| Geant4 Cross Reference |
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25 //
26 //
27
28 #include "globals.hh"
29 #include "G4SystemOfUnits.hh"
30 #include "G4HadronicException.hh"
31 #include "G4ios.hh"
32 #include "G4Pow.hh"
33 #include "G4VCrossSectionSource.hh"
34 #include "G4ParticleDefinition.hh"
35 #include "G4KineticTrack.hh"
36 #include "G4CrossSectionVector.hh"
37 #include "G4CrossSectionSourcePtr.hh"
38 #include "G4Proton.hh"
39 #include "G4Neutron.hh"
40
41 G4VCrossSectionSource::G4VCrossSectionSource()
42 { }
43
44
45 G4VCrossSectionSource::~G4VCrossSectionSource()
46 { }
47
48
49 const G4ParticleDefinition * G4VCrossSectionSource::
50 FindKeyParticle(const G4KineticTrack& trk1,const G4KineticTrack& trk2) const
51 {
52 const G4ParticleDefinition * result;
53
54 const G4ParticleDefinition * p1 = trk1.GetDefinition();
55 const G4ParticleDefinition * p2 = trk2.GetDefinition();
56
57 if( (p1==G4Proton::Proton() && p2==G4Proton::Proton() ) ||
58 (p1==G4Neutron::Neutron() && p2==G4Neutron::Neutron()) )
59 {
60 result = G4Proton::Proton();
61 }
62 else if( (p1==G4Neutron::Neutron() && p2==G4Proton::Proton()) ||
63 (p2==G4Neutron::Neutron() && p1==G4Proton::Proton()) )
64 {
65 result = G4Neutron::Neutron();
66 }
67 else
68 {
69 throw G4HadronicException(__FILE__, __LINE__, "G4VCrossSectionSource: unklnown particles in FindKeyParticle");
70 }
71 return result;
72 }
73
74 G4bool G4VCrossSectionSource::operator==(const G4VCrossSectionSource &right) const
75 {
76 return (this == (G4VCrossSectionSource *) &right);
77 }
78
79
80 G4bool G4VCrossSectionSource::operator!=(const G4VCrossSectionSource &right) const
81 {
82 return (this != (G4VCrossSectionSource *) &right);
83 }
84
85
86 void G4VCrossSectionSource::Print() const
87 {
88 std::size_t nComponents = 0;
89 const G4CrossSectionVector* components = GetComponents();
90 if (components)
91 {
92 nComponents = components->size();
93 }
94 G4cout << "---- " << this->Name() << " ---- has " << nComponents << " components" <<G4endl;
95 for (std::size_t i=0; i<nComponents; ++i)
96 {
97 G4cout << "-" << this->Name() << " - Component " << i << ": " <<G4endl;
98
99 G4CrossSectionSourcePtr componentPtr = (*components)[i];
100 G4VCrossSectionSource* component = componentPtr();
101 component->Print();
102 }
103 }
104
105
106 void G4VCrossSectionSource::PrintAll(const G4KineticTrack& trk1, const G4KineticTrack& trk2) const
107 {
108 G4double sqrtS = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag();
109 G4double sigma = CrossSection(trk1,trk2) / millibarn;
110 G4cout << "---- " << Name() << ": "
111 << "Ecm = " << sqrtS / GeV << " GeV - "
112 << " Cross section = " << sigma << " mb "
113 << G4endl;
114
115 std::size_t nComponents = 0;
116 const G4CrossSectionVector* components = GetComponents();
117 if (components != 0)
118 {
119 nComponents = components->size();
120 }
121 for (std::size_t i=0; i<nComponents; ++i)
122 {
123 G4cout << "* Component " << i << ": ";
124 G4CrossSectionSourcePtr componentPtr = (*components)[i];
125 G4VCrossSectionSource* component = componentPtr();
126 component->PrintAll(trk1,trk2);
127 }
128 }
129
130
131 G4bool G4VCrossSectionSource::InLimits(G4double e, G4double eLow, G4double eHigh) const
132 {
133 G4bool answer = false;
134 if (e >= eLow && e <= eHigh) answer = true;
135 return answer;
136 }
137
138 G4double G4VCrossSectionSource::LowLimit() const
139 {
140 return 0.;
141 }
142
143
144 G4double G4VCrossSectionSource::HighLimit() const
145 {
146 return DBL_MAX;
147 }
148
149 G4bool G4VCrossSectionSource::IsValid(G4double e) const
150 {
151 G4bool answer = false;
152 if (e >= LowLimit() && e <= HighLimit()) answer = true;
153 return answer;
154 }
155
156 const G4ParticleDefinition* G4VCrossSectionSource::FindLightParticle(const G4KineticTrack& trk1,
157 const G4KineticTrack& trk2) const
158 {
159 G4double mass1 = trk1.GetDefinition()->GetPDGMass();
160 G4double mass2 = trk2.GetDefinition()->GetPDGMass();
161 if (mass1 < mass2)
162 {
163 return trk1.GetDefinition();
164 }
165 else
166 {
167 return trk2.GetDefinition();
168 }
169 }
170
171
172 G4double G4VCrossSectionSource::FcrossX(G4double e, G4double e0,
173 G4double sigma, G4double eParam, G4double power) const
174 {
175 G4double result = 0.;
176
177 G4double denom = eParam*eParam + (e-e0)*(e-e0);
178 if (denom > 0.)
179 {
180 G4double value = (2.* eParam * sigma * (e-e0) / denom) * G4Pow::GetInstance()->powA(((e0 + eParam) / e), power);
181 result = std::max(0., value);
182 }
183 return result;
184 }
185
186
187
188
189