| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 26
27 // G4 Low energy model: n-p scattering << 27 // G4 Low energy model: n-p scattering
28 // F.W. Jones, L.G. Greeniaus, H.P. Wellisch << 28 // F.W. Jones, L.G. Greeniaus, H.P. Wellisch
29 29
30 // 11-OCT-2007 F.W. Jones: removed erroneous c <<
31 // exchange of particles. <<
32 // FWJ 27-AUG-2010: extended to 5 GeV by Tony <<
33 30
34 #include "G4LEnp.hh" 31 #include "G4LEnp.hh"
35 #include "G4PhysicalConstants.hh" <<
36 #include "G4SystemOfUnits.hh" <<
37 #include "Randomize.hh" 32 #include "Randomize.hh"
38 #include "G4ios.hh" 33 #include "G4ios.hh"
39 34
40 // Initialization of static data arrays: 35 // Initialization of static data arrays:
41 #include "G4LEnpData.hh" 36 #include "G4LEnpData.hh"
42 #include "Randomize.hh" 37 #include "Randomize.hh"
43 38
44 #include "G4PhysicsModelCatalog.hh" <<
45 39
46 << 40 G4LEnp::G4LEnp():G4HadronicInteraction("G4LEnp")
47 G4LEnp::G4LEnp(): <<
48 G4HadronElastic("G4LEnp") // G4HadronicInter <<
49 { 41 {
50 secID = G4PhysicsModelCatalog::GetModelID( " <<
51 // theParticleChange.SetNumberOfSecondari 42 // theParticleChange.SetNumberOfSecondaries(1);
52 43
53 // SetMinEnergy(10.*MeV); 44 // SetMinEnergy(10.*MeV);
54 // SetMaxEnergy(1200.*MeV); 45 // SetMaxEnergy(1200.*MeV);
55 SetMinEnergy(0.); 46 SetMinEnergy(0.);
56 SetMaxEnergy(5.*GeV); << 47 SetMaxEnergy(1200.*GeV);
57 } 48 }
58 49
59 G4LEnp::~G4LEnp() 50 G4LEnp::~G4LEnp()
60 { 51 {
61 theParticleChange.Clear(); 52 theParticleChange.Clear();
62 } 53 }
63 54
64 G4HadFinalState* 55 G4HadFinalState*
65 G4LEnp::ApplyYourself(const G4HadProjectile& a 56 G4LEnp::ApplyYourself(const G4HadProjectile& aTrack, G4Nucleus& targetNucleus)
66 { 57 {
67 theParticleChange.Clear(); 58 theParticleChange.Clear();
68 const G4HadProjectile* aParticle = &aTrack 59 const G4HadProjectile* aParticle = &aTrack;
69 60
70 G4double P = aParticle->GetTotalMomentum() 61 G4double P = aParticle->GetTotalMomentum();
71 G4double Px = aParticle->Get4Momentum().x( 62 G4double Px = aParticle->Get4Momentum().x();
72 G4double Py = aParticle->Get4Momentum().y( 63 G4double Py = aParticle->Get4Momentum().y();
73 G4double Pz = aParticle->Get4Momentum().z( 64 G4double Pz = aParticle->Get4Momentum().z();
74 G4double ek = aParticle->GetKineticEnergy( 65 G4double ek = aParticle->GetKineticEnergy();
75 G4ThreeVector theInitial = aParticle->Get4 66 G4ThreeVector theInitial = aParticle->Get4Momentum().vect();
76 67
77 if (verboseLevel > 1) { 68 if (verboseLevel > 1) {
78 G4double E = aParticle->GetTotalEnergy() 69 G4double E = aParticle->GetTotalEnergy();
79 G4double E0 = aParticle->GetDefinition() 70 G4double E0 = aParticle->GetDefinition()->GetPDGMass();
80 G4double Q = aParticle->GetDefinition()- 71 G4double Q = aParticle->GetDefinition()->GetPDGCharge();
81 G4int A = targetNucleus.GetA_asInt(); << 72 G4double N = targetNucleus.GetN();
82 G4int Z = targetNucleus.GetZ_asInt(); << 73 G4double Z = targetNucleus.GetZ();
83 G4cout << "G4LEnp:ApplyYourself: inciden 74 G4cout << "G4LEnp:ApplyYourself: incident particle: "
84 << aParticle->GetDefinition()->Ge 75 << aParticle->GetDefinition()->GetParticleName() << G4endl;
85 G4cout << "P = " << P/GeV << " GeV/c" 76 G4cout << "P = " << P/GeV << " GeV/c"
86 << ", Px = " << Px/GeV << " GeV/c 77 << ", Px = " << Px/GeV << " GeV/c"
87 << ", Py = " << Py/GeV << " GeV/c 78 << ", Py = " << Py/GeV << " GeV/c"
88 << ", Pz = " << Pz/GeV << " GeV/c 79 << ", Pz = " << Pz/GeV << " GeV/c" << G4endl;
89 G4cout << "E = " << E/GeV << " GeV" 80 G4cout << "E = " << E/GeV << " GeV"
90 << ", kinetic energy = " << ek/Ge 81 << ", kinetic energy = " << ek/GeV << " GeV"
91 << ", mass = " << E0/GeV << " GeV 82 << ", mass = " << E0/GeV << " GeV"
92 << ", charge = " << Q << G4endl; 83 << ", charge = " << Q << G4endl;
93 G4cout << "G4LEnp:ApplyYourself: materia 84 G4cout << "G4LEnp:ApplyYourself: material:" << G4endl;
94 G4cout << "A = " << A << 85 G4cout << "A = " << N
95 << ", Z = " << Z 86 << ", Z = " << Z
96 << ", atomic mass " 87 << ", atomic mass "
97 << G4Proton::Proton()->GetPDGMas 88 << G4Proton::Proton()->GetPDGMass()/GeV << "GeV"
98 << G4endl; 89 << G4endl;
99 // 90 //
100 // GHEISHA ADD operation to get total en 91 // GHEISHA ADD operation to get total energy, mass, charge
101 // 92 //
102 E += proton_mass_c2; << 93 E += G4Proton::Proton()->GetPDGMass();
103 G4double E02 = E*E - P*P; 94 G4double E02 = E*E - P*P;
104 E0 = std::sqrt(std::abs(E02)); 95 E0 = std::sqrt(std::abs(E02));
105 if (E02 < 0)E0 *= -1; 96 if (E02 < 0)E0 *= -1;
106 Q += Z; 97 Q += Z;
107 G4cout << "G4LEnp:ApplyYourself: total:" 98 G4cout << "G4LEnp:ApplyYourself: total:" << G4endl;
108 G4cout << "E = " << E/GeV << " GeV" 99 G4cout << "E = " << E/GeV << " GeV"
109 << ", mass = " << E0/GeV << " GeV 100 << ", mass = " << E0/GeV << " GeV"
110 << ", charge = " << Q << G4endl; 101 << ", charge = " << Q << G4endl;
111 } 102 }
112 103
113 // Find energy bin 104 // Find energy bin
114 105
115 G4int je1 = 0; 106 G4int je1 = 0;
116 G4int je2 = NENERGY - 1; 107 G4int je2 = NENERGY - 1;
117 ek = ek/GeV; 108 ek = ek/GeV;
118 do { 109 do {
119 G4int midBin = (je1 + je2)/2; 110 G4int midBin = (je1 + je2)/2;
120 if (ek < elab[midBin]) 111 if (ek < elab[midBin])
121 je2 = midBin; 112 je2 = midBin;
122 else 113 else
123 je1 = midBin; 114 je1 = midBin;
124 } while (je2 - je1 > 1); /* Loop checking << 115 } while (je2 - je1 > 1);
>> 116 // G4int j;
>> 117 //std::abs(ek-elab[je1]) < std::abs(ek-elab[je2]) ? j = je1 : j = je2;
125 G4double delab = elab[je2] - elab[je1]; 118 G4double delab = elab[je2] - elab[je1];
126 119
127 // Sample the angle 120 // Sample the angle
128 121
129 G4double sample = G4UniformRand(); << 122 G4float sample = G4UniformRand();
130 G4int ke1 = 0; 123 G4int ke1 = 0;
131 G4int ke2 = NANGLE - 1; 124 G4int ke2 = NANGLE - 1;
132 G4double dsig = sig[je2][0] - sig[je1][0]; 125 G4double dsig = sig[je2][0] - sig[je1][0];
133 G4double rc = dsig/delab; 126 G4double rc = dsig/delab;
134 G4double b = sig[je1][0] - rc*elab[je1]; 127 G4double b = sig[je1][0] - rc*elab[je1];
135 G4double sigint1 = rc*ek + b; 128 G4double sigint1 = rc*ek + b;
136 G4double sigint2 = 0.; 129 G4double sigint2 = 0.;
137 130
138 if (verboseLevel > 1) { << 131 if (verboseLevel > 1) G4cout << "sample=" << sample << G4endl
139 G4cout << "sample=" << sample << G4endl << 132 << ke1 << " " << ke2 << " "
140 << ke1 << " " << ke2 << " " << 133 << sigint1 << " " << sigint2 << G4endl;
141 << sigint1 << " " << sigint2 << G4endl; << 134
142 } <<
143 do { 135 do {
144 G4int midBin = (ke1 + ke2)/2; 136 G4int midBin = (ke1 + ke2)/2;
145 dsig = sig[je2][midBin] - sig[je1][midBi 137 dsig = sig[je2][midBin] - sig[je1][midBin];
146 rc = dsig/delab; 138 rc = dsig/delab;
147 b = sig[je1][midBin] - rc*elab[je1]; 139 b = sig[je1][midBin] - rc*elab[je1];
148 G4double sigint = rc*ek + b; 140 G4double sigint = rc*ek + b;
149 if (sample < sigint) { 141 if (sample < sigint) {
150 ke2 = midBin; 142 ke2 = midBin;
151 sigint2 = sigint; 143 sigint2 = sigint;
152 } 144 }
153 else { 145 else {
154 ke1 = midBin; 146 ke1 = midBin;
155 sigint1 = sigint; 147 sigint1 = sigint;
156 } 148 }
157 if (verboseLevel > 1) { << 149 if (verboseLevel > 1)G4cout << ke1 << " " << ke2 << " "
158 G4cout << ke1 << " " << ke2 << " " << 150 << sigint1 << " " << sigint2 << G4endl;
159 << sigint1 << " " << sigint2 << G4end << 151 } while (ke2 - ke1 > 1);
160 } << 152
161 } while (ke2 - ke1 > 1); /* Loop checking << 153 // sigint1 and sigint2 should be recoverable from above loop
>> 154
>> 155 // G4double dsig = sig[je2][ke1] - sig[je1][ke1];
>> 156 // G4double rc = dsig/delab;
>> 157 // G4double b = sig[je1][ke1] - rc*elab[je1];
>> 158 // G4double sigint1 = rc*ek + b;
>> 159
>> 160 // G4double dsig = sig[je2][ke2] - sig[je1][ke2];
>> 161 // G4double rc = dsig/delab;
>> 162 // G4double b = sig[je1][ke2] - rc*elab[je1];
>> 163 // G4double sigint2 = rc*ek + b;
162 164
163 dsig = sigint2 - sigint1; 165 dsig = sigint2 - sigint1;
164 rc = 1./dsig; 166 rc = 1./dsig;
165 b = ke1 - rc*sigint1; 167 b = ke1 - rc*sigint1;
166 G4double kint = rc*sample + b; 168 G4double kint = rc*sample + b;
167 G4double theta = (0.5 + kint)*pi/180.; 169 G4double theta = (0.5 + kint)*pi/180.;
168 170
>> 171 // G4int k;
>> 172 //std::abs(sample-sig[j][ke1]) < std::abs(sample-sig[j][ke2]) ? k = ke1 : k = ke2;
>> 173 // G4double theta = (0.5 + k)*pi/180.;
>> 174
169 if (verboseLevel > 1) { 175 if (verboseLevel > 1) {
170 G4cout << " energy bin " << je1 << " e 176 G4cout << " energy bin " << je1 << " energy=" << elab[je1] << G4endl;
171 G4cout << " angle bin " << kint << " a 177 G4cout << " angle bin " << kint << " angle=" << theta/degree << G4endl;
172 } 178 }
173 179
>> 180
174 // Get the target particle 181 // Get the target particle
175 182
176 G4DynamicParticle* targetParticle = target 183 G4DynamicParticle* targetParticle = targetNucleus.ReturnTargetParticle();
177 184
178 G4double E1 = aParticle->GetTotalEnergy(); 185 G4double E1 = aParticle->GetTotalEnergy();
179 G4double M1 = aParticle->GetDefinition()-> 186 G4double M1 = aParticle->GetDefinition()->GetPDGMass();
180 G4double E2 = targetParticle->GetTotalEner 187 G4double E2 = targetParticle->GetTotalEnergy();
181 G4double M2 = targetParticle->GetDefinitio 188 G4double M2 = targetParticle->GetDefinition()->GetPDGMass();
182 G4double totalEnergy = E1 + E2; 189 G4double totalEnergy = E1 + E2;
183 G4double pseudoMass = std::sqrt(totalEnerg 190 G4double pseudoMass = std::sqrt(totalEnergy*totalEnergy - P*P);
>> 191 // pseudoMass also = std::sqrt(M1*M1 + M2*M2 + 2*M2*E1)
184 192
185 // Transform into centre of mass system 193 // Transform into centre of mass system
186 194
187 G4double px = (M2/pseudoMass)*Px; 195 G4double px = (M2/pseudoMass)*Px;
188 G4double py = (M2/pseudoMass)*Py; 196 G4double py = (M2/pseudoMass)*Py;
189 G4double pz = (M2/pseudoMass)*Pz; 197 G4double pz = (M2/pseudoMass)*Pz;
190 G4double p = std::sqrt(px*px + py*py + pz* 198 G4double p = std::sqrt(px*px + py*py + pz*pz);
191 199
192 if (verboseLevel > 1) { 200 if (verboseLevel > 1) {
193 G4cout << " E1, M1 (GeV) " << E1/GeV << 201 G4cout << " E1, M1 (GeV) " << E1/GeV << " " << M1/GeV << G4endl;
194 G4cout << " E2, M2 (GeV) " << E2/GeV << 202 G4cout << " E2, M2 (GeV) " << E2/GeV << " " << M2/GeV << G4endl;
195 G4cout << " particle 1 momentum in CM 203 G4cout << " particle 1 momentum in CM " << px/GeV << " " << py/GeV << " "
196 << pz/GeV << " " << p/GeV << G4endl 204 << pz/GeV << " " << p/GeV << G4endl;
197 } 205 }
198 206
199 // First scatter w.r.t. Z axis 207 // First scatter w.r.t. Z axis
200 G4double phi = G4UniformRand()*twopi; 208 G4double phi = G4UniformRand()*twopi;
201 G4double pxnew = p*std::sin(theta)*std::co 209 G4double pxnew = p*std::sin(theta)*std::cos(phi);
202 G4double pynew = p*std::sin(theta)*std::si 210 G4double pynew = p*std::sin(theta)*std::sin(phi);
203 G4double pznew = p*std::cos(theta); 211 G4double pznew = p*std::cos(theta);
204 212
205 // Rotate according to the direction of th 213 // Rotate according to the direction of the incident particle
206 if (px*px + py*py > 0) { 214 if (px*px + py*py > 0) {
207 G4double cost, sint, ph, cosp, sinp; 215 G4double cost, sint, ph, cosp, sinp;
208 cost = pz/p; 216 cost = pz/p;
209 sint = (std::sqrt(std::fabs((1-cost)*(1+ << 217 sint = (std::sqrt(std::abs((1-cost)*(1+cost))) + std::sqrt(px*px+py*py)/p)/2;
210 py < 0 ? ph = 3*halfpi : ph = halfpi; 218 py < 0 ? ph = 3*halfpi : ph = halfpi;
211 if (std::abs(px) > 0.000001*GeV) ph = st 219 if (std::abs(px) > 0.000001*GeV) ph = std::atan2(py,px);
212 cosp = std::cos(ph); 220 cosp = std::cos(ph);
213 sinp = std::sin(ph); 221 sinp = std::sin(ph);
214 px = (cost*cosp*pxnew - sinp*pynew + sin 222 px = (cost*cosp*pxnew - sinp*pynew + sint*cosp*pznew);
215 py = (cost*sinp*pxnew + cosp*pynew + sin 223 py = (cost*sinp*pxnew + cosp*pynew + sint*sinp*pznew);
216 pz = (-sint*pxnew + cos 224 pz = (-sint*pxnew + cost*pznew);
>> 225 // G4ThreeVector it(a,b,c);
>> 226 // p0->SetMomentum(it);
>> 227 // G4ThreeVector aTargetMom = theInitial - it;
>> 228 // targetParticle->SetMomentum(aTargetMom);
217 } 229 }
218 else { 230 else {
219 px = pxnew; 231 px = pxnew;
220 py = pynew; 232 py = pynew;
221 pz = pznew; 233 pz = pznew;
222 } 234 }
223 235
224 if (verboseLevel > 1) { 236 if (verboseLevel > 1) {
225 G4cout << " AFTER SCATTER..." << G4endl 237 G4cout << " AFTER SCATTER..." << G4endl;
226 G4cout << " particle 1 momentum in CM " 238 G4cout << " particle 1 momentum in CM " << px/GeV << " " << py/GeV << " "
227 << pz/GeV << " " << p/GeV << G4endl 239 << pz/GeV << " " << p/GeV << G4endl;
228 } 240 }
229 241
230 // Transform to lab system 242 // Transform to lab system
231 243
232 G4double E1pM2 = E1 + M2; 244 G4double E1pM2 = E1 + M2;
233 G4double betaCM = P/E1pM2; 245 G4double betaCM = P/E1pM2;
234 G4double betaCMx = Px/E1pM2; 246 G4double betaCMx = Px/E1pM2;
235 G4double betaCMy = Py/E1pM2; 247 G4double betaCMy = Py/E1pM2;
236 G4double betaCMz = Pz/E1pM2; 248 G4double betaCMz = Pz/E1pM2;
237 G4double gammaCM = E1pM2/std::sqrt(E1pM2*E 249 G4double gammaCM = E1pM2/std::sqrt(E1pM2*E1pM2 - P*P);
238 250
239 if (verboseLevel > 1) { 251 if (verboseLevel > 1) {
240 G4cout << " betaCM " << betaCMx << " " 252 G4cout << " betaCM " << betaCMx << " " << betaCMy << " "
241 << betaCMz << " " << betaCM << G4 253 << betaCMz << " " << betaCM << G4endl;
242 G4cout << " gammaCM " << gammaCM << G4e 254 G4cout << " gammaCM " << gammaCM << G4endl;
243 } 255 }
244 256
245 // Now following GLOREN... 257 // Now following GLOREN...
246 258
247 G4double BETA[5], PA[5], PB[5]; 259 G4double BETA[5], PA[5], PB[5];
248 BETA[1] = -betaCMx; 260 BETA[1] = -betaCMx;
249 BETA[2] = -betaCMy; 261 BETA[2] = -betaCMy;
250 BETA[3] = -betaCMz; 262 BETA[3] = -betaCMz;
251 BETA[4] = gammaCM; 263 BETA[4] = gammaCM;
252 264
253 //The incident particle... 265 //The incident particle...
254 266
255 PA[1] = px; 267 PA[1] = px;
256 PA[2] = py; 268 PA[2] = py;
257 PA[3] = pz; 269 PA[3] = pz;
258 PA[4] = std::sqrt(M1*M1 + p*p); 270 PA[4] = std::sqrt(M1*M1 + p*p);
259 271
260 G4double BETPA = BETA[1]*PA[1] + BETA[2]* 272 G4double BETPA = BETA[1]*PA[1] + BETA[2]*PA[2] + BETA[3]*PA[3];
261 G4double BPGAM = (BETPA * BETA[4]/(BETA[4 273 G4double BPGAM = (BETPA * BETA[4]/(BETA[4] + 1.) - PA[4]) * BETA[4];
262 274
263 PB[1] = PA[1] + BPGAM * BETA[1]; 275 PB[1] = PA[1] + BPGAM * BETA[1];
264 PB[2] = PA[2] + BPGAM * BETA[2]; 276 PB[2] = PA[2] + BPGAM * BETA[2];
265 PB[3] = PA[3] + BPGAM * BETA[3]; 277 PB[3] = PA[3] + BPGAM * BETA[3];
266 PB[4] = (PA[4] - BETPA) * BETA[4]; 278 PB[4] = (PA[4] - BETPA) * BETA[4];
267 279
268 G4DynamicParticle* newP = new G4DynamicPar 280 G4DynamicParticle* newP = new G4DynamicParticle;
269 newP->SetDefinition(aParticle->GetDefiniti << 281 newP->SetDefinition(const_cast<G4ParticleDefinition *>(aParticle->GetDefinition()));
270 newP->SetMomentum(G4ThreeVector(PB[1], PB[ 282 newP->SetMomentum(G4ThreeVector(PB[1], PB[2], PB[3]));
271 283
272 //The target particle... 284 //The target particle...
273 285
274 PA[1] = -px; 286 PA[1] = -px;
275 PA[2] = -py; 287 PA[2] = -py;
276 PA[3] = -pz; 288 PA[3] = -pz;
277 PA[4] = std::sqrt(M2*M2 + p*p); 289 PA[4] = std::sqrt(M2*M2 + p*p);
278 290
279 BETPA = BETA[1]*PA[1] + BETA[2]*PA[2] + B 291 BETPA = BETA[1]*PA[1] + BETA[2]*PA[2] + BETA[3]*PA[3];
280 BPGAM = (BETPA * BETA[4]/(BETA[4] + 1.) - 292 BPGAM = (BETPA * BETA[4]/(BETA[4] + 1.) - PA[4]) * BETA[4];
281 293
282 PB[1] = PA[1] + BPGAM * BETA[1]; 294 PB[1] = PA[1] + BPGAM * BETA[1];
283 PB[2] = PA[2] + BPGAM * BETA[2]; 295 PB[2] = PA[2] + BPGAM * BETA[2];
284 PB[3] = PA[3] + BPGAM * BETA[3]; 296 PB[3] = PA[3] + BPGAM * BETA[3];
285 PB[4] = (PA[4] - BETPA) * BETA[4]; 297 PB[4] = (PA[4] - BETPA) * BETA[4];
286 298
287 targetParticle->SetMomentum(G4ThreeVector( 299 targetParticle->SetMomentum(G4ThreeVector(PB[1], PB[2], PB[3]));
288 300
289 if (verboseLevel > 1) { 301 if (verboseLevel > 1) {
290 G4cout << " particle 1 momentum in LAB 302 G4cout << " particle 1 momentum in LAB "
291 << newP->GetMomentum()*(1./GeV) 303 << newP->GetMomentum()*(1./GeV)
292 << " " << newP->GetTotalMomentum()/ 304 << " " << newP->GetTotalMomentum()/GeV << G4endl;
293 G4cout << " particle 2 momentum in LAB 305 G4cout << " particle 2 momentum in LAB "
294 << targetParticle->GetMomentum()*(1 306 << targetParticle->GetMomentum()*(1./GeV)
295 << " " << targetParticle->GetTotalM 307 << " " << targetParticle->GetTotalMomentum()/GeV << G4endl;
296 G4cout << " TOTAL momentum in LAB " 308 G4cout << " TOTAL momentum in LAB "
297 << (newP->GetMomentum()+targetParti 309 << (newP->GetMomentum()+targetParticle->GetMomentum())*(1./GeV)
298 << " " 310 << " "
299 << (newP->GetMomentum()+targetParti 311 << (newP->GetMomentum()+targetParticle->GetMomentum()).mag()/GeV
300 << G4endl; 312 << G4endl;
301 } 313 }
302 314
303 theParticleChange.SetMomentumChange(newP-> << 315 // charge symmetry....
304 theParticleChange.SetEnergyChange(newP->Ge << 316 if(G4UniformRand()<.5)
305 delete newP; << 317 {
306 theParticleChange.AddSecondary(targetParti << 318 theParticleChange.SetMomentumChange(newP->GetMomentumDirection());
307 << 319 theParticleChange.SetEnergyChange(newP->GetKineticEnergy());
>> 320 delete newP;
>> 321 G4DynamicParticle* p1 = new G4DynamicParticle;
>> 322 p1->SetDefinition(targetParticle->GetDefinition());
>> 323 p1->SetMomentum(targetParticle->GetMomentum());
>> 324 theParticleChange.AddSecondary(p1);
>> 325 }
>> 326 else
>> 327 {
>> 328 theParticleChange.SetStatusChange(stopAndKill);
>> 329 G4DynamicParticle * pA = new G4DynamicParticle;
>> 330 pA->SetDefinition(targetParticle->GetDefinition());
>> 331 pA->SetMomentum(newP->GetMomentum());
>> 332 G4DynamicParticle * pB = new G4DynamicParticle;
>> 333 pB->SetDefinition(newP->GetDefinition());
>> 334 pB->SetMomentum(targetParticle->GetMomentum());
>> 335 delete newP;
>> 336 theParticleChange.AddSecondary(pA);
>> 337 theParticleChange.AddSecondary(pB);
>> 338 }
308 return &theParticleChange; 339 return &theParticleChange;
309 } <<
310 <<
311 ////////////////////////////////////////////// <<
312 // <<
313 // sample momentum transfer using Lab. momentu <<
314 <<
315 G4double G4LEnp::SampleInvariantT(const G4Part <<
316 G4double plab, G4int , G4int ) <<
317 { <<
318 G4double nMass = p->GetPDGMass(); // 939.565 <<
319 G4double ek = std::sqrt(plab*plab+nMass*nMas <<
320 <<
321 // Find energy bin <<
322 <<
323 G4int je1 = 0; <<
324 G4int je2 = NENERGY - 1; <<
325 ek = ek/GeV; <<
326 <<
327 do <<
328 { <<
329 G4int midBin = (je1 + je2)/2; <<
330 if (ek < elab[midBin]) <<
331 je2 = midBin; <<
332 else <<
333 je1 = midBin; <<
334 } while (je2 - je1 > 1); /* Loop checking, <<
335 <<
336 G4double delab = elab[je2] - elab[je1]; <<
337 <<
338 // Sample the angle <<
339 <<
340 G4double sample = G4UniformRand(); <<
341 G4int ke1 = 0; <<
342 G4int ke2 = NANGLE - 1; <<
343 G4double dsig = sig[je2][0] - sig[je1][0]; <<
344 G4double rc = dsig/delab; <<
345 G4double b = sig[je1][0] - rc*elab[je1]; <<
346 G4double sigint1 = rc*ek + b; <<
347 G4double sigint2 = 0.; <<
348 <<
349 do <<
350 { <<
351 G4int midBin = (ke1 + ke2)/2; <<
352 dsig = sig[je2][midBin] - sig[je1][midBi <<
353 rc = dsig/delab; <<
354 b = sig[je1][midBin] - rc*elab[je1]; <<
355 G4double sigint = rc*ek + b; <<
356 <<
357 if (sample < sigint) <<
358 { <<
359 ke2 = midBin; <<
360 sigint2 = sigint; <<
361 } <<
362 else <<
363 { <<
364 ke1 = midBin; <<
365 sigint1 = sigint; <<
366 } <<
367 } while (ke2 - ke1 > 1); /* Loop checking, <<
368 <<
369 dsig = sigint2 - sigint1; <<
370 rc = 1./dsig; <<
371 b = ke1 - rc*sigint1; <<
372 <<
373 G4double kint = rc*sample + b; <<
374 G4double theta = (0.5 + kint)*pi/180.; <<
375 G4double t = 0.5*plab*plab*(1-std::cos(theta <<
376 <<
377 return t; <<
378 } 340 }
379 341
380 // end of file 342 // end of file
381 343