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>> 26 // $Id: G4EmElementSelector.cc 92921 2015-09-21 15:06:51Z gcosmo $
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class file 30 // GEANT4 Class file
30 // 31 //
31 // 32 //
32 // File name: G4EmElementSelector 33 // File name: G4EmElementSelector
33 // 34 //
34 // Author: Vladimir Ivanchenko 35 // Author: Vladimir Ivanchenko
35 // 36 //
36 // Creation date: 29.05.2008 37 // Creation date: 29.05.2008
37 // 38 //
38 // Modifications: 39 // Modifications:
39 // 40 //
40 // Class Description: 41 // Class Description:
41 // 42 //
42 // Generic helper class for the random selecti 43 // Generic helper class for the random selection of an element
43 44
44 // ------------------------------------------- 45 // -------------------------------------------------------------------
45 // 46 //
46 47
47 #include "G4EmElementSelector.hh" 48 #include "G4EmElementSelector.hh"
48 #include "G4VEmModel.hh" 49 #include "G4VEmModel.hh"
49 #include "G4SystemOfUnits.hh" 50 #include "G4SystemOfUnits.hh"
50 51
51 //....oooOO0OOooo........oooOO0OOooo........oo 52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
52 //....oooOO0OOooo........oooOO0OOooo........oo 53 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53 54
54 G4EmElementSelector::G4EmElementSelector(G4VEm 55 G4EmElementSelector::G4EmElementSelector(G4VEmModel* mod,
55 const 56 const G4Material* mat,
56 G4int 57 G4int bins,
57 G4dou 58 G4double emin,
58 G4dou 59 G4double emax,
59 G4boo 60 G4bool):
60 model(mod), material(mat), nbins(bins), cutE 61 model(mod), material(mat), nbins(bins), cutEnergy(-1.0),
61 lowEnergy(emin), highEnergy(emax) 62 lowEnergy(emin), highEnergy(emax)
62 { 63 {
63 G4int n = (G4int)material->GetNumberOfElemen << 64 G4int n = material->GetNumberOfElements();
64 nElmMinusOne = n - 1; 65 nElmMinusOne = n - 1;
65 theElementVector = material->GetElementVecto 66 theElementVector = material->GetElementVector();
66 if(nElmMinusOne > 0) { 67 if(nElmMinusOne > 0) {
67 xSections.reserve(n); 68 xSections.reserve(n);
68 auto v0 = new G4PhysicsLogVector(lowEnergy << 69 G4PhysicsLogVector* v0 = new G4PhysicsLogVector(lowEnergy,highEnergy,nbins);
69 xSections.push_back(v0); 70 xSections.push_back(v0);
>> 71 v0->SetSpline(false);
70 for(G4int i=1; i<n; ++i) { 72 for(G4int i=1; i<n; ++i) {
71 auto v = new G4PhysicsLogVector(*v0); << 73 G4PhysicsLogVector* v = new G4PhysicsLogVector(*v0);
72 xSections.push_back(v); 74 xSections.push_back(v);
73 } 75 }
74 } 76 }
75 /* 77 /*
76 G4cout << "G4EmElementSelector for " << mat- 78 G4cout << "G4EmElementSelector for " << mat->GetName() << " n= " << n
77 << " nbins= " << nbins << " Emin= " 79 << " nbins= " << nbins << " Emin= " << lowEnergy
78 << " Emax= " << highEnergy << G4endl; 80 << " Emax= " << highEnergy << G4endl;
79 */ 81 */
80 } 82 }
81 83
82 //....oooOO0OOooo........oooOO0OOooo........oo 84 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
83 85
84 G4EmElementSelector::~G4EmElementSelector() 86 G4EmElementSelector::~G4EmElementSelector()
85 { 87 {
86 if(nElmMinusOne > 0) { 88 if(nElmMinusOne > 0) {
87 for(G4int i=0; i<=nElmMinusOne; ++i) { del 89 for(G4int i=0; i<=nElmMinusOne; ++i) { delete xSections[i]; }
88 } 90 }
89 } 91 }
90 92
91 //....oooOO0OOooo........oooOO0OOooo........oo 93 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
92 94
93 void G4EmElementSelector::Initialise(const G4P 95 void G4EmElementSelector::Initialise(const G4ParticleDefinition* part,
94 G4double 96 G4double cut)
95 { 97 {
96 //G4cout << "G4EmElementSelector initialise 98 //G4cout << "G4EmElementSelector initialise for " << material->GetName()
97 // << G4endl; 99 // << G4endl;
98 if(0 == nElmMinusOne || cut == cutEnergy) { 100 if(0 == nElmMinusOne || cut == cutEnergy) { return; }
99 101
100 cutEnergy = cut; 102 cutEnergy = cut;
101 //G4cout << "cut(keV)= " << cut/keV << G4end 103 //G4cout << "cut(keV)= " << cut/keV << G4endl;
102 G4double cross; 104 G4double cross;
103 105
104 const G4double* theAtomNumDensityVector = 106 const G4double* theAtomNumDensityVector =
105 material->GetVecNbOfAtomsPerVolume(); 107 material->GetVecNbOfAtomsPerVolume();
106 108
107 // loop over bins 109 // loop over bins
108 for(G4int j=0; j<=nbins; ++j) { 110 for(G4int j=0; j<=nbins; ++j) {
109 G4double e = (xSections[0])->Energy(j); 111 G4double e = (xSections[0])->Energy(j);
110 model->SetupForMaterial(part, material, e) 112 model->SetupForMaterial(part, material, e);
111 cross = 0.0; 113 cross = 0.0;
112 //G4cout << "j= " << j << " e(MeV)= " << e 114 //G4cout << "j= " << j << " e(MeV)= " << e/MeV << G4endl;
113 for (G4int i=0; i<=nElmMinusOne; ++i) { 115 for (G4int i=0; i<=nElmMinusOne; ++i) {
114 cross += theAtomNumDensityVector[i]* 116 cross += theAtomNumDensityVector[i]*
115 model->ComputeCrossSectionPerAtom(part 117 model->ComputeCrossSectionPerAtom(part, (*theElementVector)[i], e,
116 cutE 118 cutEnergy, e);
117 xSections[i]->PutValue(j, cross); 119 xSections[i]->PutValue(j, cross);
118 } 120 }
119 } 121 }
>> 122
120 // xSections start from null, so use probabi 123 // xSections start from null, so use probabilities from the next bin
121 if(0.0 == (*xSections[nElmMinusOne])[0]) { 124 if(0.0 == (*xSections[nElmMinusOne])[0]) {
122 for (G4int i=0; i<=nElmMinusOne; ++i) { 125 for (G4int i=0; i<=nElmMinusOne; ++i) {
123 xSections[i]->PutValue(0, (*xSections[i] 126 xSections[i]->PutValue(0, (*xSections[i])[1]);
124 } 127 }
125 } 128 }
126 // xSections ends with null, so use probabil 129 // xSections ends with null, so use probabilities from the previous bin
127 if(0.0 == (*xSections[nElmMinusOne])[nbins]) 130 if(0.0 == (*xSections[nElmMinusOne])[nbins]) {
128 for (G4int i=0; i<=nElmMinusOne; ++i) { 131 for (G4int i=0; i<=nElmMinusOne; ++i) {
129 xSections[i]->PutValue(nbins, (*xSection 132 xSections[i]->PutValue(nbins, (*xSections[i])[nbins-1]);
130 } 133 }
131 } 134 }
132 // perform normalization 135 // perform normalization
133 for(G4int j=0; j<=nbins; ++j) { 136 for(G4int j=0; j<=nbins; ++j) {
134 cross = (*xSections[nElmMinusOne])[j]; 137 cross = (*xSections[nElmMinusOne])[j];
135 // only for positive X-section 138 // only for positive X-section
136 if(cross > 0.0) { 139 if(cross > 0.0) {
137 for (G4int i=0; i<nElmMinusOne; ++i) { 140 for (G4int i=0; i<nElmMinusOne; ++i) {
138 G4double x = (*xSections[i])[j]/cross; 141 G4double x = (*xSections[i])[j]/cross;
139 xSections[i]->PutValue(j, x); 142 xSections[i]->PutValue(j, x);
140 } 143 }
141 } 144 }
142 } 145 }
143 /* << 146 //G4cout << "======== G4EmElementSelector for the " << model->GetName()
144 G4cout << "======== G4EmElementSelector for << 147 // << 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 } 148 }
189 149
190 //....oooOO0OOooo........oooOO0OOooo........oo 150 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
191 151
192 void G4EmElementSelector::Dump(const G4Particl 152 void G4EmElementSelector::Dump(const G4ParticleDefinition* part)
193 { 153 {
194 G4cout << "======== G4EmElementSelector for 154 G4cout << "======== G4EmElementSelector for the " << model->GetName();
195 if(part) G4cout << " and " << part->GetParti 155 if(part) G4cout << " and " << part->GetParticleName();
196 G4cout << " for " << material->GetName() << 156 G4cout << " for " << material->GetName() << " ========" << G4endl;
197 if(0 < nElmMinusOne) { 157 if(0 < nElmMinusOne) {
198 for(G4int i=0; i<nElmMinusOne; i++) { 158 for(G4int i=0; i<nElmMinusOne; i++) {
199 G4cout << " " << (*theElementVector 159 G4cout << " " << (*theElementVector)[i]->GetName() << " : " << G4endl;
200 G4cout << *(xSections[i]) << G4endl; 160 G4cout << *(xSections[i]) << G4endl;
201 } 161 }
202 } 162 }
203 G4cout << "Last Element in element vector " 163 G4cout << "Last Element in element vector "
204 << (*theElementVector)[nElmMinusOne]- 164 << (*theElementVector)[nElmMinusOne]->GetName()
205 << G4endl; 165 << G4endl;
206 G4cout << G4endl; 166 G4cout << G4endl;
207 } 167 }
208 168
209 //....oooOO0OOooo........oooOO0OOooo........oo 169 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
210 170
211 171
212 172