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25 //
26 #include "globals.hh"
27 #include "G4ios.hh"
28 #include "G4Exp.hh"
29 #include "G4Log.hh"
30 #include "G4SystemOfUnits.hh"
31 #include "G4XNNElasticLowE.hh"
32 #include "G4KineticTrack.hh"
33 #include "G4ParticleDefinition.hh"
34 #include "G4PhysicsVector.hh"
35 #include "G4PhysicsLogVector.hh"
36 #include "G4Proton.hh"
37 #include "G4Neutron.hh"
38
39 const G4double G4XNNElasticLowE::_lowLimit = 0.;
40 const G4double G4XNNElasticLowE::_highLimit = 3.*GeV;
41
42 // Low energy limit of the cross-section table (in GeV)
43 // Units are assigned when filling the PhysicsVector
44 const G4double G4XNNElasticLowE::_eMinTable = 1.8964808;
45 const G4double G4XNNElasticLowE::_eStepLog = 0.01;
46
47 // Cross-sections in mb
48 // Units are assigned when filling the PhysicsVector
49
50 const G4int G4XNNElasticLowE::tableSize = 101;
51
52 const G4double G4XNNElasticLowE::ppTable[101] =
53 {
54 60.00, //was 0.
55 33.48, 26.76, 25.26, 24.55, 23.94, 23.77, 23.72, 23.98,
56 25.48, 27.52, 27.72, 27.21, 25.80, 26.00, 24.32, 23.81,
57 24.37, 24.36, 23.13, 22.43, 21.71, 21.01, 20.83, 20.74,
58 20.25, 20.10, 20.59, 20.04, 20.83, 20.84, 21.07, 20.83,
59 20.79, 21.88, 21.15, 20.92, 19.00, 18.60, 17.30, 17.00,
60 16.70, 16.50, 16.20, 15.80, 15.57, 15.20, 15.00, 14.60,
61 14.20, 14.00, 13.80, 13.60, 13.40, 13.20, 13.00, 12.85,
62 12.70, 12.60, 12.50, 12.40, 12.30, 12.20, 12.10, 12.00,
63 11.90, 11.80, 11.75, 11.70, 11.64, 11.53, 11.41, 11.31,
64 11.22, 11.13, 11.05, 10.97, 10.89, 10.82, 10.75, 10.68,
65 10.61, 10.54, 10.48, 10.41, 10.35, 10.28, 10.22, 10.16,
66 10.13, 10.10, 10.08, 10.05, 10.02, 9.99, 9.96, 9.93,
67 9.90, 9.87, 9.84, 9.80
68 };
69
70 const G4double G4XNNElasticLowE::npTable[101] =
71 {
72 1500.00, // was 0.
73 248.20, 93.38, 55.26, 44.50, 41.33, 38.48, 37.20, 35.98,
74 35.02, 34.47, 32.48, 30.76, 29.46, 28.53, 27.84, 27.20,
75 26.53, 25.95, 25.59, 25.46, 25.00, 24.49, 24.08, 23.86,
76 23.17, 22.70, 21.88, 21.48, 20.22, 19.75, 18.97, 18.39,
77 17.98, 17.63, 17.21, 16.72, 16.68, 16.58, 16.42, 16.22,
78 15.98, 15.71, 15.42, 15.14, 14.87, 14.65, 14.44, 14.26,
79 14.10, 13.95, 13.80, 13.64, 13.47, 13.29, 13.09, 12.89,
80 12.68, 12.47, 12.27, 12.06, 11.84, 11.76, 11.69, 11.60,
81 11.50, 11.41, 11.29, 11.17, 11.06, 10.93, 10.81, 10.68,
82 10.56, 10.44, 10.33, 10.21, 10.12, 10.03, 9.96, 9.89,
83 9.83, 9.80, 9.77, 9.75, 9.74, 9.74, 9.74, 9.76,
84 9.73, 9.70, 9.68, 9.65, 9.63, 9.60, 9.57, 9.55,
85 9.52, 9.49, 9.46, 9.43
86 };
87
88
89 G4XNNElasticLowE::G4XNNElasticLowE()
90 {
91 // Cross-sections are available in the range (_eMin,_eMax)
92
93 _eMin = _eMinTable * GeV;
94 _eMax = G4Exp(G4Log(_eMinTable) + tableSize * _eStepLog) * GeV;
95 if (_eMin < _lowLimit)
96 throw G4HadronicException(__FILE__, __LINE__, "G4XNNElasticLowE::G4XNNElasticLowE - Low energy limit not valid");
97 if (_highLimit > _eMax)
98 throw G4HadronicException(__FILE__, __LINE__, "G4XNNElasticLowE::G4XNNElasticLowE - High energy limit not valid");
99 G4PhysicsVector* pp = new G4PhysicsLogVector(_eMin,_eMax,tableSize);
100
101 _eMin = G4Exp(G4Log(_eMinTable)-_eStepLog)*GeV;
102 if (_eMin < _lowLimit)
103 throw G4HadronicException(__FILE__, __LINE__, "G4XNNElasticLowE::G4XNNElasticLowE - Low energy limit not valid");
104 G4PhysicsVector* np = new G4PhysicsLogVector(_eMin,_eMax,tableSize);
105
106 G4int i;
107 for (i=0; i<tableSize; i++)
108 {
109 G4double value = ppTable[i] * millibarn;
110 pp->PutValue(i,value);
111 value = npTable[i] * millibarn;
112 np->PutValue(i,value);
113 }
114 xMap[G4Proton::ProtonDefinition()] = pp;
115 xMap[G4Neutron::NeutronDefinition()] = np;
116 }
117
118
119 G4XNNElasticLowE::~G4XNNElasticLowE()
120 {
121 delete xMap[G4Proton::ProtonDefinition()];
122 delete xMap[G4Neutron::NeutronDefinition()];
123 }
124
125
126 G4bool G4XNNElasticLowE::operator==(const G4XNNElasticLowE &right) const
127 {
128 return (this == (G4XNNElasticLowE *) &right);
129 }
130
131
132 G4bool G4XNNElasticLowE::operator!=(const G4XNNElasticLowE &right) const
133 {
134
135 return (this != (G4XNNElasticLowE *) &right);
136 }
137
138
139 G4double G4XNNElasticLowE::CrossSection(const G4KineticTrack& trk1, const G4KineticTrack& trk2) const
140 {
141 G4double sigma = 0.;
142 G4double sqrtS = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag();
143 G4bool dummy = false;
144
145 const G4ParticleDefinition * key = FindKeyParticle(trk1,trk2);
146
147 typedef std::map <const G4ParticleDefinition *, G4PhysicsVector*, std::less<const G4ParticleDefinition *> > StringPhysMap;
148
149 if (xMap.find(key)!= xMap.end())
150 {
151
152 StringPhysMap::const_iterator iter;
153 for (iter = xMap.begin(); iter != xMap.end(); ++iter)
154 {
155 const G4ParticleDefinition * str = (*iter).first;
156 if (str == key)
157 {
158 G4PhysicsVector* physVector = (*iter).second;
159 // G4PhysicsVector* physVector = xMap[key];
160 if (sqrtS >= _eMin && sqrtS <= _eMax)
161 {
162 sigma = physVector->GetValue(sqrtS,dummy);
163 } else if ( sqrtS < _eMin )
164 {
165 sigma = physVector->GetValue(_eMin,dummy);
166 }
167 //G4cout << " sqrtS / sigma " << sqrtS/GeV << " / " <<
168 // sigma/millibarn << G4endl;
169 }
170 }
171 }
172 return sigma;
173 }
174
175
176 void G4XNNElasticLowE::Print() const
177 {
178 // Dump the pp cross-section table
179
180 G4cout << Name() << ", pp cross-section: " << G4endl;
181
182 G4bool dummy = false;
183 G4int i;
184 const G4ParticleDefinition * key = G4Proton::ProtonDefinition();
185 G4PhysicsVector* pp = 0;
186
187 typedef std::map <const G4ParticleDefinition *, G4PhysicsVector*, std::less<const G4ParticleDefinition *> > StringPhysMap;
188 StringPhysMap::const_iterator iter;
189
190 for (iter = xMap.begin(); iter != xMap.end(); ++iter)
191 {
192 const G4ParticleDefinition * str = (*iter).first;
193 if (str == key)
194 {
195 pp = (*iter).second;
196 }
197 }
198
199 if (pp != 0)
200 {
201 for (i=0; i<tableSize; i++)
202 {
203 G4double e = pp->GetLowEdgeEnergy(i);
204 G4double sigma = pp->GetValue(e,dummy) / millibarn;
205 G4cout << i << ") e = " << e / GeV << " GeV ---- Cross section = " << sigma << " mb " << G4endl;
206 }
207 }
208
209 // Dump the np cross-section table
210
211 G4cout << Name() << ", np cross-section: " << G4endl;
212
213 key = G4Neutron::NeutronDefinition();
214 G4PhysicsVector* np = 0;
215 for (iter = xMap.begin(); iter != xMap.end(); ++iter)
216 {
217 const G4ParticleDefinition * str = (*iter).first;
218 if (str == key)
219 {
220 np = (*iter).second;
221 }
222 }
223
224 // G4PhysicsVector* np = xMap[G4Neutron::NeutronDefinition()->GetParticleName()];
225
226 if (np != 0)
227 {
228 for (i=0; i<tableSize; i++)
229 {
230 G4double e = np->GetLowEdgeEnergy(i);
231 G4double sigma = np->GetValue(e,dummy) / millibarn;
232 G4cout << i << ") e = " << e / GeV << " GeV ---- Cross section = " << sigma << " mb " << G4endl;
233 }
234 }
235 G4VCrossSectionSource::Print();
236 }
237
238
239 G4String G4XNNElasticLowE::Name() const
240 {
241 G4String name("NNElasticLowE");
242 return name;
243 }
244
245
246
247 G4bool G4XNNElasticLowE::IsValid(G4double e) const
248 {
249 G4bool answer = InLimits(e,_lowLimit,_highLimit);
250
251 return answer;
252 }
253
254
255