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26 // 26 //
27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class file 29 // GEANT4 Class file
30 // 30 //
31 // 31 //
32 // File name: G4EmElementSelector 32 // File name: G4EmElementSelector
33 // 33 //
34 // Author: Vladimir Ivanchenko 34 // Author: Vladimir Ivanchenko
35 // 35 //
36 // Creation date: 29.05.2008 36 // Creation date: 29.05.2008
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 39 //
40 // Class Description: 40 // Class Description:
41 // 41 //
42 // Generic helper class for the random selecti 42 // Generic helper class for the random selection of an element
43 43
44 // ------------------------------------------- 44 // -------------------------------------------------------------------
45 // 45 //
46 46
47 #include "G4EmElementSelector.hh" 47 #include "G4EmElementSelector.hh"
48 #include "G4VEmModel.hh" 48 #include "G4VEmModel.hh"
49 #include "G4SystemOfUnits.hh" 49 #include "G4SystemOfUnits.hh"
50 50
51 //....oooOO0OOooo........oooOO0OOooo........oo 51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
52 //....oooOO0OOooo........oooOO0OOooo........oo 52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53 53
54 G4EmElementSelector::G4EmElementSelector(G4VEm 54 G4EmElementSelector::G4EmElementSelector(G4VEmModel* mod,
55 const 55 const G4Material* mat,
56 G4int 56 G4int bins,
57 G4dou 57 G4double emin,
58 G4dou 58 G4double emax,
59 G4boo 59 G4bool):
60 model(mod), material(mat), nbins(bins), cutE 60 model(mod), material(mat), nbins(bins), cutEnergy(-1.0),
61 lowEnergy(emin), highEnergy(emax) 61 lowEnergy(emin), highEnergy(emax)
62 { 62 {
63 G4int n = (G4int)material->GetNumberOfElemen << 63 G4int n = material->GetNumberOfElements();
64 nElmMinusOne = n - 1; 64 nElmMinusOne = n - 1;
65 theElementVector = material->GetElementVecto 65 theElementVector = material->GetElementVector();
66 if(nElmMinusOne > 0) { 66 if(nElmMinusOne > 0) {
67 xSections.reserve(n); 67 xSections.reserve(n);
68 auto v0 = new G4PhysicsLogVector(lowEnergy << 68 G4PhysicsLogVector* v0 = new G4PhysicsLogVector(lowEnergy,highEnergy,nbins);
69 xSections.push_back(v0); 69 xSections.push_back(v0);
>> 70 v0->SetSpline(false);
70 for(G4int i=1; i<n; ++i) { 71 for(G4int i=1; i<n; ++i) {
71 auto v = new G4PhysicsLogVector(*v0); << 72 G4PhysicsLogVector* v = new G4PhysicsLogVector(*v0);
72 xSections.push_back(v); 73 xSections.push_back(v);
73 } 74 }
74 } 75 }
75 /* 76 /*
76 G4cout << "G4EmElementSelector for " << mat- 77 G4cout << "G4EmElementSelector for " << mat->GetName() << " n= " << n
77 << " nbins= " << nbins << " Emin= " 78 << " nbins= " << nbins << " Emin= " << lowEnergy
78 << " Emax= " << highEnergy << G4endl; 79 << " Emax= " << highEnergy << G4endl;
79 */ 80 */
80 } 81 }
81 82
82 //....oooOO0OOooo........oooOO0OOooo........oo 83 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
83 84
84 G4EmElementSelector::~G4EmElementSelector() 85 G4EmElementSelector::~G4EmElementSelector()
85 { 86 {
86 if(nElmMinusOne > 0) { 87 if(nElmMinusOne > 0) {
87 for(G4int i=0; i<=nElmMinusOne; ++i) { del 88 for(G4int i=0; i<=nElmMinusOne; ++i) { delete xSections[i]; }
88 } 89 }
89 } 90 }
90 91
91 //....oooOO0OOooo........oooOO0OOooo........oo 92 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
92 93
93 void G4EmElementSelector::Initialise(const G4P 94 void G4EmElementSelector::Initialise(const G4ParticleDefinition* part,
94 G4double 95 G4double cut)
95 { 96 {
96 //G4cout << "G4EmElementSelector initialise 97 //G4cout << "G4EmElementSelector initialise for " << material->GetName()
97 // << G4endl; 98 // << G4endl;
98 if(0 == nElmMinusOne || cut == cutEnergy) { 99 if(0 == nElmMinusOne || cut == cutEnergy) { return; }
99 100
100 cutEnergy = cut; 101 cutEnergy = cut;
101 //G4cout << "cut(keV)= " << cut/keV << G4end 102 //G4cout << "cut(keV)= " << cut/keV << G4endl;
102 G4double cross; 103 G4double cross;
103 104
104 const G4double* theAtomNumDensityVector = 105 const G4double* theAtomNumDensityVector =
105 material->GetVecNbOfAtomsPerVolume(); 106 material->GetVecNbOfAtomsPerVolume();
106 107
107 // loop over bins 108 // loop over bins
108 for(G4int j=0; j<=nbins; ++j) { 109 for(G4int j=0; j<=nbins; ++j) {
109 G4double e = (xSections[0])->Energy(j); 110 G4double e = (xSections[0])->Energy(j);
110 model->SetupForMaterial(part, material, e) 111 model->SetupForMaterial(part, material, e);
111 cross = 0.0; 112 cross = 0.0;
112 //G4cout << "j= " << j << " e(MeV)= " << e 113 //G4cout << "j= " << j << " e(MeV)= " << e/MeV << G4endl;
113 for (G4int i=0; i<=nElmMinusOne; ++i) { 114 for (G4int i=0; i<=nElmMinusOne; ++i) {
114 cross += theAtomNumDensityVector[i]* 115 cross += theAtomNumDensityVector[i]*
115 model->ComputeCrossSectionPerAtom(part 116 model->ComputeCrossSectionPerAtom(part, (*theElementVector)[i], e,
116 cutE 117 cutEnergy, e);
117 xSections[i]->PutValue(j, cross); 118 xSections[i]->PutValue(j, cross);
118 } 119 }
119 } 120 }
>> 121
120 // xSections start from null, so use probabi 122 // xSections start from null, so use probabilities from the next bin
121 if(0.0 == (*xSections[nElmMinusOne])[0]) { 123 if(0.0 == (*xSections[nElmMinusOne])[0]) {
122 for (G4int i=0; i<=nElmMinusOne; ++i) { 124 for (G4int i=0; i<=nElmMinusOne; ++i) {
123 xSections[i]->PutValue(0, (*xSections[i] 125 xSections[i]->PutValue(0, (*xSections[i])[1]);
124 } 126 }
125 } 127 }
126 // xSections ends with null, so use probabil 128 // xSections ends with null, so use probabilities from the previous bin
127 if(0.0 == (*xSections[nElmMinusOne])[nbins]) 129 if(0.0 == (*xSections[nElmMinusOne])[nbins]) {
128 for (G4int i=0; i<=nElmMinusOne; ++i) { 130 for (G4int i=0; i<=nElmMinusOne; ++i) {
129 xSections[i]->PutValue(nbins, (*xSection 131 xSections[i]->PutValue(nbins, (*xSections[i])[nbins-1]);
130 } 132 }
131 } 133 }
132 // perform normalization 134 // perform normalization
133 for(G4int j=0; j<=nbins; ++j) { 135 for(G4int j=0; j<=nbins; ++j) {
134 cross = (*xSections[nElmMinusOne])[j]; 136 cross = (*xSections[nElmMinusOne])[j];
135 // only for positive X-section 137 // only for positive X-section
136 if(cross > 0.0) { 138 if(cross > 0.0) {
137 for (G4int i=0; i<nElmMinusOne; ++i) { 139 for (G4int i=0; i<nElmMinusOne; ++i) {
138 G4double x = (*xSections[i])[j]/cross; 140 G4double x = (*xSections[i])[j]/cross;
139 xSections[i]->PutValue(j, x); 141 xSections[i]->PutValue(j, x);
140 } 142 }
141 } 143 }
142 } 144 }
143 /* << 145 //G4cout << "======== G4EmElementSelector for the " << model->GetName()
144 G4cout << "======== G4EmElementSelector for << 146 // << G4endl;
145 << G4endl; <<
146 for (G4int i=0; i<=nElmMinusOne; ++i) { <<
147 G4cout << "#### i=" << i << G4endl; <<
148 G4cout << (*xSections[i]) << G4endl; <<
149 } <<
150 */ <<
151 } <<
152 <<
153 //....oooOO0OOooo........oooOO0OOooo........oo <<
154 <<
155 const G4Element* <<
156 G4EmElementSelector::SelectRandomAtom(const G4 <<
157 const G4 <<
158 { <<
159 const G4Element* element = (*theElementVecto <<
160 if (nElmMinusOne > 0) { <<
161 // 1. Determine energy index (only once) <<
162 // handle cases below/above the enrgy grid <<
163 // ekin = x[0] if e<=x[0] and idx will <<
164 // ekin = x[N-1] if e>=x[N-1] and idx will <<
165 G4double ekin = e; <<
166 std::size_t idx = 0; <<
167 if(e <= (xSections[0])->Energy(0)) { <<
168 ekin = (xSections[0])->Energy(0); <<
169 } else if(e < (xSections[0])->GetMaxEnergy <<
170 idx = (xSections[0])->ComputeLogVectorBi <<
171 } else { <<
172 ekin = (xSections[0])->GetMaxEnergy(); <<
173 idx = (xSections[0])->GetVectorLength() <<
174 } <<
175 // 2. Do the linear interp.(corner cases a <<
176 const G4double x1 = (xSections[0])->Energy <<
177 const G4double a = (ekin - x1)/((xSection <<
178 const G4double urnd = G4UniformRand(); <<
179 for (G4int i = 0; i < nElmMinusOne; ++i) { <<
180 const G4double y1 = (*xSections[i])[idx <<
181 if (urnd <= y1 + a*((*xSections[i])[idx+ <<
182 element = (*theElementVector)[i]; <<
183 break; <<
184 } <<
185 } <<
186 } <<
187 return element; <<
188 } 147 }
189 148
190 //....oooOO0OOooo........oooOO0OOooo........oo 149 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
191 150
192 void G4EmElementSelector::Dump(const G4Particl 151 void G4EmElementSelector::Dump(const G4ParticleDefinition* part)
193 { 152 {
194 G4cout << "======== G4EmElementSelector for 153 G4cout << "======== G4EmElementSelector for the " << model->GetName();
195 if(part) G4cout << " and " << part->GetParti 154 if(part) G4cout << " and " << part->GetParticleName();
196 G4cout << " for " << material->GetName() << 155 G4cout << " for " << material->GetName() << " ========" << G4endl;
197 if(0 < nElmMinusOne) { 156 if(0 < nElmMinusOne) {
198 for(G4int i=0; i<nElmMinusOne; i++) { 157 for(G4int i=0; i<nElmMinusOne; i++) {
199 G4cout << " " << (*theElementVector 158 G4cout << " " << (*theElementVector)[i]->GetName() << " : " << G4endl;
200 G4cout << *(xSections[i]) << G4endl; 159 G4cout << *(xSections[i]) << G4endl;
201 } 160 }
202 } 161 }
203 G4cout << "Last Element in element vector " 162 G4cout << "Last Element in element vector "
204 << (*theElementVector)[nElmMinusOne]- 163 << (*theElementVector)[nElmMinusOne]->GetName()
205 << G4endl; 164 << G4endl;
206 G4cout << G4endl; 165 G4cout << G4endl;
207 } 166 }
208 167
209 //....oooOO0OOooo........oooOO0OOooo........oo 168 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
210 169
211 170
212 171