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25 // 25 //
>> 26 // $Id: G4BetheBlochModel.cc,v 1.24 2008/10/22 16:00:57 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-09-02-patch-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" << 67 #include "G4NistManager.hh"
68 #include "G4Log.hh" <<
69 #include "G4DeltaAngle.hh" <<
70 #include <vector> <<
71 68
72 //....oooOO0OOooo........oooOO0OOooo........oo 69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
73 70
74 G4BetheBlochModel::G4BetheBlochModel(const G4P << 71 using namespace std;
>> 72
>> 73 G4BetheBlochModel::G4BetheBlochModel(const G4ParticleDefinition* p,
75 const G4S 74 const G4String& nam)
76 : G4VEmModel(nam), 75 : G4VEmModel(nam),
77 twoln10(2.0*G4Log(10.0)), << 76 particle(0),
78 fAlphaTlimit(1*CLHEP::GeV), << 77 tlimit(DBL_MAX),
79 fProtonTlimit(10*CLHEP::GeV) << 78 twoln10(2.0*log(10.0)),
>> 79 bg2lim(0.0169),
>> 80 taulim(8.4146e-3),
>> 81 isIon(false),
>> 82 isInitialised(false)
80 { 83 {
>> 84 fParticleChange = 0;
>> 85 if(p) SetParticle(p);
81 theElectron = G4Electron::Electron(); 86 theElectron = G4Electron::Electron();
82 corr = G4LossTableManager::Instance()->EmCor 87 corr = G4LossTableManager::Instance()->EmCorrections();
83 nist = G4NistManager::Instance(); 88 nist = G4NistManager::Instance();
84 SetLowEnergyLimit(2.0*CLHEP::MeV); << 89 SetLowEnergyLimit(2.0*MeV);
85 } 90 }
86 91
87 //....oooOO0OOooo........oooOO0OOooo........oo 92 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
88 93
89 G4BetheBlochModel::~G4BetheBlochModel() = defa << 94 G4BetheBlochModel::~G4BetheBlochModel()
>> 95 {}
>> 96
>> 97 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 98
>> 99 G4double G4BetheBlochModel::MinEnergyCut(const G4ParticleDefinition*,
>> 100 const G4MaterialCutsCouple* couple)
>> 101 {
>> 102 return couple->GetMaterial()->GetIonisation()->GetMeanExcitationEnergy();
>> 103 }
90 104
91 //....oooOO0OOooo........oooOO0OOooo........oo 105 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
92 106
93 void G4BetheBlochModel::Initialise(const G4Par 107 void G4BetheBlochModel::Initialise(const G4ParticleDefinition* p,
94 const G4Dat 108 const G4DataVector&)
95 { 109 {
96 if(p != particle) { SetupParameters(p); } << 110 if (!particle) SetParticle(p);
97 111
98 // always false before the run << 112 corrFactor = chargeSquare;
99 SetDeexcitationFlag(false); <<
100 113
101 // initialisation once << 114 if(!isInitialised) {
102 if(nullptr == fParticleChange) { << 115 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
116 fParticleChange = GetParticleChangeForLoss << 117 if(!fParticleChange) {
117 if(UseAngularGeneratorFlag() && nullptr == << 118 if (pParticleChange) {
118 SetAngularDistribution(new G4DeltaAngle( << 119 fParticleChange = reinterpret_cast<G4ParticleChangeForLoss*>
>> 120 (pParticleChange);
>> 121 } else {
>> 122 fParticleChange = new G4ParticleChangeForLoss();
>> 123 }
119 } 124 }
120 } 125 }
121 // initialisation for each new run <<
122 if(IsMaster() && nullptr != fICRU90) { <<
123 fICRU90->Initialise(); <<
124 } <<
125 } 126 }
126 127
127 //....oooOO0OOooo........oooOO0OOooo........oo << 128 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
128 129
129 G4double G4BetheBlochModel::GetChargeSquareRat << 130 void G4BetheBlochModel::SetParticle(const G4ParticleDefinition* p)
130 <<
131 <<
132 { 131 {
133 // this method is called only for ions, so n << 132 if(particle != p) {
134 if(isAlpha) { return 1.0; } << 133 particle = p;
135 chargeSquare = corr->EffectiveChargeSquareRa << 134 G4String pname = particle->GetParticleName();
136 return chargeSquare; << 135 if (particle->GetParticleType() == "nucleus" &&
>> 136 pname != "deuteron" && pname != "triton") {
>> 137 isIon = true;
>> 138 }
>> 139
>> 140 mass = particle->GetPDGMass();
>> 141 spin = particle->GetPDGSpin();
>> 142 G4double q = particle->GetPDGCharge()/eplus;
>> 143 chargeSquare = q*q;
>> 144 ratio = electron_mass_c2/mass;
>> 145 G4double magmom = particle->GetPDGMagneticMoment()
>> 146 *mass/(0.5*eplus*hbar_Planck*c_squared);
>> 147 magMoment2 = magmom*magmom - 1.0;
>> 148 formfact = 0.0;
>> 149 if(particle->GetLeptonNumber() == 0) {
>> 150 G4double x = 0.8426*GeV;
>> 151 if(spin == 0.0 && mass < GeV) {x = 0.736*GeV;}
>> 152 else if(mass > GeV) {
>> 153 x /= nist->GetZ13(mass/proton_mass_c2);
>> 154 // tlimit = 51.2*GeV*A13[iz]*A13[iz];
>> 155 }
>> 156 formfact = 2.0*electron_mass_c2/(x*x);
>> 157 tlimit = 2.0/formfact;
>> 158 }
>> 159 }
137 } 160 }
138 161
139 //....oooOO0OOooo........oooOO0OOooo........oo 162 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
140 163
141 G4double G4BetheBlochModel::GetParticleCharge( << 164 G4double G4BetheBlochModel::GetChargeSquareRatio(const G4ParticleDefinition* p,
142 << 165 const G4Material* mat,
143 << 166 G4double kineticEnergy)
144 { <<
145 // this method is called only for ions, so n <<
146 return corr->GetParticleCharge(p, mat, kinet <<
147 } <<
148 <<
149 //....oooOO0OOooo........oooOO0OOooo........oo <<
150 <<
151 void G4BetheBlochModel::SetupParameters(const <<
152 { 167 {
153 particle = p; << 168 // this method is called only for ions
154 mass = particle->GetPDGMass(); << 169 G4double q2 = corr->EffectiveChargeSquareRatio(p,mat,kineticEnergy);
155 spin = particle->GetPDGSpin(); << 170 corrFactor = q2*corr->EffectiveChargeCorrection(p,mat,kineticEnergy);
156 G4double q = particle->GetPDGCharge()*invepl << 171 return corrFactor;
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 } 172 }
175 173
176 //....oooOO0OOooo........oooOO0OOooo........oo 174 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
177 175
178 G4double G4BetheBlochModel::MinEnergyCut(const << 176 G4double G4BetheBlochModel::GetParticleCharge(const G4ParticleDefinition* p,
179 const << 177 const G4Material* mat,
>> 178 G4double kineticEnergy)
180 { 179 {
181 return couple->GetMaterial()->GetIonisation( << 180 // this method is called only for ions
>> 181 return corr->GetParticleCharge(p,mat,kineticEnergy);
182 } 182 }
183 183
184 //....oooOO0OOooo........oooOO0OOooo........oo 184 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
185 185
186 G4double 186 G4double
187 G4BetheBlochModel::ComputeCrossSectionPerElect 187 G4BetheBlochModel::ComputeCrossSectionPerElectron(const G4ParticleDefinition* p,
188 << 188 G4double kineticEnergy,
189 << 189 G4double cutEnergy,
190 << 190 G4double maxKinEnergy)
191 { 191 {
192 G4double cross = 0.0; 192 G4double cross = 0.0;
193 const G4double tmax = MaxSecondaryEnergy(p, << 193 G4double tmax = MaxSecondaryEnergy(p, kineticEnergy);
194 const G4double cutEnergy = std::min(std::min << 194 G4double maxEnergy = min(tmax,maxKinEnergy);
195 const G4double maxEnergy = std::min(tmax, ma <<
196 if(cutEnergy < maxEnergy) { 195 if(cutEnergy < maxEnergy) {
197 196
198 G4double totEnergy = kineticEnergy + mass; 197 G4double totEnergy = kineticEnergy + mass;
199 G4double energy2 = totEnergy*totEnergy; 198 G4double energy2 = totEnergy*totEnergy;
200 G4double beta2 = kineticEnergy*(kineti 199 G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*mass)/energy2;
201 200
202 cross = (maxEnergy - cutEnergy)/(cutEnergy << 201 cross = 1.0/cutEnergy - 1.0/maxEnergy
203 - beta2*G4Log(maxEnergy/cutEnergy)/tmax; << 202 - beta2*log(maxEnergy/cutEnergy)/tmax;
204 203
205 // +term for spin=1/2 particle 204 // +term for spin=1/2 particle
206 if( 0.0 < spin ) { cross += 0.5*(maxEnergy << 205 if( 0.5 == spin ) cross += 0.5*(maxEnergy - cutEnergy)/energy2;
>> 206
>> 207 // High order correction different for hadrons and ions
>> 208 // nevetheless they are applied to reduce high energy transfers
>> 209 // if(!isIon)
>> 210 //cross += corr->FiniteSizeCorrectionXS(p,currentMaterial,
>> 211 // kineticEnergy,cutEnergy);
207 212
208 cross *= CLHEP::twopi_mc2_rcl2*chargeSquar << 213 cross *= twopi_mc2_rcl2*chargeSquare/beta2;
209 } 214 }
210 215
211 // G4cout << "BB: e= " << kineticEnergy << 216 // G4cout << "BB: e= " << kineticEnergy << " tmin= " << cutEnergy
212 // << " tmax= " << tmax << " cross= 217 // << " tmax= " << tmax << " cross= " << cross << G4endl;
213 218
214 return cross; 219 return cross;
215 } 220 }
216 221
217 //....oooOO0OOooo........oooOO0OOooo........oo 222 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
218 223
219 G4double G4BetheBlochModel::ComputeCrossSectio 224 G4double G4BetheBlochModel::ComputeCrossSectionPerAtom(
220 con 225 const G4ParticleDefinition* p,
221 << 226 G4double kineticEnergy,
222 << 227 G4double Z, G4double,
223 228 G4double cutEnergy,
224 229 G4double maxEnergy)
225 { 230 {
226 return Z*ComputeCrossSectionPerElectron(p,ki << 231 G4double cross = Z*ComputeCrossSectionPerElectron
>> 232 (p,kineticEnergy,cutEnergy,maxEnergy);
>> 233 return cross;
227 } 234 }
228 235
229 //....oooOO0OOooo........oooOO0OOooo........oo 236 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
230 237
231 G4double G4BetheBlochModel::CrossSectionPerVol 238 G4double G4BetheBlochModel::CrossSectionPerVolume(
232 con << 239 const G4Material* material,
233 con 240 const G4ParticleDefinition* p,
234 << 241 G4double kineticEnergy,
235 242 G4double cutEnergy,
236 243 G4double maxEnergy)
237 { 244 {
238 G4double sigma = mat->GetElectronDensity() << 245 currentMaterial = material;
239 *ComputeCrossSectionPerElectron(p,kinEnerg << 246 G4double eDensity = material->GetElectronDensity();
240 if(isAlpha) { << 247 G4double cross = eDensity*ComputeCrossSectionPerElectron
241 sigma *= corr->EffectiveChargeSquareRatio( << 248 (p,kineticEnergy,cutEnergy,maxEnergy);
242 } << 249 return cross;
243 return sigma; <<
244 } 250 }
245 251
246 //....oooOO0OOooo........oooOO0OOooo........oo 252 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
247 253
248 G4double G4BetheBlochModel::ComputeDEDXPerVolu 254 G4double G4BetheBlochModel::ComputeDEDXPerVolume(const G4Material* material,
249 << 255 const G4ParticleDefinition* p,
250 << 256 G4double kineticEnergy,
251 << 257 G4double cut)
252 { 258 {
253 const G4double tmax = MaxSecondaryEnergy(p, << 259 G4double tmax = MaxSecondaryEnergy(p, kineticEnergy);
254 // projectile formfactor limit energy loss << 260 G4double cutEnergy = min(cut,tmax);
255 const G4double cutEnergy = std::min(std::min <<
256 261
257 G4double tau = kineticEnergy/mass; 262 G4double tau = kineticEnergy/mass;
258 G4double gam = tau + 1.0; 263 G4double gam = tau + 1.0;
259 G4double bg2 = tau * (tau+2.0); 264 G4double bg2 = tau * (tau+2.0);
260 G4double beta2 = bg2/(gam*gam); 265 G4double beta2 = bg2/(gam*gam);
261 G4double xc = cutEnergy/tmax; <<
262 266
263 G4double eexc = material->GetIonisation()-> 267 G4double eexc = material->GetIonisation()->GetMeanExcitationEnergy();
264 G4double eexc2 = eexc*eexc; 268 G4double eexc2 = eexc*eexc;
>> 269 G4double cden = material->GetIonisation()->GetCdensity();
>> 270 G4double mden = material->GetIonisation()->GetMdensity();
>> 271 G4double aden = material->GetIonisation()->GetAdensity();
>> 272 G4double x0den = material->GetIonisation()->GetX0density();
>> 273 G4double x1den = material->GetIonisation()->GetX1density();
265 274
266 G4double eDensity = material->GetElectronDen 275 G4double eDensity = material->GetElectronDensity();
267 276
268 // added ICRU90 stopping data for limited li << 277 G4double dedx = log(2.0*electron_mass_c2*bg2*cutEnergy/eexc2)
269 /* << 278 - (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; <<
309 279
310 if(0.0 < spin) { << 280 if(0.5 == spin) {
311 G4double del = 0.5*cutEnergy/(kineticEnerg 281 G4double del = 0.5*cutEnergy/(kineticEnergy + mass);
312 dedx += del*del; 282 dedx += del*del;
313 } 283 }
314 284
315 // density correction 285 // density correction
316 G4double x = G4Log(bg2)/twoln10; << 286 G4double x = log(bg2)/twoln10;
317 dedx -= material->GetIonisation()->DensityCo << 287 if ( x >= x0den ) {
>> 288 dedx -= twoln10*x - cden ;
>> 289 if ( x < x1den ) dedx -= aden*pow((x1den-x),mden) ;
>> 290 }
318 291
319 // shell correction 292 // shell correction
320 dedx -= 2.0*corr->ShellCorrection(p,material 293 dedx -= 2.0*corr->ShellCorrection(p,material,kineticEnergy);
321 294
322 // now compute the total ionization loss 295 // now compute the total ionization loss
323 dedx *= CLHEP::twopi_mc2_rcl2*chargeSquare*e << 296
>> 297 if (dedx < 0.0) dedx = 0.0 ;
>> 298
>> 299 dedx *= twopi_mc2_rcl2*chargeSquare*eDensity/beta2;
324 300
325 //High order correction different for hadron 301 //High order correction different for hadrons and ions
326 if(isIon) { 302 if(isIon) {
327 dedx += corr->IonBarkasCorrection(p,materi 303 dedx += corr->IonBarkasCorrection(p,material,kineticEnergy);
328 } else { 304 } else {
329 dedx += corr->HighOrderCorrections(p,mater 305 dedx += corr->HighOrderCorrections(p,material,kineticEnergy,cutEnergy);
330 } 306 }
331 <<
332 dedx = std::max(dedx, 0.0); <<
333 /* <<
334 G4cout << "E(MeV)= " << kineticEnergy/CLHEP: <<
335 << " " << material->GetName() << G <<
336 */ <<
337 return dedx; 307 return dedx;
338 } 308 }
339 309
340 //....oooOO0OOooo........oooOO0OOooo........oo 310 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
341 311
342 void G4BetheBlochModel::CorrectionsAlongStep(c 312 void G4BetheBlochModel::CorrectionsAlongStep(const G4MaterialCutsCouple* couple,
343 c << 313 const G4DynamicParticle* dp,
344 c << 314 G4double& eloss,
345 G << 315 G4double&,
346 { << 316 G4double length)
347 // no correction for alpha << 317 {
348 if(isAlpha) { return; } <<
349 <<
350 // no correction at the last step or at smal <<
351 const G4double preKinEnergy = dp->GetKinetic <<
352 if(eloss >= preKinEnergy || eloss < preKinEn <<
353 <<
354 // corrections for all charged particles wit <<
355 const G4ParticleDefinition* p = dp->GetDefin 318 const G4ParticleDefinition* p = dp->GetDefinition();
356 if(p != particle) { SetupParameters(p); } <<
357 if(!isIon) { return; } <<
358 <<
359 // effective energy and charge at a step <<
360 const G4double e = std::max(preKinEnergy - e <<
361 const G4Material* mat = couple->GetMaterial( 319 const G4Material* mat = couple->GetMaterial();
362 const G4double q20 = corr->EffectiveChargeSq << 320 G4double preKinEnergy = dp->GetKineticEnergy();
363 const G4double q2 = corr->EffectiveChargeSqu << 321 G4double e = preKinEnergy - eloss*0.5;
364 const G4double qfactor = q2/q20; << 322 if(e < 0.0) e = preKinEnergy*0.5;
365 << 323
366 /* << 324 if(isIon) {
367 G4cout << "G4BetheBlochModel::CorrectionsA << 325 G4double q2 = corr->EffectiveChargeSquareRatio(p,mat,e);
368 << preKinEnergy << " Eeff(MeV)=" << e << 326 GetModelOfFluctuations()->SetParticleAndCharge(p, q2);
369 << " eloss=" << eloss << " elossnew=" << e << 327 eloss *= q2*corr->EffectiveChargeCorrection(p,mat,e)/corrFactor;
370 << " qfactor=" << qfactor << " Qpre=" << q << 328 eloss += length*corr->IonHighOrderCorrections(p,couple,e);
371 << p->GetParticleName() <<G4endl; << 329 }
372 */ << 330
373 eloss *= qfactor; << 331 if(nuclearStopping && preKinEnergy*proton_mass_c2/mass < chargeSquare*100.*MeV) {
>> 332
>> 333 G4double nloss = length*corr->NuclearDEDX(p,mat,e,false);
>> 334
>> 335 // too big energy loss
>> 336 if(eloss + nloss > preKinEnergy) {
>> 337 nloss *= (preKinEnergy/(eloss + nloss));
>> 338 eloss = preKinEnergy;
>> 339 } else {
>> 340 eloss += nloss;
>> 341 }
>> 342 /*
>> 343 G4cout << "G4ionIonisation::CorrectionsAlongStep: e= " << preKinEnergy
>> 344 << " de= " << eloss << " NIEL= " << nloss
>> 345 << " dynQ= " << dp->GetCharge()/eplus << G4endl;
>> 346 */
>> 347 fParticleChange->ProposeNonIonizingEnergyDeposit(nloss);
>> 348 }
>> 349
374 } 350 }
375 351
376 //....oooOO0OOooo........oooOO0OOooo........oo 352 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
377 353
378 void G4BetheBlochModel::SampleSecondaries(std: << 354 void G4BetheBlochModel::SampleSecondaries(vector<G4DynamicParticle*>* vdp,
379 cons << 355 const G4MaterialCutsCouple*,
380 cons << 356 const G4DynamicParticle* dp,
381 G4do << 357 G4double minKinEnergy,
382 G4do << 358 G4double maxEnergy)
383 { << 359 {
384 G4double kinEnergy = dp->GetKineticEnergy(); << 360 G4double kineticEnergy = dp->GetKineticEnergy();
385 const G4double tmax = MaxSecondaryEnergy(dp- << 361 G4double tmax = MaxSecondaryEnergy(dp->GetDefinition(),kineticEnergy);
386 const G4double minKinEnergy = std::min(cut, << 362
387 const G4double maxKinEnergy = std::min(maxEn << 363 G4double maxKinEnergy = std::min(maxEnergy,tmax);
388 if(minKinEnergy >= maxKinEnergy) { return; } << 364 if(minKinEnergy >= maxKinEnergy) return;
389 << 365
390 //G4cout << "G4BetheBlochModel::SampleSecond << 366 G4double totEnergy = kineticEnergy + mass;
391 // << " Emax= " << maxKinEnergy << G << 367 G4double etot2 = totEnergy*totEnergy;
392 << 368 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 <<
396 369
397 G4double deltaKinEnergy, f; 370 G4double deltaKinEnergy, f;
398 G4double f1 = 0.0; 371 G4double f1 = 0.0;
399 G4double fmax = 1.0; 372 G4double fmax = 1.0;
400 if( 0.0 < spin ) { fmax += 0.5*maxKinEnergy* << 373 if( 0.5 == spin ) fmax += 0.5*maxKinEnergy*maxKinEnergy/etot2;
401 <<
402 CLHEP::HepRandomEngine* rndmEngineMod = G4Ra <<
403 G4double rndm[2]; <<
404 374
405 // sampling without nuclear size effect 375 // sampling without nuclear size effect
406 do { 376 do {
407 rndmEngineMod->flatArray(2, rndm); << 377 G4double q = G4UniformRand();
408 deltaKinEnergy = minKinEnergy*maxKinEnergy 378 deltaKinEnergy = minKinEnergy*maxKinEnergy
409 /(minKinEnergy*(1.0 - rndm << 379 /(minKinEnergy*(1.0 - q) + maxKinEnergy*q);
410 380
411 f = 1.0 - beta2*deltaKinEnergy/tmax; 381 f = 1.0 - beta2*deltaKinEnergy/tmax;
412 if( 0.0 < spin ) { << 382 if( 0.5 == spin ) {
413 f1 = 0.5*deltaKinEnergy*deltaKinEnergy/e 383 f1 = 0.5*deltaKinEnergy*deltaKinEnergy/etot2;
414 f += f1; 384 f += f1;
415 } 385 }
416 386
417 // Loop checking, 03-Aug-2015, Vladimir Iv << 387 } while( fmax*G4UniformRand() > f);
418 } while( fmax*rndm[1] > f); <<
419 388
420 // projectile formfactor - suppresion of hig 389 // projectile formfactor - suppresion of high energy
421 // delta-electron production at high energy 390 // delta-electron production at high energy
422 391
423 G4double x = formfact*deltaKinEnergy; 392 G4double x = formfact*deltaKinEnergy;
424 if(x > 1.e-6) { 393 if(x > 1.e-6) {
425 394
426 G4double x1 = 1.0 + x; 395 G4double x1 = 1.0 + x;
427 G4double grej = 1.0/(x1*x1); << 396 G4double g = 1.0/(x1*x1);
428 if( 0.0 < spin ) { << 397 if( 0.5 == spin ) {
429 G4double x2 = 0.5*electron_mass_c2*delta 398 G4double x2 = 0.5*electron_mass_c2*deltaKinEnergy/(mass*mass);
430 grej *= (1.0 + magMoment2*(x2 - f1/f)/(1 << 399 g *= (1.0 + magMoment2*(x2 - f1/f)/(1.0 + x2));
431 } 400 }
432 if(grej > 1.1) { << 401 if(g > 1.0) {
433 G4cout << "### G4BetheBlochModel WARNING << 402 G4cout << "### G4BetheBlochModel WARNING: g= " << g
434 << " " << dp->GetDefinition()->G << 403 << dp->GetDefinition()->GetParticleName()
435 << " Ekin(MeV)= " << kinEnergy << 404 << " Ekin(MeV)= " << kineticEnergy
436 << " delEkin(MeV)= " << deltaKinE << 405 << " delEkin(MeV)= " << deltaKinEnergy
437 << G4endl; << 406 << G4endl;
438 } 407 }
439 if(rndmEngineMod->flat() > grej) { return; << 408 if(G4UniformRand() > g) return;
440 } 409 }
441 410
442 G4ThreeVector deltaDirection; << 411 // delta-electron is produced
443 << 412 G4double totMomentum = totEnergy*sqrt(beta2);
444 if(UseAngularGeneratorFlag()) { << 413 G4double deltaMomentum =
445 const G4Material* mat = couple->GetMateria << 414 sqrt(deltaKinEnergy * (deltaKinEnergy + 2.0*electron_mass_c2));
446 deltaDirection = << 415 G4double cost = deltaKinEnergy * (totEnergy + electron_mass_c2) /
447 GetAngularDistribution()->SampleDirectio << 416 (deltaMomentum * totMomentum);
448 SelectRandomAtomNumber(mat), << 417 if(cost > 1.0) {
449 mat); << 418 G4cout << "### G4BetheBlochModel WARNING: cost= "
450 } else { << 419 << cost << " > 1 for "
451 << 420 << dp->GetDefinition()->GetParticleName()
452 G4double deltaMomentum = << 421 << " Ekin(MeV)= " << kineticEnergy
453 std::sqrt(deltaKinEnergy * (deltaKinEner << 422 << " p(MeV/c)= " << totMomentum
454 G4double cost = deltaKinEnergy * (totEnerg << 423 << " delEkin(MeV)= " << deltaKinEnergy
455 (deltaMomentum * dp->GetTotalMomentum()) << 424 << " delMom(MeV/c)= " << deltaMomentum
456 cost = std::min(cost, 1.0); << 425 << " tmin(MeV)= " << minKinEnergy
457 const G4double sint = std::sqrt((1.0 - cos << 426 << " tmax(MeV)= " << maxKinEnergy
458 const G4double phi = twopi*rndmEngineMod-> <<
459 <<
460 deltaDirection.set(sint*std::cos(phi),sint <<
461 deltaDirection.rotateUz(dp->GetMomentumDir <<
462 } <<
463 /* <<
464 G4cout << "### G4BetheBlochModel " <<
465 << dp->GetDefinition()->GetParticle <<
466 << " Ekin(MeV)= " << kinEnergy <<
467 << " delEkin(MeV)= " << deltaKinEne <<
468 << " tmin(MeV)= " << minKinEnergy <<
469 << " tmax(MeV)= " << maxKinEnergy <<
470 << " dir= " << dp->GetMomentumDirec 427 << " dir= " << dp->GetMomentumDirection()
471 << " dirDelta= " << deltaDirection << 428 << G4endl;
472 << G4endl; << 429 cost = 1.0;
473 */ << 430 }
>> 431 G4double sint = sqrt((1.0 - cost)*(1.0 + cost));
>> 432
>> 433 G4double phi = twopi * G4UniformRand() ;
>> 434
>> 435
>> 436 G4ThreeVector deltaDirection(sint*cos(phi),sint*sin(phi), cost);
>> 437 G4ThreeVector direction = dp->GetMomentumDirection();
>> 438 deltaDirection.rotateUz(direction);
>> 439
474 // create G4DynamicParticle object for delta 440 // create G4DynamicParticle object for delta ray
475 auto delta = new G4DynamicParticle(theElectr << 441 G4DynamicParticle* delta = new G4DynamicParticle(theElectron,
>> 442 deltaDirection,deltaKinEnergy);
476 443
477 vdp->push_back(delta); 444 vdp->push_back(delta);
478 445
479 // Change kinematics of primary particle 446 // Change kinematics of primary particle
480 kinEnergy -= deltaKinEnergy; << 447 kineticEnergy -= deltaKinEnergy;
481 G4ThreeVector finalP = dp->GetMomentum() - d << 448 G4ThreeVector finalP = direction*totMomentum - deltaDirection*deltaMomentum;
482 finalP = finalP.unit(); << 449 finalP = finalP.unit();
483 450
484 fParticleChange->SetProposedKineticEnergy(ki << 451 fParticleChange->SetProposedKineticEnergy(kineticEnergy);
485 fParticleChange->SetProposedMomentumDirectio 452 fParticleChange->SetProposedMomentumDirection(finalP);
486 } <<
487 <<
488 //....oooOO0OOooo........oooOO0OOooo........oo <<
489 <<
490 G4double G4BetheBlochModel::MaxSecondaryEnergy <<
491 <<
492 { <<
493 // here particle type is checked for the cas <<
494 // when this model is shared between particl <<
495 if(pd != particle) { SetupParameters(pd); } <<
496 G4double tau = kinEnergy/mass; <<
497 return 2.0*CLHEP::electron_mass_c2*tau*(tau <<
498 (1. + 2.0*(tau + 1.)*ratio + ratio*ratio); <<
499 } 453 }
500 454
501 //....oooOO0OOooo........oooOO0OOooo........oo 455 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
502 456