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26 // 26 //
>> 27 // $Id: G4CoulombBarrier.cc,v 1.6 2006/06/29 20:28:21 gunter Exp $
>> 28 // GEANT4 tag $Name: geant4-08-03-patch-01 $
>> 29 //
27 // Hadronic Process: Nuclear De-excitations 30 // Hadronic Process: Nuclear De-excitations
28 // by V. Lara (Dec 1999) 31 // by V. Lara (Dec 1999)
29 // << 32
30 // 14-11-2007 modified barrier by JMQ (test30) <<
31 // 15-11-2010 V.Ivanchenko use G4Pow and clean <<
32 33
33 #include "G4CoulombBarrier.hh" 34 #include "G4CoulombBarrier.hh"
34 #include "G4PhysicalConstants.hh" << 35 #include "G4HadronicException.hh"
35 #include "G4SystemOfUnits.hh" << 36 #include <sstream>
36 #include "G4NuclearRadii.hh" << 37
>> 38 G4CoulombBarrier::G4CoulombBarrier(const G4CoulombBarrier & ) : G4VCoulombBarrier()
>> 39 {
>> 40 throw G4HadronicException(__FILE__, __LINE__, "G4CoulombBarrier::copy_constructor meant to not be accessable.");
>> 41 }
>> 42
>> 43
>> 44 const G4CoulombBarrier & G4CoulombBarrier::operator=(const G4CoulombBarrier & )
>> 45 {
>> 46 throw G4HadronicException(__FILE__, __LINE__, "G4CoulombBarrier::operator= meant to not be accessable.");
>> 47 return *this;
>> 48 }
37 49
38 G4CoulombBarrier::G4CoulombBarrier(G4int A, G4 << 50 G4bool G4CoulombBarrier::operator==(const G4CoulombBarrier & ) const
39 : G4VCoulombBarrier(A, Z) <<
40 { 51 {
41 factor = CLHEP::elm_coupling*Z; << 52 return false;
42 SetParameters(0.4*G4NuclearRadii::RadiusCB(Z <<
43 } 53 }
44 54
45 G4double G4CoulombBarrier::GetCoulombBarrier( << 55 G4bool G4CoulombBarrier::operator!=(const G4CoulombBarrier & ) const
46 G4int ARes, G4int ZRes, G4double U) c <<
47 { 56 {
48 if (0 == theZ) { return 0.0; } << 57 return true;
49 G4double cb = factor*ZRes/(G4NuclearRadii::R <<
50 if (U > 0.0) { cb /= (1.0 + std::sqrt( U/((2 <<
51 return cb; <<
52 } 58 }
53 59
54 G4double G4CoulombBarrier::BarrierPenetrationF << 60
>> 61
>> 62 G4double G4CoulombBarrier::GetCoulombBarrier(const G4int ARes, const G4int ZRes, const G4double U) const
>> 63 // Calculation of Coulomb potential energy (barrier) for outgoing fragment
55 { 64 {
56 // Data comes from << 65 G4double Barrier = 0.0;
57 // Dostrovsky, Fraenkel and Friedlander << 66 if (ZRes > ARes || ARes < 1) {
58 // Physical Review, vol 116, num. 3 1959 << 67 std::ostringstream errOs;
59 // << 68 errOs << "G4CoulombBarrier::GetCoulombBarrier: ";
60 // const G4int size = 5; << 69 errOs << "Wrong values for ";
61 // const G4double Zlist[size] = {10.0, 20.0, << 70 errOs << "residual nucleus A = " << ARes << " ";
62 // const G4double Kprot[size] = {0.42, 0.58, << 71 errOs << "and residual nucleus Z = " << ZRes << G4endl;
63 // << 72
64 G4double res = 1.0; << 73 throw G4HadronicException(__FILE__, __LINE__, errOs.str());
65 if(theZ == 1) { <<
66 res = (aZ >= 70) ? 0.80 : <<
67 (((0.2357e-5*aZ) - 0.42679e-3)*aZ + 0.2703 <<
68 res += 0.06*(theA - 1); <<
69 <<
70 } else if(theZ == 2 && theA <= 4) { <<
71 res = (aZ >= 70) ? 0.98 : <<
72 (((0.23684e-5*aZ) - 0.42143e-3)*aZ + 0.252 <<
73 res += 0.12*(4 - theA); <<
74 } 74 }
75 return res; << 75 if (GetA() == 1 && GetZ() == 0) {
>> 76 Barrier = 0.0; // Neutron Coulomb Barrier is 0
>> 77 } else {
>> 78 G4double CompoundRadius = CalcCompoundRadius(static_cast<G4double>(ZRes));
>> 79 Barrier = elm_coupling/CompoundRadius * static_cast<G4double>(GetZ())*static_cast<G4double>(ZRes)/
>> 80 (std::pow(static_cast<G4double>(GetA()),1./3.) + std::pow(static_cast<G4double>(ARes),1./3.));
>> 81
>> 82 // Barrier penetration coeficient
>> 83 G4double K = BarrierPenetrationFactor(ZRes);
>> 84
>> 85 Barrier *= K;
>> 86
>> 87 Barrier /= (1.0 + std::sqrt(U/(2.0*static_cast<G4double>(ARes))));
>> 88 }
>> 89 return Barrier;
76 } 90 }
>> 91
>> 92
>> 93
77 94