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35 // 32 //
36 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% << 33 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
37 // 34 //
38 // MODULE: G4WilsonAbrasionModel. 35 // MODULE: G4WilsonAbrasionModel.cc
39 // 36 //
40 // Version: 1.0 << 37 // Version: B.1
41 // Date: 08/12/2009 << 38 // Date: 15/04/04
42 // Author: P R Truscott 39 // Author: P R Truscott
43 // Organisation: QinetiQ Ltd, UK 40 // Organisation: QinetiQ Ltd, UK
44 // Customer: ESA/ESTEC, NOORDWIJK 41 // Customer: ESA/ESTEC, NOORDWIJK
45 // Contract: 17191/03/NL/LvH 42 // Contract: 17191/03/NL/LvH
46 // 43 //
47 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% << 44 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
48 // 45 //
49 // CHANGE HISTORY 46 // CHANGE HISTORY
50 // -------------- 47 // --------------
51 // 48 //
52 // 6 October 2003, P R Truscott, QinetiQ Ltd, 49 // 6 October 2003, P R Truscott, QinetiQ Ltd, UK
53 // Created. 50 // Created.
54 // 51 //
55 // 15 March 2004, P R Truscott, QinetiQ Ltd, U 52 // 15 March 2004, P R Truscott, QinetiQ Ltd, UK
56 // Beta release 53 // Beta release
57 // 54 //
58 // 18 January 2005, M H Mendenhall, Vanderbilt << 55 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
59 // Pointers to theAbrasionGeometry and product << 56 ////////////////////////////////////////////////////////////////////////////////
60 // handler deleted to prevent memory leaks. A <<
61 // fragment previously not properly defined. <<
62 // <<
63 // 08 December 2009, P R Truscott, QinetiQ Ltd <<
64 // ver 1.0 <<
65 // There was originally a possibility of the m <<
66 // considering Couloumb repulsion, rm, being t <<
67 // rm >= fradius * (rP + rT) <<
68 // where fradius is currently 0.99, then it is <<
69 // unchanged. Additional conditions to escape <<
70 // parameter: if the loop counter evtcnt reach <<
71 // continued. <<
72 // Additional clauses have been included in <<
73 // G4WilsonAbrasionModel::GetNucleonInduced <<
74 // Previously it was possible to get sqrt of n <<
75 // algorithm not properly defined if either: <<
76 // rT > rP && rsq < rTsq - rPsq) or (rP > r <<
77 // <<
78 // 12 June 2012, A. Ribon, CERN, Switzerland <<
79 // Fixing trivial warning errors of shadowed v <<
80 // <<
81 // 4 August 2015, A. Ribon, CERN, Switzerland <<
82 // Replacing std::exp and std::pow with the fa <<
83 // <<
84 // 7 August 2015, A. Ribon, CERN, Switzerland <<
85 // Checking of 'while' loops. <<
86 // 57 //
87 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% <<
88 ////////////////////////////////////////////// <<
89 <<
90 #include "G4WilsonAbrasionModel.hh" 58 #include "G4WilsonAbrasionModel.hh"
91 #include "G4WilsonRadius.hh" 59 #include "G4WilsonRadius.hh"
92 #include "G4NuclearAbrasionGeometry.hh" 60 #include "G4NuclearAbrasionGeometry.hh"
93 #include "G4WilsonAblationModel.hh" 61 #include "G4WilsonAblationModel.hh"
94 62
95 #include "G4PhysicalConstants.hh" <<
96 #include "G4SystemOfUnits.hh" <<
97 #include "G4ExcitationHandler.hh" 63 #include "G4ExcitationHandler.hh"
98 #include "G4Evaporation.hh" 64 #include "G4Evaporation.hh"
>> 65 #include "G4FermiBreakUp.hh"
>> 66 #include "G4StatMF.hh"
99 #include "G4ParticleDefinition.hh" 67 #include "G4ParticleDefinition.hh"
100 #include "G4DynamicParticle.hh" 68 #include "G4DynamicParticle.hh"
101 #include "Randomize.hh" 69 #include "Randomize.hh"
102 #include "G4Fragment.hh" 70 #include "G4Fragment.hh"
>> 71 #include "G4VNuclearDensity.hh"
>> 72 #include "G4NuclearShellModelDensity.hh"
>> 73 #include "G4NuclearFermiDensity.hh"
>> 74 #include "G4FermiMomentum.hh"
103 #include "G4ReactionProductVector.hh" 75 #include "G4ReactionProductVector.hh"
104 #include "G4LorentzVector.hh" 76 #include "G4LorentzVector.hh"
105 #include "G4ParticleMomentum.hh" 77 #include "G4ParticleMomentum.hh"
106 #include "G4Poisson.hh" 78 #include "G4Poisson.hh"
107 #include "G4ParticleTable.hh" 79 #include "G4ParticleTable.hh"
108 #include "G4IonTable.hh" 80 #include "G4IonTable.hh"
109 #include "globals.hh" 81 #include "globals.hh"
110 << 82 ////////////////////////////////////////////////////////////////////////////////
111 #include "G4Exp.hh" << 83 //
112 #include "G4Pow.hh" << 84 G4WilsonAbrasionModel::G4WilsonAbrasionModel (G4bool useAblation1)
113 <<
114 #include "G4PhysicsModelCatalog.hh" <<
115 <<
116 <<
117 G4WilsonAbrasionModel::G4WilsonAbrasionModel(G <<
118 : G4HadronicInteraction("G4WilsonAbrasion"), <<
119 { 85 {
120 // Send message to stdout to advise that the << 86 //
>> 87 //
>> 88 // Send message to stdout to advise that the G4Abrasion model is being used.
>> 89 //
121 PrintWelcomeMessage(); 90 PrintWelcomeMessage();
122 << 91 //
123 // Set the default verbose level to 0 - no o << 92 //
>> 93 // Set the default verbose level to 0 - no output.
>> 94 //
124 verboseLevel = 0; 95 verboseLevel = 0;
125 useAblation = useAblation1; 96 useAblation = useAblation1;
126 theAblation = nullptr; << 97 //
127 << 98 //
128 // No de-excitation handler has been supplie << 99 // No de-excitation handler has been supplied - define the default handler.
129 << 100 //
130 theExcitationHandler = new G4ExcitationHandl << 101 theExcitationHandler = new G4ExcitationHandler;
>> 102 theExcitationHandlerx = new G4ExcitationHandler;
131 if (useAblation) 103 if (useAblation)
132 { 104 {
133 theAblation = new G4WilsonAblationModel; 105 theAblation = new G4WilsonAblationModel;
134 theAblation->SetVerboseLevel(verboseLevel) 106 theAblation->SetVerboseLevel(verboseLevel);
135 theExcitationHandler->SetEvaporation(theAb << 107 theExcitationHandler->SetEvaporation(theAblation);
>> 108 theExcitationHandlerx->SetEvaporation(theAblation);
136 } 109 }
137 << 110 else
138 // Set the minimum and maximum range for the << 111 {
139 // this is in energy per nucleon number). << 112 theAblation = NULL;
140 << 113 G4Evaporation * theEvaporation = new G4Evaporation;
>> 114 G4FermiBreakUp * theFermiBreakUp = new G4FermiBreakUp;
>> 115 G4StatMF * theMF = new G4StatMF;
>> 116 theExcitationHandler->SetEvaporation(theEvaporation);
>> 117 theExcitationHandler->SetFermiModel(theFermiBreakUp);
>> 118 theExcitationHandler->SetMultiFragmentation(theMF);
>> 119 theExcitationHandler->SetMaxAandZForFermiBreakUp(12, 6);
>> 120 theExcitationHandler->SetMinEForMultiFrag(5.0*MeV);
>> 121
>> 122 theEvaporation = new G4Evaporation;
>> 123 theFermiBreakUp = new G4FermiBreakUp;
>> 124 theExcitationHandlerx->SetEvaporation(theEvaporation);
>> 125 theExcitationHandlerx->SetFermiModel(theFermiBreakUp);
>> 126 theExcitationHandlerx->SetMaxAandZForFermiBreakUp(12, 6);
>> 127 }
>> 128 //
>> 129 //
>> 130 // Set the minimum and maximum range for the model (despite nomanclature, this
>> 131 // is in energy per nucleon number).
>> 132 //
141 SetMinEnergy(70.0*MeV); 133 SetMinEnergy(70.0*MeV);
142 SetMaxEnergy(10.1*GeV); 134 SetMaxEnergy(10.1*GeV);
143 isBlocked = false; 135 isBlocked = false;
144 << 136 //
145 // npK, when mutiplied by the nuclear Fermi << 137 //
146 // momentum over which the secondary nucleon << 138 // npK, when mutiplied by the nuclear Fermi momentum, determines the range of
147 << 139 // momentum over which the secondary nucleon momentum is sampled.
148 r0sq = 0.0; << 140 //
149 npK = 5.0; << 141 npK = 5.0;
150 B = 10.0 * MeV; << 142 B = 10.0 * MeV;
151 third = 1.0 / 3.0; << 143 third = 1.0 / 3.0;
152 fradius = 0.99; << 144 conserveEnergy = false;
153 conserveEnergy = false; <<
154 conserveMomentum = true; 145 conserveMomentum = true;
155 <<
156 // Creator model ID for the secondaries crea <<
157 secID = G4PhysicsModelCatalog::GetModelID( " <<
158 } <<
159 <<
160 void G4WilsonAbrasionModel::ModelDescription(s <<
161 { <<
162 outFile << "G4WilsonAbrasionModel is a macro <<
163 << "nucleus-nucleus collisions using <<
164 << "The smaller projectile nucleus g <<
165 << "target nucleus, leaving a residu <<
166 << "region where the projectile and <<
167 << "is then treated as a highly exci <<
168 << "model is based on the NUCFRG2 mo <<
169 << "projectile energies between 70 M <<
170 } 146 }
171 << 147 ////////////////////////////////////////////////////////////////////////////////
172 G4WilsonAbrasionModel::G4WilsonAbrasionModel(G << 148 //
173 G4HadronicInteraction("G4WilsonAbrasion"), se << 149 G4WilsonAbrasionModel::G4WilsonAbrasionModel (G4ExcitationHandler *aExcitationHandler)
174 { 150 {
>> 151 //
>> 152 //
175 // Send message to stdout to advise that the G 153 // Send message to stdout to advise that the G4Abrasion model is being used.
176 << 154 //
177 PrintWelcomeMessage(); 155 PrintWelcomeMessage();
178 << 156 //
>> 157 //
179 // Set the default verbose level to 0 - no out 158 // Set the default verbose level to 0 - no output.
180 << 159 //
181 verboseLevel = 0; 160 verboseLevel = 0;
182 << 161 //
183 theAblation = nullptr; //A.R. 26-Jul-2012 <<
184 useAblation = false; //A.R. 14-Aug-2012 <<
185 <<
186 // 162 //
187 // The user is able to provide the excitation 163 // The user is able to provide the excitation handler as well as an argument
188 // which is provided in this instantiation is 164 // which is provided in this instantiation is used to determine
189 // whether the spectators of the interaction a 165 // whether the spectators of the interaction are free following the abrasion.
190 // 166 //
191 theExcitationHandler = aExcitationHandler; << 167 theExcitationHandler = aExcitationHandler;
>> 168 theExcitationHandlerx = new G4ExcitationHandler;
>> 169 G4Evaporation * theEvaporation = new G4Evaporation;
>> 170 G4FermiBreakUp * theFermiBreakUp = new G4FermiBreakUp;
>> 171 theExcitationHandlerx->SetEvaporation(theEvaporation);
>> 172 theExcitationHandlerx->SetFermiModel(theFermiBreakUp);
>> 173 theExcitationHandlerx->SetMaxAandZForFermiBreakUp(12, 6);
192 // 174 //
193 // 175 //
194 // Set the minimum and maximum range for the m 176 // Set the minimum and maximum range for the model (despite nomanclature, this
195 // is in energy per nucleon number). 177 // is in energy per nucleon number).
196 // 178 //
197 SetMinEnergy(70.0*MeV); 179 SetMinEnergy(70.0*MeV);
198 SetMaxEnergy(10.1*GeV); 180 SetMaxEnergy(10.1*GeV);
199 isBlocked = false; 181 isBlocked = false;
200 // 182 //
201 // 183 //
202 // npK, when mutiplied by the nuclear Fermi mo 184 // npK, when mutiplied by the nuclear Fermi momentum, determines the range of
203 // momentum over which the secondary nucleon m 185 // momentum over which the secondary nucleon momentum is sampled.
204 // 186 //
205 r0sq = 0.0; <<
206 npK = 5.0; 187 npK = 5.0;
207 B = 10.0 * MeV; 188 B = 10.0 * MeV;
208 third = 1.0 / 3.0; 189 third = 1.0 / 3.0;
209 fradius = 0.99; <<
210 conserveEnergy = false; 190 conserveEnergy = false;
211 conserveMomentum = true; 191 conserveMomentum = true;
212 <<
213 // Creator model ID for the secondaries crea <<
214 secID = G4PhysicsModelCatalog::GetModelID( " <<
215 } 192 }
216 ////////////////////////////////////////////// 193 ////////////////////////////////////////////////////////////////////////////////
217 // 194 //
218 G4WilsonAbrasionModel::~G4WilsonAbrasionModel( << 195 G4WilsonAbrasionModel::~G4WilsonAbrasionModel ()
219 { 196 {
>> 197 //
>> 198 //
>> 199 // The destructor doesn't have to do a great deal!
>> 200 //
220 delete theExcitationHandler; 201 delete theExcitationHandler;
>> 202 delete theExcitationHandlerx;
221 } 203 }
222 ////////////////////////////////////////////// 204 ////////////////////////////////////////////////////////////////////////////////
223 // 205 //
224 G4HadFinalState *G4WilsonAbrasionModel::ApplyY 206 G4HadFinalState *G4WilsonAbrasionModel::ApplyYourself (
225 const G4HadProjectile &theTrack, G4Nucleus & 207 const G4HadProjectile &theTrack, G4Nucleus &theTarget)
226 { 208 {
227 // 209 //
228 // 210 //
229 // The secondaries will be returned in G4HadFi 211 // The secondaries will be returned in G4HadFinalState &theParticleChange -
230 // initialise this. The original track will a 212 // initialise this. The original track will always be discontinued and
231 // secondaries followed. 213 // secondaries followed.
232 // 214 //
233 theParticleChange.Clear(); 215 theParticleChange.Clear();
234 theParticleChange.SetStatusChange(stopAndKil 216 theParticleChange.SetStatusChange(stopAndKill);
235 // 217 //
236 // 218 //
237 // Get relevant information about the projecti 219 // Get relevant information about the projectile and target (A, Z, energy/nuc,
238 // momentum, etc). 220 // momentum, etc).
239 // 221 //
240 const G4ParticleDefinition *definitionP = th 222 const G4ParticleDefinition *definitionP = theTrack.GetDefinition();
241 const G4double AP = definitionP->GetBaryonN << 223 const G4double AP = definitionP->GetBaryonNumber();
242 const G4double ZP = definitionP->GetPDGChar << 224 const G4double ZP = definitionP->GetPDGCharge();
243 G4LorentzVector pP = theTrack.Get4Momentum() << 225 G4LorentzVector pP = theTrack.Get4Momentum();
244 G4double E = theTrack.GetKineticEner << 226 G4double E = theTrack.GetKineticEnergy()/AP;
245 G4double AT = theTarget.GetA_asInt(); << 227 G4double AT = theTarget.GetN();
246 G4double ZT = theTarget.GetZ_asInt(); << 228 G4double ZT = theTarget.GetZ();
247 G4double TotalEPre = theTrack.GetTotalEnergy << 229 G4double TotalEPre = theTrack.GetTotalEnergy() +
248 theTarget.AtomicMass(AT, ZT) + theTarget.G 230 theTarget.AtomicMass(AT, ZT) + theTarget.GetEnergyDeposit();
249 G4double TotalEPost = 0.0; 231 G4double TotalEPost = 0.0;
250 // 232 //
251 // 233 //
252 // Determine the radii of the projectile and t 234 // Determine the radii of the projectile and target nuclei.
253 // 235 //
254 G4WilsonRadius aR; 236 G4WilsonRadius aR;
255 G4double rP = aR.GetWilsonRadius(AP); 237 G4double rP = aR.GetWilsonRadius(AP);
256 G4double rT = aR.GetWilsonRadius(AT); 238 G4double rT = aR.GetWilsonRadius(AT);
257 G4double rPsq = rP * rP; 239 G4double rPsq = rP * rP;
258 G4double rTsq = rT * rT; 240 G4double rTsq = rT * rT;
259 if (verboseLevel >= 2) 241 if (verboseLevel >= 2)
260 { 242 {
261 G4cout <<"################################ 243 G4cout <<"########################################"
262 <<"################################ 244 <<"########################################"
263 <<G4endl; 245 <<G4endl;
264 G4cout.precision(6); 246 G4cout.precision(6);
265 G4cout <<"IN G4WilsonAbrasionModel" <<G4en 247 G4cout <<"IN G4WilsonAbrasionModel" <<G4endl;
266 G4cout <<"Initial projectile A=" <<AP 248 G4cout <<"Initial projectile A=" <<AP
267 <<", Z=" <<ZP 249 <<", Z=" <<ZP
268 <<", radius = " <<rP/fermi <<" fm" 250 <<", radius = " <<rP/fermi <<" fm"
269 <<G4endl; 251 <<G4endl;
270 G4cout <<"Initial target A=" <<AT 252 G4cout <<"Initial target A=" <<AT
271 <<", Z=" <<ZT 253 <<", Z=" <<ZT
272 <<", radius = " <<rT/fermi <<" fm" 254 <<", radius = " <<rT/fermi <<" fm"
273 <<G4endl; 255 <<G4endl;
274 G4cout <<"Projectile momentum and Energy/n 256 G4cout <<"Projectile momentum and Energy/nuc = " <<pP <<" ," <<E <<G4endl;
275 } 257 }
276 // 258 //
277 // 259 //
278 // The following variables are used to determi 260 // The following variables are used to determine the impact parameter in the
279 // near-field (i.e. taking into consideration 261 // near-field (i.e. taking into consideration the electrostatic repulsion).
280 // 262 //
281 G4double rm = ZP * ZT * elm_coupling / (E 263 G4double rm = ZP * ZT * elm_coupling / (E * AP);
282 G4double r = 0.0; 264 G4double r = 0.0;
283 G4double rsq = 0.0; 265 G4double rsq = 0.0;
284 // 266 //
285 // 267 //
286 // Initialise some of the variables which wll 268 // Initialise some of the variables which wll be used to calculate the chord-
287 // length for nucleons in the projectile and t 269 // length for nucleons in the projectile and target, and hence calculate the
288 // number of abraded nucleons and the excitati 270 // number of abraded nucleons and the excitation energy.
289 // 271 //
290 G4NuclearAbrasionGeometry *theAbrasionGeomet << 272 G4NuclearAbrasionGeometry *theAbrasionGeometry = NULL;
291 G4double CT = 0.0; 273 G4double CT = 0.0;
292 G4double F = 0.0; 274 G4double F = 0.0;
293 G4int Dabr = 0; 275 G4int Dabr = 0;
294 // 276 //
295 // 277 //
296 // The following loop is performed until the n 278 // The following loop is performed until the number of nucleons which are
297 // abraded by the process is >1, i.e. an inter 279 // abraded by the process is >1, i.e. an interaction MUST occur.
298 // 280 //
299 G4bool skipInteraction = false; // It will << 281 while (Dabr == 0)
300 const G4int maxNumberOfLoops = 1000; <<
301 G4int loopCounter = -1; <<
302 while (Dabr == 0 && ++loopCounter < maxNumbe <<
303 { 282 {
304 // 283 //
305 // 284 //
306 // Sample the impact parameter. For the momen 285 // Sample the impact parameter. For the moment, this class takes account of
307 // electrostatic effects on the impact paramet 286 // electrostatic effects on the impact parameter, but (like HZETRN AND NUCFRG2)
308 // does not make any correction for the effect 287 // does not make any correction for the effects of nuclear-nuclear repulsion.
309 // 288 //
310 G4double rPT = rP + rT; 289 G4double rPT = rP + rT;
311 G4double rPTsq = rPT * rPT; 290 G4double rPTsq = rPT * rPT;
312 // <<
313 // <<
314 // This is a "catch" to make sure we don't go <<
315 // energy is too low to overcome nuclear repul <<
316 // value of rm < fradius * rPT then we're unli <<
317 // impact parameter (energy of incident partic <<
318 // <<
319 if (rm >= fradius * rPT) { <<
320 skipInteraction = true; <<
321 } <<
322 // <<
323 // <<
324 // Now sample impact parameter until the crite <<
325 // and target overlap, but repulsion is taken <<
326 // <<
327 G4int evtcnt = 0; <<
328 r = 1.1 * rPT; 291 r = 1.1 * rPT;
329 while (r > rPT && ++evtcnt < 1000) /* Loo << 292 while (r > rPT)
330 { 293 {
331 G4double bsq = rPTsq * G4UniformRand(); 294 G4double bsq = rPTsq * G4UniformRand();
332 r = (rm + std::sqrt(rm*rm + 4 295 r = (rm + std::sqrt(rm*rm + 4.0*bsq)) / 2.0;
333 } 296 }
334 // <<
335 // <<
336 // We've tried to sample this 1000 times, but <<
337 // <<
338 if (evtcnt >= 1000) { <<
339 skipInteraction = true; <<
340 } <<
341 <<
342 rsq = r * r; 297 rsq = r * r;
343 // 298 //
344 // 299 //
345 // Now determine the chord-length through the 300 // Now determine the chord-length through the target nucleus.
346 // 301 //
347 if (rT > rP) 302 if (rT > rP)
348 { 303 {
349 G4double x = (rPsq + rsq - rTsq) / 2.0 / 304 G4double x = (rPsq + rsq - rTsq) / 2.0 / r;
350 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - 305 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - x*x);
351 else CT = 2.0 * std::sqrt(rTsq - 306 else CT = 2.0 * std::sqrt(rTsq - rsq);
352 } 307 }
353 else 308 else
354 { 309 {
355 G4double x = (rTsq + rsq - rPsq) / 2.0 / 310 G4double x = (rTsq + rsq - rPsq) / 2.0 / r;
356 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - 311 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - x*x);
357 else CT = 2.0 * rT; 312 else CT = 2.0 * rT;
358 } 313 }
359 // 314 //
360 // 315 //
361 // Determine the number of abraded nucleons. 316 // Determine the number of abraded nucleons. Note that the mean number of
362 // abraded nucleons is used to sample the Pois 317 // abraded nucleons is used to sample the Poisson distribution. The Poisson
363 // distribution is sampled only ten times with 318 // distribution is sampled only ten times with the current impact parameter,
364 // and if it fails after this to find a case f 319 // 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 320 // nucleons >1, the impact parameter is re-sampled.
366 // 321 //
367 delete theAbrasionGeometry; <<
368 theAbrasionGeometry = new G4NuclearAbrasio 322 theAbrasionGeometry = new G4NuclearAbrasionGeometry(AP,AT,r);
369 F = theAbrasionGeometry- 323 F = theAbrasionGeometry->F();
370 G4double lambda = 16.6*fermi / G4Pow:: << 324 G4double lambda = 16.6*fermi / std::pow(E/MeV,0.26);
371 G4double Mabr = F * AP * (1.0 - G4Ex << 325 G4double Mabr = F * AP * (1.0 - std::exp(-CT/lambda));
372 G4long n = 0; 326 G4long n = 0;
373 for (G4int i = 0; i<10; ++i) << 327 for (G4int i = 0; i<10; i++)
374 { 328 {
375 n = G4Poisson(Mabr); 329 n = G4Poisson(Mabr);
376 if (n > 0) 330 if (n > 0)
377 { 331 {
378 if (n>AP) Dabr = (G4int) AP; 332 if (n>AP) Dabr = (G4int) AP;
379 else Dabr = (G4int) n; 333 else Dabr = (G4int) n;
380 break; 334 break;
381 } 335 }
382 } 336 }
383 } // End of while loop <<
384 <<
385 if ( loopCounter >= maxNumberOfLoops || skip <<
386 // Assume nuclei do not collide and return <<
387 theParticleChange.SetStatusChange(isAlive) <<
388 theParticleChange.SetEnergyChange(theTrack <<
389 theParticleChange.SetMomentumChange(theTra <<
390 if (verboseLevel >= 2) { <<
391 G4cout <<"Particle energy too low to ove <<
392 G4cout <<"Event rejected and original tr <<
393 G4cout <<"############################## <<
394 <<"############################## <<
395 <<G4endl; <<
396 } <<
397 delete theAbrasionGeometry; <<
398 return &theParticleChange; <<
399 } 337 }
400 <<
401 if (verboseLevel >= 2) 338 if (verboseLevel >= 2)
402 { 339 {
403 G4cout <<G4endl; 340 G4cout <<G4endl;
404 G4cout <<"Impact parameter = " <<r/ferm 341 G4cout <<"Impact parameter = " <<r/fermi <<" fm" <<G4endl;
405 G4cout <<"# Abraded nucleons = " <<Dabr < 342 G4cout <<"# Abraded nucleons = " <<Dabr <<G4endl;
406 } 343 }
407 // 344 //
408 // 345 //
409 // The number of abraded nucleons must be no g 346 // The number of abraded nucleons must be no greater than the number of
410 // nucleons in either the projectile or the ta 347 // nucleons in either the projectile or the target. If AP - Dabr < 2 or
411 // AT - Dabr < 2 then either we have only a nu 348 // AT - Dabr < 2 then either we have only a nucleon left behind in the
412 // projectile/target or we've tried to abrade 349 // projectile/target or we've tried to abrade too many nucleons - and Dabr
413 // should be limited. 350 // should be limited.
414 // 351 //
415 if (AP - (G4double) Dabr < 2.0) Dabr = (G4in 352 if (AP - (G4double) Dabr < 2.0) Dabr = (G4int) AP;
416 if (AT - (G4double) Dabr < 2.0) Dabr = (G4in 353 if (AT - (G4double) Dabr < 2.0) Dabr = (G4int) AT;
417 // 354 //
418 // 355 //
419 // Determine the abraded secondary nucleons fr 356 // Determine the abraded secondary nucleons from the projectile. *fragmentP
420 // is a pointer to the prefragment from the pr 357 // is a pointer to the prefragment from the projectile and nSecP is the number
421 // of nucleons in theParticleChange which have 358 // of nucleons in theParticleChange which have been abraded. The total energy
422 // from these is determined. 359 // from these is determined.
423 // 360 //
424 G4ThreeVector boost = pP.findBoostToCM(); 361 G4ThreeVector boost = pP.findBoostToCM();
425 G4Fragment *fragmentP = GetAbradedNucleons ( 362 G4Fragment *fragmentP = GetAbradedNucleons (Dabr, AP, ZP, rP);
426 G4int nSecP = (G4int)theParticleCh << 363 G4int nSecP = theParticleChange.GetNumberOfSecondaries();
427 G4int i = 0; 364 G4int i = 0;
428 for (i=0; i<nSecP; ++i) << 365 for (i=0; i<nSecP; i++)
429 { 366 {
430 TotalEPost += theParticleChange.GetSeconda 367 TotalEPost += theParticleChange.GetSecondary(i)->
431 GetParticle()->GetTotalEnergy(); 368 GetParticle()->GetTotalEnergy();
432 } 369 }
433 // 370 //
434 // 371 //
435 // Determine the number of spectators in the i 372 // Determine the number of spectators in the interaction region for the
436 // projectile. 373 // projectile.
437 // 374 //
438 G4int DspcP = (G4int) (AP*F) - Dabr; 375 G4int DspcP = (G4int) (AP*F) - Dabr;
439 if (DspcP <= 0) DspcP = 0; 376 if (DspcP <= 0) DspcP = 0;
440 else if (DspcP > AP-Dabr) DspcP = ((G4int) A 377 else if (DspcP > AP-Dabr) DspcP = ((G4int) AP) - Dabr;
441 // 378 //
442 // 379 //
443 // Determine excitation energy associated with 380 // Determine excitation energy associated with excess surface area of the
444 // projectile (EsP) and the excitation due to 381 // projectile (EsP) and the excitation due to scattering of nucleons which are
445 // retained within the projectile (ExP). Add 382 // retained within the projectile (ExP). Add the total energy from the excited
446 // nucleus to the total energy of the secondar 383 // nucleus to the total energy of the secondaries.
447 // 384 //
448 G4bool excitationAbsorbedByProjectile = fals 385 G4bool excitationAbsorbedByProjectile = false;
449 if (fragmentP != nullptr) << 386 if (fragmentP != NULL)
450 { 387 {
451 G4double EsP = theAbrasionGeometry->GetExc 388 G4double EsP = theAbrasionGeometry->GetExcitationEnergyOfProjectile();
452 G4double ExP = 0.0; 389 G4double ExP = 0.0;
453 if (Dabr < AT) 390 if (Dabr < AT)
454 excitationAbsorbedByProjectile = G4Unifo 391 excitationAbsorbedByProjectile = G4UniformRand() < 0.5;
455 if (excitationAbsorbedByProjectile) 392 if (excitationAbsorbedByProjectile)
456 ExP = GetNucleonInducedExcitation(rP, rT 393 ExP = GetNucleonInducedExcitation(rP, rT, r);
457 G4double xP = EsP + ExP; 394 G4double xP = EsP + ExP;
458 if (xP > B*(AP-Dabr)) xP = B*(AP-Dabr); 395 if (xP > B*(AP-Dabr)) xP = B*(AP-Dabr);
459 G4LorentzVector lorentzVector = fragmentP- 396 G4LorentzVector lorentzVector = fragmentP->GetMomentum();
460 lorentzVector.setE(lorentzVector.e()+xP); 397 lorentzVector.setE(lorentzVector.e()+xP);
461 fragmentP->SetMomentum(lorentzVector); 398 fragmentP->SetMomentum(lorentzVector);
462 TotalEPost += lorentzVector.e(); 399 TotalEPost += lorentzVector.e();
463 } 400 }
464 G4double EMassP = TotalEPost; 401 G4double EMassP = TotalEPost;
465 // 402 //
466 // 403 //
467 // Determine the abraded secondary nucleons fr 404 // Determine the abraded secondary nucleons from the target. Note that it's
468 // assumed that the same number of nucleons ar 405 // assumed that the same number of nucleons are abraded from the target as for
469 // the projectile, and obviously no boost is a 406 // the projectile, and obviously no boost is applied to the products. *fragmentT
470 // is a pointer to the prefragment from the ta 407 // is a pointer to the prefragment from the target and nSec is the total number
471 // of nucleons in theParticleChange which have 408 // of nucleons in theParticleChange which have been abraded. The total energy
472 // from these is determined. 409 // from these is determined.
473 // 410 //
474 G4Fragment *fragmentT = GetAbradedNucleons ( 411 G4Fragment *fragmentT = GetAbradedNucleons (Dabr, AT, ZT, rT);
475 G4int nSec = (G4int)theParticleChange.GetNum << 412 G4int nSec = theParticleChange.GetNumberOfSecondaries();
476 for (i=nSecP; i<nSec; ++i) << 413 for (i=nSecP; i<nSec; i++)
477 { 414 {
478 TotalEPost += theParticleChange.GetSeconda 415 TotalEPost += theParticleChange.GetSecondary(i)->
479 GetParticle()->GetTotalEnergy(); 416 GetParticle()->GetTotalEnergy();
480 } 417 }
481 // 418 //
482 // 419 //
483 // Determine the number of spectators in the i 420 // Determine the number of spectators in the interaction region for the
484 // target. 421 // target.
485 // 422 //
486 G4int DspcT = (G4int) (AT*F) - Dabr; 423 G4int DspcT = (G4int) (AT*F) - Dabr;
487 if (DspcT <= 0) DspcT = 0; 424 if (DspcT <= 0) DspcT = 0;
488 else if (DspcT > AP-Dabr) DspcT = ((G4int) A 425 else if (DspcT > AP-Dabr) DspcT = ((G4int) AT) - Dabr;
489 // 426 //
490 // 427 //
491 // Determine excitation energy associated with 428 // Determine excitation energy associated with excess surface area of the
492 // target (EsT) and the excitation due to scat 429 // target (EsT) and the excitation due to scattering of nucleons which are
493 // retained within the target (ExT). Add the 430 // retained within the target (ExT). Add the total energy from the excited
494 // nucleus to the total energy of the secondar 431 // nucleus to the total energy of the secondaries.
495 // 432 //
496 if (fragmentT != nullptr) << 433 if (fragmentT != NULL)
497 { 434 {
498 G4double EsT = theAbrasionGeometry->GetExc 435 G4double EsT = theAbrasionGeometry->GetExcitationEnergyOfTarget();
499 G4double ExT = 0.0; 436 G4double ExT = 0.0;
500 if (!excitationAbsorbedByProjectile) 437 if (!excitationAbsorbedByProjectile)
501 ExT = GetNucleonInducedExcitation(rT, rP 438 ExT = GetNucleonInducedExcitation(rT, rP, r);
502 G4double xT = EsT + ExT; 439 G4double xT = EsT + ExT;
503 if (xT > B*(AT-Dabr)) xT = B*(AT-Dabr); 440 if (xT > B*(AT-Dabr)) xT = B*(AT-Dabr);
504 G4LorentzVector lorentzVector = fragmentT- 441 G4LorentzVector lorentzVector = fragmentT->GetMomentum();
505 lorentzVector.setE(lorentzVector.e()+xT); 442 lorentzVector.setE(lorentzVector.e()+xT);
506 fragmentT->SetMomentum(lorentzVector); 443 fragmentT->SetMomentum(lorentzVector);
507 TotalEPost += lorentzVector.e(); 444 TotalEPost += lorentzVector.e();
508 } 445 }
509 // 446 //
510 // 447 //
511 // Now determine the difference between the pr 448 // Now determine the difference between the pre and post interaction
512 // energy - this will be used to determine the 449 // energy - this will be used to determine the Lorentz boost if conservation
513 // of energy is to be imposed/attempted. 450 // of energy is to be imposed/attempted.
514 // 451 //
515 G4double deltaE = TotalEPre - TotalEPost; 452 G4double deltaE = TotalEPre - TotalEPost;
516 if (deltaE > 0.0 && conserveEnergy) 453 if (deltaE > 0.0 && conserveEnergy)
517 { 454 {
518 G4double beta = std::sqrt(1.0 - EMassP*EMa << 455 G4double beta = std::sqrt(1.0 - EMassP*EMassP/std::pow(deltaE+EMassP,2.0));
519 boost = boost / boost.mag() * beta; 456 boost = boost / boost.mag() * beta;
520 } 457 }
521 // 458 //
522 // 459 //
523 // Now boost the secondaries from the projecti 460 // Now boost the secondaries from the projectile.
524 // 461 //
525 G4ThreeVector pBalance = pP.vect(); 462 G4ThreeVector pBalance = pP.vect();
526 for (i=0; i<nSecP; ++i) << 463 for (i=0; i<nSecP; i++)
527 { 464 {
528 G4DynamicParticle *dynamicP = theParticleC 465 G4DynamicParticle *dynamicP = theParticleChange.GetSecondary(i)->
529 GetParticle(); 466 GetParticle();
530 G4LorentzVector lorentzVector = dynamicP-> 467 G4LorentzVector lorentzVector = dynamicP->Get4Momentum();
531 lorentzVector.boost(-boost); 468 lorentzVector.boost(-boost);
532 dynamicP->Set4Momentum(lorentzVector); 469 dynamicP->Set4Momentum(lorentzVector);
533 pBalance -= lorentzVector.vect(); 470 pBalance -= lorentzVector.vect();
534 } 471 }
535 // 472 //
536 // 473 //
537 // Set the boost for the projectile prefragmen 474 // Set the boost for the projectile prefragment. This is now based on the
538 // conservation of momentum. However, if the 475 // conservation of momentum. However, if the user selected momentum of the
539 // prefragment is not to be conserved this sim 476 // prefragment is not to be conserved this simply boosted to the velocity of the
540 // original projectile times the ratio of the 477 // original projectile times the ratio of the unexcited to the excited mass
541 // of the prefragment (the excitation increase 478 // of the prefragment (the excitation increases the effective mass of the
542 // prefragment, and therefore modifying the bo 479 // prefragment, and therefore modifying the boost is an attempt to prevent
543 // the momentum of the prefragment being exces 480 // the momentum of the prefragment being excessive).
544 // 481 //
545 if (fragmentP != nullptr) << 482 if (fragmentP != NULL)
546 { 483 {
547 G4LorentzVector lorentzVector = fragmentP- 484 G4LorentzVector lorentzVector = fragmentP->GetMomentum();
548 G4double fragmentM = lorentzVec << 485 G4double m = lorentzVector.m();
549 if (conserveMomentum) 486 if (conserveMomentum)
550 fragmentP->SetMomentum 487 fragmentP->SetMomentum
551 (G4LorentzVector(pBalance,std::sqrt(pB << 488 (G4LorentzVector(pBalance,std::sqrt(pBalance.mag2()+m*m+1.0*eV*eV)));
552 else 489 else
553 { 490 {
554 G4double fragmentGroundStateM = fragment << 491 G4double mg = fragmentP->GetGroundStateMass();
555 fragmentP->SetMomentum(lorentzVector.boo << 492 fragmentP->SetMomentum(lorentzVector.boost(-boost * mg/m));
556 } 493 }
557 } 494 }
558 // 495 //
559 // 496 //
560 // Output information to user if verbose infor 497 // Output information to user if verbose information requested.
561 // 498 //
562 if (verboseLevel >= 2) 499 if (verboseLevel >= 2)
563 { 500 {
564 G4cout <<G4endl; 501 G4cout <<G4endl;
565 G4cout <<"-------------------------------- 502 G4cout <<"-----------------------------------" <<G4endl;
566 G4cout <<"Secondary nucleons from projecti 503 G4cout <<"Secondary nucleons from projectile:" <<G4endl;
567 G4cout <<"-------------------------------- 504 G4cout <<"-----------------------------------" <<G4endl;
568 G4cout.precision(7); 505 G4cout.precision(7);
569 for (i=0; i<nSecP; ++i) << 506 for (i=0; i<nSecP; i++)
570 { 507 {
571 G4cout <<"Particle # " <<i <<G4endl; 508 G4cout <<"Particle # " <<i <<G4endl;
572 theParticleChange.GetSecondary(i)->GetPa 509 theParticleChange.GetSecondary(i)->GetParticle()->DumpInfo();
573 G4DynamicParticle *dyn = theParticleChan 510 G4DynamicParticle *dyn = theParticleChange.GetSecondary(i)->GetParticle();
574 G4cout <<"New nucleon (P) " <<dyn->GetDe 511 G4cout <<"New nucleon (P) " <<dyn->GetDefinition()->GetParticleName()
575 <<" : " <<dyn->Get4M 512 <<" : " <<dyn->Get4Momentum()
576 <<G4endl; 513 <<G4endl;
577 } 514 }
578 G4cout <<"---------------------------" <<G 515 G4cout <<"---------------------------" <<G4endl;
579 G4cout <<"The projectile prefragment:" <<G 516 G4cout <<"The projectile prefragment:" <<G4endl;
580 G4cout <<"---------------------------" <<G 517 G4cout <<"---------------------------" <<G4endl;
581 if (fragmentP != nullptr) << 518 if (fragmentP != NULL)
582 G4cout <<*fragmentP <<G4endl; 519 G4cout <<*fragmentP <<G4endl;
583 else 520 else
584 G4cout <<"(No residual prefragment)" <<G 521 G4cout <<"(No residual prefragment)" <<G4endl;
585 G4cout <<G4endl; 522 G4cout <<G4endl;
586 G4cout <<"-------------------------------" 523 G4cout <<"-------------------------------" <<G4endl;
587 G4cout <<"Secondary nucleons from target:" 524 G4cout <<"Secondary nucleons from target:" <<G4endl;
588 G4cout <<"-------------------------------" 525 G4cout <<"-------------------------------" <<G4endl;
589 G4cout.precision(7); 526 G4cout.precision(7);
590 for (i=nSecP; i<nSec; ++i) << 527 for (i=nSecP; i<nSec; i++)
591 { 528 {
592 G4cout <<"Particle # " <<i <<G4endl; 529 G4cout <<"Particle # " <<i <<G4endl;
593 theParticleChange.GetSecondary(i)->GetPa 530 theParticleChange.GetSecondary(i)->GetParticle()->DumpInfo();
594 G4DynamicParticle *dyn = theParticleChan 531 G4DynamicParticle *dyn = theParticleChange.GetSecondary(i)->GetParticle();
595 G4cout <<"New nucleon (T) " <<dyn->GetDe 532 G4cout <<"New nucleon (T) " <<dyn->GetDefinition()->GetParticleName()
596 <<" : " <<dyn->Get4M 533 <<" : " <<dyn->Get4Momentum()
597 <<G4endl; 534 <<G4endl;
598 } 535 }
599 G4cout <<"-----------------------" <<G4end 536 G4cout <<"-----------------------" <<G4endl;
600 G4cout <<"The target prefragment:" <<G4end 537 G4cout <<"The target prefragment:" <<G4endl;
601 G4cout <<"-----------------------" <<G4end 538 G4cout <<"-----------------------" <<G4endl;
602 if (fragmentT != nullptr) << 539 if (fragmentT != NULL)
603 G4cout <<*fragmentT <<G4endl; 540 G4cout <<*fragmentT <<G4endl;
604 else 541 else
605 G4cout <<"(No residual prefragment)" <<G 542 G4cout <<"(No residual prefragment)" <<G4endl;
606 } 543 }
607 // 544 //
608 // 545 //
609 // Now we can decay the nuclear fragments if p 546 // Now we can decay the nuclear fragments if present. The secondaries are
610 // collected and boosted as well. This is per 547 // collected and boosted as well. This is performed first for the projectile...
611 // 548 //
612 if (fragmentP !=nullptr) << 549 if (fragmentP !=NULL)
613 { 550 {
614 G4ReactionProductVector *products = nullpt << 551 G4ReactionProductVector *products = NULL;
615 // if (fragmentP->GetZ_asInt() != fragm << 552 if (fragmentP->GetZ() != fragmentP->GetA())
616 products = theExcitationHandler->BreakItUp << 553 products = theExcitationHandler->BreakItUp(*fragmentP);
617 // else << 554 else
618 // products = theExcitationHandlerx->Bre << 555 products = theExcitationHandlerx->BreakItUp(*fragmentP);
619 delete fragmentP; 556 delete fragmentP;
620 fragmentP = nullptr; << 557 fragmentP = NULL;
621 558
622 G4ReactionProductVector::iterator iter; 559 G4ReactionProductVector::iterator iter;
623 for (iter = products->begin(); iter != pro 560 for (iter = products->begin(); iter != products->end(); ++iter)
624 { 561 {
625 G4DynamicParticle *secondary = 562 G4DynamicParticle *secondary =
626 new G4DynamicParticle((*iter)->GetDefi 563 new G4DynamicParticle((*iter)->GetDefinition(),
627 (*iter)->GetTotalEnergy(), (*iter)->Ge 564 (*iter)->GetTotalEnergy(), (*iter)->GetMomentum());
628 theParticleChange.AddSecondary (secondar <<
629 G4String particleName = (*iter)->GetDefi 565 G4String particleName = (*iter)->GetDefinition()->GetParticleName();
630 delete (*iter); // get rid of leftover p <<
631 if (verboseLevel >= 2 && particleName.fi 566 if (verboseLevel >= 2 && particleName.find("[",0) < particleName.size())
632 { 567 {
633 G4cout <<"------------------------" << 568 G4cout <<"------------------------" <<G4endl;
634 G4cout <<"The projectile fragment:" << 569 G4cout <<"The projectile fragment:" <<G4endl;
635 G4cout <<"------------------------" << 570 G4cout <<"------------------------" <<G4endl;
636 G4cout <<" fragmentP = " <<particleNam 571 G4cout <<" fragmentP = " <<particleName
637 <<" Energy = " <<secondary-> 572 <<" Energy = " <<secondary->GetKineticEnergy()
638 <<G4endl; 573 <<G4endl;
639 } 574 }
640 } 575 }
641 delete products; <<
642 } 576 }
643 // 577 //
644 // 578 //
645 // Now decay the target nucleus - no boost is 579 // Now decay the target nucleus - no boost is applied since in this
646 // approximation it is assumed that there is n 580 // approximation it is assumed that there is negligible momentum transfer from
647 // the projectile. 581 // the projectile.
648 // 582 //
649 if (fragmentT != nullptr) << 583 if (fragmentT != NULL)
650 { 584 {
651 G4ReactionProductVector *products = nullpt << 585 G4ReactionProductVector *products = NULL;
652 // if (fragmentT->GetZ_asInt() != fragm << 586 if (fragmentT->GetZ() != fragmentT->GetA())
653 products = theExcitationHandler->BreakIt 587 products = theExcitationHandler->BreakItUp(*fragmentT);
654 // else << 588 else
655 // products = theExcitationHandlerx->Bre << 589 products = theExcitationHandlerx->BreakItUp(*fragmentT);
656 // delete fragmentT; << 590 delete fragmentT;
657 fragmentT = nullptr; << 591 fragmentT = NULL;
658 592
659 G4ReactionProductVector::iterator iter; 593 G4ReactionProductVector::iterator iter;
660 for (iter = products->begin(); iter != pro 594 for (iter = products->begin(); iter != products->end(); ++iter)
661 { 595 {
662 G4DynamicParticle *secondary = 596 G4DynamicParticle *secondary =
663 new G4DynamicParticle((*iter)->GetDefi 597 new G4DynamicParticle((*iter)->GetDefinition(),
664 (*iter)->GetTotalEnergy(), (*iter)->Ge 598 (*iter)->GetTotalEnergy(), (*iter)->GetMomentum());
665 theParticleChange.AddSecondary (secondar << 599 theParticleChange.AddSecondary (secondary);
666 G4String particleName = (*iter)->GetDefi 600 G4String particleName = (*iter)->GetDefinition()->GetParticleName();
667 delete (*iter); // get rid of leftover p <<
668 if (verboseLevel >= 2 && particleName.fi 601 if (verboseLevel >= 2 && particleName.find("[",0) < particleName.size())
669 { 602 {
670 G4cout <<"--------------------" <<G4en 603 G4cout <<"--------------------" <<G4endl;
671 G4cout <<"The target fragment:" <<G4en 604 G4cout <<"The target fragment:" <<G4endl;
672 G4cout <<"--------------------" <<G4en 605 G4cout <<"--------------------" <<G4endl;
673 G4cout <<" fragmentT = " <<particleNam 606 G4cout <<" fragmentT = " <<particleName
674 <<" Energy = " <<secondary-> 607 <<" Energy = " <<secondary->GetKineticEnergy()
675 <<G4endl; 608 <<G4endl;
676 } 609 }
677 } 610 }
678 delete products; <<
679 } 611 }
680 612
681 if (verboseLevel >= 2) 613 if (verboseLevel >= 2)
682 G4cout <<"############################### 614 G4cout <<"########################################"
683 <<"############################### 615 <<"########################################"
684 <<G4endl; 616 <<G4endl;
685 617
686 delete theAbrasionGeometry; 618 delete theAbrasionGeometry;
>> 619
687 return &theParticleChange; 620 return &theParticleChange;
688 } 621 }
689 ////////////////////////////////////////////// 622 ////////////////////////////////////////////////////////////////////////////////
690 // 623 //
691 G4Fragment *G4WilsonAbrasionModel::GetAbradedN 624 G4Fragment *G4WilsonAbrasionModel::GetAbradedNucleons (G4int Dabr, G4double A,
692 G4double Z, G4double r) 625 G4double Z, G4double r)
693 { 626 {
694 // 627 //
695 // 628 //
696 // Initialise variables. tau is the Fermi rad 629 // Initialise variables. tau is the Fermi radius of the nucleus. The variables
697 // p..., C... and gamma are used to help sampl << 630 // p..., C... and g(amma) are used to help sample the secondary nucleon
698 // spectrum. 631 // spectrum.
699 // 632 //
700 633
701 G4double pK = hbarc * G4Pow::GetInstance() << 634 G4double pK = hbarc * std::pow(9.0 * pi / 4.0 * A, third) / (1.29 * r);
702 if (A <= 24.0) pK *= -0.229*G4Pow::GetInstan << 635 if (A <= 24.0) pK *= -0.229*std::pow(A,third) + 1.62;
703 G4double pKsq = pK * pK; 636 G4double pKsq = pK * pK;
704 G4double p1sq = 2.0/5.0 * pKsq; 637 G4double p1sq = 2.0/5.0 * pKsq;
705 G4double p2sq = 6.0/5.0 * pKsq; 638 G4double p2sq = 6.0/5.0 * pKsq;
706 G4double p3sq = 500.0 * 500.0; 639 G4double p3sq = 500.0 * 500.0;
707 G4double C1 = 1.0; 640 G4double C1 = 1.0;
708 G4double C2 = 0.03; 641 G4double C2 = 0.03;
709 G4double C3 = 0.0002; 642 G4double C3 = 0.0002;
710 G4double gamma = 90.0 * MeV; << 643 G4double g = 90.0 * MeV;
711 G4double maxn = C1 + C2 + C3; 644 G4double maxn = C1 + C2 + C3;
712 // 645 //
713 // 646 //
714 // initialise the number of secondary nucleons 647 // initialise the number of secondary nucleons abraded to zero, and initially set
715 // the type of nucleon abraded to proton ... j 648 // the type of nucleon abraded to proton ... just for now.
716 // 649 //
717 G4double Aabr = 0.0; 650 G4double Aabr = 0.0;
718 G4double Zabr = 0.0; 651 G4double Zabr = 0.0;
719 G4ParticleDefinition *typeNucleon = G4Proton 652 G4ParticleDefinition *typeNucleon = G4Proton::ProtonDefinition();
720 G4DynamicParticle *dynamicNucleon = nullptr; << 653 G4DynamicParticle *dynamicNucleon = NULL;
721 G4ParticleMomentum pabr(0.0, 0.0, 0.0); 654 G4ParticleMomentum pabr(0.0, 0.0, 0.0);
722 // 655 //
723 // 656 //
724 // Now go through each abraded nucleon and sam 657 // Now go through each abraded nucleon and sample type, spectrum and angle.
725 // 658 //
726 G4bool isForLoopExitAnticipated = false; << 659 for (G4int i=0; i<Dabr; i++)
727 for (G4int i=0; i<Dabr; ++i) <<
728 { 660 {
729 // 661 //
730 // 662 //
731 // Sample the nucleon momentum distribution by 663 // Sample the nucleon momentum distribution by simple rejection techniques. We
732 // reject values of p == 0.0 since this causes 664 // reject values of p == 0.0 since this causes bad behaviour in the sinh term.
733 // 665 //
734 G4double p = 0.0; 666 G4double p = 0.0;
735 G4bool found = false; 667 G4bool found = false;
736 const G4int maxNumberOfLoops = 100000; << 668 while (!found)
737 G4int loopCounter = -1; <<
738 while (!found && ++loopCounter < maxNumber <<
739 { 669 {
740 while (p <= 0.0) p = npK * pK * G4Unifor << 670 while (p <= 0.0) p = npK * pK * G4UniformRand();
741 G4double psq = p * p; 671 G4double psq = p * p;
742 found = maxn * G4UniformRand() < C1*G4Ex << 672 found = maxn * G4UniformRand() < C1*std::exp(-psq/p1sq/2.0) +
743 C2*G4Exp(-psq/p2sq/2.0) + C3*G4Exp(-ps << 673 C2*std::exp(-psq/p2sq/2.0) + C3*std::exp(-psq/p3sq/2.0) + p/g/std::sinh(p/g);
744 } <<
745 if ( loopCounter >= maxNumberOfLoops ) <<
746 { <<
747 isForLoopExitAnticipated = true; <<
748 break; <<
749 } 674 }
750 // 675 //
751 // 676 //
752 // Determine the type of particle abraded. Ca 677 // Determine the type of particle abraded. Can only be proton or neutron,
753 // and the probability is determine to be prop 678 // and the probability is determine to be proportional to the ratio as found
754 // in the nucleus at each stage. 679 // in the nucleus at each stage.
755 // 680 //
756 G4double prob = (Z-Zabr)/(A-Aabr); 681 G4double prob = (Z-Zabr)/(A-Aabr);
757 if (G4UniformRand()<prob) 682 if (G4UniformRand()<prob)
758 { 683 {
759 Zabr++; 684 Zabr++;
760 typeNucleon = G4Proton::ProtonDefinition 685 typeNucleon = G4Proton::ProtonDefinition();
761 } 686 }
762 else 687 else
763 typeNucleon = G4Neutron::NeutronDefiniti 688 typeNucleon = G4Neutron::NeutronDefinition();
764 Aabr++; 689 Aabr++;
765 // 690 //
766 // 691 //
767 // The angular distribution of the secondary n 692 // The angular distribution of the secondary nucleons is approximated to an
768 // isotropic distribution in the rest frame of 693 // isotropic distribution in the rest frame of the nucleus (this will be Lorentz
769 // boosted later. 694 // boosted later.
770 // 695 //
771 G4double costheta = 2.*G4UniformRand()-1.0 696 G4double costheta = 2.*G4UniformRand()-1.0;
772 G4double sintheta = std::sqrt((1.0 - costh 697 G4double sintheta = std::sqrt((1.0 - costheta)*(1.0 + costheta));
773 G4double phi = 2.0*pi*G4UniformRand() 698 G4double phi = 2.0*pi*G4UniformRand()*rad;
774 G4ThreeVector direction(sintheta*std::cos( 699 G4ThreeVector direction(sintheta*std::cos(phi),sintheta*std::sin(phi),costheta);
775 G4double nucleonMass = typeNucleon->GetPDG 700 G4double nucleonMass = typeNucleon->GetPDGMass();
776 G4double E = std::sqrt(p*p + nuc 701 G4double E = std::sqrt(p*p + nucleonMass*nucleonMass)-nucleonMass;
777 dynamicNucleon = new G4DynamicParticle(typ 702 dynamicNucleon = new G4DynamicParticle(typeNucleon,direction,E);
778 theParticleChange.AddSecondary (dynamicNuc << 703 theParticleChange.AddSecondary (dynamicNucleon);
779 pabr += p*direction; 704 pabr += p*direction;
780 } 705 }
781 // 706 //
782 // 707 //
783 // Next determine the details of the nuclear p 708 // Next determine the details of the nuclear prefragment .. that is if there
784 // is one or more protons in the residue. (No 709 // 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 710 // energy is a safety factor to avoid any possibility of negative rest mass
786 // energy.) 711 // energy.)
787 // 712 //
788 G4Fragment *fragment = nullptr; << 713 G4Fragment *fragment = NULL;
789 if ( ! isForLoopExitAnticipated && Z-Zabr>=1 << 714 if (Z-Zabr>=1.0)
790 { 715 {
791 G4double ionMass = G4ParticleTable::GetPar 716 G4double ionMass = G4ParticleTable::GetParticleTable()->GetIonTable()->
792 GetIonMass(G4lrint(Z-Za 717 GetIonMass(G4lrint(Z-Zabr),G4lrint(A-Aabr));
793 G4double E = std::sqrt(pabr.mag2() + 718 G4double E = std::sqrt(pabr.mag2() + ionMass*ionMass);
794 G4LorentzVector lorentzVector = G4LorentzV 719 G4LorentzVector lorentzVector = G4LorentzVector(-pabr, E + 1.0*eV);
795 fragment = 720 fragment =
796 new G4Fragment((G4int) (A-Aabr), (G4int) 721 new G4Fragment((G4int) (A-Aabr), (G4int) (Z-Zabr), lorentzVector);
797 } 722 }
798 723
799 return fragment; 724 return fragment;
800 } 725 }
801 ////////////////////////////////////////////// 726 ////////////////////////////////////////////////////////////////////////////////
802 // 727 //
803 G4double G4WilsonAbrasionModel::GetNucleonIndu 728 G4double G4WilsonAbrasionModel::GetNucleonInducedExcitation
804 (G4double rP, G4double rT, G4double r) 729 (G4double rP, G4double rT, G4double r)
805 { 730 {
806 // 731 //
807 // 732 //
808 // Initialise variables. 733 // Initialise variables.
809 // 734 //
810 G4double Cl = 0.0; 735 G4double Cl = 0.0;
811 G4double rPsq = rP * rP; 736 G4double rPsq = rP * rP;
812 G4double rTsq = rT * rT; 737 G4double rTsq = rT * rT;
813 G4double rsq = r * r; 738 G4double rsq = r * r;
814 // 739 //
815 // 740 //
816 // Depending upon the impact parameter, a diff 741 // Depending upon the impact parameter, a different form of the chord length is
817 // is used. 742 // is used.
818 // 743 //
819 if (r > rT) Cl = 2.0*std::sqrt(rPsq + 2.0*r* 744 if (r > rT) Cl = 2.0*std::sqrt(rPsq + 2.0*r*rT - rsq - rTsq);
820 else Cl = 2.0*rP; 745 else Cl = 2.0*rP;
821 // << 746
822 // << 747 G4double bP = (rPsq+rsq-rTsq)/2.0/r;
823 // The next lines have been changed to include << 748 G4double Ct = 2.0*std::sqrt(rPsq - bP*bP);
824 // projectile and target are too close, Ct is <<
825 // Otherwise the standard Wilson algorithm sho <<
826 // PRT 20091023. <<
827 // <<
828 G4double Ct = 0.0; <<
829 if (rT > rP && rsq < rTsq - rPsq) Ct = <<
830 else if (rP > rT && rsq < rPsq - rTsq) Ct = <<
831 else { <<
832 G4double bP = (rPsq+rsq-rTsq)/2.0/r; <<
833 G4double x = rPsq - bP*bP; <<
834 if (x < 0.0) { <<
835 G4cerr <<"############################## <<
836 <<"############################## <<
837 <<G4endl; <<
838 G4cerr <<"ERROR IN G4WilsonAbrasionModel <<
839 <<G4endl; <<
840 G4cerr <<"rPsq - bP*bP < 0.0 and cannot <<
841 G4cerr <<"Set to zero instead" <<G4endl; <<
842 G4cerr <<"############################## <<
843 <<"############################## <<
844 <<G4endl; <<
845 } <<
846 Ct = 2.0*std::sqrt(x); <<
847 } <<
848 749
849 G4double Ex = 13.0 * Cl / fermi; 750 G4double Ex = 13.0 * Cl / fermi;
850 if (Ct > 1.5*fermi) 751 if (Ct > 1.5*fermi)
851 Ex += 13.0 * Cl / fermi /3.0 * (Ct/fermi - 752 Ex += 13.0 * Cl / fermi /3.0 * (Ct/fermi - 1.5);
852 753
853 return Ex; 754 return Ex;
854 } 755 }
855 ////////////////////////////////////////////// 756 ////////////////////////////////////////////////////////////////////////////////
856 // 757 //
857 void G4WilsonAbrasionModel::SetUseAblation (G4 758 void G4WilsonAbrasionModel::SetUseAblation (G4bool useAblation1)
858 { 759 {
859 if (useAblation != useAblation1) 760 if (useAblation != useAblation1)
860 { 761 {
861 useAblation = useAblation1; 762 useAblation = useAblation1;
>> 763 delete theExcitationHandler;
>> 764 delete theExcitationHandlerx;
>> 765 theExcitationHandler = new G4ExcitationHandler;
>> 766 theExcitationHandlerx = new G4ExcitationHandler;
862 if (useAblation) 767 if (useAblation)
863 { 768 {
864 theAblation = new G4WilsonAblationModel; 769 theAblation = new G4WilsonAblationModel;
865 theAblation->SetVerboseLevel(verboseLeve 770 theAblation->SetVerboseLevel(verboseLevel);
866 theExcitationHandler->SetEvaporation(the 771 theExcitationHandler->SetEvaporation(theAblation);
>> 772 theExcitationHandlerx->SetEvaporation(theAblation);
867 } 773 }
868 else 774 else
869 { 775 {
870 delete theExcitationHandler; << 776 theAblation = NULL;
871 theAblation = nullp << 777 G4Evaporation * theEvaporation = new G4Evaporation;
872 theExcitationHandler = new G4Excitation << 778 G4FermiBreakUp * theFermiBreakUp = new G4FermiBreakUp;
>> 779 G4StatMF * theMF = new G4StatMF;
>> 780 theExcitationHandler->SetEvaporation(theEvaporation);
>> 781 theExcitationHandler->SetFermiModel(theFermiBreakUp);
>> 782 theExcitationHandler->SetMultiFragmentation(theMF);
>> 783 theExcitationHandler->SetMaxAandZForFermiBreakUp(12, 6);
>> 784 theExcitationHandler->SetMinEForMultiFrag(5.0*MeV);
>> 785
>> 786 theEvaporation = new G4Evaporation;
>> 787 theFermiBreakUp = new G4FermiBreakUp;
>> 788 theExcitationHandlerx->SetEvaporation(theEvaporation);
>> 789 theExcitationHandlerx->SetFermiModel(theFermiBreakUp);
>> 790 theExcitationHandlerx->SetMaxAandZForFermiBreakUp(12, 6);
873 } 791 }
874 } 792 }
875 return; 793 return;
876 } 794 }
877 ////////////////////////////////////////////// 795 ////////////////////////////////////////////////////////////////////////////////
878 // 796 //
879 void G4WilsonAbrasionModel::PrintWelcomeMessag 797 void G4WilsonAbrasionModel::PrintWelcomeMessage ()
880 { 798 {
881 G4cout <<G4endl; 799 G4cout <<G4endl;
882 G4cout <<" ********************************* 800 G4cout <<" *****************************************************************"
883 <<G4endl; 801 <<G4endl;
884 G4cout <<" Nuclear abrasion model for nuclea 802 G4cout <<" Nuclear abrasion model for nuclear-nuclear interactions activated"
885 <<G4endl; 803 <<G4endl;
886 G4cout <<" (Written by QinetiQ Ltd for the E 804 G4cout <<" (Written by QinetiQ Ltd for the European Space Agency)"
887 <<G4endl; 805 <<G4endl;
888 G4cout <<" ********************************* 806 G4cout <<" *****************************************************************"
889 <<G4endl; 807 <<G4endl;
890 G4cout << G4endl; 808 G4cout << G4endl;
891 809
892 return; 810 return;
893 } 811 }
894 ////////////////////////////////////////////// 812 ////////////////////////////////////////////////////////////////////////////////
895 // 813 //
896 814