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35 // 35 //
36 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 36 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
37 // 37 //
38 // MODULE: G4WilsonAbrasionModel. 38 // MODULE: G4WilsonAbrasionModel.cc
39 // 39 //
40 // Version: 1.0 40 // Version: 1.0
41 // Date: 08/12/2009 41 // Date: 08/12/2009
42 // Author: P R Truscott 42 // Author: P R Truscott
43 // Organisation: QinetiQ Ltd, UK 43 // Organisation: QinetiQ Ltd, UK
44 // Customer: ESA/ESTEC, NOORDWIJK 44 // Customer: ESA/ESTEC, NOORDWIJK
45 // Contract: 17191/03/NL/LvH 45 // Contract: 17191/03/NL/LvH
46 // 46 //
47 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 47 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
48 // 48 //
49 // CHANGE HISTORY 49 // CHANGE HISTORY
50 // -------------- 50 // --------------
51 // 51 //
52 // 6 October 2003, P R Truscott, QinetiQ Ltd, 52 // 6 October 2003, P R Truscott, QinetiQ Ltd, UK
53 // Created. 53 // Created.
54 // 54 //
55 // 15 March 2004, P R Truscott, QinetiQ Ltd, U 55 // 15 March 2004, P R Truscott, QinetiQ Ltd, UK
56 // Beta release 56 // Beta release
57 // 57 //
58 // 18 January 2005, M H Mendenhall, Vanderbilt 58 // 18 January 2005, M H Mendenhall, Vanderbilt University, US
59 // Pointers to theAbrasionGeometry and product 59 // Pointers to theAbrasionGeometry and products generated by the deexcitation
60 // handler deleted to prevent memory leaks. A 60 // handler deleted to prevent memory leaks. Also particle change of projectile
61 // fragment previously not properly defined. 61 // fragment previously not properly defined.
62 // 62 //
63 // 08 December 2009, P R Truscott, QinetiQ Ltd 63 // 08 December 2009, P R Truscott, QinetiQ Ltd, Ltd
64 // ver 1.0 64 // ver 1.0
65 // There was originally a possibility of the m 65 // There was originally a possibility of the minimum impact parameter AFTER
66 // considering Couloumb repulsion, rm, being t 66 // considering Couloumb repulsion, rm, being too large. Now if:
67 // rm >= fradius * (rP + rT) 67 // rm >= fradius * (rP + rT)
68 // where fradius is currently 0.99, then it is 68 // where fradius is currently 0.99, then it is assumed the primary track is
69 // unchanged. Additional conditions to escape 69 // unchanged. Additional conditions to escape from while-loop over impact
70 // parameter: if the loop counter evtcnt reach 70 // parameter: if the loop counter evtcnt reaches 1000, the primary track is
71 // continued. 71 // continued.
72 // Additional clauses have been included in 72 // Additional clauses have been included in
73 // G4WilsonAbrasionModel::GetNucleonInduced 73 // G4WilsonAbrasionModel::GetNucleonInducedExcitation
74 // Previously it was possible to get sqrt of n 74 // Previously it was possible to get sqrt of negative number as Wilson
75 // algorithm not properly defined if either: 75 // algorithm not properly defined if either:
76 // rT > rP && rsq < rTsq - rPsq) or (rP > r 76 // rT > rP && rsq < rTsq - rPsq) or (rP > rT && rsq < rPsq - rTsq)
77 // 77 //
78 // 12 June 2012, A. Ribon, CERN, Switzerland 78 // 12 June 2012, A. Ribon, CERN, Switzerland
79 // Fixing trivial warning errors of shadowed v 79 // Fixing trivial warning errors of shadowed variables.
80 // 80 //
81 // 4 August 2015, A. Ribon, CERN, Switzerland 81 // 4 August 2015, A. Ribon, CERN, Switzerland
82 // Replacing std::exp and std::pow with the fa 82 // Replacing std::exp and std::pow with the faster versions G4Exp and G4Pow.
83 // 83 //
84 // 7 August 2015, A. Ribon, CERN, Switzerland 84 // 7 August 2015, A. Ribon, CERN, Switzerland
85 // Checking of 'while' loops. 85 // Checking of 'while' loops.
86 // 86 //
87 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 87 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
88 ////////////////////////////////////////////// 88 ///////////////////////////////////////////////////////////////////////////////
89 89
90 #include "G4WilsonAbrasionModel.hh" 90 #include "G4WilsonAbrasionModel.hh"
91 #include "G4WilsonRadius.hh" 91 #include "G4WilsonRadius.hh"
92 #include "G4NuclearAbrasionGeometry.hh" 92 #include "G4NuclearAbrasionGeometry.hh"
93 #include "G4WilsonAblationModel.hh" 93 #include "G4WilsonAblationModel.hh"
94 94
95 #include "G4PhysicalConstants.hh" 95 #include "G4PhysicalConstants.hh"
96 #include "G4SystemOfUnits.hh" 96 #include "G4SystemOfUnits.hh"
97 #include "G4ExcitationHandler.hh" 97 #include "G4ExcitationHandler.hh"
98 #include "G4Evaporation.hh" 98 #include "G4Evaporation.hh"
99 #include "G4ParticleDefinition.hh" 99 #include "G4ParticleDefinition.hh"
100 #include "G4DynamicParticle.hh" 100 #include "G4DynamicParticle.hh"
101 #include "Randomize.hh" 101 #include "Randomize.hh"
102 #include "G4Fragment.hh" 102 #include "G4Fragment.hh"
103 #include "G4ReactionProductVector.hh" 103 #include "G4ReactionProductVector.hh"
104 #include "G4LorentzVector.hh" 104 #include "G4LorentzVector.hh"
105 #include "G4ParticleMomentum.hh" 105 #include "G4ParticleMomentum.hh"
106 #include "G4Poisson.hh" 106 #include "G4Poisson.hh"
107 #include "G4ParticleTable.hh" 107 #include "G4ParticleTable.hh"
108 #include "G4IonTable.hh" 108 #include "G4IonTable.hh"
109 #include "globals.hh" 109 #include "globals.hh"
110 110
111 #include "G4Exp.hh" 111 #include "G4Exp.hh"
112 #include "G4Pow.hh" 112 #include "G4Pow.hh"
113 113
114 #include "G4PhysicsModelCatalog.hh" <<
115 <<
116 114
117 G4WilsonAbrasionModel::G4WilsonAbrasionModel(G 115 G4WilsonAbrasionModel::G4WilsonAbrasionModel(G4bool useAblation1)
118 : G4HadronicInteraction("G4WilsonAbrasion"), << 116 :G4HadronicInteraction("G4WilsonAbrasion")
119 { 117 {
120 // Send message to stdout to advise that the 118 // Send message to stdout to advise that the G4Abrasion model is being used.
121 PrintWelcomeMessage(); 119 PrintWelcomeMessage();
122 120
123 // Set the default verbose level to 0 - no o 121 // Set the default verbose level to 0 - no output.
124 verboseLevel = 0; 122 verboseLevel = 0;
125 useAblation = useAblation1; 123 useAblation = useAblation1;
126 theAblation = nullptr; 124 theAblation = nullptr;
127 125
128 // No de-excitation handler has been supplie 126 // No de-excitation handler has been supplied - define the default handler.
129 127
130 theExcitationHandler = new G4ExcitationHandl 128 theExcitationHandler = new G4ExcitationHandler();
131 if (useAblation) 129 if (useAblation)
132 { 130 {
133 theAblation = new G4WilsonAblationModel; 131 theAblation = new G4WilsonAblationModel;
134 theAblation->SetVerboseLevel(verboseLevel) 132 theAblation->SetVerboseLevel(verboseLevel);
135 theExcitationHandler->SetEvaporation(theAb 133 theExcitationHandler->SetEvaporation(theAblation, true);
136 } 134 }
137 135
138 // Set the minimum and maximum range for the 136 // Set the minimum and maximum range for the model (despite nomanclature,
139 // this is in energy per nucleon number). 137 // this is in energy per nucleon number).
140 138
141 SetMinEnergy(70.0*MeV); 139 SetMinEnergy(70.0*MeV);
142 SetMaxEnergy(10.1*GeV); 140 SetMaxEnergy(10.1*GeV);
143 isBlocked = false; 141 isBlocked = false;
144 142
145 // npK, when mutiplied by the nuclear Fermi 143 // npK, when mutiplied by the nuclear Fermi momentum, determines the range of
146 // momentum over which the secondary nucleon 144 // momentum over which the secondary nucleon momentum is sampled.
147 145
148 r0sq = 0.0; 146 r0sq = 0.0;
149 npK = 5.0; 147 npK = 5.0;
150 B = 10.0 * MeV; 148 B = 10.0 * MeV;
151 third = 1.0 / 3.0; 149 third = 1.0 / 3.0;
152 fradius = 0.99; 150 fradius = 0.99;
153 conserveEnergy = false; 151 conserveEnergy = false;
154 conserveMomentum = true; 152 conserveMomentum = true;
155 <<
156 // Creator model ID for the secondaries crea <<
157 secID = G4PhysicsModelCatalog::GetModelID( " <<
158 } 153 }
159 154
160 void G4WilsonAbrasionModel::ModelDescription(s 155 void G4WilsonAbrasionModel::ModelDescription(std::ostream& outFile) const
161 { 156 {
162 outFile << "G4WilsonAbrasionModel is a macro 157 outFile << "G4WilsonAbrasionModel is a macroscopic treatment of\n"
163 << "nucleus-nucleus collisions using 158 << "nucleus-nucleus collisions using simple geometric arguments.\n"
164 << "The smaller projectile nucleus g 159 << "The smaller projectile nucleus gouges out a part of the larger\n"
165 << "target nucleus, leaving a residu 160 << "target nucleus, leaving a residual nucleus and a fireball\n"
166 << "region where the projectile and 161 << "region where the projectile and target intersect. The fireball"
167 << "is then treated as a highly exci 162 << "is then treated as a highly excited nuclear fragment. This\n"
168 << "model is based on the NUCFRG2 mo 163 << "model is based on the NUCFRG2 model and is valid for all\n"
169 << "projectile energies between 70 M 164 << "projectile energies between 70 MeV/n and 10.1 GeV/n. \n";
170 } 165 }
171 166
172 G4WilsonAbrasionModel::G4WilsonAbrasionModel(G << 167 G4WilsonAbrasionModel::G4WilsonAbrasionModel(G4ExcitationHandler* aExcitationHandler)
173 G4HadronicInteraction("G4WilsonAbrasion"), se <<
174 { 168 {
175 // Send message to stdout to advise that the G 169 // Send message to stdout to advise that the G4Abrasion model is being used.
176 170
177 PrintWelcomeMessage(); 171 PrintWelcomeMessage();
178 172
179 // Set the default verbose level to 0 - no out 173 // Set the default verbose level to 0 - no output.
180 174
181 verboseLevel = 0; 175 verboseLevel = 0;
182 176
183 theAblation = nullptr; //A.R. 26-Jul-2012 177 theAblation = nullptr; //A.R. 26-Jul-2012 Coverity fix.
184 useAblation = false; //A.R. 14-Aug-2012 178 useAblation = false; //A.R. 14-Aug-2012 Coverity fix.
185 179
186 // 180 //
187 // The user is able to provide the excitation 181 // The user is able to provide the excitation handler as well as an argument
188 // which is provided in this instantiation is 182 // which is provided in this instantiation is used to determine
189 // whether the spectators of the interaction a 183 // whether the spectators of the interaction are free following the abrasion.
190 // 184 //
191 theExcitationHandler = aExcitationHandler; 185 theExcitationHandler = aExcitationHandler;
192 // 186 //
193 // 187 //
194 // Set the minimum and maximum range for the m 188 // Set the minimum and maximum range for the model (despite nomanclature, this
195 // is in energy per nucleon number). 189 // is in energy per nucleon number).
196 // 190 //
197 SetMinEnergy(70.0*MeV); 191 SetMinEnergy(70.0*MeV);
198 SetMaxEnergy(10.1*GeV); 192 SetMaxEnergy(10.1*GeV);
199 isBlocked = false; 193 isBlocked = false;
200 // 194 //
201 // 195 //
202 // npK, when mutiplied by the nuclear Fermi mo 196 // npK, when mutiplied by the nuclear Fermi momentum, determines the range of
203 // momentum over which the secondary nucleon m 197 // momentum over which the secondary nucleon momentum is sampled.
204 // 198 //
205 r0sq = 0.0; << 199 r0sq = 0.0; //A.R. 14-Aug-2012 Coverity fix.
206 npK = 5.0; 200 npK = 5.0;
207 B = 10.0 * MeV; 201 B = 10.0 * MeV;
208 third = 1.0 / 3.0; 202 third = 1.0 / 3.0;
209 fradius = 0.99; 203 fradius = 0.99;
210 conserveEnergy = false; 204 conserveEnergy = false;
211 conserveMomentum = true; 205 conserveMomentum = true;
212 <<
213 // Creator model ID for the secondaries crea <<
214 secID = G4PhysicsModelCatalog::GetModelID( " <<
215 } 206 }
216 ////////////////////////////////////////////// 207 ////////////////////////////////////////////////////////////////////////////////
217 // 208 //
218 G4WilsonAbrasionModel::~G4WilsonAbrasionModel( 209 G4WilsonAbrasionModel::~G4WilsonAbrasionModel()
219 { 210 {
220 delete theExcitationHandler; 211 delete theExcitationHandler;
221 } 212 }
222 ////////////////////////////////////////////// 213 ////////////////////////////////////////////////////////////////////////////////
223 // 214 //
224 G4HadFinalState *G4WilsonAbrasionModel::ApplyY 215 G4HadFinalState *G4WilsonAbrasionModel::ApplyYourself (
225 const G4HadProjectile &theTrack, G4Nucleus & 216 const G4HadProjectile &theTrack, G4Nucleus &theTarget)
226 { 217 {
227 // 218 //
228 // 219 //
229 // The secondaries will be returned in G4HadFi 220 // The secondaries will be returned in G4HadFinalState &theParticleChange -
230 // initialise this. The original track will a 221 // initialise this. The original track will always be discontinued and
231 // secondaries followed. 222 // secondaries followed.
232 // 223 //
233 theParticleChange.Clear(); 224 theParticleChange.Clear();
234 theParticleChange.SetStatusChange(stopAndKil 225 theParticleChange.SetStatusChange(stopAndKill);
235 // 226 //
236 // 227 //
237 // Get relevant information about the projecti 228 // Get relevant information about the projectile and target (A, Z, energy/nuc,
238 // momentum, etc). 229 // momentum, etc).
239 // 230 //
240 const G4ParticleDefinition *definitionP = th 231 const G4ParticleDefinition *definitionP = theTrack.GetDefinition();
241 const G4double AP = definitionP->GetBaryonN 232 const G4double AP = definitionP->GetBaryonNumber();
242 const G4double ZP = definitionP->GetPDGChar 233 const G4double ZP = definitionP->GetPDGCharge();
243 G4LorentzVector pP = theTrack.Get4Momentum() 234 G4LorentzVector pP = theTrack.Get4Momentum();
244 G4double E = theTrack.GetKineticEner 235 G4double E = theTrack.GetKineticEnergy()/AP;
245 G4double AT = theTarget.GetA_asInt(); 236 G4double AT = theTarget.GetA_asInt();
246 G4double ZT = theTarget.GetZ_asInt(); 237 G4double ZT = theTarget.GetZ_asInt();
247 G4double TotalEPre = theTrack.GetTotalEnergy 238 G4double TotalEPre = theTrack.GetTotalEnergy() +
248 theTarget.AtomicMass(AT, ZT) + theTarget.G 239 theTarget.AtomicMass(AT, ZT) + theTarget.GetEnergyDeposit();
249 G4double TotalEPost = 0.0; 240 G4double TotalEPost = 0.0;
250 // 241 //
251 // 242 //
252 // Determine the radii of the projectile and t 243 // Determine the radii of the projectile and target nuclei.
253 // 244 //
254 G4WilsonRadius aR; 245 G4WilsonRadius aR;
255 G4double rP = aR.GetWilsonRadius(AP); 246 G4double rP = aR.GetWilsonRadius(AP);
256 G4double rT = aR.GetWilsonRadius(AT); 247 G4double rT = aR.GetWilsonRadius(AT);
257 G4double rPsq = rP * rP; 248 G4double rPsq = rP * rP;
258 G4double rTsq = rT * rT; 249 G4double rTsq = rT * rT;
259 if (verboseLevel >= 2) 250 if (verboseLevel >= 2)
260 { 251 {
261 G4cout <<"################################ 252 G4cout <<"########################################"
262 <<"################################ 253 <<"########################################"
263 <<G4endl; 254 <<G4endl;
264 G4cout.precision(6); 255 G4cout.precision(6);
265 G4cout <<"IN G4WilsonAbrasionModel" <<G4en 256 G4cout <<"IN G4WilsonAbrasionModel" <<G4endl;
266 G4cout <<"Initial projectile A=" <<AP 257 G4cout <<"Initial projectile A=" <<AP
267 <<", Z=" <<ZP 258 <<", Z=" <<ZP
268 <<", radius = " <<rP/fermi <<" fm" 259 <<", radius = " <<rP/fermi <<" fm"
269 <<G4endl; 260 <<G4endl;
270 G4cout <<"Initial target A=" <<AT 261 G4cout <<"Initial target A=" <<AT
271 <<", Z=" <<ZT 262 <<", Z=" <<ZT
272 <<", radius = " <<rT/fermi <<" fm" 263 <<", radius = " <<rT/fermi <<" fm"
273 <<G4endl; 264 <<G4endl;
274 G4cout <<"Projectile momentum and Energy/n 265 G4cout <<"Projectile momentum and Energy/nuc = " <<pP <<" ," <<E <<G4endl;
275 } 266 }
276 // 267 //
277 // 268 //
278 // The following variables are used to determi 269 // The following variables are used to determine the impact parameter in the
279 // near-field (i.e. taking into consideration 270 // near-field (i.e. taking into consideration the electrostatic repulsion).
280 // 271 //
281 G4double rm = ZP * ZT * elm_coupling / (E 272 G4double rm = ZP * ZT * elm_coupling / (E * AP);
282 G4double r = 0.0; 273 G4double r = 0.0;
283 G4double rsq = 0.0; 274 G4double rsq = 0.0;
284 // 275 //
285 // 276 //
286 // Initialise some of the variables which wll 277 // Initialise some of the variables which wll be used to calculate the chord-
287 // length for nucleons in the projectile and t 278 // length for nucleons in the projectile and target, and hence calculate the
288 // number of abraded nucleons and the excitati 279 // number of abraded nucleons and the excitation energy.
289 // 280 //
290 G4NuclearAbrasionGeometry *theAbrasionGeomet 281 G4NuclearAbrasionGeometry *theAbrasionGeometry = nullptr;
291 G4double CT = 0.0; 282 G4double CT = 0.0;
292 G4double F = 0.0; 283 G4double F = 0.0;
293 G4int Dabr = 0; 284 G4int Dabr = 0;
294 // 285 //
295 // 286 //
296 // The following loop is performed until the n 287 // The following loop is performed until the number of nucleons which are
297 // abraded by the process is >1, i.e. an inter 288 // abraded by the process is >1, i.e. an interaction MUST occur.
298 // 289 //
299 G4bool skipInteraction = false; // It will 290 G4bool skipInteraction = false; // It will be set true if the two nuclei fail to collide
300 const G4int maxNumberOfLoops = 1000; 291 const G4int maxNumberOfLoops = 1000;
301 G4int loopCounter = -1; 292 G4int loopCounter = -1;
302 while (Dabr == 0 && ++loopCounter < maxNumbe 293 while (Dabr == 0 && ++loopCounter < maxNumberOfLoops) /* Loop checking, 07.08.2015, A.Ribon */
303 { 294 {
304 // 295 //
305 // 296 //
306 // Sample the impact parameter. For the momen 297 // Sample the impact parameter. For the moment, this class takes account of
307 // electrostatic effects on the impact paramet 298 // electrostatic effects on the impact parameter, but (like HZETRN AND NUCFRG2)
308 // does not make any correction for the effect 299 // does not make any correction for the effects of nuclear-nuclear repulsion.
309 // 300 //
310 G4double rPT = rP + rT; 301 G4double rPT = rP + rT;
311 G4double rPTsq = rPT * rPT; 302 G4double rPTsq = rPT * rPT;
312 // 303 //
313 // 304 //
314 // This is a "catch" to make sure we don't go 305 // This is a "catch" to make sure we don't go into an infinite loop because the
315 // energy is too low to overcome nuclear repul 306 // energy is too low to overcome nuclear repulsion. PRT 20091023. If the
316 // value of rm < fradius * rPT then we're unli 307 // value of rm < fradius * rPT then we're unlikely to sample a small enough
317 // impact parameter (energy of incident partic 308 // impact parameter (energy of incident particle is too low).
318 // 309 //
319 if (rm >= fradius * rPT) { 310 if (rm >= fradius * rPT) {
320 skipInteraction = true; 311 skipInteraction = true;
321 } 312 }
322 // 313 //
323 // 314 //
324 // Now sample impact parameter until the crite 315 // Now sample impact parameter until the criterion is met that projectile
325 // and target overlap, but repulsion is taken 316 // and target overlap, but repulsion is taken into consideration.
326 // 317 //
327 G4int evtcnt = 0; 318 G4int evtcnt = 0;
328 r = 1.1 * rPT; 319 r = 1.1 * rPT;
329 while (r > rPT && ++evtcnt < 1000) /* Loo 320 while (r > rPT && ++evtcnt < 1000) /* Loop checking, 07.08.2015, A.Ribon */
330 { 321 {
331 G4double bsq = rPTsq * G4UniformRand(); 322 G4double bsq = rPTsq * G4UniformRand();
332 r = (rm + std::sqrt(rm*rm + 4 323 r = (rm + std::sqrt(rm*rm + 4.0*bsq)) / 2.0;
333 } 324 }
334 // 325 //
335 // 326 //
336 // We've tried to sample this 1000 times, but 327 // We've tried to sample this 1000 times, but failed.
337 // 328 //
338 if (evtcnt >= 1000) { 329 if (evtcnt >= 1000) {
339 skipInteraction = true; 330 skipInteraction = true;
340 } 331 }
341 332
342 rsq = r * r; 333 rsq = r * r;
343 // 334 //
344 // 335 //
345 // Now determine the chord-length through the 336 // Now determine the chord-length through the target nucleus.
346 // 337 //
347 if (rT > rP) 338 if (rT > rP)
348 { 339 {
349 G4double x = (rPsq + rsq - rTsq) / 2.0 / 340 G4double x = (rPsq + rsq - rTsq) / 2.0 / r;
350 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - 341 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - x*x);
351 else CT = 2.0 * std::sqrt(rTsq - 342 else CT = 2.0 * std::sqrt(rTsq - rsq);
352 } 343 }
353 else 344 else
354 { 345 {
355 G4double x = (rTsq + rsq - rPsq) / 2.0 / 346 G4double x = (rTsq + rsq - rPsq) / 2.0 / r;
356 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - 347 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - x*x);
357 else CT = 2.0 * rT; 348 else CT = 2.0 * rT;
358 } 349 }
359 // 350 //
360 // 351 //
361 // Determine the number of abraded nucleons. 352 // Determine the number of abraded nucleons. Note that the mean number of
362 // abraded nucleons is used to sample the Pois 353 // abraded nucleons is used to sample the Poisson distribution. The Poisson
363 // distribution is sampled only ten times with 354 // distribution is sampled only ten times with the current impact parameter,
364 // and if it fails after this to find a case f 355 // and if it fails after this to find a case for which the number of abraded
365 // nucleons >1, the impact parameter is re-sam 356 // nucleons >1, the impact parameter is re-sampled.
366 // 357 //
367 delete theAbrasionGeometry; 358 delete theAbrasionGeometry;
368 theAbrasionGeometry = new G4NuclearAbrasio 359 theAbrasionGeometry = new G4NuclearAbrasionGeometry(AP,AT,r);
369 F = theAbrasionGeometry- 360 F = theAbrasionGeometry->F();
370 G4double lambda = 16.6*fermi / G4Pow:: 361 G4double lambda = 16.6*fermi / G4Pow::GetInstance()->powA(E/MeV,0.26);
371 G4double Mabr = F * AP * (1.0 - G4Ex 362 G4double Mabr = F * AP * (1.0 - G4Exp(-CT/lambda));
372 G4long n = 0; 363 G4long n = 0;
373 for (G4int i = 0; i<10; ++i) 364 for (G4int i = 0; i<10; ++i)
374 { 365 {
375 n = G4Poisson(Mabr); 366 n = G4Poisson(Mabr);
376 if (n > 0) 367 if (n > 0)
377 { 368 {
378 if (n>AP) Dabr = (G4int) AP; 369 if (n>AP) Dabr = (G4int) AP;
379 else Dabr = (G4int) n; 370 else Dabr = (G4int) n;
380 break; 371 break;
381 } 372 }
382 } 373 }
383 } // End of while loop 374 } // End of while loop
384 375
385 if ( loopCounter >= maxNumberOfLoops || skip 376 if ( loopCounter >= maxNumberOfLoops || skipInteraction ) {
386 // Assume nuclei do not collide and return 377 // Assume nuclei do not collide and return unchanged primary.
387 theParticleChange.SetStatusChange(isAlive) 378 theParticleChange.SetStatusChange(isAlive);
388 theParticleChange.SetEnergyChange(theTrack 379 theParticleChange.SetEnergyChange(theTrack.GetKineticEnergy());
389 theParticleChange.SetMomentumChange(theTra 380 theParticleChange.SetMomentumChange(theTrack.Get4Momentum().vect().unit());
390 if (verboseLevel >= 2) { 381 if (verboseLevel >= 2) {
391 G4cout <<"Particle energy too low to ove 382 G4cout <<"Particle energy too low to overcome repulsion." <<G4endl;
392 G4cout <<"Event rejected and original tr 383 G4cout <<"Event rejected and original track maintained" <<G4endl;
393 G4cout <<"############################## 384 G4cout <<"########################################"
394 <<"############################## 385 <<"########################################"
395 <<G4endl; 386 <<G4endl;
396 } 387 }
397 delete theAbrasionGeometry; 388 delete theAbrasionGeometry;
398 return &theParticleChange; 389 return &theParticleChange;
399 } 390 }
400 391
401 if (verboseLevel >= 2) 392 if (verboseLevel >= 2)
402 { 393 {
403 G4cout <<G4endl; 394 G4cout <<G4endl;
404 G4cout <<"Impact parameter = " <<r/ferm 395 G4cout <<"Impact parameter = " <<r/fermi <<" fm" <<G4endl;
405 G4cout <<"# Abraded nucleons = " <<Dabr < 396 G4cout <<"# Abraded nucleons = " <<Dabr <<G4endl;
406 } 397 }
407 // 398 //
408 // 399 //
409 // The number of abraded nucleons must be no g 400 // The number of abraded nucleons must be no greater than the number of
410 // nucleons in either the projectile or the ta 401 // nucleons in either the projectile or the target. If AP - Dabr < 2 or
411 // AT - Dabr < 2 then either we have only a nu 402 // AT - Dabr < 2 then either we have only a nucleon left behind in the
412 // projectile/target or we've tried to abrade 403 // projectile/target or we've tried to abrade too many nucleons - and Dabr
413 // should be limited. 404 // should be limited.
414 // 405 //
415 if (AP - (G4double) Dabr < 2.0) Dabr = (G4in 406 if (AP - (G4double) Dabr < 2.0) Dabr = (G4int) AP;
416 if (AT - (G4double) Dabr < 2.0) Dabr = (G4in 407 if (AT - (G4double) Dabr < 2.0) Dabr = (G4int) AT;
417 // 408 //
418 // 409 //
419 // Determine the abraded secondary nucleons fr 410 // Determine the abraded secondary nucleons from the projectile. *fragmentP
420 // is a pointer to the prefragment from the pr 411 // is a pointer to the prefragment from the projectile and nSecP is the number
421 // of nucleons in theParticleChange which have 412 // of nucleons in theParticleChange which have been abraded. The total energy
422 // from these is determined. 413 // from these is determined.
423 // 414 //
424 G4ThreeVector boost = pP.findBoostToCM(); 415 G4ThreeVector boost = pP.findBoostToCM();
425 G4Fragment *fragmentP = GetAbradedNucleons ( 416 G4Fragment *fragmentP = GetAbradedNucleons (Dabr, AP, ZP, rP);
426 G4int nSecP = (G4int)theParticleCh << 417 G4int nSecP = theParticleChange.GetNumberOfSecondaries();
427 G4int i = 0; 418 G4int i = 0;
428 for (i=0; i<nSecP; ++i) 419 for (i=0; i<nSecP; ++i)
429 { 420 {
430 TotalEPost += theParticleChange.GetSeconda 421 TotalEPost += theParticleChange.GetSecondary(i)->
431 GetParticle()->GetTotalEnergy(); 422 GetParticle()->GetTotalEnergy();
432 } 423 }
433 // 424 //
434 // 425 //
435 // Determine the number of spectators in the i 426 // Determine the number of spectators in the interaction region for the
436 // projectile. 427 // projectile.
437 // 428 //
438 G4int DspcP = (G4int) (AP*F) - Dabr; 429 G4int DspcP = (G4int) (AP*F) - Dabr;
439 if (DspcP <= 0) DspcP = 0; 430 if (DspcP <= 0) DspcP = 0;
440 else if (DspcP > AP-Dabr) DspcP = ((G4int) A 431 else if (DspcP > AP-Dabr) DspcP = ((G4int) AP) - Dabr;
441 // 432 //
442 // 433 //
443 // Determine excitation energy associated with 434 // Determine excitation energy associated with excess surface area of the
444 // projectile (EsP) and the excitation due to 435 // projectile (EsP) and the excitation due to scattering of nucleons which are
445 // retained within the projectile (ExP). Add 436 // retained within the projectile (ExP). Add the total energy from the excited
446 // nucleus to the total energy of the secondar 437 // nucleus to the total energy of the secondaries.
447 // 438 //
448 G4bool excitationAbsorbedByProjectile = fals 439 G4bool excitationAbsorbedByProjectile = false;
449 if (fragmentP != nullptr) 440 if (fragmentP != nullptr)
450 { 441 {
451 G4double EsP = theAbrasionGeometry->GetExc 442 G4double EsP = theAbrasionGeometry->GetExcitationEnergyOfProjectile();
452 G4double ExP = 0.0; 443 G4double ExP = 0.0;
453 if (Dabr < AT) 444 if (Dabr < AT)
454 excitationAbsorbedByProjectile = G4Unifo 445 excitationAbsorbedByProjectile = G4UniformRand() < 0.5;
455 if (excitationAbsorbedByProjectile) 446 if (excitationAbsorbedByProjectile)
456 ExP = GetNucleonInducedExcitation(rP, rT 447 ExP = GetNucleonInducedExcitation(rP, rT, r);
457 G4double xP = EsP + ExP; 448 G4double xP = EsP + ExP;
458 if (xP > B*(AP-Dabr)) xP = B*(AP-Dabr); 449 if (xP > B*(AP-Dabr)) xP = B*(AP-Dabr);
459 G4LorentzVector lorentzVector = fragmentP- 450 G4LorentzVector lorentzVector = fragmentP->GetMomentum();
460 lorentzVector.setE(lorentzVector.e()+xP); 451 lorentzVector.setE(lorentzVector.e()+xP);
461 fragmentP->SetMomentum(lorentzVector); 452 fragmentP->SetMomentum(lorentzVector);
462 TotalEPost += lorentzVector.e(); 453 TotalEPost += lorentzVector.e();
463 } 454 }
464 G4double EMassP = TotalEPost; 455 G4double EMassP = TotalEPost;
465 // 456 //
466 // 457 //
467 // Determine the abraded secondary nucleons fr 458 // Determine the abraded secondary nucleons from the target. Note that it's
468 // assumed that the same number of nucleons ar 459 // assumed that the same number of nucleons are abraded from the target as for
469 // the projectile, and obviously no boost is a 460 // the projectile, and obviously no boost is applied to the products. *fragmentT
470 // is a pointer to the prefragment from the ta 461 // is a pointer to the prefragment from the target and nSec is the total number
471 // of nucleons in theParticleChange which have 462 // of nucleons in theParticleChange which have been abraded. The total energy
472 // from these is determined. 463 // from these is determined.
473 // 464 //
474 G4Fragment *fragmentT = GetAbradedNucleons ( 465 G4Fragment *fragmentT = GetAbradedNucleons (Dabr, AT, ZT, rT);
475 G4int nSec = (G4int)theParticleChange.GetNum << 466 G4int nSec = theParticleChange.GetNumberOfSecondaries();
476 for (i=nSecP; i<nSec; ++i) 467 for (i=nSecP; i<nSec; ++i)
477 { 468 {
478 TotalEPost += theParticleChange.GetSeconda 469 TotalEPost += theParticleChange.GetSecondary(i)->
479 GetParticle()->GetTotalEnergy(); 470 GetParticle()->GetTotalEnergy();
480 } 471 }
481 // 472 //
482 // 473 //
483 // Determine the number of spectators in the i 474 // Determine the number of spectators in the interaction region for the
484 // target. 475 // target.
485 // 476 //
486 G4int DspcT = (G4int) (AT*F) - Dabr; 477 G4int DspcT = (G4int) (AT*F) - Dabr;
487 if (DspcT <= 0) DspcT = 0; 478 if (DspcT <= 0) DspcT = 0;
488 else if (DspcT > AP-Dabr) DspcT = ((G4int) A 479 else if (DspcT > AP-Dabr) DspcT = ((G4int) AT) - Dabr;
489 // 480 //
490 // 481 //
491 // Determine excitation energy associated with 482 // Determine excitation energy associated with excess surface area of the
492 // target (EsT) and the excitation due to scat 483 // target (EsT) and the excitation due to scattering of nucleons which are
493 // retained within the target (ExT). Add the 484 // retained within the target (ExT). Add the total energy from the excited
494 // nucleus to the total energy of the secondar 485 // nucleus to the total energy of the secondaries.
495 // 486 //
496 if (fragmentT != nullptr) 487 if (fragmentT != nullptr)
497 { 488 {
498 G4double EsT = theAbrasionGeometry->GetExc 489 G4double EsT = theAbrasionGeometry->GetExcitationEnergyOfTarget();
499 G4double ExT = 0.0; 490 G4double ExT = 0.0;
500 if (!excitationAbsorbedByProjectile) 491 if (!excitationAbsorbedByProjectile)
501 ExT = GetNucleonInducedExcitation(rT, rP 492 ExT = GetNucleonInducedExcitation(rT, rP, r);
502 G4double xT = EsT + ExT; 493 G4double xT = EsT + ExT;
503 if (xT > B*(AT-Dabr)) xT = B*(AT-Dabr); 494 if (xT > B*(AT-Dabr)) xT = B*(AT-Dabr);
504 G4LorentzVector lorentzVector = fragmentT- 495 G4LorentzVector lorentzVector = fragmentT->GetMomentum();
505 lorentzVector.setE(lorentzVector.e()+xT); 496 lorentzVector.setE(lorentzVector.e()+xT);
506 fragmentT->SetMomentum(lorentzVector); 497 fragmentT->SetMomentum(lorentzVector);
507 TotalEPost += lorentzVector.e(); 498 TotalEPost += lorentzVector.e();
508 } 499 }
509 // 500 //
510 // 501 //
511 // Now determine the difference between the pr 502 // Now determine the difference between the pre and post interaction
512 // energy - this will be used to determine the 503 // energy - this will be used to determine the Lorentz boost if conservation
513 // of energy is to be imposed/attempted. 504 // of energy is to be imposed/attempted.
514 // 505 //
515 G4double deltaE = TotalEPre - TotalEPost; 506 G4double deltaE = TotalEPre - TotalEPost;
516 if (deltaE > 0.0 && conserveEnergy) 507 if (deltaE > 0.0 && conserveEnergy)
517 { 508 {
518 G4double beta = std::sqrt(1.0 - EMassP*EMa 509 G4double beta = std::sqrt(1.0 - EMassP*EMassP/G4Pow::GetInstance()->powN(deltaE+EMassP,2));
519 boost = boost / boost.mag() * beta; 510 boost = boost / boost.mag() * beta;
520 } 511 }
521 // 512 //
522 // 513 //
523 // Now boost the secondaries from the projecti 514 // Now boost the secondaries from the projectile.
524 // 515 //
525 G4ThreeVector pBalance = pP.vect(); 516 G4ThreeVector pBalance = pP.vect();
526 for (i=0; i<nSecP; ++i) 517 for (i=0; i<nSecP; ++i)
527 { 518 {
528 G4DynamicParticle *dynamicP = theParticleC 519 G4DynamicParticle *dynamicP = theParticleChange.GetSecondary(i)->
529 GetParticle(); 520 GetParticle();
530 G4LorentzVector lorentzVector = dynamicP-> 521 G4LorentzVector lorentzVector = dynamicP->Get4Momentum();
531 lorentzVector.boost(-boost); 522 lorentzVector.boost(-boost);
532 dynamicP->Set4Momentum(lorentzVector); 523 dynamicP->Set4Momentum(lorentzVector);
533 pBalance -= lorentzVector.vect(); 524 pBalance -= lorentzVector.vect();
534 } 525 }
535 // 526 //
536 // 527 //
537 // Set the boost for the projectile prefragmen 528 // Set the boost for the projectile prefragment. This is now based on the
538 // conservation of momentum. However, if the 529 // conservation of momentum. However, if the user selected momentum of the
539 // prefragment is not to be conserved this sim 530 // prefragment is not to be conserved this simply boosted to the velocity of the
540 // original projectile times the ratio of the 531 // original projectile times the ratio of the unexcited to the excited mass
541 // of the prefragment (the excitation increase 532 // of the prefragment (the excitation increases the effective mass of the
542 // prefragment, and therefore modifying the bo 533 // prefragment, and therefore modifying the boost is an attempt to prevent
543 // the momentum of the prefragment being exces 534 // the momentum of the prefragment being excessive).
544 // 535 //
545 if (fragmentP != nullptr) 536 if (fragmentP != nullptr)
546 { 537 {
547 G4LorentzVector lorentzVector = fragmentP- 538 G4LorentzVector lorentzVector = fragmentP->GetMomentum();
548 G4double fragmentM = lorentzVec 539 G4double fragmentM = lorentzVector.m();
549 if (conserveMomentum) 540 if (conserveMomentum)
550 fragmentP->SetMomentum 541 fragmentP->SetMomentum
551 (G4LorentzVector(pBalance,std::sqrt(pB 542 (G4LorentzVector(pBalance,std::sqrt(pBalance.mag2()+fragmentM*fragmentM+1.0*eV*eV)));
552 else 543 else
553 { 544 {
554 G4double fragmentGroundStateM = fragment 545 G4double fragmentGroundStateM = fragmentP->GetGroundStateMass();
555 fragmentP->SetMomentum(lorentzVector.boo 546 fragmentP->SetMomentum(lorentzVector.boost(-boost * fragmentGroundStateM/fragmentM));
556 } 547 }
557 } 548 }
558 // 549 //
559 // 550 //
560 // Output information to user if verbose infor 551 // Output information to user if verbose information requested.
561 // 552 //
562 if (verboseLevel >= 2) 553 if (verboseLevel >= 2)
563 { 554 {
564 G4cout <<G4endl; 555 G4cout <<G4endl;
565 G4cout <<"-------------------------------- 556 G4cout <<"-----------------------------------" <<G4endl;
566 G4cout <<"Secondary nucleons from projecti 557 G4cout <<"Secondary nucleons from projectile:" <<G4endl;
567 G4cout <<"-------------------------------- 558 G4cout <<"-----------------------------------" <<G4endl;
568 G4cout.precision(7); 559 G4cout.precision(7);
569 for (i=0; i<nSecP; ++i) 560 for (i=0; i<nSecP; ++i)
570 { 561 {
571 G4cout <<"Particle # " <<i <<G4endl; 562 G4cout <<"Particle # " <<i <<G4endl;
572 theParticleChange.GetSecondary(i)->GetPa 563 theParticleChange.GetSecondary(i)->GetParticle()->DumpInfo();
573 G4DynamicParticle *dyn = theParticleChan 564 G4DynamicParticle *dyn = theParticleChange.GetSecondary(i)->GetParticle();
574 G4cout <<"New nucleon (P) " <<dyn->GetDe 565 G4cout <<"New nucleon (P) " <<dyn->GetDefinition()->GetParticleName()
575 <<" : " <<dyn->Get4M 566 <<" : " <<dyn->Get4Momentum()
576 <<G4endl; 567 <<G4endl;
577 } 568 }
578 G4cout <<"---------------------------" <<G 569 G4cout <<"---------------------------" <<G4endl;
579 G4cout <<"The projectile prefragment:" <<G 570 G4cout <<"The projectile prefragment:" <<G4endl;
580 G4cout <<"---------------------------" <<G 571 G4cout <<"---------------------------" <<G4endl;
581 if (fragmentP != nullptr) 572 if (fragmentP != nullptr)
582 G4cout <<*fragmentP <<G4endl; 573 G4cout <<*fragmentP <<G4endl;
583 else 574 else
584 G4cout <<"(No residual prefragment)" <<G 575 G4cout <<"(No residual prefragment)" <<G4endl;
585 G4cout <<G4endl; 576 G4cout <<G4endl;
586 G4cout <<"-------------------------------" 577 G4cout <<"-------------------------------" <<G4endl;
587 G4cout <<"Secondary nucleons from target:" 578 G4cout <<"Secondary nucleons from target:" <<G4endl;
588 G4cout <<"-------------------------------" 579 G4cout <<"-------------------------------" <<G4endl;
589 G4cout.precision(7); 580 G4cout.precision(7);
590 for (i=nSecP; i<nSec; ++i) 581 for (i=nSecP; i<nSec; ++i)
591 { 582 {
592 G4cout <<"Particle # " <<i <<G4endl; 583 G4cout <<"Particle # " <<i <<G4endl;
593 theParticleChange.GetSecondary(i)->GetPa 584 theParticleChange.GetSecondary(i)->GetParticle()->DumpInfo();
594 G4DynamicParticle *dyn = theParticleChan 585 G4DynamicParticle *dyn = theParticleChange.GetSecondary(i)->GetParticle();
595 G4cout <<"New nucleon (T) " <<dyn->GetDe 586 G4cout <<"New nucleon (T) " <<dyn->GetDefinition()->GetParticleName()
596 <<" : " <<dyn->Get4M 587 <<" : " <<dyn->Get4Momentum()
597 <<G4endl; 588 <<G4endl;
598 } 589 }
599 G4cout <<"-----------------------" <<G4end 590 G4cout <<"-----------------------" <<G4endl;
600 G4cout <<"The target prefragment:" <<G4end 591 G4cout <<"The target prefragment:" <<G4endl;
601 G4cout <<"-----------------------" <<G4end 592 G4cout <<"-----------------------" <<G4endl;
602 if (fragmentT != nullptr) 593 if (fragmentT != nullptr)
603 G4cout <<*fragmentT <<G4endl; 594 G4cout <<*fragmentT <<G4endl;
604 else 595 else
605 G4cout <<"(No residual prefragment)" <<G 596 G4cout <<"(No residual prefragment)" <<G4endl;
606 } 597 }
607 // 598 //
608 // 599 //
609 // Now we can decay the nuclear fragments if p 600 // Now we can decay the nuclear fragments if present. The secondaries are
610 // collected and boosted as well. This is per 601 // collected and boosted as well. This is performed first for the projectile...
611 // 602 //
612 if (fragmentP !=nullptr) 603 if (fragmentP !=nullptr)
613 { 604 {
614 G4ReactionProductVector *products = nullpt 605 G4ReactionProductVector *products = nullptr;
615 // if (fragmentP->GetZ_asInt() != fragm 606 // if (fragmentP->GetZ_asInt() != fragmentP->GetA_asInt())
616 products = theExcitationHandler->BreakItUp 607 products = theExcitationHandler->BreakItUp(*fragmentP);
617 // else 608 // else
618 // products = theExcitationHandlerx->Bre 609 // products = theExcitationHandlerx->BreakItUp(*fragmentP);
619 delete fragmentP; 610 delete fragmentP;
620 fragmentP = nullptr; 611 fragmentP = nullptr;
621 612
622 G4ReactionProductVector::iterator iter; 613 G4ReactionProductVector::iterator iter;
623 for (iter = products->begin(); iter != pro 614 for (iter = products->begin(); iter != products->end(); ++iter)
624 { 615 {
625 G4DynamicParticle *secondary = 616 G4DynamicParticle *secondary =
626 new G4DynamicParticle((*iter)->GetDefi 617 new G4DynamicParticle((*iter)->GetDefinition(),
627 (*iter)->GetTotalEnergy(), (*iter)->Ge 618 (*iter)->GetTotalEnergy(), (*iter)->GetMomentum());
628 theParticleChange.AddSecondary (secondar << 619 theParticleChange.AddSecondary (secondary); // Added MHM 20050118
629 G4String particleName = (*iter)->GetDefi 620 G4String particleName = (*iter)->GetDefinition()->GetParticleName();
630 delete (*iter); // get rid of leftover p << 621 delete (*iter); // get rid of leftover particle def! // Added MHM 20050118
631 if (verboseLevel >= 2 && particleName.fi 622 if (verboseLevel >= 2 && particleName.find("[",0) < particleName.size())
632 { 623 {
633 G4cout <<"------------------------" << 624 G4cout <<"------------------------" <<G4endl;
634 G4cout <<"The projectile fragment:" << 625 G4cout <<"The projectile fragment:" <<G4endl;
635 G4cout <<"------------------------" << 626 G4cout <<"------------------------" <<G4endl;
636 G4cout <<" fragmentP = " <<particleNam 627 G4cout <<" fragmentP = " <<particleName
637 <<" Energy = " <<secondary-> 628 <<" Energy = " <<secondary->GetKineticEnergy()
638 <<G4endl; 629 <<G4endl;
639 } 630 }
640 } 631 }
641 delete products; << 632 delete products; // Added MHM 20050118
642 } 633 }
643 // 634 //
644 // 635 //
645 // Now decay the target nucleus - no boost is 636 // Now decay the target nucleus - no boost is applied since in this
646 // approximation it is assumed that there is n 637 // approximation it is assumed that there is negligible momentum transfer from
647 // the projectile. 638 // the projectile.
648 // 639 //
649 if (fragmentT != nullptr) 640 if (fragmentT != nullptr)
650 { 641 {
651 G4ReactionProductVector *products = nullpt 642 G4ReactionProductVector *products = nullptr;
652 // if (fragmentT->GetZ_asInt() != fragm 643 // if (fragmentT->GetZ_asInt() != fragmentT->GetA_asInt())
653 products = theExcitationHandler->BreakIt 644 products = theExcitationHandler->BreakItUp(*fragmentT);
654 // else 645 // else
655 // products = theExcitationHandlerx->Bre 646 // products = theExcitationHandlerx->BreakItUp(*fragmentT);
656 // delete fragmentT; 647 // delete fragmentT;
657 fragmentT = nullptr; 648 fragmentT = nullptr;
658 649
659 G4ReactionProductVector::iterator iter; 650 G4ReactionProductVector::iterator iter;
660 for (iter = products->begin(); iter != pro 651 for (iter = products->begin(); iter != products->end(); ++iter)
661 { 652 {
662 G4DynamicParticle *secondary = 653 G4DynamicParticle *secondary =
663 new G4DynamicParticle((*iter)->GetDefi 654 new G4DynamicParticle((*iter)->GetDefinition(),
664 (*iter)->GetTotalEnergy(), (*iter)->Ge 655 (*iter)->GetTotalEnergy(), (*iter)->GetMomentum());
665 theParticleChange.AddSecondary (secondar << 656 theParticleChange.AddSecondary (secondary);
666 G4String particleName = (*iter)->GetDefi 657 G4String particleName = (*iter)->GetDefinition()->GetParticleName();
667 delete (*iter); // get rid of leftover p << 658 delete (*iter); // get rid of leftover particle def! // Added MHM 20050118
668 if (verboseLevel >= 2 && particleName.fi 659 if (verboseLevel >= 2 && particleName.find("[",0) < particleName.size())
669 { 660 {
670 G4cout <<"--------------------" <<G4en 661 G4cout <<"--------------------" <<G4endl;
671 G4cout <<"The target fragment:" <<G4en 662 G4cout <<"The target fragment:" <<G4endl;
672 G4cout <<"--------------------" <<G4en 663 G4cout <<"--------------------" <<G4endl;
673 G4cout <<" fragmentT = " <<particleNam 664 G4cout <<" fragmentT = " <<particleName
674 <<" Energy = " <<secondary-> 665 <<" Energy = " <<secondary->GetKineticEnergy()
675 <<G4endl; 666 <<G4endl;
676 } 667 }
677 } 668 }
678 delete products; << 669 delete products; // Added MHM 20050118
679 } 670 }
680 671
681 if (verboseLevel >= 2) 672 if (verboseLevel >= 2)
682 G4cout <<"############################### 673 G4cout <<"########################################"
683 <<"############################### 674 <<"########################################"
684 <<G4endl; 675 <<G4endl;
685 676
686 delete theAbrasionGeometry; 677 delete theAbrasionGeometry;
687 return &theParticleChange; 678 return &theParticleChange;
688 } 679 }
689 ////////////////////////////////////////////// 680 ////////////////////////////////////////////////////////////////////////////////
690 // 681 //
691 G4Fragment *G4WilsonAbrasionModel::GetAbradedN 682 G4Fragment *G4WilsonAbrasionModel::GetAbradedNucleons (G4int Dabr, G4double A,
692 G4double Z, G4double r) 683 G4double Z, G4double r)
693 { 684 {
694 // 685 //
695 // 686 //
696 // Initialise variables. tau is the Fermi rad 687 // Initialise variables. tau is the Fermi radius of the nucleus. The variables
697 // p..., C... and gamma are used to help sampl 688 // p..., C... and gamma are used to help sample the secondary nucleon
698 // spectrum. 689 // spectrum.
699 // 690 //
700 691
701 G4double pK = hbarc * G4Pow::GetInstance() 692 G4double pK = hbarc * G4Pow::GetInstance()->A13(9.0 * pi / 4.0 * A) / (1.29 * r);
702 if (A <= 24.0) pK *= -0.229*G4Pow::GetInstan 693 if (A <= 24.0) pK *= -0.229*G4Pow::GetInstance()->A13(A) + 1.62;
703 G4double pKsq = pK * pK; 694 G4double pKsq = pK * pK;
704 G4double p1sq = 2.0/5.0 * pKsq; 695 G4double p1sq = 2.0/5.0 * pKsq;
705 G4double p2sq = 6.0/5.0 * pKsq; 696 G4double p2sq = 6.0/5.0 * pKsq;
706 G4double p3sq = 500.0 * 500.0; 697 G4double p3sq = 500.0 * 500.0;
707 G4double C1 = 1.0; 698 G4double C1 = 1.0;
708 G4double C2 = 0.03; 699 G4double C2 = 0.03;
709 G4double C3 = 0.0002; 700 G4double C3 = 0.0002;
710 G4double gamma = 90.0 * MeV; 701 G4double gamma = 90.0 * MeV;
711 G4double maxn = C1 + C2 + C3; 702 G4double maxn = C1 + C2 + C3;
712 // 703 //
713 // 704 //
714 // initialise the number of secondary nucleons 705 // initialise the number of secondary nucleons abraded to zero, and initially set
715 // the type of nucleon abraded to proton ... j 706 // the type of nucleon abraded to proton ... just for now.
716 // 707 //
717 G4double Aabr = 0.0; 708 G4double Aabr = 0.0;
718 G4double Zabr = 0.0; 709 G4double Zabr = 0.0;
719 G4ParticleDefinition *typeNucleon = G4Proton 710 G4ParticleDefinition *typeNucleon = G4Proton::ProtonDefinition();
720 G4DynamicParticle *dynamicNucleon = nullptr; 711 G4DynamicParticle *dynamicNucleon = nullptr;
721 G4ParticleMomentum pabr(0.0, 0.0, 0.0); 712 G4ParticleMomentum pabr(0.0, 0.0, 0.0);
722 // 713 //
723 // 714 //
724 // Now go through each abraded nucleon and sam 715 // Now go through each abraded nucleon and sample type, spectrum and angle.
725 // 716 //
726 G4bool isForLoopExitAnticipated = false; 717 G4bool isForLoopExitAnticipated = false;
727 for (G4int i=0; i<Dabr; ++i) 718 for (G4int i=0; i<Dabr; ++i)
728 { 719 {
729 // 720 //
730 // 721 //
731 // Sample the nucleon momentum distribution by 722 // Sample the nucleon momentum distribution by simple rejection techniques. We
732 // reject values of p == 0.0 since this causes 723 // reject values of p == 0.0 since this causes bad behaviour in the sinh term.
733 // 724 //
734 G4double p = 0.0; 725 G4double p = 0.0;
735 G4bool found = false; 726 G4bool found = false;
736 const G4int maxNumberOfLoops = 100000; 727 const G4int maxNumberOfLoops = 100000;
737 G4int loopCounter = -1; 728 G4int loopCounter = -1;
738 while (!found && ++loopCounter < maxNumber 729 while (!found && ++loopCounter < maxNumberOfLoops) /* Loop checking, 07.08.2015, A.Ribon */
739 { 730 {
740 while (p <= 0.0) p = npK * pK * G4Unifor 731 while (p <= 0.0) p = npK * pK * G4UniformRand(); /* Loop checking, 07.08.2015, A.Ribon */
741 G4double psq = p * p; 732 G4double psq = p * p;
742 found = maxn * G4UniformRand() < C1*G4Ex 733 found = maxn * G4UniformRand() < C1*G4Exp(-psq/p1sq/2.0) +
743 C2*G4Exp(-psq/p2sq/2.0) + C3*G4Exp(-ps 734 C2*G4Exp(-psq/p2sq/2.0) + C3*G4Exp(-psq/p3sq/2.0) + p/gamma/(0.5*(G4Exp(p/gamma)-G4Exp(-p/gamma)));
744 } 735 }
745 if ( loopCounter >= maxNumberOfLoops ) 736 if ( loopCounter >= maxNumberOfLoops )
746 { 737 {
747 isForLoopExitAnticipated = true; 738 isForLoopExitAnticipated = true;
748 break; 739 break;
749 } 740 }
750 // 741 //
751 // 742 //
752 // Determine the type of particle abraded. Ca 743 // Determine the type of particle abraded. Can only be proton or neutron,
753 // and the probability is determine to be prop 744 // and the probability is determine to be proportional to the ratio as found
754 // in the nucleus at each stage. 745 // in the nucleus at each stage.
755 // 746 //
756 G4double prob = (Z-Zabr)/(A-Aabr); 747 G4double prob = (Z-Zabr)/(A-Aabr);
757 if (G4UniformRand()<prob) 748 if (G4UniformRand()<prob)
758 { 749 {
759 Zabr++; 750 Zabr++;
760 typeNucleon = G4Proton::ProtonDefinition 751 typeNucleon = G4Proton::ProtonDefinition();
761 } 752 }
762 else 753 else
763 typeNucleon = G4Neutron::NeutronDefiniti 754 typeNucleon = G4Neutron::NeutronDefinition();
764 Aabr++; 755 Aabr++;
765 // 756 //
766 // 757 //
767 // The angular distribution of the secondary n 758 // The angular distribution of the secondary nucleons is approximated to an
768 // isotropic distribution in the rest frame of 759 // isotropic distribution in the rest frame of the nucleus (this will be Lorentz
769 // boosted later. 760 // boosted later.
770 // 761 //
771 G4double costheta = 2.*G4UniformRand()-1.0 762 G4double costheta = 2.*G4UniformRand()-1.0;
772 G4double sintheta = std::sqrt((1.0 - costh 763 G4double sintheta = std::sqrt((1.0 - costheta)*(1.0 + costheta));
773 G4double phi = 2.0*pi*G4UniformRand() 764 G4double phi = 2.0*pi*G4UniformRand()*rad;
774 G4ThreeVector direction(sintheta*std::cos( 765 G4ThreeVector direction(sintheta*std::cos(phi),sintheta*std::sin(phi),costheta);
775 G4double nucleonMass = typeNucleon->GetPDG 766 G4double nucleonMass = typeNucleon->GetPDGMass();
776 G4double E = std::sqrt(p*p + nuc 767 G4double E = std::sqrt(p*p + nucleonMass*nucleonMass)-nucleonMass;
777 dynamicNucleon = new G4DynamicParticle(typ 768 dynamicNucleon = new G4DynamicParticle(typeNucleon,direction,E);
778 theParticleChange.AddSecondary (dynamicNuc << 769 theParticleChange.AddSecondary (dynamicNucleon);
779 pabr += p*direction; 770 pabr += p*direction;
780 } 771 }
781 // 772 //
782 // 773 //
783 // Next determine the details of the nuclear p 774 // Next determine the details of the nuclear prefragment .. that is if there
784 // is one or more protons in the residue. (No 775 // is one or more protons in the residue. (Note that the 1 eV in the total
785 // energy is a safety factor to avoid any poss 776 // energy is a safety factor to avoid any possibility of negative rest mass
786 // energy.) 777 // energy.)
787 // 778 //
788 G4Fragment *fragment = nullptr; 779 G4Fragment *fragment = nullptr;
789 if ( ! isForLoopExitAnticipated && Z-Zabr>=1 780 if ( ! isForLoopExitAnticipated && Z-Zabr>=1.0 )
790 { 781 {
791 G4double ionMass = G4ParticleTable::GetPar 782 G4double ionMass = G4ParticleTable::GetParticleTable()->GetIonTable()->
792 GetIonMass(G4lrint(Z-Za 783 GetIonMass(G4lrint(Z-Zabr),G4lrint(A-Aabr));
793 G4double E = std::sqrt(pabr.mag2() + 784 G4double E = std::sqrt(pabr.mag2() + ionMass*ionMass);
794 G4LorentzVector lorentzVector = G4LorentzV 785 G4LorentzVector lorentzVector = G4LorentzVector(-pabr, E + 1.0*eV);
795 fragment = 786 fragment =
796 new G4Fragment((G4int) (A-Aabr), (G4int) 787 new G4Fragment((G4int) (A-Aabr), (G4int) (Z-Zabr), lorentzVector);
797 } 788 }
798 789
799 return fragment; 790 return fragment;
800 } 791 }
801 ////////////////////////////////////////////// 792 ////////////////////////////////////////////////////////////////////////////////
802 // 793 //
803 G4double G4WilsonAbrasionModel::GetNucleonIndu 794 G4double G4WilsonAbrasionModel::GetNucleonInducedExcitation
804 (G4double rP, G4double rT, G4double r) 795 (G4double rP, G4double rT, G4double r)
805 { 796 {
806 // 797 //
807 // 798 //
808 // Initialise variables. 799 // Initialise variables.
809 // 800 //
810 G4double Cl = 0.0; 801 G4double Cl = 0.0;
811 G4double rPsq = rP * rP; 802 G4double rPsq = rP * rP;
812 G4double rTsq = rT * rT; 803 G4double rTsq = rT * rT;
813 G4double rsq = r * r; 804 G4double rsq = r * r;
814 // 805 //
815 // 806 //
816 // Depending upon the impact parameter, a diff 807 // Depending upon the impact parameter, a different form of the chord length is
817 // is used. 808 // is used.
818 // 809 //
819 if (r > rT) Cl = 2.0*std::sqrt(rPsq + 2.0*r* 810 if (r > rT) Cl = 2.0*std::sqrt(rPsq + 2.0*r*rT - rsq - rTsq);
820 else Cl = 2.0*rP; 811 else Cl = 2.0*rP;
821 // 812 //
822 // 813 //
823 // The next lines have been changed to include 814 // The next lines have been changed to include a "catch" to make sure if the
824 // projectile and target are too close, Ct is 815 // projectile and target are too close, Ct is set to twice rP or twice rT.
825 // Otherwise the standard Wilson algorithm sho 816 // Otherwise the standard Wilson algorithm should work fine.
826 // PRT 20091023. 817 // PRT 20091023.
827 // 818 //
828 G4double Ct = 0.0; 819 G4double Ct = 0.0;
829 if (rT > rP && rsq < rTsq - rPsq) Ct = 820 if (rT > rP && rsq < rTsq - rPsq) Ct = 2.0 * rP;
830 else if (rP > rT && rsq < rPsq - rTsq) Ct = 821 else if (rP > rT && rsq < rPsq - rTsq) Ct = 2.0 * rT;
831 else { 822 else {
832 G4double bP = (rPsq+rsq-rTsq)/2.0/r; 823 G4double bP = (rPsq+rsq-rTsq)/2.0/r;
833 G4double x = rPsq - bP*bP; 824 G4double x = rPsq - bP*bP;
834 if (x < 0.0) { 825 if (x < 0.0) {
835 G4cerr <<"############################## 826 G4cerr <<"########################################"
836 <<"############################## 827 <<"########################################"
837 <<G4endl; 828 <<G4endl;
838 G4cerr <<"ERROR IN G4WilsonAbrasionModel 829 G4cerr <<"ERROR IN G4WilsonAbrasionModel::GetNucleonInducedExcitation"
839 <<G4endl; 830 <<G4endl;
840 G4cerr <<"rPsq - bP*bP < 0.0 and cannot 831 G4cerr <<"rPsq - bP*bP < 0.0 and cannot be square-rooted" <<G4endl;
841 G4cerr <<"Set to zero instead" <<G4endl; 832 G4cerr <<"Set to zero instead" <<G4endl;
842 G4cerr <<"############################## 833 G4cerr <<"########################################"
843 <<"############################## 834 <<"########################################"
844 <<G4endl; 835 <<G4endl;
845 } 836 }
846 Ct = 2.0*std::sqrt(x); 837 Ct = 2.0*std::sqrt(x);
847 } 838 }
848 839
849 G4double Ex = 13.0 * Cl / fermi; 840 G4double Ex = 13.0 * Cl / fermi;
850 if (Ct > 1.5*fermi) 841 if (Ct > 1.5*fermi)
851 Ex += 13.0 * Cl / fermi /3.0 * (Ct/fermi - 842 Ex += 13.0 * Cl / fermi /3.0 * (Ct/fermi - 1.5);
852 843
853 return Ex; 844 return Ex;
854 } 845 }
855 ////////////////////////////////////////////// 846 ////////////////////////////////////////////////////////////////////////////////
856 // 847 //
857 void G4WilsonAbrasionModel::SetUseAblation (G4 848 void G4WilsonAbrasionModel::SetUseAblation (G4bool useAblation1)
858 { 849 {
859 if (useAblation != useAblation1) 850 if (useAblation != useAblation1)
860 { 851 {
861 useAblation = useAblation1; 852 useAblation = useAblation1;
862 if (useAblation) 853 if (useAblation)
863 { 854 {
864 theAblation = new G4WilsonAblationModel; 855 theAblation = new G4WilsonAblationModel;
865 theAblation->SetVerboseLevel(verboseLeve 856 theAblation->SetVerboseLevel(verboseLevel);
866 theExcitationHandler->SetEvaporation(the 857 theExcitationHandler->SetEvaporation(theAblation);
867 } 858 }
868 else 859 else
869 { 860 {
870 delete theExcitationHandler; 861 delete theExcitationHandler;
871 theAblation = nullp 862 theAblation = nullptr;
872 theExcitationHandler = new G4Excitation 863 theExcitationHandler = new G4ExcitationHandler();
873 } 864 }
874 } 865 }
875 return; 866 return;
876 } 867 }
877 ////////////////////////////////////////////// 868 ////////////////////////////////////////////////////////////////////////////////
878 // 869 //
879 void G4WilsonAbrasionModel::PrintWelcomeMessag 870 void G4WilsonAbrasionModel::PrintWelcomeMessage ()
880 { 871 {
881 G4cout <<G4endl; 872 G4cout <<G4endl;
882 G4cout <<" ********************************* 873 G4cout <<" *****************************************************************"
883 <<G4endl; 874 <<G4endl;
884 G4cout <<" Nuclear abrasion model for nuclea 875 G4cout <<" Nuclear abrasion model for nuclear-nuclear interactions activated"
885 <<G4endl; 876 <<G4endl;
886 G4cout <<" (Written by QinetiQ Ltd for the E 877 G4cout <<" (Written by QinetiQ Ltd for the European Space Agency)"
887 <<G4endl; 878 <<G4endl;
888 G4cout <<" ********************************* 879 G4cout <<" *****************************************************************"
889 <<G4endl; 880 <<G4endl;
890 G4cout << G4endl; 881 G4cout << G4endl;
891 882
892 return; 883 return;
893 } 884 }
894 ////////////////////////////////////////////// 885 ////////////////////////////////////////////////////////////////////////////////
895 // 886 //
896 887