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27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class header file 29 // GEANT4 Class header file
30 // 30 //
31 // 31 //
32 // File name: G4MuBetheBlochModel 32 // File name: G4MuBetheBlochModel
33 // 33 //
34 // Author: Vladimir Ivanchenko on base 34 // Author: Vladimir Ivanchenko on base of Laszlo Urban code
35 // 35 //
36 // Creation date: 09.08.2002 36 // Creation date: 09.08.2002
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 39 //
40 // 04-12-02 Fix problem of G4DynamicParticle c 40 // 04-12-02 Fix problem of G4DynamicParticle constructor (V.Ivanchenko)
41 // 23-12-02 Change interface in order to move 41 // 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
42 // 27-01-03 Make models region aware (V.Ivanch 42 // 27-01-03 Make models region aware (V.Ivanchenko)
43 // 13-02-03 Add name (V.Ivanchenko) 43 // 13-02-03 Add name (V.Ivanchenko)
44 // 10-02-04 Calculation of radiative correctio 44 // 10-02-04 Calculation of radiative corrections using R.Kokoulin model (V.I)
45 // 08-04-05 Major optimisation of internal int 45 // 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
46 // 12-04-05 Add usage of G4EmCorrections (V.Iv 46 // 12-04-05 Add usage of G4EmCorrections (V.Ivanchenko)
47 // 13-02-06 ComputeCrossSectionPerElectron, Co 47 // 13-02-06 ComputeCrossSectionPerElectron, ComputeCrossSectionPerAtom (mma)
48 // 48 //
49 49
50 // 50 //
51 // ------------------------------------------- 51 // -------------------------------------------------------------------
52 // 52 //
53 53
54 //....oooOO0OOooo........oooOO0OOooo........oo 54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
55 //....oooOO0OOooo........oooOO0OOooo........oo 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56 56
57 #include "G4MuBetheBlochModel.hh" 57 #include "G4MuBetheBlochModel.hh"
58 #include "G4PhysicalConstants.hh" 58 #include "G4PhysicalConstants.hh"
59 #include "G4SystemOfUnits.hh" 59 #include "G4SystemOfUnits.hh"
60 #include "Randomize.hh" 60 #include "Randomize.hh"
61 #include "G4Electron.hh" 61 #include "G4Electron.hh"
62 #include "G4LossTableManager.hh" 62 #include "G4LossTableManager.hh"
63 #include "G4EmCorrections.hh" 63 #include "G4EmCorrections.hh"
64 #include "G4ParticleChangeForLoss.hh" 64 #include "G4ParticleChangeForLoss.hh"
65 #include "G4Log.hh" 65 #include "G4Log.hh"
66 #include "G4Exp.hh" 66 #include "G4Exp.hh"
67 #include "G4DeltaAngle.hh" <<
68 67
69 G4double G4MuBetheBlochModel::xgi[]={ 0.0199, 68 G4double G4MuBetheBlochModel::xgi[]={ 0.0199, 0.1017, 0.2372, 0.4083, 0.5917,
70 0.7628, 69 0.7628, 0.8983, 0.9801 };
71 70
72 G4double G4MuBetheBlochModel::wgi[]={ 0.0506, 71 G4double G4MuBetheBlochModel::wgi[]={ 0.0506, 0.1112, 0.1569, 0.1813, 0.1813,
73 0.1569, 72 0.1569, 0.1112, 0.0506 };
74 73
75 //....oooOO0OOooo........oooOO0OOooo........oo 74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
76 75
>> 76 using namespace std;
>> 77
77 G4MuBetheBlochModel::G4MuBetheBlochModel(const 78 G4MuBetheBlochModel::G4MuBetheBlochModel(const G4ParticleDefinition* p,
78 const 79 const G4String& nam)
79 : G4VEmModel(nam), 80 : G4VEmModel(nam),
80 limitRadCorrection(250.*CLHEP::MeV), << 81 particle(nullptr),
81 limitKinEnergy(100.*CLHEP::keV), << 82 limitKinEnergy(100.*keV),
82 logLimitKinEnergy(G4Log(limitKinEnergy)), << 83 logLimitKinEnergy(G4Log(limitKinEnergy)),
83 twoln10(2.0*G4Log(10.0)), << 84 twoln10(2.0*G4Log(10.0)),
84 alphaprime(CLHEP::fine_structure_const/CLH << 85 //bg2lim(0.0169),
>> 86 //taulim(8.4146e-3),
>> 87 alphaprime(fine_structure_const/twopi)
85 { 88 {
86 theElectron = G4Electron::Electron(); 89 theElectron = G4Electron::Electron();
87 corr = G4LossTableManager::Instance()->EmCor 90 corr = G4LossTableManager::Instance()->EmCorrections();
88 if(nullptr != p) { SetParticle(p); } << 91 fParticleChange = nullptr;
>> 92
>> 93 // initial initialisation of memeber should be overwritten
>> 94 // by SetParticle
>> 95 mass = massSquare = ratio = 1.0;
>> 96
>> 97 if(p) { SetParticle(p); }
89 } 98 }
90 99
91 //....oooOO0OOooo........oooOO0OOooo........oo 100 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
92 101
93 G4double G4MuBetheBlochModel::MinEnergyCut(con 102 G4double G4MuBetheBlochModel::MinEnergyCut(const G4ParticleDefinition*,
94 con 103 const G4MaterialCutsCouple* couple)
95 { 104 {
96 return couple->GetMaterial()->GetIonisation( 105 return couple->GetMaterial()->GetIonisation()->GetMeanExcitationEnergy();
97 } 106 }
98 107
99 //....oooOO0OOooo........oooOO0OOooo........oo 108 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
100 109
101 G4double G4MuBetheBlochModel::MaxSecondaryEner 110 G4double G4MuBetheBlochModel::MaxSecondaryEnergy(const G4ParticleDefinition*,
102 111 G4double kinEnergy)
103 { 112 {
104 G4double tau = kinEnergy/mass; 113 G4double tau = kinEnergy/mass;
105 G4double tmax = 2.0*CLHEP::electron_mass_c2* << 114 G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) /
106 (1. + 2.0*(tau + 1.)*ratio + 115 (1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
107 return tmax; 116 return tmax;
108 } 117 }
109 118
110 //....oooOO0OOooo........oooOO0OOooo........oo 119 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
111 120
112 void G4MuBetheBlochModel::SetParticle(const G4 <<
113 { <<
114 if(nullptr == particle) { <<
115 particle = p; <<
116 mass = particle->GetPDGMass(); <<
117 massSquare = mass*mass; <<
118 ratio = CLHEP::electron_mass_c2/mass; <<
119 } <<
120 } <<
121 <<
122 //....oooOO0OOooo........oooOO0OOooo........oo <<
123 <<
124 void G4MuBetheBlochModel::Initialise(const G4P 121 void G4MuBetheBlochModel::Initialise(const G4ParticleDefinition* p,
125 const G4D 122 const G4DataVector&)
126 { 123 {
127 SetParticle(p); << 124 if(p) { SetParticle(p); }
128 if(nullptr == fParticleChange) { << 125 if(!fParticleChange) { fParticleChange = GetParticleChangeForLoss(); }
129 fParticleChange = GetParticleChangeForLoss <<
130 if(UseAngularGeneratorFlag() && nullptr == <<
131 SetAngularDistribution(new G4DeltaAngle( <<
132 } <<
133 } <<
134 } 126 }
135 127
136 //....oooOO0OOooo........oooOO0OOooo........oo 128 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
137 129
138 G4double G4MuBetheBlochModel::ComputeCrossSect 130 G4double G4MuBetheBlochModel::ComputeCrossSectionPerElectron(
139 con 131 const G4ParticleDefinition* p,
140 132 G4double kineticEnergy,
141 133 G4double cutEnergy,
142 134 G4double maxKinEnergy)
143 { 135 {
144 G4double cross = 0.0; 136 G4double cross = 0.0;
145 G4double tmax = MaxSecondaryEnergy(p, kineti 137 G4double tmax = MaxSecondaryEnergy(p, kineticEnergy);
146 G4double maxEnergy = std::min(tmax, maxKinEn << 138 G4double maxEnergy = min(tmax,maxKinEnergy);
147 if(cutEnergy < maxEnergy) { 139 if(cutEnergy < maxEnergy) {
148 140
149 G4double totEnergy = kineticEnergy + mass; 141 G4double totEnergy = kineticEnergy + mass;
150 G4double energy2 = totEnergy*totEnergy; << 142 G4double energy2 = totEnergy*totEnergy;
151 G4double beta2 = kineticEnergy*(kineticEne << 143 G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*mass)/energy2;
152 144
153 cross = 1.0/cutEnergy - 1.0/maxEnergy - << 145 cross = 1.0/cutEnergy - 1.0/maxEnergy - beta2*G4Log(maxEnergy/cutEnergy)/tmax
154 beta2*G4Log(maxEnergy/cutEnergy)/tmax + << 146 + 0.5*(maxEnergy - cutEnergy)/energy2;
155 0.5*(maxEnergy - cutEnergy)/energy2; <<
156 147
157 // radiative corrections of R. Kokoulin 148 // radiative corrections of R. Kokoulin
158 if (maxEnergy > limitKinEnergy && kineticE << 149 if (maxEnergy > limitKinEnergy) {
159 150
160 G4double logtmax = G4Log(maxEnergy); 151 G4double logtmax = G4Log(maxEnergy);
161 G4double logtmin = G4Log(std::max(cutEne << 152 G4double logtmin = G4Log(max(cutEnergy,limitKinEnergy));
162 G4double logstep = logtmax - logtmin; 153 G4double logstep = logtmax - logtmin;
163 G4double dcross = 0.0; 154 G4double dcross = 0.0;
164 155
165 for (G4int ll=0; ll<8; ++ll) { << 156 for (G4int ll=0; ll<8; ll++)
>> 157 {
166 G4double ep = G4Exp(logtmin + xgi[ll]* 158 G4double ep = G4Exp(logtmin + xgi[ll]*logstep);
167 G4double a1 = G4Log(1.0 + 2.0*ep/CLHEP << 159 G4double a1 = G4Log(1.0 + 2.0*ep/electron_mass_c2);
168 G4double a3 = G4Log(4.0*totEnergy*(tot 160 G4double a3 = G4Log(4.0*totEnergy*(totEnergy - ep)/massSquare);
169 dcross += wgi[ll]*(1.0/ep - beta2/tmax 161 dcross += wgi[ll]*(1.0/ep - beta2/tmax + 0.5*ep/energy2)*a1*(a3 - a1);
170 } 162 }
>> 163
171 cross += dcross*logstep*alphaprime; 164 cross += dcross*logstep*alphaprime;
172 } 165 }
173 cross *= CLHEP::twopi_mc2_rcl2/beta2; << 166
>> 167 cross *= twopi_mc2_rcl2/beta2;
>> 168
174 } 169 }
>> 170
175 // G4cout << "tmin= " << cutEnergy << " tma 171 // G4cout << "tmin= " << cutEnergy << " tmax= " << tmax
176 // << " cross= " << cross << G4endl; << 172 // << " cross= " << cross << G4endl;
>> 173
177 return cross; 174 return cross;
178 } 175 }
179 176
180 //....oooOO0OOooo........oooOO0OOooo........oo 177 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
181 178
182 G4double G4MuBetheBlochModel::ComputeCrossSect 179 G4double G4MuBetheBlochModel::ComputeCrossSectionPerAtom(
183 con 180 const G4ParticleDefinition* p,
184 181 G4double kineticEnergy,
185 182 G4double Z, G4double,
186 183 G4double cutEnergy,
187 184 G4double maxEnergy)
188 { 185 {
189 G4double cross = Z*ComputeCrossSectionPerEle 186 G4double cross = Z*ComputeCrossSectionPerElectron
190 (p,ki 187 (p,kineticEnergy,cutEnergy,maxEnergy);
191 return cross; 188 return cross;
192 } 189 }
193 190
194 //....oooOO0OOooo........oooOO0OOooo........oo 191 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
195 192
196 G4double G4MuBetheBlochModel::CrossSectionPerV 193 G4double G4MuBetheBlochModel::CrossSectionPerVolume(
197 con 194 const G4Material* material,
198 con 195 const G4ParticleDefinition* p,
199 196 G4double kineticEnergy,
200 197 G4double cutEnergy,
201 198 G4double maxEnergy)
202 { 199 {
203 G4double eDensity = material->GetElectronDen 200 G4double eDensity = material->GetElectronDensity();
204 G4double cross = eDensity*ComputeCrossSectio 201 G4double cross = eDensity*ComputeCrossSectionPerElectron
205 (p,ki 202 (p,kineticEnergy,cutEnergy,maxEnergy);
206 return cross; 203 return cross;
207 } 204 }
208 205
209 //....oooOO0OOooo........oooOO0OOooo........oo 206 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
210 207
211 G4double G4MuBetheBlochModel::ComputeDEDXPerVo 208 G4double G4MuBetheBlochModel::ComputeDEDXPerVolume(const G4Material* material,
212 209 const G4ParticleDefinition* p,
213 210 G4double kineticEnergy,
214 211 G4double cut)
215 { 212 {
216 G4double tmax = MaxSecondaryEnergy(p, kinet 213 G4double tmax = MaxSecondaryEnergy(p, kineticEnergy);
217 G4double tau = kineticEnergy/mass; 214 G4double tau = kineticEnergy/mass;
218 G4double cutEnergy = std::min(cut, tmax); << 215 G4double cutEnergy = min(cut,tmax);
219 G4double gam = tau + 1.0; 216 G4double gam = tau + 1.0;
220 G4double bg2 = tau * (tau+2.0); 217 G4double bg2 = tau * (tau+2.0);
221 G4double beta2 = bg2/(gam*gam); 218 G4double beta2 = bg2/(gam*gam);
222 219
223 G4double eexc = material->GetIonisation()-> 220 G4double eexc = material->GetIonisation()->GetMeanExcitationEnergy();
224 G4double eexc2 = eexc*eexc; 221 G4double eexc2 = eexc*eexc;
225 222
226 G4double eDensity = material->GetElectronDen 223 G4double eDensity = material->GetElectronDensity();
227 224
228 G4double dedx = G4Log(2.0*CLHEP::electron_ma << 225 G4double dedx = G4Log(2.0*electron_mass_c2*bg2*cutEnergy/eexc2)
229 -(1.0 + cutEnergy/tmax)*beta2 226 -(1.0 + cutEnergy/tmax)*beta2;
230 227
231 G4double totEnergy = kineticEnergy + mass; 228 G4double totEnergy = kineticEnergy + mass;
232 G4double del = 0.5*cutEnergy/totEnergy; 229 G4double del = 0.5*cutEnergy/totEnergy;
233 dedx += del*del; 230 dedx += del*del;
234 231
235 // density correction 232 // density correction
236 G4double x = G4Log(bg2)/twoln10; 233 G4double x = G4Log(bg2)/twoln10;
237 dedx -= material->GetIonisation()->DensityCo 234 dedx -= material->GetIonisation()->DensityCorrection(x);
238 235
239 // shell and high order corrections << 236 // shell correction
240 dedx -= 2.0*corr->ShellCorrection(p,material 237 dedx -= 2.0*corr->ShellCorrection(p,material,kineticEnergy);
241 238
>> 239 // now compute the total ionization loss
>> 240
>> 241 if (dedx < 0.0) dedx = 0.0 ;
>> 242
242 // radiative corrections of R. Kokoulin 243 // radiative corrections of R. Kokoulin
243 if (cutEnergy > limitKinEnergy && kineticEne << 244 if (cutEnergy > limitKinEnergy) {
244 245
245 G4double logtmax = G4Log(cutEnergy); 246 G4double logtmax = G4Log(cutEnergy);
246 G4double logstep = logtmax - logLimitKinEn 247 G4double logstep = logtmax - logLimitKinEnergy;
247 G4double dloss = 0.0; 248 G4double dloss = 0.0;
248 G4double ftot2= 0.5/(totEnergy*totEnergy); 249 G4double ftot2= 0.5/(totEnergy*totEnergy);
249 250
250 for (G4int ll=0; ll<8; ++ll) { << 251 for (G4int ll=0; ll<8; ll++)
>> 252 {
251 G4double ep = G4Exp(logLimitKinEnergy + 253 G4double ep = G4Exp(logLimitKinEnergy + xgi[ll]*logstep);
252 G4double a1 = G4Log(1.0 + 2.0*ep/CLHEP:: << 254 G4double a1 = G4Log(1.0 + 2.0*ep/electron_mass_c2);
253 G4double a3 = G4Log(4.0*totEnergy*(totEn 255 G4double a3 = G4Log(4.0*totEnergy*(totEnergy - ep)/massSquare);
254 dloss += wgi[ll]*(1.0 - beta2*ep/tmax + 256 dloss += wgi[ll]*(1.0 - beta2*ep/tmax + ep*ep*ftot2)*a1*(a3 - a1);
255 } 257 }
256 dedx += dloss*logstep*alphaprime; 258 dedx += dloss*logstep*alphaprime;
257 } 259 }
258 dedx *= CLHEP::twopi_mc2_rcl2*eDensity/beta2 << 260
>> 261 dedx *= twopi_mc2_rcl2*eDensity/beta2;
259 262
260 //High order corrections 263 //High order corrections
261 dedx += corr->HighOrderCorrections(p,materia 264 dedx += corr->HighOrderCorrections(p,material,kineticEnergy,cutEnergy);
262 dedx = std::max(dedx, 0.); << 265
263 return dedx; 266 return dedx;
264 } 267 }
265 268
266 //....oooOO0OOooo........oooOO0OOooo........oo 269 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
267 270
268 void G4MuBetheBlochModel::SampleSecondaries( << 271 void G4MuBetheBlochModel::SampleSecondaries(vector<G4DynamicParticle*>* vdp,
269 std::vector<G4Dynami << 272 const G4MaterialCutsCouple*,
270 const G4MaterialCutsCouple* couple, << 273 const G4DynamicParticle* dp,
271 const G4DynamicParticle* dp, << 274 G4double minKinEnergy,
272 G4double minKinEnergy, << 275 G4double maxEnergy)
273 G4double maxEnergy) <<
274 { 276 {
275 G4double kineticEnergy = dp->GetKineticEnerg << 277 G4double tmax = MaxSecondaryKinEnergy(dp);
276 G4double tmax = MaxSecondaryEnergy(dp->GetDe << 278 G4double maxKinEnergy = min(maxEnergy,tmax);
277 G4double maxKinEnergy = std::min(maxEnergy, <<
278 if(minKinEnergy >= maxKinEnergy) { return; } 279 if(minKinEnergy >= maxKinEnergy) { return; }
279 280
280 G4double totEnergy = kineticEnergy + mass; << 281 G4double kineticEnergy = dp->GetKineticEnergy();
281 G4double etot2 = totEnergy*totEnergy; << 282 G4double totEnergy = kineticEnergy + mass;
282 G4double beta2 = kineticEnergy*(kineticEnerg << 283 G4double etot2 = totEnergy*totEnergy;
>> 284 G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*mass)/etot2;
283 285
284 G4double grej = 1.; 286 G4double grej = 1.;
285 G4bool radC = (tmax > limitKinEnergy && kine << 287 if(tmax > limitKinEnergy) {
286 if(radC) { << 288 G4double a0 = G4Log(2.*totEnergy/mass);
287 G4double a0 = G4Log(2.*totEnergy/mass); << 289 grej += alphaprime*a0*a0;
288 grej += alphaprime*a0*a0; <<
289 } 290 }
290 291
291 G4double tkin, f; << 292 G4double deltaKinEnergy, f;
292 293
293 // sampling follows ... 294 // sampling follows ...
294 do { 295 do {
295 G4double q = G4UniformRand(); 296 G4double q = G4UniformRand();
296 tkin = minKinEnergy*maxKinEnergy/(minKinEn << 297 deltaKinEnergy = minKinEnergy*maxKinEnergy
297 f = 1.0 - beta2*tkin/tmax + 0.5*tkin*tkin/ << 298 /(minKinEnergy*(1.0 - q) + maxKinEnergy*q);
>> 299
>> 300
>> 301 f = 1.0 - beta2*deltaKinEnergy/tmax
>> 302 + 0.5*deltaKinEnergy*deltaKinEnergy/etot2;
298 303
299 if(radC && tkin > limitKinEnergy) { << 304 if(deltaKinEnergy > limitKinEnergy) {
300 G4double a1 = G4Log(1.0 + 2.0*tkin/CLHEP << 305 G4double a1 = G4Log(1.0 + 2.0*deltaKinEnergy/electron_mass_c2);
301 G4double a3 = G4Log(4.0*totEnergy*(totEn << 306 G4double a3 = G4Log(4.0*totEnergy*(totEnergy - deltaKinEnergy)/massSquare);
302 f *= (1. + alphaprime*a1*(a3 - a1)); 307 f *= (1. + alphaprime*a1*(a3 - a1));
303 } 308 }
304 309
305 if(f > grej) { 310 if(f > grej) {
306 G4cout << "G4MuBetheBlochModel::Sample 311 G4cout << "G4MuBetheBlochModel::SampleSecondary Warning! "
307 << "Majorant " << grej << " < " 312 << "Majorant " << grej << " < "
308 << f << " for edelta= " << tkin << 313 << f << " for edelta= " << deltaKinEnergy
309 << " tmin= " << minKinEnergy << 314 << " tmin= " << minKinEnergy << " max= " << maxKinEnergy
310 << G4endl; 315 << G4endl;
311 } 316 }
312 // Loop checking, 03-Aug-2015, Vladimir Iv 317 // Loop checking, 03-Aug-2015, Vladimir Ivanchenko
313 } while( grej*G4UniformRand() > f ); 318 } while( grej*G4UniformRand() > f );
314 319
315 G4ThreeVector deltaDirection; << 320 G4double deltaMomentum =
>> 321 sqrt(deltaKinEnergy * (deltaKinEnergy + 2.0*electron_mass_c2));
>> 322 G4double totalMomentum = totEnergy*sqrt(beta2);
>> 323 G4double cost = deltaKinEnergy * (totEnergy + electron_mass_c2) /
>> 324 (deltaMomentum * totalMomentum);
>> 325
>> 326 G4double sint = sqrt(1.0 - cost*cost);
>> 327
>> 328 G4double phi = twopi * G4UniformRand() ;
>> 329
>> 330 G4ThreeVector deltaDirection(sint*cos(phi),sint*sin(phi), cost) ;
>> 331 G4ThreeVector direction = dp->GetMomentumDirection();
>> 332 deltaDirection.rotateUz(direction);
316 333
317 if(UseAngularGeneratorFlag()) { << 334 // primary change
318 const G4Material* mat = couple->GetMateria << 335 kineticEnergy -= deltaKinEnergy;
319 deltaDirection = GetAngularDistribution()- << 336 G4ThreeVector dir = totalMomentum*direction - deltaMomentum*deltaDirection;
320 SelectRandomAtomNumber(ma << 337 direction = dir.unit();
321 } else { << 338 fParticleChange->SetProposedKineticEnergy(kineticEnergy);
322 << 339 fParticleChange->SetProposedMomentumDirection(direction);
323 G4double deltaMom = std::sqrt(tkin * (tkin <<
324 G4double totalMom = totEnergy*std::sqrt(be <<
325 G4double cost = tkin * (totEnergy + CLHEP: <<
326 (deltaMom * totalMom); <<
327 cost = std::min(cost, 1.0); <<
328 const G4double sint = std::sqrt((1.0 - cos <<
329 const G4double phi = twopi*G4UniformRand() <<
330 340
331 deltaDirection.set(sint*std::cos(phi),sint <<
332 deltaDirection.rotateUz(dp->GetMomentumDir <<
333 } <<
334 // create G4DynamicParticle object for delta 341 // create G4DynamicParticle object for delta ray
335 auto delta = new G4DynamicParticle(theElectr << 342 G4DynamicParticle* delta = new G4DynamicParticle(theElectron,
>> 343 deltaDirection,deltaKinEnergy);
336 vdp->push_back(delta); 344 vdp->push_back(delta);
337 <<
338 // primary change <<
339 kineticEnergy -= tkin; <<
340 G4ThreeVector dir = dp->GetMomentum() - delt <<
341 dir = dir.unit(); <<
342 fParticleChange->SetProposedKineticEnergy(ki <<
343 fParticleChange->SetProposedMomentumDirectio <<
344 } 345 }
345 346
346 //....oooOO0OOooo........oooOO0OOooo........oo 347 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
347 348