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25 // 25 //
26 // 26 //
27 // 27 //
28 // Hadronic Process: Nuclear De-excitations 28 // Hadronic Process: Nuclear De-excitations
29 // by V. Lara 29 // by V. Lara
30 30
31 #include "G4StatMF.hh" 31 #include "G4StatMF.hh"
32 #include "G4PhysicalConstants.hh" 32 #include "G4PhysicalConstants.hh"
33 #include "G4SystemOfUnits.hh" 33 #include "G4SystemOfUnits.hh"
34 #include "G4Pow.hh" 34 #include "G4Pow.hh"
35 #include "G4PhysicsModelCatalog.hh" 35 #include "G4PhysicsModelCatalog.hh"
36 36
37 G4StatMF::G4StatMF() 37 G4StatMF::G4StatMF()
38 { 38 {
39 _secID = G4PhysicsModelCatalog::GetModelID(" 39 _secID = G4PhysicsModelCatalog::GetModelID("model_G4StatMF");
40 } 40 }
41 41
42 G4StatMF::~G4StatMF() {} 42 G4StatMF::~G4StatMF() {}
43 43
44 G4FragmentVector* G4StatMF::BreakItUp(const G4 44 G4FragmentVector* G4StatMF::BreakItUp(const G4Fragment &theFragment)
45 { 45 {
46 if (theFragment.GetExcitationEnergy() <= 0.0 46 if (theFragment.GetExcitationEnergy() <= 0.0) {
47 return nullptr; 47 return nullptr;
48 } 48 }
49 49
50 // Maximun average multiplicity: M_0 = 2.6 f 50 // Maximun average multiplicity: M_0 = 2.6 for A ~ 200
51 // and M_0 = 3.3 for A <= 110 51 // and M_0 = 3.3 for A <= 110
52 G4double MaxAverageMultiplicity = 52 G4double MaxAverageMultiplicity =
53 G4StatMFParameters::GetMaxAverageMultiplic 53 G4StatMFParameters::GetMaxAverageMultiplicity(theFragment.GetA_asInt());
54 54
55 55
56 // We'll use two kinds of ensembles 56 // We'll use two kinds of ensembles
57 G4StatMFMicroCanonical * theMicrocanonicalEn 57 G4StatMFMicroCanonical * theMicrocanonicalEnsemble = 0;
58 G4StatMFMacroCanonical * theMacrocanonicalEn 58 G4StatMFMacroCanonical * theMacrocanonicalEnsemble = 0;
59 59
60 //------------------------------------------ 60 //-------------------------------------------------------
61 // Direct simulation part (Microcanonical en 61 // Direct simulation part (Microcanonical ensemble)
62 //------------------------------------------ 62 //-------------------------------------------------------
63 63
64 // Microcanonical ensemble initialization 64 // Microcanonical ensemble initialization
65 theMicrocanonicalEnsemble = new G4StatMFMicr 65 theMicrocanonicalEnsemble = new G4StatMFMicroCanonical(theFragment);
66 66
67 G4int Iterations = 0; 67 G4int Iterations = 0;
68 G4int IterationsLimit = 100000; 68 G4int IterationsLimit = 100000;
69 G4double Temperature = 0.0; 69 G4double Temperature = 0.0;
70 70
71 G4bool FirstTime = true; 71 G4bool FirstTime = true;
72 G4StatMFChannel * theChannel = 0; 72 G4StatMFChannel * theChannel = 0;
73 73
74 G4bool ChannelOk; 74 G4bool ChannelOk;
75 do { // Try to de-excite as much as Iterati 75 do { // Try to de-excite as much as IterationLimit permits
76 do { 76 do {
77 77
78 G4double theMeanMult = theMicrocanonical 78 G4double theMeanMult = theMicrocanonicalEnsemble->GetMeanMultiplicity();
79 if (theMeanMult <= MaxAverageMultiplicit 79 if (theMeanMult <= MaxAverageMultiplicity) {
80 // G4cout << "MICROCANONICAL" << G4endl; 80 // G4cout << "MICROCANONICAL" << G4endl;
81 // Choose fragments atomic numbers and charg 81 // Choose fragments atomic numbers and charges from direct simulation
82 theChannel = theMicrocanonicalEnsemble->Choo 82 theChannel = theMicrocanonicalEnsemble->ChooseAandZ(theFragment);
83 _theEnsemble = theMicrocanonicalEnsemble; 83 _theEnsemble = theMicrocanonicalEnsemble;
84 } else { 84 } else {
85 //------------------------------------------ 85 //-----------------------------------------------------
86 // Non direct simulation part (Macrocanonica 86 // Non direct simulation part (Macrocanonical Ensemble)
87 //------------------------------------------ 87 //-----------------------------------------------------
88 if (FirstTime) { 88 if (FirstTime) {
89 // Macrocanonical ensemble initialization 89 // Macrocanonical ensemble initialization
90 theMacrocanonicalEnsemble = new G4StatMFMa 90 theMacrocanonicalEnsemble = new G4StatMFMacroCanonical(theFragment);
91 _theEnsemble = theMacrocanonicalEnsemble; 91 _theEnsemble = theMacrocanonicalEnsemble;
92 FirstTime = false; 92 FirstTime = false;
93 } 93 }
94 // G4cout << "MACROCANONICAL" << G4endl; 94 // G4cout << "MACROCANONICAL" << G4endl;
95 // Select calculated fragment total multipli 95 // Select calculated fragment total multiplicity,
96 // fragment atomic numbers and fragment char 96 // fragment atomic numbers and fragment charges.
97 theChannel = theMacrocanonicalEnsemble->Choo 97 theChannel = theMacrocanonicalEnsemble->ChooseAandZ(theFragment);
98 } 98 }
99 99
100 ChannelOk = theChannel->CheckFragments() 100 ChannelOk = theChannel->CheckFragments();
101 if (!ChannelOk) delete theChannel; 101 if (!ChannelOk) delete theChannel;
102 102
103 // Loop checking, 05-Aug-2015, Vladimir 103 // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
104 } while (!ChannelOk); 104 } while (!ChannelOk);
105 105
106 106
107 if (theChannel->GetMultiplicity() <= 1) { 107 if (theChannel->GetMultiplicity() <= 1) {
108 G4FragmentVector * theResult = new G4Fra 108 G4FragmentVector * theResult = new G4FragmentVector;
109 theResult->push_back(new G4Fragment(theF 109 theResult->push_back(new G4Fragment(theFragment));
110 delete theMicrocanonicalEnsemble; 110 delete theMicrocanonicalEnsemble;
111 if (theMacrocanonicalEnsemble != 0) dele 111 if (theMacrocanonicalEnsemble != 0) delete theMacrocanonicalEnsemble;
112 delete theChannel; 112 delete theChannel;
113 return theResult; 113 return theResult;
114 } 114 }
115 115
116 //-------------------------------------- 116 //--------------------------------------
117 // Second part of simulation procedure. 117 // Second part of simulation procedure.
118 //-------------------------------------- 118 //--------------------------------------
119 119
120 // Find temperature of breaking channel. 120 // Find temperature of breaking channel.
121 Temperature = _theEnsemble->GetMeanTempera 121 Temperature = _theEnsemble->GetMeanTemperature(); // Initial guess for Temperature
122 122
123 if (FindTemperatureOfBreakingChannel(theFr 123 if (FindTemperatureOfBreakingChannel(theFragment,theChannel,Temperature)) break;
124 124
125 // Do not forget to delete this unusable c 125 // Do not forget to delete this unusable channel, for which we failed to find the temperature,
126 // otherwise for very proton-reach nuclei 126 // otherwise for very proton-reach nuclei it would lead to memory leak due to large
127 // number of iterations. N.B. "theChannel" 127 // number of iterations. N.B. "theChannel" is created in G4StatMFMacroCanonical::ChooseZ()
128 128
129 // G4cout << " Iteration # " << Iterations 129 // G4cout << " Iteration # " << Iterations << " Mean Temperature = " << Temperature << G4endl;
130 130
131 delete theChannel; 131 delete theChannel;
132 132
133 // Loop checking, 05-Aug-2015, Vladimir Iv 133 // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
134 } while (Iterations++ < IterationsLimit ); 134 } while (Iterations++ < IterationsLimit );
135 135
136 // If Iterations >= IterationsLimit means th 136 // If Iterations >= IterationsLimit means that we couldn't solve for temperature
137 if (Iterations >= IterationsLimit) 137 if (Iterations >= IterationsLimit)
138 throw G4HadronicException(__FILE__, __LINE 138 throw G4HadronicException(__FILE__, __LINE__, "G4StatMF::BreakItUp: Was not possible to solve for temperature of breaking channel");
139 139
140 G4FragmentVector * theResult = theChannel-> 140 G4FragmentVector * theResult = theChannel->
141 GetFragments(theFragment.GetA_asInt(),theF 141 GetFragments(theFragment.GetA_asInt(),theFragment.GetZ_asInt(),Temperature);
142 142
143 // ~~~~~~ Energy conservation Patch !!!!!!!! 143 // ~~~~~~ Energy conservation Patch !!!!!!!!!!!!!!!!!!!!!!
144 // Original nucleus 4-momentum in CM system 144 // Original nucleus 4-momentum in CM system
145 G4LorentzVector InitialMomentum(theFragment. 145 G4LorentzVector InitialMomentum(theFragment.GetMomentum());
146 InitialMomentum.boost(-InitialMomentum.boost 146 InitialMomentum.boost(-InitialMomentum.boostVector());
147 G4double ScaleFactor = 0.0; 147 G4double ScaleFactor = 0.0;
148 G4double SavedScaleFactor = 0.0; 148 G4double SavedScaleFactor = 0.0;
149 do { 149 do {
150 G4double FragmentsEnergy = 0.0; 150 G4double FragmentsEnergy = 0.0;
151 for (auto const & ptr : *theResult) { << 151 G4FragmentVector::iterator j;
152 FragmentsEnergy += ptr->GetMomentum().e( << 152 for (j = theResult->begin(); j != theResult->end(); j++)
153 } << 153 FragmentsEnergy += (*j)->GetMomentum().e();
154 if (0.0 == FragmentsEnergy) { break; } <<
155 SavedScaleFactor = ScaleFactor; 154 SavedScaleFactor = ScaleFactor;
156 ScaleFactor = InitialMomentum.e()/Fragment 155 ScaleFactor = InitialMomentum.e()/FragmentsEnergy;
157 G4ThreeVector ScaledMomentum(0.0,0.0,0.0); 156 G4ThreeVector ScaledMomentum(0.0,0.0,0.0);
158 for (auto const & ptr : *theResult) { << 157 for (j = theResult->begin(); j != theResult->end(); j++) {
159 ScaledMomentum = ScaleFactor * ptr->GetM << 158 ScaledMomentum = ScaleFactor * (*j)->GetMomentum().vect();
160 G4double Mass = ptr->GetMomentum().mag() << 159 G4double Mass = (*j)->GetMomentum().m();
161 G4LorentzVector NewMomentum; 160 G4LorentzVector NewMomentum;
162 NewMomentum.setVect(ScaledMomentum); 161 NewMomentum.setVect(ScaledMomentum);
163 NewMomentum.setE(std::sqrt(ScaledMomentu 162 NewMomentum.setE(std::sqrt(ScaledMomentum.mag2()+Mass*Mass));
164 ptr->SetMomentum(NewMomentum); << 163 (*j)->SetMomentum(NewMomentum);
165 } 164 }
166 // Loop checking, 05-Aug-2015, Vladimir Iv 165 // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
167 } while (ScaleFactor > 1.0+1.e-5 && std::abs 166 } while (ScaleFactor > 1.0+1.e-5 && std::abs(ScaleFactor-SavedScaleFactor)/ScaleFactor > 1.e-10);
168 // ~~~~~~ End of patch !!!!!!!!!!!!!!!!!!!!! 167 // ~~~~~~ End of patch !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
169 168
170 // Perform Lorentz boost 169 // Perform Lorentz boost
171 G4FragmentVector::iterator i; 170 G4FragmentVector::iterator i;
172 for (i = theResult->begin(); i != theResult- 171 for (i = theResult->begin(); i != theResult->end(); i++) {
173 G4LorentzVector FourMom = (*i)->GetMomentu 172 G4LorentzVector FourMom = (*i)->GetMomentum();
174 FourMom.boost(theFragment.GetMomentum().bo 173 FourMom.boost(theFragment.GetMomentum().boostVector());
175 (*i)->SetMomentum(FourMom); 174 (*i)->SetMomentum(FourMom);
176 (*i)->SetCreatorModelID(_secID); 175 (*i)->SetCreatorModelID(_secID);
177 } 176 }
178 177
179 // garbage collection 178 // garbage collection
180 delete theMicrocanonicalEnsemble; 179 delete theMicrocanonicalEnsemble;
181 if (theMacrocanonicalEnsemble != 0) delete t 180 if (theMacrocanonicalEnsemble != 0) delete theMacrocanonicalEnsemble;
182 delete theChannel; 181 delete theChannel;
183 182
184 return theResult; 183 return theResult;
185 } 184 }
186 185
187 186
188 G4bool G4StatMF::FindTemperatureOfBreakingChan 187 G4bool G4StatMF::FindTemperatureOfBreakingChannel(const G4Fragment & theFragment,
189 const G4StatMFChannel * aChannel 188 const G4StatMFChannel * aChannel,
190 G4double & Temperature) 189 G4double & Temperature)
191 // This finds temperature of breaking channe 190 // This finds temperature of breaking channel.
192 { 191 {
193 G4int A = theFragment.GetA_asInt(); 192 G4int A = theFragment.GetA_asInt();
194 G4int Z = theFragment.GetZ_asInt(); 193 G4int Z = theFragment.GetZ_asInt();
195 G4double U = theFragment.GetExcitationEnergy 194 G4double U = theFragment.GetExcitationEnergy();
196 195
197 G4double T = std::max(Temperature,0.0012*MeV 196 G4double T = std::max(Temperature,0.0012*MeV);
198 G4double Ta = T; 197 G4double Ta = T;
199 G4double TotalEnergy = CalcEnergy(A,Z,aChann 198 G4double TotalEnergy = CalcEnergy(A,Z,aChannel,T);
200 199
201 G4double Da = (U - TotalEnergy)/U; 200 G4double Da = (U - TotalEnergy)/U;
202 G4double Db = 0.0; 201 G4double Db = 0.0;
203 202
204 // bracketing the solution 203 // bracketing the solution
205 if (Da == 0.0) { 204 if (Da == 0.0) {
206 Temperature = T; 205 Temperature = T;
207 return true; 206 return true;
208 } else if (Da < 0.0) { 207 } else if (Da < 0.0) {
209 do { 208 do {
210 T *= 0.5; 209 T *= 0.5;
211 if (T < 0.001*MeV) return false; 210 if (T < 0.001*MeV) return false;
212 211
213 TotalEnergy = CalcEnergy(A,Z,aChannel,T) 212 TotalEnergy = CalcEnergy(A,Z,aChannel,T);
214 213
215 Db = (U - TotalEnergy)/U; 214 Db = (U - TotalEnergy)/U;
216 // Loop checking, 05-Aug-2015, Vladimir 215 // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
217 } while (Db < 0.0); 216 } while (Db < 0.0);
218 217
219 } else { 218 } else {
220 do { 219 do {
221 T *= 1.5; 220 T *= 1.5;
222 221
223 TotalEnergy = CalcEnergy(A,Z,aChannel,T) 222 TotalEnergy = CalcEnergy(A,Z,aChannel,T);
224 223
225 Db = (U - TotalEnergy)/U; 224 Db = (U - TotalEnergy)/U;
226 // Loop checking, 05-Aug-2015, Vladimir 225 // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
227 } while (Db > 0.0); 226 } while (Db > 0.0);
228 } 227 }
229 228
230 G4double eps = 1.0e-14 * std::abs(T-Ta); 229 G4double eps = 1.0e-14 * std::abs(T-Ta);
231 //G4double eps = 1.0e-3 ; 230 //G4double eps = 1.0e-3 ;
232 231
233 // Start the bisection method 232 // Start the bisection method
234 for (G4int j = 0; j < 1000; j++) { 233 for (G4int j = 0; j < 1000; j++) {
235 G4double Tc = (Ta+T)*0.5; 234 G4double Tc = (Ta+T)*0.5;
236 if (std::abs(Ta-Tc) <= eps) { 235 if (std::abs(Ta-Tc) <= eps) {
237 Temperature = Tc; 236 Temperature = Tc;
238 return true; 237 return true;
239 } 238 }
240 239
241 T = Tc; 240 T = Tc;
242 TotalEnergy = CalcEnergy(A,Z,aChannel,T); 241 TotalEnergy = CalcEnergy(A,Z,aChannel,T);
243 G4double Dc = (U - TotalEnergy)/U; 242 G4double Dc = (U - TotalEnergy)/U;
244 243
245 if (Dc == 0.0) { 244 if (Dc == 0.0) {
246 Temperature = Tc; 245 Temperature = Tc;
247 return true; 246 return true;
248 } 247 }
249 if (Da*Dc < 0.0) { 248 if (Da*Dc < 0.0) {
250 T = Tc; 249 T = Tc;
251 Db = Dc; 250 Db = Dc;
252 } else { 251 } else {
253 Ta = Tc; 252 Ta = Tc;
254 Da = Dc; 253 Da = Dc;
255 } 254 }
256 } 255 }
257 256
258 Temperature = (Ta+T)*0.5; 257 Temperature = (Ta+T)*0.5;
259 return false; 258 return false;
260 } 259 }
261 260
262 G4double G4StatMF::CalcEnergy(G4int A, G4int Z 261 G4double G4StatMF::CalcEnergy(G4int A, G4int Z, const G4StatMFChannel * aChannel,
263 G4double T) 262 G4double T)
264 { 263 {
265 G4double MassExcess0 = G4NucleiProperties::G 264 G4double MassExcess0 = G4NucleiProperties::GetMassExcess(A,Z);
266 G4double ChannelEnergy = aChannel->GetFragme 265 G4double ChannelEnergy = aChannel->GetFragmentsEnergy(T);
267 return -MassExcess0 + G4StatMFParameters::Ge 266 return -MassExcess0 + G4StatMFParameters::GetCoulomb() + ChannelEnergy;
268 } 267 }
269 268
270 269
271 270
272 271