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25 //
26 // Author: Zhuxin Li@CENBG
27 // 11 March 2020
28 // on the base of G4LivermoreGammaConversionModel
29 // derives from G4BetheHeitler5DModel
30 // -------------------------------------------------------------------
31
32 #include "G4LivermoreGammaConversion5DModel.hh"
33
34 #include "G4AutoLock.hh"
35 #include "G4Electron.hh"
36 #include "G4EmParameters.hh"
37 #include "G4Exp.hh"
38 #include "G4ParticleChangeForGamma.hh"
39 #include "G4PhysicalConstants.hh"
40 #include "G4PhysicsFreeVector.hh"
41 #include "G4SystemOfUnits.hh"
42
43 namespace
44 {
45 G4Mutex LivermoreGammaConversion5DModelMutex = G4MUTEX_INITIALIZER;
46 }
47
48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
50
51 G4PhysicsFreeVector* G4LivermoreGammaConversion5DModel::data[] = {nullptr};
52 G4String G4LivermoreGammaConversion5DModel::gDataDirectory = "";
53
54 G4LivermoreGammaConversion5DModel::G4LivermoreGammaConversion5DModel(const G4ParticleDefinition* p,
55 const G4String& nam)
56 : G4BetheHeitler5DModel(p, nam)
57 {
58 fParticleChange = nullptr;
59 lowEnergyLimit = 2. * CLHEP::electron_mass_c2;
60 verboseLevel = 0;
61 // Verbosity scale for debugging purposes:
62 // 0 = nothing
63 // 1 = calculation of cross sections, file openings...
64 // 2 = entering in methods
65 if (verboseLevel > 0) {
66 G4cout << "G4LivermoreGammaConversion5DModel is constructed " << G4endl;
67 }
68 }
69
70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
71
72 G4LivermoreGammaConversion5DModel::~G4LivermoreGammaConversion5DModel()
73 {
74 if (IsMaster()) {
75 for (G4int i = 0; i < maxZ; ++i) {
76 if (data[i]) {
77 delete data[i];
78 data[i] = nullptr;
79 }
80 }
81 }
82 }
83
84 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
85
86 void G4LivermoreGammaConversion5DModel::Initialise(const G4ParticleDefinition* particle,
87 const G4DataVector& cuts)
88 {
89 G4BetheHeitler5DModel::Initialise(particle, cuts);
90
91 if (verboseLevel > 1) {
92 G4cout << "Calling Initialise() of G4LivermoreGammaConversion5DModel." << G4endl
93 << "Energy range: " << LowEnergyLimit() / MeV << " MeV - " << HighEnergyLimit() / GeV
94 << " GeV isMater: " << IsMaster() << G4endl;
95 }
96
97 if (IsMaster()) {
98 // Initialise element selector
99 InitialiseElementSelectors(particle, cuts);
100
101 // Access to elements
102 const G4ElementTable* elemTable = G4Element::GetElementTable();
103 std::size_t numElems = (*elemTable).size();
104 for (std::size_t ie = 0; ie < numElems; ++ie) {
105 const G4Element* elem = (*elemTable)[ie];
106 const G4int Z = std::min(maxZ, elem->GetZasInt());
107 if (data[Z] == nullptr) {
108 ReadData(Z);
109 }
110 }
111 }
112
113 if (isInitialised) {
114 return;
115 }
116 fParticleChange = GetParticleChangeForGamma();
117 isInitialised = true;
118 }
119
120 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
121
122 const G4String& G4LivermoreGammaConversion5DModel::FindDirectoryPath()
123 {
124 // no check in this method - environment variable is check by utility
125 if (gDataDirectory.empty()) {
126 auto param = G4EmParameters::Instance();
127 std::ostringstream ost;
128 if (param->LivermoreDataDir() == "livermore") {
129 ost << param->GetDirLEDATA() << "/livermore/pair/";
130 useSpline = true;
131 }
132 else {
133 ost << param->GetDirLEDATA() << "/epics2017/pair/";
134 }
135 gDataDirectory = ost.str();
136 }
137 return gDataDirectory;
138 }
139
140 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
141
142 void G4LivermoreGammaConversion5DModel::ReadData(const G4int Z)
143 {
144 if (verboseLevel > 1) {
145 G4cout << "Calling ReadData() of G4LivermoreGammaConversion5DModel" << G4endl;
146 }
147
148 if (data[Z]) {
149 return;
150 }
151
152 std::ostringstream ost;
153 ost << FindDirectoryPath() << "pp-cs-" << Z << ".dat";
154
155 data[Z] = new G4PhysicsFreeVector(useSpline);
156
157 std::ifstream fin(ost.str().c_str());
158
159 if (!fin.is_open()) {
160 G4ExceptionDescription ed;
161 ed << "G4LivermoreGammaConversion5DModel data file <" << ost.str().c_str() << "> is not opened!"
162 << G4endl;
163 G4Exception("G4LivermoreGammaConversion5DModel::ReadData()", "em0003", FatalException, ed,
164 "G4LEDATA version should be G4EMLOW8.0 or later.");
165 return;
166 }
167 else {
168 if (verboseLevel > 1) {
169 G4cout << "File " << ost.str() << " is opened by G4LivermoreGammaConversion5DModel" << G4endl;
170 }
171 data[Z]->Retrieve(fin, true);
172 }
173 // Activation of spline interpolation
174 if (useSpline) data[Z]->FillSecondDerivatives();
175 }
176
177 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
178
179 G4double
180 G4LivermoreGammaConversion5DModel::ComputeCrossSectionPerAtom(const G4ParticleDefinition* particle,
181 G4double GammaEnergy, G4double Z,
182 G4double, G4double, G4double)
183 {
184 if (verboseLevel > 1) {
185 G4cout << "G4LivermoreGammaConversion5DModel::ComputeCrossSectionPerAtom() Z= " << Z << G4endl;
186 }
187 G4double xs = 0.0;
188 if (GammaEnergy < lowEnergyLimit) {
189 return xs;
190 }
191
192 G4int intZ = std::max(1, std::min(G4lrint(Z), maxZ));
193 G4PhysicsFreeVector* pv = data[intZ];
194 // if element was not initialised
195 // do initialisation safely for MT mode
196 if (!pv) {
197 InitialiseForElement(particle, intZ);
198 pv = data[intZ];
199 if (!pv) {
200 return xs;
201 }
202 }
203 // x-section is taken from the table
204 xs = pv->Value(GammaEnergy);
205 if (verboseLevel > 0) {
206 G4cout << "*** Gamma conversion xs for Z=" << Z << " at energy E(MeV)=" << GammaEnergy / MeV
207 << " cs=" << xs / millibarn << " mb" << G4endl;
208 }
209 return xs;
210 }
211
212 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
213
214 void G4LivermoreGammaConversion5DModel::InitialiseForElement(const G4ParticleDefinition*, G4int Z)
215 {
216 G4AutoLock l(&LivermoreGammaConversion5DModelMutex);
217 if (!data[Z]) {
218 ReadData(Z);
219 }
220 l.unlock();
221 }
222
223 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
224