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25 //
26 //
27 //
28 // by V. Lara
29 // --------------------------------------------------------------------
30 //
31 // Modified:
32 // 25.07.08 I.Pshenichnov (in collaboration with Alexander Botvina and Igor
33 // Mishustin (FIAS, Frankfurt, INR, Moscow and Kurchatov Institute,
34 // Moscow, pshenich@fias.uni-frankfurt.de) fixed infinite loop for
35 // a fagment with Z=A; fixed memory leak
36
37 #include "G4StatMFMacroCanonical.hh"
38 #include "G4PhysicalConstants.hh"
39 #include "G4SystemOfUnits.hh"
40 #include "G4Pow.hh"
41
42 // constructor
43 G4StatMFMacroCanonical::G4StatMFMacroCanonical(const G4Fragment & theFragment)
44 {
45
46 // Get memory for clusters
47 _theClusters.push_back(new G4StatMFMacroNucleon); // Size 1
48 _theClusters.push_back(new G4StatMFMacroBiNucleon); // Size 2
49 _theClusters.push_back(new G4StatMFMacroTriNucleon); // Size 3
50 _theClusters.push_back(new G4StatMFMacroTetraNucleon); // Size 4
51 for (G4int i = 4; i < theFragment.GetA_asInt(); i++)
52 _theClusters.push_back(new G4StatMFMacroMultiNucleon(i+1)); // Size 5 ... A
53
54 // Perform class initialization
55 Initialize(theFragment);
56
57 }
58
59 // destructor
60 G4StatMFMacroCanonical::~G4StatMFMacroCanonical()
61 {
62 // garbage collection
63 if (!_theClusters.empty())
64 {
65 std::for_each(_theClusters.begin(),_theClusters.end(),DeleteFragment());
66 }
67 }
68
69 // Initialization method
70 void G4StatMFMacroCanonical::Initialize(const G4Fragment & theFragment)
71 {
72
73 G4int A = theFragment.GetA_asInt();
74 G4int Z = theFragment.GetZ_asInt();
75 G4double x = 1.0 - 2.0*Z/G4double(A);
76 G4Pow* g4calc = G4Pow::GetInstance();
77
78 // Free Internal energy at T = 0
79 __FreeInternalE0 = A*( -G4StatMFParameters::GetE0() + // Volume term (for T = 0)
80 G4StatMFParameters::GetGamma0()*x*x) // Symmetry term
81 + G4StatMFParameters::GetBeta0()*g4calc->Z23(A) + // Surface term (for T = 0)
82 0.6*elm_coupling*Z*Z/(G4StatMFParameters::Getr0()* // Coulomb term
83 g4calc->Z13(A));
84
85 CalculateTemperature(theFragment);
86 return;
87 }
88
89 void G4StatMFMacroCanonical::CalculateTemperature(const G4Fragment & theFragment)
90 {
91 // Excitation Energy
92 G4double U = theFragment.GetExcitationEnergy();
93
94 G4int A = theFragment.GetA_asInt();
95 G4int Z = theFragment.GetZ_asInt();
96
97 // Fragment Multiplicity
98 G4double FragMult = std::max((1.0+(2.31/MeV)*(U/A - 3.5*MeV))*A/100.0, 2.0);
99
100 // Parameter Kappa
101 G4Pow* g4calc = G4Pow::GetInstance();
102 _Kappa = (1.0+elm_coupling*(g4calc->A13(FragMult)-1)/
103 (G4StatMFParameters::Getr0()*g4calc->Z13(A)));
104 _Kappa = _Kappa*_Kappa*_Kappa - 1.0;
105
106 G4StatMFMacroTemperature * theTemp = new
107 G4StatMFMacroTemperature(A,Z,U,__FreeInternalE0,_Kappa,&_theClusters);
108
109 __MeanTemperature = theTemp->CalcTemperature();
110 _ChemPotentialNu = theTemp->GetChemicalPotentialNu();
111 _ChemPotentialMu = theTemp->GetChemicalPotentialMu();
112 __MeanMultiplicity = theTemp->GetMeanMultiplicity();
113 __MeanEntropy = theTemp->GetEntropy();
114
115 delete theTemp;
116
117 return;
118 }
119
120 // --------------------------------------------------------------------------
121
122 G4StatMFChannel * G4StatMFMacroCanonical::ChooseAandZ(const G4Fragment &theFragment)
123 // Calculate total fragments multiplicity, fragment atomic numbers and charges
124 {
125 G4int A = theFragment.GetA_asInt();
126 G4int Z = theFragment.GetZ_asInt();
127
128 std::vector<G4int> ANumbers(A);
129
130 G4double Multiplicity = ChooseA(A,ANumbers);
131
132 std::vector<G4int> FragmentsA;
133
134 G4int i = 0;
135 for (i = 0; i < A; i++)
136 {
137 for (G4int j = 0; j < ANumbers[i]; j++) FragmentsA.push_back(i+1);
138 }
139
140 // Sort fragments in decreasing order
141 G4int im = 0;
142 for (G4int j = 0; j < Multiplicity; j++)
143 {
144 G4int FragmentsAMax = 0;
145 im = j;
146 for (i = j; i < Multiplicity; i++)
147 {
148 if (FragmentsA[i] <= FragmentsAMax) { continue; }
149 else
150 {
151 im = i;
152 FragmentsAMax = FragmentsA[im];
153 }
154 }
155 if (im != j)
156 {
157 FragmentsA[im] = FragmentsA[j];
158 FragmentsA[j] = FragmentsAMax;
159 }
160 }
161 return ChooseZ(Z,FragmentsA);
162 }
163
164 G4double G4StatMFMacroCanonical::ChooseA(G4int A, std::vector<G4int> & ANumbers)
165 // Determines fragments multiplicities and compute total fragment multiplicity
166 {
167 G4double multiplicity = 0.0;
168 G4int i;
169
170 std::vector<G4double> AcumMultiplicity;
171 AcumMultiplicity.reserve(A);
172
173 AcumMultiplicity.push_back((*(_theClusters.begin()))->GetMeanMultiplicity());
174 for (std::vector<G4VStatMFMacroCluster*>::iterator it = _theClusters.begin()+1;
175 it != _theClusters.end(); ++it)
176 {
177 AcumMultiplicity.push_back((*it)->GetMeanMultiplicity()+AcumMultiplicity.back());
178 }
179
180 G4int CheckA;
181 do {
182 CheckA = -1;
183 G4int SumA = 0;
184 G4int ThisOne = 0;
185 multiplicity = 0.0;
186 for (i = 0; i < A; i++) ANumbers[i] = 0;
187 do {
188 G4double RandNumber = G4UniformRand()*__MeanMultiplicity;
189 for (i = 0; i < A; i++) {
190 if (RandNumber < AcumMultiplicity[i]) {
191 ThisOne = i;
192 break;
193 }
194 }
195 multiplicity++;
196 ANumbers[ThisOne] = ANumbers[ThisOne]+1;
197 SumA += ThisOne+1;
198 CheckA = A - SumA;
199
200 // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
201 } while (CheckA > 0);
202
203 // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
204 } while (CheckA < 0 || std::abs(__MeanMultiplicity - multiplicity) > std::sqrt(__MeanMultiplicity) + 0.5);
205
206 return multiplicity;
207 }
208
209 G4StatMFChannel * G4StatMFMacroCanonical::ChooseZ(G4int & Z,
210 std::vector<G4int> & FragmentsA)
211 //
212 {
213 G4Pow* g4calc = G4Pow::GetInstance();
214 std::vector<G4int> FragmentsZ;
215
216 G4int DeltaZ = 0;
217 G4double CP = G4StatMFParameters::GetCoulomb();
218 G4int multiplicity = (G4int)FragmentsA.size();
219
220 do {
221 FragmentsZ.clear();
222 G4int SumZ = 0;
223 for (G4int i = 0; i < multiplicity; ++i)
224 {
225 G4int A = FragmentsA[i];
226 if (A <= 1)
227 {
228 G4double RandNumber = G4UniformRand();
229 if (RandNumber < (*_theClusters.begin())->GetZARatio())
230 {
231 FragmentsZ.push_back(1);
232 SumZ += FragmentsZ[i];
233 }
234 else FragmentsZ.push_back(0);
235 }
236 else
237 {
238 G4double RandZ;
239 G4double CC = 8.0*G4StatMFParameters::GetGamma0()
240 + 2*CP*g4calc->Z23(FragmentsA[i]);
241 G4double ZMean;
242 if (FragmentsA[i] > 1 && FragmentsA[i] < 5) { ZMean = 0.5*FragmentsA[i]; }
243 else {
244 ZMean = FragmentsA[i]*(4.0*G4StatMFParameters::GetGamma0()
245 + _ChemPotentialNu)/CC;
246 }
247 G4double ZDispersion = std::sqrt(FragmentsA[i]*__MeanTemperature/CC);
248 G4int z;
249 do
250 {
251 RandZ = G4RandGauss::shoot(ZMean,ZDispersion);
252 z = G4lrint(RandZ+0.5);
253 // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
254 } while (z < 0 || z > A);
255 FragmentsZ.push_back(z);
256 SumZ += z;
257 }
258 }
259 DeltaZ = Z - SumZ;
260 // Loop checking, 05-Aug-2015, Vladimir Ivanchenko
261 } while (std::abs(DeltaZ) > 1);
262
263 // DeltaZ can be 0, 1 or -1
264 G4int idx = 0;
265 if (DeltaZ < 0.0)
266 {
267 while (FragmentsZ[idx] < 1) { ++idx; }
268 }
269 FragmentsZ[idx] += DeltaZ;
270
271 G4StatMFChannel * theChannel = new G4StatMFChannel;
272 for (G4int i = multiplicity-1; i >= 0; --i)
273 {
274 theChannel->CreateFragment(FragmentsA[i],FragmentsZ[i]);
275 }
276
277 return theChannel;
278 }
279