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28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4LivermoreBremsstrahlungMod
33 //
34 // Author: Vladimir Ivanchenko use inhe
35 // base class implementing ultr
36 // model
37 //
38 // Creation date: 04.10.2011
39 //
40 // Modifications:
41 //
42 // -------------------------------------------
43 //
44 //....oooOO0OOooo........oooOO0OOooo........oo
45 //....oooOO0OOooo........oooOO0OOooo........oo
46
47 #include "G4LivermoreBremsstrahlungModel.hh"
48 #include "G4PhysicalConstants.hh"
49 #include "G4SystemOfUnits.hh"
50 #include "G4Electron.hh"
51 #include "G4Positron.hh"
52 #include "G4Gamma.hh"
53 #include "Randomize.hh"
54 #include "G4AutoLock.hh"
55 #include "G4Material.hh"
56 #include "G4Element.hh"
57 #include "G4ElementVector.hh"
58 #include "G4ProductionCutsTable.hh"
59 #include "G4ParticleChangeForLoss.hh"
60 #include "G4Generator2BS.hh"
61
62 #include "G4Physics2DVector.hh"
63 #include "G4Exp.hh"
64 #include "G4Log.hh"
65
66 #include "G4ios.hh"
67 #include <fstream>
68 #include <iomanip>
69
70 //....oooOO0OOooo........oooOO0OOooo........oo
71
72 namespace { G4Mutex LivermoreBremsstrahlungMod
73 using namespace std;
74
75
76 G4Physics2DVector* G4LivermoreBremsstrahlungMo
77 G4double G4LivermoreBremsstrahlungModel::ylimi
78 G4double G4LivermoreBremsstrahlungModel::expnu
79
80 static const G4double emaxlog = 4*G4Log(10.);
81 static const G4double alpha = CLHEP::twopi*CLH
82 static const G4double epeaklimit= 300*CLHEP::M
83 static const G4double elowlimit = 20*CLHEP::ke
84
85 G4LivermoreBremsstrahlungModel::G4LivermoreBre
86 const G4ParticleDefinition* p, const G4Strin
87 : G4eBremsstrahlungRelModel(p,nam),useBicubi
88 {
89 SetLowEnergyLimit(10.0*eV);
90 SetAngularDistribution(new G4Generator2BS())
91 }
92
93 //....oooOO0OOooo........oooOO0OOooo........oo
94
95 G4LivermoreBremsstrahlungModel::~G4LivermoreBr
96 {
97 if(IsMaster()) {
98 for(size_t i=0; i<101; ++i) {
99 if(dataSB[i]) {
100 delete dataSB[i];
101 dataSB[i] = nullptr;
102 }
103 }
104 }
105 }
106
107 //....oooOO0OOooo........oooOO0OOooo........oo
108
109 void G4LivermoreBremsstrahlungModel::Initialis
110 const G4DataVector& cuts)
111 {
112 // Access to elements
113 if(IsMaster()) {
114 // check environment variable
115 // Build the complete string identifying t
116 const char* path = G4FindDataDir("G4LEDATA
117
118 const G4ElementTable* theElmTable = G4Elem
119 size_t numOfElm = G4Element::GetNumberOfEl
120 if(numOfElm > 0) {
121 for(size_t i=0; i<numOfElm; ++i) {
122 G4int Z = (*theElmTable)[i]->GetZasInt();
123 if(Z < 1) { Z = 1; }
124 else if(Z > 100) { Z = 100; }
125 //G4cout << "Z= " << Z << G4endl;
126 // Initialisation
127 if(!dataSB[Z]) { ReadData(Z, path); }
128 }
129 }
130 }
131 G4eBremsstrahlungRelModel::Initialise(p, cut
132 }
133
134 //....oooOO0OOooo........oooOO0OOooo........oo
135
136 G4String G4LivermoreBremsstrahlungModel::Direc
137 {
138 return "/livermore/brem/br";
139 }
140
141 //....oooOO0OOooo........oooOO0OOooo........oo
142
143 void G4LivermoreBremsstrahlungModel::ReadData(
144 {
145 if(dataSB[Z]) { return; }
146 const char* datadir = path;
147
148 if(nullptr == datadir) {
149 datadir = G4FindDataDir("G4LEDATA");
150 if(!datadir) {
151 G4Exception("G4LivermoreBremsstrahlungMo
152 FatalException,"Environment variable G4L
153 return;
154 }
155 }
156 std::ostringstream ost;
157 ost << datadir << DirectoryPath() << Z;
158 std::ifstream fin(ost.str().c_str());
159 if( !fin.is_open()) {
160 G4ExceptionDescription ed;
161 ed << "Bremsstrahlung data file <" << ost.
162 << "> is not opened!";
163 G4Exception("G4LivermoreBremsstrahlungMode
164 FatalException,ed,
165 "G4LEDATA version should be G4EMLOW8.0 or
166 return;
167 }
168 //G4cout << "G4LivermoreBremsstrahlungModel
169 // << ">" << G4endl;
170 G4Physics2DVector* v = new G4Physics2DVector
171 if(v->Retrieve(fin)) {
172 if(useBicubicInterpolation) { v->SetBicubi
173 dataSB[Z] = v;
174 ylimit[Z] = v->Value(0.97, emaxlog, idx, i
175 } else {
176 G4ExceptionDescription ed;
177 ed << "Bremsstrahlung data file <" << ost.
178 << "> is not retrieved!";
179 G4Exception("G4LivermoreBremsstrahlungMode
180 FatalException,ed,
181 "G4LEDATA version should be G4EMLOW8.0 or
182 delete v;
183 }
184 }
185
186 //....oooOO0OOooo........oooOO0OOooo........oo
187
188 G4double
189 G4LivermoreBremsstrahlungModel::ComputeDXSecti
190 {
191 if(gammaEnergy < 0.0 || fPrimaryKinEnergy <=
192 G4double x = gammaEnergy/fPrimaryKinEnergy;
193 G4double y = G4Log(fPrimaryKinEnergy/MeV);
194 G4int Z = fCurrentIZ;
195
196 //G4cout << "G4LivermoreBremsstrahlungModel:
197 // << " x= " << x << " y= " << y << " " <<
198 if(!dataSB[Z]) { InitialiseForElement(0, Z);
199
200 G4double invb2 = fPrimaryTotalEnergy*fPrimar
201 *(fPrimaryKinEnergy + 2.*fP
202 G4double cross = dataSB[Z]->Value(x,y,idx,id
203
204 if(!fIsElectron) {
205 G4double invbeta1 = sqrt(invb2);
206 G4double e2 = fPrimaryKinEnergy - gammaEne
207 if(e2 > 0.0) {
208 G4double invbeta2 = (e2 + fPrimaryPartic
209 /sqrt(e2*(e2 + 2.*fP
210 G4double xxx = alpha*fCurrentIZ*(invbeta
211 if(xxx < expnumlim) { cross = 0.0; }
212 else { cross *= G4Exp(xxx); }
213 } else {
214 cross = 0.0;
215 }
216 }
217
218 return cross;
219 }
220
221 //....oooOO0OOooo........oooOO0OOooo........oo
222
223 void
224 G4LivermoreBremsstrahlungModel::SampleSecondar
225 std::v
226 const G4MaterialCutsCouple* couple,
227 const G4DynamicParticle* dp,
228 G4double cutEnergy,
229 G4double maxEnergy)
230 {
231 G4double kineticEnergy = dp->GetKineticEnerg
232 G4double cut = std::min(cutEnergy, kineticE
233 G4double emax = std::min(maxEnergy, kineticE
234 if(cut >= emax) { return; }
235 // sets total energy, kinetic energy and den
236 SetupForMaterial(fPrimaryParticle, couple->G
237
238 const G4Element* elm =
239 SelectRandomAtom(couple,fPrimaryParticle,k
240 fCurrentIZ = elm->GetZasInt();
241 G4int Z = fCurrentIZ;
242
243 G4double totMomentum = sqrt(kineticEnergy*(f
244 /*
245 G4cout << "G4LivermoreBremsstrahlungModel::S
246 << kineticEnergy/MeV
247 << " Z= " << Z << " cut(MeV)= " << cut/MeV
248 << " emax(MeV)= " << emax/MeV << " corr= "
249 */
250 G4double xmin = G4Log(cut*cut + fDensityCorr
251 G4double xmax = G4Log(emax*emax + fDensityC
252 G4double y = G4Log(kineticEnergy/MeV);
253
254 G4double gammaEnergy, v;
255
256 // majoranta
257 G4double x0 = cut/kineticEnergy;
258 G4double vmax = dataSB[Z]->Value(x0, y, idx,
259
260 // majoranta corrected for e-
261 if(fIsElectron && x0 < 0.97 &&
262 ((kineticEnergy > epeaklimit) || (kinetic
263 G4double ylim = std::min(ylimit[Z],1.1*dat
264 if(ylim > vmax) { vmax = ylim; }
265 }
266 if(x0 < 0.05) { vmax *= 1.2; }
267
268 do {
269 //++ncount;
270 G4double x = G4Exp(xmin + G4UniformRand()*
271 if(x < 0.0) { x = 0.0; }
272 gammaEnergy = sqrt(x);
273 G4double x1 = gammaEnergy/kineticEnergy;
274 v = dataSB[Z]->Value(x1, y, idx, idy);
275
276 // correction for positrons
277 if(!fIsElectron) {
278 G4double e1 = kineticEnergy - cut;
279 G4double invbeta1 = (e1 + fPrimaryPartic
280 /sqrt(e1*(e1 + 2*fPr
281 G4double e2 = kineticEnergy - gammaEnerg
282 G4double invbeta2 = (e2 + fPrimaryPartic
283 /sqrt(e2*(e2 + 2*fPr
284 G4double xxx = twopi*fine_structure_cons
285
286 if(xxx < expnumlim) { v = 0.0; }
287 else { v *= G4Exp(xxx); }
288 }
289
290 if (v > 1.05*vmax && nwarn < 5) {
291 ++nwarn;
292 G4ExceptionDescription ed;
293 ed << "### G4LivermoreBremsstrahlungMode
294 << v << " > " << vmax << " by " << v/vmax
295 << " Egamma(MeV)= " << gammaEnergy
296 << " Ee(MeV)= " << kineticEnergy
297 << " Z= " << Z << " " << fPrimaryParticle-
298
299 if ( 20 == nwarn ) {
300 ed << "\n ### G4LivermoreBremsstrahlungModel
301 }
302 G4Exception("G4LivermoreBremsstrahlungMo
303 JustWarning, ed,"");
304
305 }
306 } while (v < vmax*G4UniformRand());
307
308 //
309 // angles of the emitted gamma. ( Z - axis a
310 // use general interface
311 //
312
313 G4ThreeVector gammaDirection =
314 GetAngularDistribution()->SampleDirection(
315 Z, couple->GetMaterial());
316
317 // create G4DynamicParticle object for the G
318 G4DynamicParticle* gamma =
319 new G4DynamicParticle(fGammaParticle,gamma
320 vdp->push_back(gamma);
321
322 G4ThreeVector direction = (totMomentum*dp->G
323 - gammaEnergy*gammaDirection).unit(
324
325 /*
326 G4cout << "### G4SBModel: v= "
327 << " Eg(MeV)= " << gammaEnergy
328 << " Ee(MeV)= " << kineticEnergy
329 << " DirE " << direction << " DirG " << gam
330 << G4endl;
331 */
332 // energy of primary
333 G4double finalE = kineticEnergy - gammaEnerg
334
335 // stop tracking and create new secondary in
336 if(gammaEnergy > SecondaryThreshold()) {
337 fParticleChange->ProposeTrackStatus(fStopA
338 fParticleChange->SetProposedKineticEnergy(
339 G4DynamicParticle* el =
340 new G4DynamicParticle(const_cast<G4Parti
341 direction, finalE);
342 vdp->push_back(el);
343
344 // continue tracking
345 } else {
346 fParticleChange->SetProposedMomentumDirect
347 fParticleChange->SetProposedKineticEnergy(
348 }
349 }
350
351 //....oooOO0OOooo........oooOO0OOooo........oo
352
353 void G4LivermoreBremsstrahlungModel::Initialis
354 const G4P
355 G4int Z)
356 {
357 G4AutoLock l(&LivermoreBremsstrahlungModelMu
358 if(!dataSB[Z]) { ReadData(Z); }
359 l.unlock();
360 }
361
362 //....oooOO0OOooo........oooOO0OOooo........oo
363