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25 // 25 //
>> 26 // $Id: G4BetheBlochModel.cc,v 1.36 2009/12/03 17:26:40 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-09-03 $
>> 28 //
26 // ------------------------------------------- 29 // -------------------------------------------------------------------
27 // 30 //
28 // GEANT4 Class header file 31 // GEANT4 Class header file
29 // 32 //
30 // 33 //
31 // File name: G4BetheBlochModel 34 // File name: G4BetheBlochModel
32 // 35 //
33 // Author: Vladimir Ivanchenko on base 36 // Author: Vladimir Ivanchenko on base of Laszlo Urban code
34 // 37 //
35 // Creation date: 03.01.2002 38 // Creation date: 03.01.2002
36 // 39 //
37 // Modifications: 40 // Modifications:
38 // 41 //
39 // 04-12-02 Fix problem of G4DynamicParticle c 42 // 04-12-02 Fix problem of G4DynamicParticle constructor (V.Ivanchenko)
40 // 23-12-02 Change interface in order to move 43 // 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
41 // 27-01-03 Make models region aware (V.Ivanch 44 // 27-01-03 Make models region aware (V.Ivanchenko)
42 // 13-02-03 Add name (V.Ivanchenko) 45 // 13-02-03 Add name (V.Ivanchenko)
43 // 24-03-05 Add G4EmCorrections (V.Ivanchenko) 46 // 24-03-05 Add G4EmCorrections (V.Ivanchenko)
44 // 11-04-05 Major optimisation of internal int 47 // 11-04-05 Major optimisation of internal interfaces (V.Ivanchenko)
45 // 11-02-06 ComputeCrossSectionPerElectron, Co 48 // 11-02-06 ComputeCrossSectionPerElectron, ComputeCrossSectionPerAtom (mma)
46 // 12-02-06 move G4LossTableManager::Instance( 49 // 12-02-06 move G4LossTableManager::Instance()->EmCorrections()
47 // in constructor (mma) 50 // in constructor (mma)
48 // 12-08-08 Added methods GetParticleCharge, G 51 // 12-08-08 Added methods GetParticleCharge, GetChargeSquareRatio,
49 // CorrectionsAlongStep needed for io 52 // CorrectionsAlongStep needed for ions(V.Ivanchenko)
50 // 53 //
51 // ------------------------------------------- 54 // -------------------------------------------------------------------
52 // 55 //
53 56
>> 57
54 //....oooOO0OOooo........oooOO0OOooo........oo 58 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
55 //....oooOO0OOooo........oooOO0OOooo........oo 59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56 60
57 #include "G4BetheBlochModel.hh" 61 #include "G4BetheBlochModel.hh"
58 #include "Randomize.hh" 62 #include "Randomize.hh"
59 #include "G4PhysicalConstants.hh" <<
60 #include "G4SystemOfUnits.hh" <<
61 #include "G4NistManager.hh" <<
62 #include "G4Electron.hh" 63 #include "G4Electron.hh"
63 #include "G4LossTableManager.hh" 64 #include "G4LossTableManager.hh"
64 #include "G4EmCorrections.hh" 65 #include "G4EmCorrections.hh"
65 #include "G4EmParameters.hh" <<
66 #include "G4ParticleChangeForLoss.hh" 66 #include "G4ParticleChangeForLoss.hh"
67 #include "G4ICRU90StoppingData.hh" <<
68 #include "G4Log.hh" <<
69 #include "G4DeltaAngle.hh" <<
70 #include <vector> <<
71 67
72 //....oooOO0OOooo........oooOO0OOooo........oo 68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
73 69
74 G4BetheBlochModel::G4BetheBlochModel(const G4P << 70 using namespace std;
>> 71
>> 72 G4BetheBlochModel::G4BetheBlochModel(const G4ParticleDefinition* p,
75 const G4S 73 const G4String& nam)
76 : G4VEmModel(nam), 74 : G4VEmModel(nam),
77 twoln10(2.0*G4Log(10.0)), << 75 particle(0),
78 fAlphaTlimit(1*CLHEP::GeV), << 76 tlimit(DBL_MAX),
79 fProtonTlimit(10*CLHEP::GeV) << 77 twoln10(2.0*log(10.0)),
80 { << 78 bg2lim(0.0169),
>> 79 taulim(8.4146e-3),
>> 80 isIon(false),
>> 81 isInitialised(false)
>> 82 {
>> 83 fParticleChange = 0;
>> 84 if(p) {
>> 85 SetGenericIon(p);
>> 86 SetParticle(p);
>> 87 }
81 theElectron = G4Electron::Electron(); 88 theElectron = G4Electron::Electron();
82 corr = G4LossTableManager::Instance()->EmCor 89 corr = G4LossTableManager::Instance()->EmCorrections();
83 nist = G4NistManager::Instance(); 90 nist = G4NistManager::Instance();
84 SetLowEnergyLimit(2.0*CLHEP::MeV); << 91 SetLowEnergyLimit(2.0*MeV);
85 } 92 }
86 93
87 //....oooOO0OOooo........oooOO0OOooo........oo 94 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
88 95
89 G4BetheBlochModel::~G4BetheBlochModel() = defa << 96 G4BetheBlochModel::~G4BetheBlochModel()
>> 97 {}
>> 98
>> 99 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 100
>> 101 G4double G4BetheBlochModel::MinEnergyCut(const G4ParticleDefinition*,
>> 102 const G4MaterialCutsCouple* couple)
>> 103 {
>> 104 return couple->GetMaterial()->GetIonisation()->GetMeanExcitationEnergy();
>> 105 }
90 106
91 //....oooOO0OOooo........oooOO0OOooo........oo 107 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
92 108
93 void G4BetheBlochModel::Initialise(const G4Par 109 void G4BetheBlochModel::Initialise(const G4ParticleDefinition* p,
94 const G4Dat 110 const G4DataVector&)
95 { 111 {
96 if(p != particle) { SetupParameters(p); } << 112 SetGenericIon(p);
>> 113 SetParticle(p);
97 114
>> 115 //G4cout << "G4BetheBlochModel::Initialise for " << p->GetParticleName()
>> 116 // << " isIon= " << isIon
>> 117 // << G4endl;
>> 118
>> 119 corrFactor = chargeSquare;
98 // always false before the run 120 // always false before the run
99 SetDeexcitationFlag(false); 121 SetDeexcitationFlag(false);
100 122
101 // initialisation once << 123 if(!isInitialised) {
102 if(nullptr == fParticleChange) { << 124 isInitialised = true;
103 const G4String& pname = particle->GetParti <<
104 if(G4EmParameters::Instance()->UseICRU90Da <<
105 (pname == "proton" || pname == "Generic <<
106 fICRU90 = nist->GetICRU90StoppingData(); <<
107 } <<
108 if (pname == "GenericIon") { <<
109 isIon = true; <<
110 } else if (pname == "alpha") { <<
111 isAlpha = true; <<
112 } else if (particle->GetPDGCharge() > 1.1* <<
113 isIon = true; <<
114 } <<
115 <<
116 fParticleChange = GetParticleChangeForLoss 125 fParticleChange = GetParticleChangeForLoss();
117 if(UseAngularGeneratorFlag() && nullptr == <<
118 SetAngularDistribution(new G4DeltaAngle( <<
119 } <<
120 } <<
121 // initialisation for each new run <<
122 if(IsMaster() && nullptr != fICRU90) { <<
123 fICRU90->Initialise(); <<
124 } 126 }
125 } 127 }
126 128
127 //....oooOO0OOooo........oooOO0OOooo........oo 129 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
128 130
129 G4double G4BetheBlochModel::GetChargeSquareRat 131 G4double G4BetheBlochModel::GetChargeSquareRatio(const G4ParticleDefinition* p,
130 << 132 const G4Material* mat,
131 << 133 G4double kineticEnergy)
132 { 134 {
133 // this method is called only for ions, so n << 135 // this method is called only for ions
134 if(isAlpha) { return 1.0; } << 136 G4double q2 = corr->EffectiveChargeSquareRatio(p,mat,kineticEnergy);
135 chargeSquare = corr->EffectiveChargeSquareRa << 137 corrFactor = q2*corr->EffectiveChargeCorrection(p,mat,kineticEnergy);
136 return chargeSquare; << 138 return corrFactor;
137 } 139 }
138 140
139 //....oooOO0OOooo........oooOO0OOooo........oo 141 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
140 142
141 G4double G4BetheBlochModel::GetParticleCharge( 143 G4double G4BetheBlochModel::GetParticleCharge(const G4ParticleDefinition* p,
142 << 144 const G4Material* mat,
143 << 145 G4double kineticEnergy)
144 { 146 {
145 // this method is called only for ions, so n << 147 // this method is called only for ions
146 return corr->GetParticleCharge(p, mat, kinet << 148 return corr->GetParticleCharge(p,mat,kineticEnergy);
147 } <<
148 <<
149 //....oooOO0OOooo........oooOO0OOooo........oo <<
150 <<
151 void G4BetheBlochModel::SetupParameters(const <<
152 { <<
153 particle = p; <<
154 mass = particle->GetPDGMass(); <<
155 spin = particle->GetPDGSpin(); <<
156 G4double q = particle->GetPDGCharge()*invepl <<
157 chargeSquare = q*q; <<
158 ratio = electron_mass_c2/mass; <<
159 constexpr G4double aMag = 1./(0.5*eplus*CLHE <<
160 G4double magmom = particle->GetPDGMagneticMo <<
161 magMoment2 = magmom*magmom - 1.0; <<
162 formfact = 0.0; <<
163 tlimit = DBL_MAX; <<
164 if(particle->GetLeptonNumber() == 0) { <<
165 G4double x = 0.8426*CLHEP::GeV; <<
166 if(spin == 0.0 && mass < CLHEP::GeV) { x = <<
167 else if (mass > CLHEP::GeV) { <<
168 G4int iz = G4lrint(std::abs(q)); <<
169 if(iz > 1) { x /= nist->GetA27(iz); } <<
170 } <<
171 formfact = 2.0*CLHEP::electron_mass_c2/(x* <<
172 tlimit = 2.0/formfact; <<
173 } <<
174 } <<
175 <<
176 //....oooOO0OOooo........oooOO0OOooo........oo <<
177 <<
178 G4double G4BetheBlochModel::MinEnergyCut(const <<
179 const <<
180 { <<
181 return couple->GetMaterial()->GetIonisation( <<
182 } 149 }
183 150
184 //....oooOO0OOooo........oooOO0OOooo........oo 151 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
185 152
186 G4double 153 G4double
187 G4BetheBlochModel::ComputeCrossSectionPerElect 154 G4BetheBlochModel::ComputeCrossSectionPerElectron(const G4ParticleDefinition* p,
188 << 155 G4double kineticEnergy,
189 << 156 G4double cutEnergy,
190 << 157 G4double maxKinEnergy)
191 { 158 {
192 G4double cross = 0.0; 159 G4double cross = 0.0;
193 const G4double tmax = MaxSecondaryEnergy(p, << 160 G4double tmax = MaxSecondaryEnergy(p, kineticEnergy);
194 const G4double cutEnergy = std::min(std::min << 161 G4double maxEnergy = min(tmax,maxKinEnergy);
195 const G4double maxEnergy = std::min(tmax, ma <<
196 if(cutEnergy < maxEnergy) { 162 if(cutEnergy < maxEnergy) {
197 163
198 G4double totEnergy = kineticEnergy + mass; 164 G4double totEnergy = kineticEnergy + mass;
199 G4double energy2 = totEnergy*totEnergy; 165 G4double energy2 = totEnergy*totEnergy;
200 G4double beta2 = kineticEnergy*(kineti 166 G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*mass)/energy2;
201 167
202 cross = (maxEnergy - cutEnergy)/(cutEnergy << 168 cross = 1.0/cutEnergy - 1.0/maxEnergy
203 - beta2*G4Log(maxEnergy/cutEnergy)/tmax; << 169 - beta2*log(maxEnergy/cutEnergy)/tmax;
204 170
205 // +term for spin=1/2 particle 171 // +term for spin=1/2 particle
206 if( 0.0 < spin ) { cross += 0.5*(maxEnergy << 172 if( 0.5 == spin ) cross += 0.5*(maxEnergy - cutEnergy)/energy2;
207 173
208 cross *= CLHEP::twopi_mc2_rcl2*chargeSquar << 174 // High order correction different for hadrons and ions
>> 175 // nevetheless they are applied to reduce high energy transfers
>> 176 // if(!isIon)
>> 177 //cross += corr->FiniteSizeCorrectionXS(p,currentMaterial,
>> 178 // kineticEnergy,cutEnergy);
>> 179
>> 180 cross *= twopi_mc2_rcl2*chargeSquare/beta2;
209 } 181 }
210 182
211 // G4cout << "BB: e= " << kineticEnergy << 183 // G4cout << "BB: e= " << kineticEnergy << " tmin= " << cutEnergy
212 // << " tmax= " << tmax << " cross= 184 // << " tmax= " << tmax << " cross= " << cross << G4endl;
213 185
214 return cross; 186 return cross;
215 } 187 }
216 188
217 //....oooOO0OOooo........oooOO0OOooo........oo 189 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
218 190
219 G4double G4BetheBlochModel::ComputeCrossSectio 191 G4double G4BetheBlochModel::ComputeCrossSectionPerAtom(
220 con 192 const G4ParticleDefinition* p,
221 << 193 G4double kineticEnergy,
222 << 194 G4double Z, G4double,
223 195 G4double cutEnergy,
224 196 G4double maxEnergy)
225 { 197 {
226 return Z*ComputeCrossSectionPerElectron(p,ki << 198 G4double cross = Z*ComputeCrossSectionPerElectron
>> 199 (p,kineticEnergy,cutEnergy,maxEnergy);
>> 200 return cross;
227 } 201 }
228 202
229 //....oooOO0OOooo........oooOO0OOooo........oo 203 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
230 204
231 G4double G4BetheBlochModel::CrossSectionPerVol 205 G4double G4BetheBlochModel::CrossSectionPerVolume(
232 con << 206 const G4Material* material,
233 con 207 const G4ParticleDefinition* p,
234 << 208 G4double kineticEnergy,
235 209 G4double cutEnergy,
236 210 G4double maxEnergy)
237 { 211 {
238 G4double sigma = mat->GetElectronDensity() << 212 currentMaterial = material;
239 *ComputeCrossSectionPerElectron(p,kinEnerg << 213 G4double eDensity = material->GetElectronDensity();
240 if(isAlpha) { << 214 G4double cross = eDensity*ComputeCrossSectionPerElectron
241 sigma *= corr->EffectiveChargeSquareRatio( << 215 (p,kineticEnergy,cutEnergy,maxEnergy);
242 } << 216 return cross;
243 return sigma; <<
244 } 217 }
245 218
246 //....oooOO0OOooo........oooOO0OOooo........oo 219 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
247 220
248 G4double G4BetheBlochModel::ComputeDEDXPerVolu 221 G4double G4BetheBlochModel::ComputeDEDXPerVolume(const G4Material* material,
249 << 222 const G4ParticleDefinition* p,
250 << 223 G4double kineticEnergy,
251 << 224 G4double cut)
252 { 225 {
253 const G4double tmax = MaxSecondaryEnergy(p, << 226 G4double tmax = MaxSecondaryEnergy(p, kineticEnergy);
254 // projectile formfactor limit energy loss << 227 G4double cutEnergy = min(cut,tmax);
255 const G4double cutEnergy = std::min(std::min <<
256 228
257 G4double tau = kineticEnergy/mass; 229 G4double tau = kineticEnergy/mass;
258 G4double gam = tau + 1.0; 230 G4double gam = tau + 1.0;
259 G4double bg2 = tau * (tau+2.0); 231 G4double bg2 = tau * (tau+2.0);
260 G4double beta2 = bg2/(gam*gam); 232 G4double beta2 = bg2/(gam*gam);
261 G4double xc = cutEnergy/tmax; <<
262 233
263 G4double eexc = material->GetIonisation()-> 234 G4double eexc = material->GetIonisation()->GetMeanExcitationEnergy();
264 G4double eexc2 = eexc*eexc; 235 G4double eexc2 = eexc*eexc;
>> 236 //G4double cden = material->GetIonisation()->GetCdensity();
>> 237 //G4double mden = material->GetIonisation()->GetMdensity();
>> 238 //G4double aden = material->GetIonisation()->GetAdensity();
>> 239 //G4double x0den = material->GetIonisation()->GetX0density();
>> 240 //G4double x1den = material->GetIonisation()->GetX1density();
265 241
266 G4double eDensity = material->GetElectronDen 242 G4double eDensity = material->GetElectronDensity();
267 243
268 // added ICRU90 stopping data for limited li << 244 G4double dedx = log(2.0*electron_mass_c2*bg2*cutEnergy/eexc2)
269 /* << 245 - (1.0 + cutEnergy/tmax)*beta2;
270 G4cout << "### DEDX ICRI90:" << (nullptr != <<
271 << " Ekin=" << kineticEnergy <<
272 << " " << p->GetParticleName() <<
273 << " q2=" << chargeSquare <<
274 << " inside " << material->GetName() << G4 <<
275 */ <<
276 if(nullptr != fICRU90 && kineticEnergy < fPr <<
277 if(material != currentMaterial) { <<
278 currentMaterial = material; <<
279 baseMaterial = material->GetBaseMaterial <<
280 ? material->GetBaseMaterial() : materi <<
281 iICRU90 = fICRU90->GetIndex(baseMaterial <<
282 } <<
283 if(iICRU90 >= 0) { <<
284 G4double dedx = 0.0; <<
285 // only for alpha <<
286 if(isAlpha) { <<
287 if(kineticEnergy <= fAlphaTlimit) { <<
288 dedx = fICRU90->GetElectronicDEDXforAlpha( <<
289 } else { <<
290 const G4double e = kineticEnergy*CLH <<
291 dedx = fICRU90->GetElectronicDEDXforProton <<
292 } <<
293 } else { <<
294 dedx = fICRU90->GetElectronicDEDXforPr <<
295 *chargeSquare; <<
296 } <<
297 dedx *= material->GetDensity(); <<
298 if(cutEnergy < tmax) { <<
299 dedx += (G4Log(xc) + (1.0 - xc)*beta2) <<
300 *(eDensity*chargeSquare/beta2); <<
301 } <<
302 //G4cout << " iICRU90=" << iICRU90 << <<
303 if(dedx > 0.0) { return dedx; } <<
304 } <<
305 } <<
306 // general Bethe-Bloch formula <<
307 G4double dedx = G4Log(2.0*CLHEP::electron_ma <<
308 - (1.0 + xc)*beta2; <<
309 246
310 if(0.0 < spin) { << 247 if(0.5 == spin) {
311 G4double del = 0.5*cutEnergy/(kineticEnerg 248 G4double del = 0.5*cutEnergy/(kineticEnergy + mass);
312 dedx += del*del; 249 dedx += del*del;
313 } 250 }
314 251
315 // density correction 252 // density correction
316 G4double x = G4Log(bg2)/twoln10; << 253 G4double x = log(bg2)/twoln10;
>> 254 //if ( x >= x0den ) {
>> 255 // dedx -= twoln10*x - cden ;
>> 256 // if ( x < x1den ) dedx -= aden*pow((x1den-x),mden) ;
>> 257 //}
317 dedx -= material->GetIonisation()->DensityCo 258 dedx -= material->GetIonisation()->DensityCorrection(x);
318 259
319 // shell correction 260 // shell correction
320 dedx -= 2.0*corr->ShellCorrection(p,material 261 dedx -= 2.0*corr->ShellCorrection(p,material,kineticEnergy);
321 262
322 // now compute the total ionization loss 263 // now compute the total ionization loss
323 dedx *= CLHEP::twopi_mc2_rcl2*chargeSquare*e << 264
>> 265 if (dedx < 0.0) dedx = 0.0 ;
>> 266
>> 267 dedx *= twopi_mc2_rcl2*chargeSquare*eDensity/beta2;
324 268
325 //High order correction different for hadron 269 //High order correction different for hadrons and ions
326 if(isIon) { 270 if(isIon) {
327 dedx += corr->IonBarkasCorrection(p,materi 271 dedx += corr->IonBarkasCorrection(p,material,kineticEnergy);
328 } else { 272 } else {
329 dedx += corr->HighOrderCorrections(p,mater 273 dedx += corr->HighOrderCorrections(p,material,kineticEnergy,cutEnergy);
330 } 274 }
331 <<
332 dedx = std::max(dedx, 0.0); <<
333 /* <<
334 G4cout << "E(MeV)= " << kineticEnergy/CLHEP: <<
335 << " " << material->GetName() << G <<
336 */ <<
337 return dedx; 275 return dedx;
338 } 276 }
339 277
340 //....oooOO0OOooo........oooOO0OOooo........oo 278 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 279 /*
>> 280 void G4BetheBlochModel::CorrectionsAlongStep(const G4MaterialCutsCouple*,
>> 281 const G4DynamicParticle*,
>> 282 G4double&,
>> 283 G4double&,
>> 284 G4double)
>> 285 {}
>> 286 */
341 287
342 void G4BetheBlochModel::CorrectionsAlongStep(c 288 void G4BetheBlochModel::CorrectionsAlongStep(const G4MaterialCutsCouple* couple,
343 c << 289 const G4DynamicParticle* dp,
344 c << 290 G4double& eloss,
345 G << 291 G4double&,
346 { << 292 G4double length)
347 // no correction for alpha << 293 {
348 if(isAlpha) { return; } << 294 if(isIon) {
349 << 295 const G4ParticleDefinition* p = dp->GetDefinition();
350 // no correction at the last step or at smal << 296 const G4Material* mat = couple->GetMaterial();
351 const G4double preKinEnergy = dp->GetKinetic << 297 G4double preKinEnergy = dp->GetKineticEnergy();
352 if(eloss >= preKinEnergy || eloss < preKinEn << 298 G4double e = preKinEnergy - eloss*0.5;
353 << 299 if(e < 0.0) e = preKinEnergy*0.5;
354 // corrections for all charged particles wit << 300
355 const G4ParticleDefinition* p = dp->GetDefin << 301 G4double q2 = corr->EffectiveChargeSquareRatio(p,mat,e);
356 if(p != particle) { SetupParameters(p); } << 302 GetModelOfFluctuations()->SetParticleAndCharge(p, q2);
357 if(!isIon) { return; } << 303 G4double qfactor = q2*corr->EffectiveChargeCorrection(p,mat,e)/corrFactor;
358 << 304 G4double highOrder = length*corr->IonHighOrderCorrections(p,couple,e);
359 // effective energy and charge at a step << 305 eloss *= qfactor;
360 const G4double e = std::max(preKinEnergy - e << 306 eloss += highOrder;
361 const G4Material* mat = couple->GetMaterial( << 307 //G4cout << "G4BetheBlochModel::CorrectionsAlongStep: e= " << preKinEnergy
362 const G4double q20 = corr->EffectiveChargeSq << 308 // << " qfactor= " << qfactor
363 const G4double q2 = corr->EffectiveChargeSqu << 309 // << " highOrder= " << highOrder << " (" << highOrder/eloss << ")" << G4endl;
364 const G4double qfactor = q2/q20; << 310 }
365 <<
366 /* <<
367 G4cout << "G4BetheBlochModel::CorrectionsA <<
368 << preKinEnergy << " Eeff(MeV)=" << e <<
369 << " eloss=" << eloss << " elossnew=" << e <<
370 << " qfactor=" << qfactor << " Qpre=" << q <<
371 << p->GetParticleName() <<G4endl; <<
372 */ <<
373 eloss *= qfactor; <<
374 } 311 }
375 312
376 //....oooOO0OOooo........oooOO0OOooo........oo 313 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
377 314
378 void G4BetheBlochModel::SampleSecondaries(std: << 315 void G4BetheBlochModel::SampleSecondaries(vector<G4DynamicParticle*>* vdp,
379 cons << 316 const G4MaterialCutsCouple*,
380 cons << 317 const G4DynamicParticle* dp,
381 G4do << 318 G4double minKinEnergy,
382 G4do << 319 G4double maxEnergy)
383 { << 320 {
384 G4double kinEnergy = dp->GetKineticEnergy(); << 321 G4double kineticEnergy = dp->GetKineticEnergy();
385 const G4double tmax = MaxSecondaryEnergy(dp- << 322 G4double tmax = MaxSecondaryEnergy(dp->GetDefinition(),kineticEnergy);
386 const G4double minKinEnergy = std::min(cut, << 323
387 const G4double maxKinEnergy = std::min(maxEn << 324 G4double maxKinEnergy = std::min(maxEnergy,tmax);
388 if(minKinEnergy >= maxKinEnergy) { return; } << 325 if(minKinEnergy >= maxKinEnergy) return;
389 << 326
390 //G4cout << "G4BetheBlochModel::SampleSecond << 327 G4double totEnergy = kineticEnergy + mass;
391 // << " Emax= " << maxKinEnergy << G << 328 G4double etot2 = totEnergy*totEnergy;
392 << 329 G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*mass)/etot2;
393 const G4double totEnergy = kinEnergy + mass; <<
394 const G4double etot2 = totEnergy*totEnergy; <<
395 const G4double beta2 = kinEnergy*(kinEnergy <<
396 330
397 G4double deltaKinEnergy, f; 331 G4double deltaKinEnergy, f;
398 G4double f1 = 0.0; 332 G4double f1 = 0.0;
399 G4double fmax = 1.0; 333 G4double fmax = 1.0;
400 if( 0.0 < spin ) { fmax += 0.5*maxKinEnergy* << 334 if( 0.5 == spin ) fmax += 0.5*maxKinEnergy*maxKinEnergy/etot2;
401 <<
402 CLHEP::HepRandomEngine* rndmEngineMod = G4Ra <<
403 G4double rndm[2]; <<
404 335
405 // sampling without nuclear size effect 336 // sampling without nuclear size effect
406 do { 337 do {
407 rndmEngineMod->flatArray(2, rndm); << 338 G4double q = G4UniformRand();
408 deltaKinEnergy = minKinEnergy*maxKinEnergy 339 deltaKinEnergy = minKinEnergy*maxKinEnergy
409 /(minKinEnergy*(1.0 - rndm << 340 /(minKinEnergy*(1.0 - q) + maxKinEnergy*q);
410 341
411 f = 1.0 - beta2*deltaKinEnergy/tmax; 342 f = 1.0 - beta2*deltaKinEnergy/tmax;
412 if( 0.0 < spin ) { << 343 if( 0.5 == spin ) {
413 f1 = 0.5*deltaKinEnergy*deltaKinEnergy/e 344 f1 = 0.5*deltaKinEnergy*deltaKinEnergy/etot2;
414 f += f1; 345 f += f1;
415 } 346 }
416 347
417 // Loop checking, 03-Aug-2015, Vladimir Iv << 348 } while( fmax*G4UniformRand() > f);
418 } while( fmax*rndm[1] > f); <<
419 349
420 // projectile formfactor - suppresion of hig 350 // projectile formfactor - suppresion of high energy
421 // delta-electron production at high energy 351 // delta-electron production at high energy
422 352
423 G4double x = formfact*deltaKinEnergy; 353 G4double x = formfact*deltaKinEnergy;
424 if(x > 1.e-6) { 354 if(x > 1.e-6) {
425 355
426 G4double x1 = 1.0 + x; 356 G4double x1 = 1.0 + x;
427 G4double grej = 1.0/(x1*x1); << 357 G4double g = 1.0/(x1*x1);
428 if( 0.0 < spin ) { << 358 if( 0.5 == spin ) {
429 G4double x2 = 0.5*electron_mass_c2*delta 359 G4double x2 = 0.5*electron_mass_c2*deltaKinEnergy/(mass*mass);
430 grej *= (1.0 + magMoment2*(x2 - f1/f)/(1 << 360 g *= (1.0 + magMoment2*(x2 - f1/f)/(1.0 + x2));
431 } 361 }
432 if(grej > 1.1) { << 362 if(g > 1.0) {
433 G4cout << "### G4BetheBlochModel WARNING << 363 G4cout << "### G4BetheBlochModel WARNING: g= " << g
434 << " " << dp->GetDefinition()->G << 364 << dp->GetDefinition()->GetParticleName()
435 << " Ekin(MeV)= " << kinEnergy << 365 << " Ekin(MeV)= " << kineticEnergy
436 << " delEkin(MeV)= " << deltaKinE << 366 << " delEkin(MeV)= " << deltaKinEnergy
437 << G4endl; << 367 << G4endl;
438 } 368 }
439 if(rndmEngineMod->flat() > grej) { return; << 369 if(G4UniformRand() > g) return;
440 } 370 }
441 371
442 G4ThreeVector deltaDirection; << 372 // delta-electron is produced
443 << 373 G4double totMomentum = totEnergy*sqrt(beta2);
444 if(UseAngularGeneratorFlag()) { << 374 G4double deltaMomentum =
445 const G4Material* mat = couple->GetMateria << 375 sqrt(deltaKinEnergy * (deltaKinEnergy + 2.0*electron_mass_c2));
446 deltaDirection = << 376 G4double cost = deltaKinEnergy * (totEnergy + electron_mass_c2) /
447 GetAngularDistribution()->SampleDirectio << 377 (deltaMomentum * totMomentum);
448 SelectRandomAtomNumber(mat), <<
449 mat); <<
450 } else { <<
451 <<
452 G4double deltaMomentum = <<
453 std::sqrt(deltaKinEnergy * (deltaKinEner <<
454 G4double cost = deltaKinEnergy * (totEnerg <<
455 (deltaMomentum * dp->GetTotalMomentum()) <<
456 cost = std::min(cost, 1.0); <<
457 const G4double sint = std::sqrt((1.0 - cos <<
458 const G4double phi = twopi*rndmEngineMod-> <<
459 <<
460 deltaDirection.set(sint*std::cos(phi),sint <<
461 deltaDirection.rotateUz(dp->GetMomentumDir <<
462 } <<
463 /* 378 /*
464 G4cout << "### G4BetheBlochModel " << 379 if(cost > 1.0) {
465 << dp->GetDefinition()->GetParticle << 380 G4cout << "### G4BetheBlochModel WARNING: cost= "
466 << " Ekin(MeV)= " << kinEnergy << 381 << cost << " > 1 for "
467 << " delEkin(MeV)= " << deltaKinEne << 382 << dp->GetDefinition()->GetParticleName()
468 << " tmin(MeV)= " << minKinEnergy << 383 << " Ekin(MeV)= " << kineticEnergy
469 << " tmax(MeV)= " << maxKinEnergy << 384 << " p(MeV/c)= " << totMomentum
>> 385 << " delEkin(MeV)= " << deltaKinEnergy
>> 386 << " delMom(MeV/c)= " << deltaMomentum
>> 387 << " tmin(MeV)= " << minKinEnergy
>> 388 << " tmax(MeV)= " << maxKinEnergy
470 << " dir= " << dp->GetMomentumDirec 389 << " dir= " << dp->GetMomentumDirection()
471 << " dirDelta= " << deltaDirection << 390 << G4endl;
472 << G4endl; << 391 cost = 1.0;
>> 392 }
473 */ 393 */
>> 394 G4double sint = sqrt((1.0 - cost)*(1.0 + cost));
>> 395
>> 396 G4double phi = twopi * G4UniformRand() ;
>> 397
>> 398
>> 399 G4ThreeVector deltaDirection(sint*cos(phi),sint*sin(phi), cost);
>> 400 G4ThreeVector direction = dp->GetMomentumDirection();
>> 401 deltaDirection.rotateUz(direction);
>> 402
474 // create G4DynamicParticle object for delta 403 // create G4DynamicParticle object for delta ray
475 auto delta = new G4DynamicParticle(theElectr << 404 G4DynamicParticle* delta = new G4DynamicParticle(theElectron,
>> 405 deltaDirection,deltaKinEnergy);
476 406
477 vdp->push_back(delta); 407 vdp->push_back(delta);
478 408
479 // Change kinematics of primary particle 409 // Change kinematics of primary particle
480 kinEnergy -= deltaKinEnergy; << 410 kineticEnergy -= deltaKinEnergy;
481 G4ThreeVector finalP = dp->GetMomentum() - d << 411 G4ThreeVector finalP = direction*totMomentum - deltaDirection*deltaMomentum;
482 finalP = finalP.unit(); << 412 finalP = finalP.unit();
483 413
484 fParticleChange->SetProposedKineticEnergy(ki << 414 fParticleChange->SetProposedKineticEnergy(kineticEnergy);
485 fParticleChange->SetProposedMomentumDirectio 415 fParticleChange->SetProposedMomentumDirection(finalP);
486 } 416 }
487 417
488 //....oooOO0OOooo........oooOO0OOooo........oo 418 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
489 419
490 G4double G4BetheBlochModel::MaxSecondaryEnergy 420 G4double G4BetheBlochModel::MaxSecondaryEnergy(const G4ParticleDefinition* pd,
491 << 421 G4double kinEnergy)
492 { 422 {
493 // here particle type is checked for the cas << 423 // here particle type is checked for any method
494 // when this model is shared between particl << 424 SetParticle(pd);
495 if(pd != particle) { SetupParameters(pd); } <<
496 G4double tau = kinEnergy/mass; 425 G4double tau = kinEnergy/mass;
497 return 2.0*CLHEP::electron_mass_c2*tau*(tau << 426 G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) /
498 (1. + 2.0*(tau + 1.)*ratio + ratio*ratio); << 427 (1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
>> 428 return std::min(tmax,tlimit);
499 } 429 }
500 430
501 //....oooOO0OOooo........oooOO0OOooo........oo 431 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
502 432