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25 // 22 //
>> 23 // $Id: G4MollerBhabhaModel.cc,v 1.22 2005/08/18 15:05:13 vnivanch Exp $
>> 24 // GEANT4 tag $Name: geant4-08-00 $
26 // 25 //
27 // ------------------------------------------- 26 // -------------------------------------------------------------------
28 // 27 //
29 // GEANT4 Class file 28 // GEANT4 Class file
30 // 29 //
31 // 30 //
32 // File name: G4MollerBhabhaModel 31 // File name: G4MollerBhabhaModel
33 // 32 //
34 // Author: Vladimir Ivanchenko on base 33 // Author: Vladimir Ivanchenko on base of Laszlo Urban code
35 // 34 //
36 // Creation date: 03.01.2002 35 // Creation date: 03.01.2002
37 // 36 //
38 // Modifications: 37 // Modifications:
39 // 38 //
40 // 13-11-02 Minor fix - use normalised directi 39 // 13-11-02 Minor fix - use normalised direction (V.Ivanchenko)
41 // 04-12-02 Change G4DynamicParticle construct 40 // 04-12-02 Change G4DynamicParticle constructor in PostStepDoIt (V.Ivanchenko)
42 // 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)
43 // 27-01-03 Make models region aware (V.Ivanch 42 // 27-01-03 Make models region aware (V.Ivanchenko)
44 // 13-02-03 Add name (V.Ivanchenko) 43 // 13-02-03 Add name (V.Ivanchenko)
45 // 08-04-05 Major optimisation of internal int 44 // 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
46 // 25-07-05 Add protection in calculation of r 45 // 25-07-05 Add protection in calculation of recoil direction for the case
47 // of complete energy transfer from e 46 // of complete energy transfer from e+ to e- (V.Ivanchenko)
48 // 06-02-06 ComputeCrossSectionPerElectron, Co <<
49 // 15-05-06 Fix MinEnergyCut (V.Ivanchenko) <<
50 // 47 //
51 // 48 //
52 // Class Description: 49 // Class Description:
53 // 50 //
54 // Implementation of energy loss and delta-ele 51 // Implementation of energy loss and delta-electron production by e+/e-
55 // 52 //
56 // ------------------------------------------- 53 // -------------------------------------------------------------------
57 // 54 //
58 //....oooOO0OOooo........oooOO0OOooo........oo << 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
59 //....oooOO0OOooo........oooOO0OOooo........oo << 56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
60 57
61 #include "G4MollerBhabhaModel.hh" 58 #include "G4MollerBhabhaModel.hh"
62 #include "G4PhysicalConstants.hh" <<
63 #include "G4SystemOfUnits.hh" <<
64 #include "G4Electron.hh" 59 #include "G4Electron.hh"
65 #include "G4Positron.hh" 60 #include "G4Positron.hh"
66 #include "Randomize.hh" 61 #include "Randomize.hh"
67 #include "G4ParticleChangeForLoss.hh" 62 #include "G4ParticleChangeForLoss.hh"
68 #include "G4Log.hh" <<
69 #include "G4DeltaAngle.hh" <<
70 63
71 //....oooOO0OOooo........oooOO0OOooo........oo << 64 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
72 65
73 using namespace std; 66 using namespace std;
74 67
75 G4MollerBhabhaModel::G4MollerBhabhaModel(const 68 G4MollerBhabhaModel::G4MollerBhabhaModel(const G4ParticleDefinition* p,
76 const 69 const G4String& nam)
77 : G4VEmModel(nam), 70 : G4VEmModel(nam),
78 particle(nullptr), << 71 particle(0),
79 isElectron(true), << 72 twoln10(2.0*log(10.0)),
80 twoln10(2.0*G4Log(10.0)), << 73 lowLimit(0.2*keV),
81 lowLimit(0.02*keV), << 74 isElectron(true)
82 isInitialised(false) <<
83 { 75 {
>> 76 if(p) SetParticle(p);
84 theElectron = G4Electron::Electron(); 77 theElectron = G4Electron::Electron();
85 if(nullptr != p) { SetParticle(p); } <<
86 fParticleChange = nullptr; <<
87 } 78 }
88 79
89 //....oooOO0OOooo........oooOO0OOooo........oo << 80 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
90 81
91 G4MollerBhabhaModel::~G4MollerBhabhaModel() = << 82 G4MollerBhabhaModel::~G4MollerBhabhaModel()
>> 83 {}
92 84
93 //....oooOO0OOooo........oooOO0OOooo........oo << 85 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
94 86
95 G4double G4MollerBhabhaModel::MaxSecondaryEner << 87 void G4MollerBhabhaModel::SetParticle(const G4ParticleDefinition* p)
96 <<
97 { 88 {
98 G4double tmax = kinEnergy; << 89 particle = p;
99 if(isElectron) { tmax *= 0.5; } << 90 if(p != theElectron) isElectron = false;
100 return tmax; <<
101 } 91 }
102 92
103 //....oooOO0OOooo........oooOO0OOooo........oo << 93 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
104 94
105 void G4MollerBhabhaModel::Initialise(const G4P << 95 G4double G4MollerBhabhaModel::MinEnergyCut(const G4ParticleDefinition*,
106 const G4D << 96 const G4MaterialCutsCouple* couple)
107 { <<
108 if(p != particle) { SetParticle(p); } <<
109 <<
110 if(isInitialised) { return; } <<
111 <<
112 isInitialised = true; <<
113 fParticleChange = GetParticleChangeForLoss() <<
114 if(UseAngularGeneratorFlag() && !GetAngularD <<
115 SetAngularDistribution(new G4DeltaAngle()) <<
116 } <<
117 } <<
118 <<
119 //....oooOO0OOooo........oooOO0OOooo........oo <<
120 <<
121 G4double G4MollerBhabhaModel::ComputeCrossSect <<
122 const G4ParticleDefinition* p, G4doub <<
123 G4double cutEnergy, G4double maxEnergy) <<
124 { <<
125 if(p != particle) { SetParticle(p); } <<
126 <<
127 G4double cross = 0.0; <<
128 G4double tmax = MaxSecondaryEnergy(p, kineti <<
129 tmax = std::min(maxEnergy, tmax); <<
130 //G4cout << "E= " << kineticEnergy << " cut= <<
131 // << " Emax= " << tmax << G4endl; <<
132 if(cutEnergy < tmax) { <<
133 <<
134 G4double xmin = cutEnergy/kineticEnergy; <<
135 G4double xmax = tmax/kineticEnergy; <<
136 G4double tau = kineticEnergy/electron_ma <<
137 G4double gam = tau + 1.0; <<
138 G4double gamma2= gam*gam; <<
139 G4double beta2 = tau*(tau + 2)/gamma2; <<
140 <<
141 //Moller (e-e-) scattering <<
142 if (isElectron) { <<
143 <<
144 G4double gg = (2.0*gam - 1.0)/gamma2; <<
145 cross = ((xmax - xmin)*(1.0 - gg + 1.0/( <<
146 + 1.0/((1.0-xmin <<
147 - gg*G4Log( xmax*(1.0 - xmin)/(xmi <<
148 <<
149 //Bhabha (e+e-) scattering <<
150 } else { <<
151 <<
152 G4double y = 1.0/(1.0 + gam); <<
153 G4double y2 = y*y; <<
154 G4double y12 = 1.0 - 2.0*y; <<
155 G4double b1 = 2.0 - y2; <<
156 G4double b2 = y12*(3.0 + y2); <<
157 G4double y122= y12*y12; <<
158 G4double b4 = y122*y12; <<
159 G4double b3 = b4 + y122; <<
160 <<
161 cross = (xmax - xmin)*(1.0/(beta2*xmin*x <<
162 - 0.5*b3*(xmin + xmax) <<
163 + b4*(xmin*xmin + xmin*xmax + xmax <<
164 - b1*G4Log(xmax/xmin); <<
165 } <<
166 <<
167 cross *= twopi_mc2_rcl2/kineticEnergy; <<
168 } <<
169 return cross; <<
170 } <<
171 <<
172 //....oooOO0OOooo........oooOO0OOooo........oo <<
173 <<
174 G4double G4MollerBhabhaModel::ComputeCrossSect <<
175 con <<
176 <<
177 <<
178 <<
179 <<
180 { 97 {
181 return Z*ComputeCrossSectionPerElectron(p,ki << 98 return couple->GetMaterial()->GetIonisation()->GetMeanExcitationEnergy();
182 } 99 }
183 100
184 //....oooOO0OOooo........oooOO0OOooo........oo << 101 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
185 102
186 G4double G4MollerBhabhaModel::CrossSectionPerV << 103 void G4MollerBhabhaModel::Initialise(const G4ParticleDefinition* p,
187 con << 104 const G4DataVector&)
188 con <<
189 <<
190 <<
191 <<
192 { 105 {
193 G4double eDensity = material->GetElectronDen << 106 if(!particle) SetParticle(p);
194 return eDensity*ComputeCrossSectionPerElectr << 107 if(pParticleChange)
>> 108 fParticleChange = reinterpret_cast<G4ParticleChangeForLoss*>(pParticleChange);
>> 109 else
>> 110 fParticleChange = new G4ParticleChangeForLoss();
195 } 111 }
196 112
197 //....oooOO0OOooo........oooOO0OOooo........oo << 113 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
198 114
199 G4double G4MollerBhabhaModel::ComputeDEDXPerVo 115 G4double G4MollerBhabhaModel::ComputeDEDXPerVolume(
200 cons << 116 const G4Material* material,
201 cons 117 const G4ParticleDefinition* p,
202 118 G4double kineticEnergy,
203 << 119 G4double cutEnergy)
204 { 120 {
205 if(p != particle) { SetParticle(p); } << 121 if(!particle) SetParticle(p);
206 // calculate the dE/dx due to the ionization 122 // calculate the dE/dx due to the ionization by Seltzer-Berger formula
207 // checl low-energy limit <<
208 G4double electronDensity = material->GetElec <<
209 123
210 G4double Zeff = material->GetIonisation()-> << 124 G4double electronDensity = material->GetElectronDensity();
>> 125 G4double Zeff = electronDensity/material->GetTotNbOfAtomsPerVolume();
211 G4double th = 0.25*sqrt(Zeff)*keV; 126 G4double th = 0.25*sqrt(Zeff)*keV;
212 G4double tkin = std::max(kineticEnergy, th); << 127 G4double tkin = kineticEnergy;
213 << 128 G4bool lowEnergy = false;
>> 129 if (kineticEnergy < th) {
>> 130 tkin = th;
>> 131 lowEnergy = true;
>> 132 }
214 G4double tau = tkin/electron_mass_c2; 133 G4double tau = tkin/electron_mass_c2;
215 G4double gam = tau + 1.0; 134 G4double gam = tau + 1.0;
216 G4double gamma2= gam*gam; 135 G4double gamma2= gam*gam;
217 G4double bg2 = tau*(tau + 2); << 136 G4double beta2 = 1. - 1./gamma2;
218 G4double beta2 = bg2/gamma2; << 137 G4double bg2 = beta2*gamma2;
219 138
220 G4double eexc = material->GetIonisation()-> 139 G4double eexc = material->GetIonisation()->GetMeanExcitationEnergy();
221 eexc /= electron_mass_c2; 140 eexc /= electron_mass_c2;
222 G4double eexc2 = eexc*eexc; 141 G4double eexc2 = eexc*eexc;
223 142
224 G4double d = std::min(cut, MaxSecondaryEnerg << 143 G4double d = min(cutEnergy, MaxSecondaryEnergy(p, tkin))/electron_mass_c2;
225 G4double dedx; 144 G4double dedx;
226 145
227 // electron 146 // electron
228 if (isElectron) { 147 if (isElectron) {
229 148
230 dedx = G4Log(2.0*(tau + 2.0)/eexc2) - 1.0 << 149 dedx = log(2.0*(tau + 2.0)/eexc2) - 1.0 - beta2
231 + G4Log((tau-d)*d) + tau/(tau-d) << 150 + log((tau-d)*d) + tau/(tau-d)
232 + (0.5*d*d + (2.0*tau + 1.)*G4Log(1. << 151 + (0.5*d*d + (2.0*tau + 1.)*log(1. - d/tau))/gamma2;
233 152
234 //positron 153 //positron
235 } else { 154 } else {
236 155
237 G4double d2 = d*d*0.5; 156 G4double d2 = d*d*0.5;
238 G4double d3 = d2*d/1.5; 157 G4double d3 = d2*d/1.5;
239 G4double d4 = d3*d*0.75; << 158 G4double d4 = d3*d*3.75;
240 G4double y = 1.0/(1.0 + gam); 159 G4double y = 1.0/(1.0 + gam);
241 dedx = G4Log(2.0*(tau + 2.0)/eexc2) + G4Lo << 160 dedx = log(2.0*(tau + 2.0)/eexc2) + log(tau*d)
242 - beta2*(tau + 2.0*d - y*(3.0*d2 161 - beta2*(tau + 2.0*d - y*(3.0*d2
243 + y*(d - d3 + y*(d2 - tau*d3 + d4)))) 162 + y*(d - d3 + y*(d2 - tau*d3 + d4))))/tau;
244 } 163 }
245 164
246 //density correction 165 //density correction
247 G4double x = G4Log(bg2)/twoln10; << 166 G4double cden = material->GetIonisation()->GetCdensity();
248 dedx -= material->GetIonisation()->DensityCo << 167 G4double mden = material->GetIonisation()->GetMdensity();
>> 168 G4double aden = material->GetIonisation()->GetAdensity();
>> 169 G4double x0den = material->GetIonisation()->GetX0density();
>> 170 G4double x1den = material->GetIonisation()->GetX1density();
>> 171 G4double x = log(bg2)/twoln10;
>> 172
>> 173 if (x >= x0den) {
>> 174 dedx -= twoln10*x - cden;
>> 175 if (x < x1den) dedx -= aden*pow(x1den-x, mden);
>> 176 }
249 177
250 // now you can compute the total ionization 178 // now you can compute the total ionization loss
251 dedx *= twopi_mc2_rcl2*electronDensity/beta2 179 dedx *= twopi_mc2_rcl2*electronDensity/beta2;
252 if (dedx < 0.0) { dedx = 0.0; } << 180 if (dedx < 0.0) dedx = 0.0;
253 << 181
254 // lowenergy extrapolation 182 // lowenergy extrapolation
255 << 183
256 if (kineticEnergy < th) { << 184 if (lowEnergy) {
257 x = kineticEnergy/th; << 185
258 if(x > 0.25) { dedx /= sqrt(x); } << 186 if (kineticEnergy >= lowLimit) dedx *= sqrt(tkin/kineticEnergy);
259 else { dedx *= 1.4*sqrt(x)/(0.1 + x); } << 187 else dedx *= sqrt(tkin*kineticEnergy)/lowLimit;
>> 188
260 } 189 }
261 return dedx; 190 return dedx;
262 } 191 }
263 192
264 //....oooOO0OOooo........oooOO0OOooo........oo << 193 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
265 194
266 void << 195 G4double G4MollerBhabhaModel::CrossSectionPerVolume(
267 G4MollerBhabhaModel::SampleSecondaries(std::ve << 196 const G4Material* material,
268 const G << 197 const G4ParticleDefinition* p,
269 const G << 198 G4double kineticEnergy,
270 G4doubl << 199 G4double cutEnergy,
271 G4doubl << 200 G4double maxEnergy)
272 { 201 {
273 G4double kineticEnergy = dp->GetKineticEnerg << 202 if(!particle) SetParticle(p);
274 //G4cout << "G4MollerBhabhaModel::SampleSeco << 203
275 // << " in " << couple->GetMaterial()- << 204 G4double cross = 0.0;
276 G4double tmax; << 205 G4double tmax = MaxSecondaryEnergy(p, kineticEnergy);
277 G4double tmin = cutEnergy; << 206 tmax = min(maxEnergy, tmax);
278 if(isElectron) { << 207
279 tmax = 0.5*kineticEnergy; << 208 if(cutEnergy < tmax) {
280 } else { << 209
281 tmax = kineticEnergy; << 210 G4double xmin = cutEnergy/kineticEnergy;
>> 211 G4double xmax = tmax/kineticEnergy;
>> 212 G4double gam = kineticEnergy/electron_mass_c2 + 1.0;
>> 213 G4double gamma2= gam*gam;
>> 214 G4double beta2 = 1.0 - 1.0/gamma2;
>> 215
>> 216 //Moller (e-e-) scattering
>> 217 if (isElectron) {
>> 218
>> 219 G4double g = (2.0*gam - 1.0)/gamma2;
>> 220 cross = ((xmax - xmin)*(1.0 - g + 1.0/(xmin*xmax)
>> 221 + 1.0/((1.0-xmin)*(1.0 - xmax)))
>> 222 - g*log( xmax*(1.0 - xmin)/(xmin*(1.0 - xmax)) ) ) / beta2;
>> 223
>> 224 //Bhabha (e+e-) scattering
>> 225 } else {
>> 226
>> 227 G4double y = 1.0/(1.0 + gam);
>> 228 G4double y2 = y*y;
>> 229 G4double y12 = 1.0 - 2.0*y;
>> 230 G4double b1 = 2.0 - y2;
>> 231 G4double b2 = y12*(3.0 + y2);
>> 232 G4double y122= y12*y12;
>> 233 G4double b4 = y122*y12;
>> 234 G4double b3 = b4 + y122;
>> 235
>> 236 cross = (xmax - xmin)*(1.0/(beta2*xmin*xmax) + b2
>> 237 - 0.5*b3*(xmin + xmax)
>> 238 + b4*(xmin*xmin + xmin*xmax + xmax*xmax)/3.0)
>> 239 - b1*log(xmax/xmin);
>> 240 }
>> 241
>> 242 cross *= twopi_mc2_rcl2*(material->GetElectronDensity())/kineticEnergy;
282 } 243 }
283 if(maxEnergy < tmax) { tmax = maxEnergy; } << 244 return cross;
284 if(tmin >= tmax) { return; } << 245 }
>> 246
>> 247 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
285 248
>> 249 std::vector<G4DynamicParticle*>* G4MollerBhabhaModel::SampleSecondaries(
>> 250 const G4MaterialCutsCouple*,
>> 251 const G4DynamicParticle* dp,
>> 252 G4double tmin,
>> 253 G4double maxEnergy)
>> 254 {
>> 255 G4double tmax = std::min(maxEnergy, MaxSecondaryKinEnergy(dp));
>> 256 if(tmin >= tmax) return 0;
>> 257
>> 258 G4double kineticEnergy = dp->GetKineticEnergy();
286 G4double energy = kineticEnergy + electron_m 259 G4double energy = kineticEnergy + electron_mass_c2;
>> 260 G4double totalMomentum = sqrt(kineticEnergy*(energy + electron_mass_c2));
287 G4double xmin = tmin/kineticEnergy; 261 G4double xmin = tmin/kineticEnergy;
288 G4double xmax = tmax/kineticEnergy; 262 G4double xmax = tmax/kineticEnergy;
289 G4double gam = energy/electron_mass_c2; 263 G4double gam = energy/electron_mass_c2;
290 G4double gamma2 = gam*gam; 264 G4double gamma2 = gam*gam;
291 G4double beta2 = 1.0 - 1.0/gamma2; 265 G4double beta2 = 1.0 - 1.0/gamma2;
292 G4double x, z, grej; << 266 G4double x, z, q, grej;
293 CLHEP::HepRandomEngine* rndmEngine = G4Rando << 267
294 G4double rndm[2]; << 268 G4ThreeVector direction = dp->GetMomentumDirection();
295 269
296 //Moller (e-e-) scattering 270 //Moller (e-e-) scattering
297 if (isElectron) { 271 if (isElectron) {
298 272
299 G4double gg = (2.0*gam - 1.0)/gamma2; << 273 G4double g = (2.0*gam - 1.0)/gamma2;
300 G4double y = 1.0 - xmax; 274 G4double y = 1.0 - xmax;
301 grej = 1.0 - gg*xmax + xmax*xmax*(1.0 - gg << 275 grej = 1.0 - g*xmax + xmax*xmax*(1.0 - g + (1.0 - g*y)/(y*y));
302 276
303 do { 277 do {
304 rndmEngine->flatArray(2, rndm); << 278 q = G4UniformRand();
305 x = xmin*xmax/(xmin*(1.0 - rndm[0]) + xm << 279 x = xmin*xmax/(xmin*(1.0 - q) + xmax*q);
306 y = 1.0 - x; 280 y = 1.0 - x;
307 z = 1.0 - gg*x + x*x*(1.0 - gg + (1.0 - << 281 z = 1.0 - g*x + x*x*(1.0 - g + (1.0 - g*y)/(y*y));
308 /* 282 /*
309 if(z > grej) { 283 if(z > grej) {
310 G4cout << "G4MollerBhabhaModel::Sample 284 G4cout << "G4MollerBhabhaModel::SampleSecondary Warning! "
311 << "Majorant " << grej << " < " 285 << "Majorant " << grej << " < "
312 << z << " for x= " << x 286 << z << " for x= " << x
313 << " e-e- scattering" 287 << " e-e- scattering"
314 << G4endl; 288 << G4endl;
315 } 289 }
316 */ 290 */
317 // Loop checking, 03-Aug-2015, Vladimir << 291 } while(grej * G4UniformRand() > z);
318 } while(grej * rndm[1] > z); <<
319 292
320 //Bhabha (e+e-) scattering 293 //Bhabha (e+e-) scattering
321 } else { 294 } else {
322 295
323 G4double y = 1.0/(1.0 + gam); 296 G4double y = 1.0/(1.0 + gam);
324 G4double y2 = y*y; 297 G4double y2 = y*y;
325 G4double y12 = 1.0 - 2.0*y; 298 G4double y12 = 1.0 - 2.0*y;
326 G4double b1 = 2.0 - y2; 299 G4double b1 = 2.0 - y2;
327 G4double b2 = y12*(3.0 + y2); 300 G4double b2 = y12*(3.0 + y2);
328 G4double y122= y12*y12; 301 G4double y122= y12*y12;
329 G4double b4 = y122*y12; 302 G4double b4 = y122*y12;
330 G4double b3 = b4 + y122; 303 G4double b3 = b4 + y122;
331 304
332 y = xmax*xmax; << 305 y = xmax*xmax;
333 grej = 1.0 + (y*y*b4 - xmin*xmin*xmin*b3 + << 306 grej = -xmin*b1;
>> 307 grej += y*b2;
>> 308 grej -= xmin*xmin*xmin*b3;
>> 309 grej += y*y*b4;
>> 310 grej *= beta2;
>> 311 grej += 1.0;
334 do { 312 do {
335 rndmEngine->flatArray(2, rndm); << 313 q = G4UniformRand();
336 x = xmin*xmax/(xmin*(1.0 - rndm[0]) + xm << 314 x = xmin*xmax/(xmin*(1.0 - q) + xmax*q);
337 y = x*x; << 315 z = -x*b1;
338 z = 1.0 + (y*y*b4 - x*y*b3 + y*b2 - x*b1 << 316 y = x*x;
>> 317 z += y*b2;
>> 318 y *= x;
>> 319 z -= y*b3;
>> 320 y *= x;
>> 321 z += y*b4;
>> 322 z *= beta2;
>> 323 z += 1.0;
339 /* 324 /*
340 if(z > grej) { 325 if(z > grej) {
341 G4cout << "G4MollerBhabhaModel::Sample 326 G4cout << "G4MollerBhabhaModel::SampleSecondary Warning! "
342 << "Majorant " << grej << " < " 327 << "Majorant " << grej << " < "
343 << z << " for x= " << x 328 << z << " for x= " << x
344 << " e+e- scattering" 329 << " e+e- scattering"
345 << G4endl; 330 << G4endl;
346 } 331 }
347 */ 332 */
348 // Loop checking, 03-Aug-2015, Vladimir << 333 } while(grej * G4UniformRand() > z);
349 } while(grej * rndm[1] > z); <<
350 } 334 }
351 335
352 G4double deltaKinEnergy = x * kineticEnergy; 336 G4double deltaKinEnergy = x * kineticEnergy;
353 337
354 G4ThreeVector deltaDirection; << 338 G4double deltaMomentum =
355 << 339 sqrt(deltaKinEnergy * (deltaKinEnergy + 2.0*electron_mass_c2));
356 if(UseAngularGeneratorFlag()) { << 340 G4double cost = deltaKinEnergy * (energy + electron_mass_c2) /
357 const G4Material* mat = couple->GetMateri << 341 (deltaMomentum * totalMomentum);
358 G4int Z = SelectRandomAtomNumber(mat); << 342 G4double sint = 1.0 - cost*cost;
>> 343 if(sint > 0.0) sint = sqrt(sint);
359 344
360 deltaDirection = << 345 G4double phi = twopi * G4UniformRand() ;
361 GetAngularDistribution()->SampleDirectio <<
362 346
363 } else { << 347 G4ThreeVector deltaDirection(sint*cos(phi),sint*sin(phi), cost) ;
364 << 348 deltaDirection.rotateUz(direction);
365 G4double deltaMomentum = <<
366 sqrt(deltaKinEnergy * (deltaKinEnergy + <<
367 G4double cost = deltaKinEnergy * (energy + <<
368 (deltaMomentum * dp->GetTotalMomentum()) <<
369 if(cost > 1.0) { cost = 1.0; } <<
370 G4double sint = sqrt((1.0 - cost)*(1.0 + c <<
371 <<
372 G4double phi = twopi * rndmEngine->flat() <<
373 <<
374 deltaDirection.set(sint*cos(phi),sint*sin( <<
375 deltaDirection.rotateUz(dp->GetMomentumDir <<
376 } <<
377 <<
378 // create G4DynamicParticle object for delta <<
379 auto delta = new G4DynamicParticle(theElectr <<
380 vdp->push_back(delta); <<
381 349
382 // primary change 350 // primary change
383 kineticEnergy -= deltaKinEnergy; 351 kineticEnergy -= deltaKinEnergy;
384 G4ThreeVector finalP = dp->GetMomentum() - d <<
385 finalP = finalP.unit(); <<
386 <<
387 fParticleChange->SetProposedKineticEnergy(ki 352 fParticleChange->SetProposedKineticEnergy(kineticEnergy);
388 fParticleChange->SetProposedMomentumDirectio << 353
>> 354 if(kineticEnergy > DBL_MIN) {
>> 355 G4ThreeVector dir = totalMomentum*direction - deltaMomentum*deltaDirection;
>> 356 direction = dir.unit();
>> 357 fParticleChange->SetProposedMomentumDirection(direction);
>> 358 }
>> 359
>> 360 // create G4DynamicParticle object for delta ray
>> 361 std::vector<G4DynamicParticle*>* vdp = new std::vector<G4DynamicParticle*>;
>> 362 G4DynamicParticle* delta = new G4DynamicParticle(theElectron,
>> 363 deltaDirection,deltaKinEnergy);
>> 364 vdp->push_back(delta);
>> 365 return vdp;
389 } 366 }
390 367
391 //....oooOO0OOooo........oooOO0OOooo........oo << 368 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
392 369