(GetZ() == 1) {
66 res = (aZ >= 70) ? 0.80 : 61 res = (aZ >= 70) ? 0.80 :
67 (((0.2357e-5*aZ) - 0.42679e-3)*aZ + 0.2703 62 (((0.2357e-5*aZ) - 0.42679e-3)*aZ + 0.27035e-1)*aZ + 0.19025;
68 res += 0.06*(theA - 1); << 63 res += 0.06*(GetA() - 1);
69 64
70 } else if(theZ == 2 && theA <= 4) { << 65 } else if(GetZ() == 2 && GetA() <= 4) {
71 res = (aZ >= 70) ? 0.98 : 66 res = (aZ >= 70) ? 0.98 :
72 (((0.23684e-5*aZ) - 0.42143e-3)*aZ + 0.252 67 (((0.23684e-5*aZ) - 0.42143e-3)*aZ + 0.25222e-1)*aZ + 0.46699;
73 res += 0.12*(4 - theA); << 68 res += 0.12*(4 - GetA());
74 } 69 }
75 return res; 70 return res;
76 } 71 }
77 72