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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: B.2
41 // Date: 08/12/2009 << 41 // Date: 18/01/05
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 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
64 // ver 1.0 << 64 ////////////////////////////////////////////////////////////////////////////////
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 // 65 //
87 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% <<
88 ////////////////////////////////////////////// <<
89 <<
90 #include "G4WilsonAbrasionModel.hh" 66 #include "G4WilsonAbrasionModel.hh"
91 #include "G4WilsonRadius.hh" 67 #include "G4WilsonRadius.hh"
92 #include "G4NuclearAbrasionGeometry.hh" 68 #include "G4NuclearAbrasionGeometry.hh"
93 #include "G4WilsonAblationModel.hh" 69 #include "G4WilsonAblationModel.hh"
94 70
95 #include "G4PhysicalConstants.hh" <<
96 #include "G4SystemOfUnits.hh" <<
97 #include "G4ExcitationHandler.hh" 71 #include "G4ExcitationHandler.hh"
98 #include "G4Evaporation.hh" 72 #include "G4Evaporation.hh"
>> 73 #include "G4FermiBreakUp.hh"
>> 74 #include "G4StatMF.hh"
99 #include "G4ParticleDefinition.hh" 75 #include "G4ParticleDefinition.hh"
100 #include "G4DynamicParticle.hh" 76 #include "G4DynamicParticle.hh"
101 #include "Randomize.hh" 77 #include "Randomize.hh"
102 #include "G4Fragment.hh" 78 #include "G4Fragment.hh"
>> 79 #include "G4VNuclearDensity.hh"
>> 80 #include "G4NuclearShellModelDensity.hh"
>> 81 #include "G4NuclearFermiDensity.hh"
>> 82 #include "G4FermiMomentum.hh"
103 #include "G4ReactionProductVector.hh" 83 #include "G4ReactionProductVector.hh"
104 #include "G4LorentzVector.hh" 84 #include "G4LorentzVector.hh"
105 #include "G4ParticleMomentum.hh" 85 #include "G4ParticleMomentum.hh"
106 #include "G4Poisson.hh" 86 #include "G4Poisson.hh"
107 #include "G4ParticleTable.hh" 87 #include "G4ParticleTable.hh"
108 #include "G4IonTable.hh" 88 #include "G4IonTable.hh"
109 #include "globals.hh" 89 #include "globals.hh"
110 << 90 ////////////////////////////////////////////////////////////////////////////////
111 #include "G4Exp.hh" << 91 //
112 #include "G4Pow.hh" << 92 G4WilsonAbrasionModel::G4WilsonAbrasionModel (G4bool useAblation1)
113 << 93 :G4HadronicInteraction("G4WilsonAbrasion")
114 #include "G4PhysicsModelCatalog.hh" <<
115 <<
116 <<
117 G4WilsonAbrasionModel::G4WilsonAbrasionModel(G <<
118 : G4HadronicInteraction("G4WilsonAbrasion"), <<
119 { 94 {
120 // Send message to stdout to advise that the << 95 //
>> 96 //
>> 97 // Send message to stdout to advise that the G4Abrasion model is being used.
>> 98 //
121 PrintWelcomeMessage(); 99 PrintWelcomeMessage();
122 << 100 //
123 // Set the default verbose level to 0 - no o << 101 //
>> 102 // Set the default verbose level to 0 - no output.
>> 103 //
124 verboseLevel = 0; 104 verboseLevel = 0;
125 useAblation = useAblation1; 105 useAblation = useAblation1;
126 theAblation = nullptr; << 106 //
127 << 107 //
128 // No de-excitation handler has been supplie << 108 // No de-excitation handler has been supplied - define the default handler.
129 << 109 //
130 theExcitationHandler = new G4ExcitationHandl << 110 theExcitationHandler = new G4ExcitationHandler;
>> 111 theExcitationHandlerx = new G4ExcitationHandler;
131 if (useAblation) 112 if (useAblation)
132 { 113 {
133 theAblation = new G4WilsonAblationModel; 114 theAblation = new G4WilsonAblationModel;
134 theAblation->SetVerboseLevel(verboseLevel) 115 theAblation->SetVerboseLevel(verboseLevel);
135 theExcitationHandler->SetEvaporation(theAb << 116 theExcitationHandler->SetEvaporation(theAblation);
>> 117 theExcitationHandlerx->SetEvaporation(theAblation);
136 } 118 }
137 << 119 else
138 // Set the minimum and maximum range for the << 120 {
139 // this is in energy per nucleon number). << 121 theAblation = NULL;
140 << 122 G4Evaporation * theEvaporation = new G4Evaporation;
>> 123 G4FermiBreakUp * theFermiBreakUp = new G4FermiBreakUp;
>> 124 G4StatMF * theMF = new G4StatMF;
>> 125 theExcitationHandler->SetEvaporation(theEvaporation);
>> 126 theExcitationHandler->SetFermiModel(theFermiBreakUp);
>> 127 theExcitationHandler->SetMultiFragmentation(theMF);
>> 128 theExcitationHandler->SetMaxAandZForFermiBreakUp(12, 6);
>> 129 theExcitationHandler->SetMinEForMultiFrag(5.0*MeV);
>> 130
>> 131 theEvaporation = new G4Evaporation;
>> 132 theFermiBreakUp = new G4FermiBreakUp;
>> 133 theExcitationHandlerx->SetEvaporation(theEvaporation);
>> 134 theExcitationHandlerx->SetFermiModel(theFermiBreakUp);
>> 135 theExcitationHandlerx->SetMaxAandZForFermiBreakUp(12, 6);
>> 136 }
>> 137 //
>> 138 //
>> 139 // Set the minimum and maximum range for the model (despite nomanclature, this
>> 140 // is in energy per nucleon number).
>> 141 //
141 SetMinEnergy(70.0*MeV); 142 SetMinEnergy(70.0*MeV);
142 SetMaxEnergy(10.1*GeV); 143 SetMaxEnergy(10.1*GeV);
143 isBlocked = false; 144 isBlocked = false;
144 << 145 //
145 // npK, when mutiplied by the nuclear Fermi << 146 //
146 // momentum over which the secondary nucleon << 147 // npK, when mutiplied by the nuclear Fermi momentum, determines the range of
147 << 148 // momentum over which the secondary nucleon momentum is sampled.
148 r0sq = 0.0; << 149 //
149 npK = 5.0; << 150 npK = 5.0;
150 B = 10.0 * MeV; << 151 B = 10.0 * MeV;
151 third = 1.0 / 3.0; << 152 third = 1.0 / 3.0;
152 fradius = 0.99; << 153 conserveEnergy = false;
153 conserveEnergy = false; <<
154 conserveMomentum = true; 154 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 } 155 }
171 << 156 ////////////////////////////////////////////////////////////////////////////////
172 G4WilsonAbrasionModel::G4WilsonAbrasionModel(G << 157 //
173 G4HadronicInteraction("G4WilsonAbrasion"), se << 158 G4WilsonAbrasionModel::G4WilsonAbrasionModel (G4ExcitationHandler *aExcitationHandler)
174 { 159 {
>> 160 //
>> 161 //
175 // Send message to stdout to advise that the G 162 // Send message to stdout to advise that the G4Abrasion model is being used.
176 << 163 //
177 PrintWelcomeMessage(); 164 PrintWelcomeMessage();
178 << 165 //
>> 166 //
179 // Set the default verbose level to 0 - no out 167 // Set the default verbose level to 0 - no output.
180 << 168 //
181 verboseLevel = 0; 169 verboseLevel = 0;
182 << 170 //
183 theAblation = nullptr; //A.R. 26-Jul-2012 <<
184 useAblation = false; //A.R. 14-Aug-2012 <<
185 <<
186 // 171 //
187 // The user is able to provide the excitation 172 // The user is able to provide the excitation handler as well as an argument
188 // which is provided in this instantiation is 173 // which is provided in this instantiation is used to determine
189 // whether the spectators of the interaction a 174 // whether the spectators of the interaction are free following the abrasion.
190 // 175 //
191 theExcitationHandler = aExcitationHandler; << 176 theExcitationHandler = aExcitationHandler;
>> 177 theExcitationHandlerx = new G4ExcitationHandler;
>> 178 G4Evaporation * theEvaporation = new G4Evaporation;
>> 179 G4FermiBreakUp * theFermiBreakUp = new G4FermiBreakUp;
>> 180 theExcitationHandlerx->SetEvaporation(theEvaporation);
>> 181 theExcitationHandlerx->SetFermiModel(theFermiBreakUp);
>> 182 theExcitationHandlerx->SetMaxAandZForFermiBreakUp(12, 6);
192 // 183 //
193 // 184 //
194 // Set the minimum and maximum range for the m 185 // Set the minimum and maximum range for the model (despite nomanclature, this
195 // is in energy per nucleon number). 186 // is in energy per nucleon number).
196 // 187 //
197 SetMinEnergy(70.0*MeV); 188 SetMinEnergy(70.0*MeV);
198 SetMaxEnergy(10.1*GeV); 189 SetMaxEnergy(10.1*GeV);
199 isBlocked = false; 190 isBlocked = false;
200 // 191 //
201 // 192 //
202 // npK, when mutiplied by the nuclear Fermi mo 193 // npK, when mutiplied by the nuclear Fermi momentum, determines the range of
203 // momentum over which the secondary nucleon m 194 // momentum over which the secondary nucleon momentum is sampled.
204 // 195 //
205 r0sq = 0.0; <<
206 npK = 5.0; 196 npK = 5.0;
207 B = 10.0 * MeV; 197 B = 10.0 * MeV;
208 third = 1.0 / 3.0; 198 third = 1.0 / 3.0;
209 fradius = 0.99; <<
210 conserveEnergy = false; 199 conserveEnergy = false;
211 conserveMomentum = true; 200 conserveMomentum = true;
212 <<
213 // Creator model ID for the secondaries crea <<
214 secID = G4PhysicsModelCatalog::GetModelID( " <<
215 } 201 }
216 ////////////////////////////////////////////// 202 ////////////////////////////////////////////////////////////////////////////////
217 // 203 //
218 G4WilsonAbrasionModel::~G4WilsonAbrasionModel( << 204 G4WilsonAbrasionModel::~G4WilsonAbrasionModel ()
219 { 205 {
>> 206 //
>> 207 //
>> 208 // The destructor doesn't have to do a great deal!
>> 209 //
220 delete theExcitationHandler; 210 delete theExcitationHandler;
>> 211 delete theExcitationHandlerx;
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.GetN();
246 G4double ZT = theTarget.GetZ_asInt(); << 237 G4double ZT = theTarget.GetZ();
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 = NULL;
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 while (Dabr == 0)
300 const G4int maxNumberOfLoops = 1000; <<
301 G4int loopCounter = -1; <<
302 while (Dabr == 0 && ++loopCounter < maxNumbe <<
303 { 291 {
>> 292 // Added by MHM 20050119 to fix leaking memory on second pass through this loop
>> 293 if (theAbrasionGeometry)
>> 294 {
>> 295 delete theAbrasionGeometry;
>> 296 theAbrasionGeometry = NULL;
>> 297 }
304 // 298 //
305 // 299 //
306 // Sample the impact parameter. For the momen 300 // Sample the impact parameter. For the moment, this class takes account of
307 // electrostatic effects on the impact paramet 301 // electrostatic effects on the impact parameter, but (like HZETRN AND NUCFRG2)
308 // does not make any correction for the effect 302 // does not make any correction for the effects of nuclear-nuclear repulsion.
309 // 303 //
310 G4double rPT = rP + rT; 304 G4double rPT = rP + rT;
311 G4double rPTsq = rPT * rPT; 305 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; 306 r = 1.1 * rPT;
329 while (r > rPT && ++evtcnt < 1000) /* Loo << 307 while (r > rPT)
330 { 308 {
331 G4double bsq = rPTsq * G4UniformRand(); 309 G4double bsq = rPTsq * G4UniformRand();
332 r = (rm + std::sqrt(rm*rm + 4 310 r = (rm + std::sqrt(rm*rm + 4.0*bsq)) / 2.0;
333 } 311 }
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; 312 rsq = r * r;
343 // 313 //
344 // 314 //
345 // Now determine the chord-length through the 315 // Now determine the chord-length through the target nucleus.
346 // 316 //
347 if (rT > rP) 317 if (rT > rP)
348 { 318 {
349 G4double x = (rPsq + rsq - rTsq) / 2.0 / 319 G4double x = (rPsq + rsq - rTsq) / 2.0 / r;
350 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - 320 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - x*x);
351 else CT = 2.0 * std::sqrt(rTsq - 321 else CT = 2.0 * std::sqrt(rTsq - rsq);
352 } 322 }
353 else 323 else
354 { 324 {
355 G4double x = (rTsq + rsq - rPsq) / 2.0 / 325 G4double x = (rTsq + rsq - rPsq) / 2.0 / r;
356 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - 326 if (x > 0.0) CT = 2.0 * std::sqrt(rTsq - x*x);
357 else CT = 2.0 * rT; 327 else CT = 2.0 * rT;
358 } 328 }
359 // 329 //
360 // 330 //
361 // Determine the number of abraded nucleons. 331 // Determine the number of abraded nucleons. Note that the mean number of
362 // abraded nucleons is used to sample the Pois 332 // abraded nucleons is used to sample the Poisson distribution. The Poisson
363 // distribution is sampled only ten times with 333 // distribution is sampled only ten times with the current impact parameter,
364 // and if it fails after this to find a case f 334 // 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 335 // nucleons >1, the impact parameter is re-sampled.
366 // 336 //
367 delete theAbrasionGeometry; <<
368 theAbrasionGeometry = new G4NuclearAbrasio 337 theAbrasionGeometry = new G4NuclearAbrasionGeometry(AP,AT,r);
369 F = theAbrasionGeometry- 338 F = theAbrasionGeometry->F();
370 G4double lambda = 16.6*fermi / G4Pow:: << 339 G4double lambda = 16.6*fermi / std::pow(E/MeV,0.26);
371 G4double Mabr = F * AP * (1.0 - G4Ex << 340 G4double Mabr = F * AP * (1.0 - std::exp(-CT/lambda));
372 G4long n = 0; 341 G4long n = 0;
373 for (G4int i = 0; i<10; ++i) << 342 for (G4int i = 0; i<10; i++)
374 { 343 {
375 n = G4Poisson(Mabr); 344 n = G4Poisson(Mabr);
376 if (n > 0) 345 if (n > 0)
377 { 346 {
378 if (n>AP) Dabr = (G4int) AP; 347 if (n>AP) Dabr = (G4int) AP;
379 else Dabr = (G4int) n; 348 else Dabr = (G4int) n;
380 break; 349 break;
381 } 350 }
382 } 351 }
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 } 352 }
400 <<
401 if (verboseLevel >= 2) 353 if (verboseLevel >= 2)
402 { 354 {
403 G4cout <<G4endl; 355 G4cout <<G4endl;
404 G4cout <<"Impact parameter = " <<r/ferm 356 G4cout <<"Impact parameter = " <<r/fermi <<" fm" <<G4endl;
405 G4cout <<"# Abraded nucleons = " <<Dabr < 357 G4cout <<"# Abraded nucleons = " <<Dabr <<G4endl;
406 } 358 }
407 // 359 //
408 // 360 //
409 // The number of abraded nucleons must be no g 361 // The number of abraded nucleons must be no greater than the number of
410 // nucleons in either the projectile or the ta 362 // nucleons in either the projectile or the target. If AP - Dabr < 2 or
411 // AT - Dabr < 2 then either we have only a nu 363 // AT - Dabr < 2 then either we have only a nucleon left behind in the
412 // projectile/target or we've tried to abrade 364 // projectile/target or we've tried to abrade too many nucleons - and Dabr
413 // should be limited. 365 // should be limited.
414 // 366 //
415 if (AP - (G4double) Dabr < 2.0) Dabr = (G4in 367 if (AP - (G4double) Dabr < 2.0) Dabr = (G4int) AP;
416 if (AT - (G4double) Dabr < 2.0) Dabr = (G4in 368 if (AT - (G4double) Dabr < 2.0) Dabr = (G4int) AT;
417 // 369 //
418 // 370 //
419 // Determine the abraded secondary nucleons fr 371 // Determine the abraded secondary nucleons from the projectile. *fragmentP
420 // is a pointer to the prefragment from the pr 372 // is a pointer to the prefragment from the projectile and nSecP is the number
421 // of nucleons in theParticleChange which have 373 // of nucleons in theParticleChange which have been abraded. The total energy
422 // from these is determined. 374 // from these is determined.
423 // 375 //
424 G4ThreeVector boost = pP.findBoostToCM(); 376 G4ThreeVector boost = pP.findBoostToCM();
425 G4Fragment *fragmentP = GetAbradedNucleons ( 377 G4Fragment *fragmentP = GetAbradedNucleons (Dabr, AP, ZP, rP);
426 G4int nSecP = (G4int)theParticleCh << 378 G4int nSecP = theParticleChange.GetNumberOfSecondaries();
427 G4int i = 0; 379 G4int i = 0;
428 for (i=0; i<nSecP; ++i) << 380 for (i=0; i<nSecP; i++)
429 { 381 {
430 TotalEPost += theParticleChange.GetSeconda 382 TotalEPost += theParticleChange.GetSecondary(i)->
431 GetParticle()->GetTotalEnergy(); 383 GetParticle()->GetTotalEnergy();
432 } 384 }
433 // 385 //
434 // 386 //
435 // Determine the number of spectators in the i 387 // Determine the number of spectators in the interaction region for the
436 // projectile. 388 // projectile.
437 // 389 //
438 G4int DspcP = (G4int) (AP*F) - Dabr; 390 G4int DspcP = (G4int) (AP*F) - Dabr;
439 if (DspcP <= 0) DspcP = 0; 391 if (DspcP <= 0) DspcP = 0;
440 else if (DspcP > AP-Dabr) DspcP = ((G4int) A 392 else if (DspcP > AP-Dabr) DspcP = ((G4int) AP) - Dabr;
441 // 393 //
442 // 394 //
443 // Determine excitation energy associated with 395 // Determine excitation energy associated with excess surface area of the
444 // projectile (EsP) and the excitation due to 396 // projectile (EsP) and the excitation due to scattering of nucleons which are
445 // retained within the projectile (ExP). Add 397 // retained within the projectile (ExP). Add the total energy from the excited
446 // nucleus to the total energy of the secondar 398 // nucleus to the total energy of the secondaries.
447 // 399 //
448 G4bool excitationAbsorbedByProjectile = fals 400 G4bool excitationAbsorbedByProjectile = false;
449 if (fragmentP != nullptr) << 401 if (fragmentP != NULL)
450 { 402 {
451 G4double EsP = theAbrasionGeometry->GetExc 403 G4double EsP = theAbrasionGeometry->GetExcitationEnergyOfProjectile();
452 G4double ExP = 0.0; 404 G4double ExP = 0.0;
453 if (Dabr < AT) 405 if (Dabr < AT)
454 excitationAbsorbedByProjectile = G4Unifo 406 excitationAbsorbedByProjectile = G4UniformRand() < 0.5;
455 if (excitationAbsorbedByProjectile) 407 if (excitationAbsorbedByProjectile)
456 ExP = GetNucleonInducedExcitation(rP, rT 408 ExP = GetNucleonInducedExcitation(rP, rT, r);
457 G4double xP = EsP + ExP; 409 G4double xP = EsP + ExP;
458 if (xP > B*(AP-Dabr)) xP = B*(AP-Dabr); 410 if (xP > B*(AP-Dabr)) xP = B*(AP-Dabr);
459 G4LorentzVector lorentzVector = fragmentP- 411 G4LorentzVector lorentzVector = fragmentP->GetMomentum();
460 lorentzVector.setE(lorentzVector.e()+xP); 412 lorentzVector.setE(lorentzVector.e()+xP);
461 fragmentP->SetMomentum(lorentzVector); 413 fragmentP->SetMomentum(lorentzVector);
462 TotalEPost += lorentzVector.e(); 414 TotalEPost += lorentzVector.e();
463 } 415 }
464 G4double EMassP = TotalEPost; 416 G4double EMassP = TotalEPost;
465 // 417 //
466 // 418 //
467 // Determine the abraded secondary nucleons fr 419 // Determine the abraded secondary nucleons from the target. Note that it's
468 // assumed that the same number of nucleons ar 420 // assumed that the same number of nucleons are abraded from the target as for
469 // the projectile, and obviously no boost is a 421 // the projectile, and obviously no boost is applied to the products. *fragmentT
470 // is a pointer to the prefragment from the ta 422 // is a pointer to the prefragment from the target and nSec is the total number
471 // of nucleons in theParticleChange which have 423 // of nucleons in theParticleChange which have been abraded. The total energy
472 // from these is determined. 424 // from these is determined.
473 // 425 //
474 G4Fragment *fragmentT = GetAbradedNucleons ( 426 G4Fragment *fragmentT = GetAbradedNucleons (Dabr, AT, ZT, rT);
475 G4int nSec = (G4int)theParticleChange.GetNum << 427 G4int nSec = theParticleChange.GetNumberOfSecondaries();
476 for (i=nSecP; i<nSec; ++i) << 428 for (i=nSecP; i<nSec; i++)
477 { 429 {
478 TotalEPost += theParticleChange.GetSeconda 430 TotalEPost += theParticleChange.GetSecondary(i)->
479 GetParticle()->GetTotalEnergy(); 431 GetParticle()->GetTotalEnergy();
480 } 432 }
481 // 433 //
482 // 434 //
483 // Determine the number of spectators in the i 435 // Determine the number of spectators in the interaction region for the
484 // target. 436 // target.
485 // 437 //
486 G4int DspcT = (G4int) (AT*F) - Dabr; 438 G4int DspcT = (G4int) (AT*F) - Dabr;
487 if (DspcT <= 0) DspcT = 0; 439 if (DspcT <= 0) DspcT = 0;
488 else if (DspcT > AP-Dabr) DspcT = ((G4int) A 440 else if (DspcT > AP-Dabr) DspcT = ((G4int) AT) - Dabr;
489 // 441 //
490 // 442 //
491 // Determine excitation energy associated with 443 // Determine excitation energy associated with excess surface area of the
492 // target (EsT) and the excitation due to scat 444 // target (EsT) and the excitation due to scattering of nucleons which are
493 // retained within the target (ExT). Add the 445 // retained within the target (ExT). Add the total energy from the excited
494 // nucleus to the total energy of the secondar 446 // nucleus to the total energy of the secondaries.
495 // 447 //
496 if (fragmentT != nullptr) << 448 if (fragmentT != NULL)
497 { 449 {
498 G4double EsT = theAbrasionGeometry->GetExc 450 G4double EsT = theAbrasionGeometry->GetExcitationEnergyOfTarget();
499 G4double ExT = 0.0; 451 G4double ExT = 0.0;
500 if (!excitationAbsorbedByProjectile) 452 if (!excitationAbsorbedByProjectile)
501 ExT = GetNucleonInducedExcitation(rT, rP 453 ExT = GetNucleonInducedExcitation(rT, rP, r);
502 G4double xT = EsT + ExT; 454 G4double xT = EsT + ExT;
503 if (xT > B*(AT-Dabr)) xT = B*(AT-Dabr); 455 if (xT > B*(AT-Dabr)) xT = B*(AT-Dabr);
504 G4LorentzVector lorentzVector = fragmentT- 456 G4LorentzVector lorentzVector = fragmentT->GetMomentum();
505 lorentzVector.setE(lorentzVector.e()+xT); 457 lorentzVector.setE(lorentzVector.e()+xT);
506 fragmentT->SetMomentum(lorentzVector); 458 fragmentT->SetMomentum(lorentzVector);
507 TotalEPost += lorentzVector.e(); 459 TotalEPost += lorentzVector.e();
508 } 460 }
509 // 461 //
510 // 462 //
511 // Now determine the difference between the pr 463 // Now determine the difference between the pre and post interaction
512 // energy - this will be used to determine the 464 // energy - this will be used to determine the Lorentz boost if conservation
513 // of energy is to be imposed/attempted. 465 // of energy is to be imposed/attempted.
514 // 466 //
515 G4double deltaE = TotalEPre - TotalEPost; 467 G4double deltaE = TotalEPre - TotalEPost;
516 if (deltaE > 0.0 && conserveEnergy) 468 if (deltaE > 0.0 && conserveEnergy)
517 { 469 {
518 G4double beta = std::sqrt(1.0 - EMassP*EMa << 470 G4double beta = std::sqrt(1.0 - EMassP*EMassP/std::pow(deltaE+EMassP,2.0));
519 boost = boost / boost.mag() * beta; 471 boost = boost / boost.mag() * beta;
520 } 472 }
521 // 473 //
522 // 474 //
523 // Now boost the secondaries from the projecti 475 // Now boost the secondaries from the projectile.
524 // 476 //
525 G4ThreeVector pBalance = pP.vect(); 477 G4ThreeVector pBalance = pP.vect();
526 for (i=0; i<nSecP; ++i) << 478 for (i=0; i<nSecP; i++)
527 { 479 {
528 G4DynamicParticle *dynamicP = theParticleC 480 G4DynamicParticle *dynamicP = theParticleChange.GetSecondary(i)->
529 GetParticle(); 481 GetParticle();
530 G4LorentzVector lorentzVector = dynamicP-> 482 G4LorentzVector lorentzVector = dynamicP->Get4Momentum();
531 lorentzVector.boost(-boost); 483 lorentzVector.boost(-boost);
532 dynamicP->Set4Momentum(lorentzVector); 484 dynamicP->Set4Momentum(lorentzVector);
533 pBalance -= lorentzVector.vect(); 485 pBalance -= lorentzVector.vect();
534 } 486 }
535 // 487 //
536 // 488 //
537 // Set the boost for the projectile prefragmen 489 // Set the boost for the projectile prefragment. This is now based on the
538 // conservation of momentum. However, if the 490 // conservation of momentum. However, if the user selected momentum of the
539 // prefragment is not to be conserved this sim 491 // prefragment is not to be conserved this simply boosted to the velocity of the
540 // original projectile times the ratio of the 492 // original projectile times the ratio of the unexcited to the excited mass
541 // of the prefragment (the excitation increase 493 // of the prefragment (the excitation increases the effective mass of the
542 // prefragment, and therefore modifying the bo 494 // prefragment, and therefore modifying the boost is an attempt to prevent
543 // the momentum of the prefragment being exces 495 // the momentum of the prefragment being excessive).
544 // 496 //
545 if (fragmentP != nullptr) << 497 if (fragmentP != NULL)
546 { 498 {
547 G4LorentzVector lorentzVector = fragmentP- 499 G4LorentzVector lorentzVector = fragmentP->GetMomentum();
548 G4double fragmentM = lorentzVec << 500 G4double m = lorentzVector.m();
549 if (conserveMomentum) 501 if (conserveMomentum)
550 fragmentP->SetMomentum 502 fragmentP->SetMomentum
551 (G4LorentzVector(pBalance,std::sqrt(pB << 503 (G4LorentzVector(pBalance,std::sqrt(pBalance.mag2()+m*m+1.0*eV*eV)));
552 else 504 else
553 { 505 {
554 G4double fragmentGroundStateM = fragment << 506 G4double mg = fragmentP->GetGroundStateMass();
555 fragmentP->SetMomentum(lorentzVector.boo << 507 fragmentP->SetMomentum(lorentzVector.boost(-boost * mg/m));
556 } 508 }
557 } 509 }
558 // 510 //
559 // 511 //
560 // Output information to user if verbose infor 512 // Output information to user if verbose information requested.
561 // 513 //
562 if (verboseLevel >= 2) 514 if (verboseLevel >= 2)
563 { 515 {
564 G4cout <<G4endl; 516 G4cout <<G4endl;
565 G4cout <<"-------------------------------- 517 G4cout <<"-----------------------------------" <<G4endl;
566 G4cout <<"Secondary nucleons from projecti 518 G4cout <<"Secondary nucleons from projectile:" <<G4endl;
567 G4cout <<"-------------------------------- 519 G4cout <<"-----------------------------------" <<G4endl;
568 G4cout.precision(7); 520 G4cout.precision(7);
569 for (i=0; i<nSecP; ++i) << 521 for (i=0; i<nSecP; i++)
570 { 522 {
571 G4cout <<"Particle # " <<i <<G4endl; 523 G4cout <<"Particle # " <<i <<G4endl;
572 theParticleChange.GetSecondary(i)->GetPa 524 theParticleChange.GetSecondary(i)->GetParticle()->DumpInfo();
573 G4DynamicParticle *dyn = theParticleChan 525 G4DynamicParticle *dyn = theParticleChange.GetSecondary(i)->GetParticle();
574 G4cout <<"New nucleon (P) " <<dyn->GetDe 526 G4cout <<"New nucleon (P) " <<dyn->GetDefinition()->GetParticleName()
575 <<" : " <<dyn->Get4M 527 <<" : " <<dyn->Get4Momentum()
576 <<G4endl; 528 <<G4endl;
577 } 529 }
578 G4cout <<"---------------------------" <<G 530 G4cout <<"---------------------------" <<G4endl;
579 G4cout <<"The projectile prefragment:" <<G 531 G4cout <<"The projectile prefragment:" <<G4endl;
580 G4cout <<"---------------------------" <<G 532 G4cout <<"---------------------------" <<G4endl;
581 if (fragmentP != nullptr) << 533 if (fragmentP != NULL)
582 G4cout <<*fragmentP <<G4endl; 534 G4cout <<*fragmentP <<G4endl;
583 else 535 else
584 G4cout <<"(No residual prefragment)" <<G 536 G4cout <<"(No residual prefragment)" <<G4endl;
585 G4cout <<G4endl; 537 G4cout <<G4endl;
586 G4cout <<"-------------------------------" 538 G4cout <<"-------------------------------" <<G4endl;
587 G4cout <<"Secondary nucleons from target:" 539 G4cout <<"Secondary nucleons from target:" <<G4endl;
588 G4cout <<"-------------------------------" 540 G4cout <<"-------------------------------" <<G4endl;
589 G4cout.precision(7); 541 G4cout.precision(7);
590 for (i=nSecP; i<nSec; ++i) << 542 for (i=nSecP; i<nSec; i++)
591 { 543 {
592 G4cout <<"Particle # " <<i <<G4endl; 544 G4cout <<"Particle # " <<i <<G4endl;
593 theParticleChange.GetSecondary(i)->GetPa 545 theParticleChange.GetSecondary(i)->GetParticle()->DumpInfo();
594 G4DynamicParticle *dyn = theParticleChan 546 G4DynamicParticle *dyn = theParticleChange.GetSecondary(i)->GetParticle();
595 G4cout <<"New nucleon (T) " <<dyn->GetDe 547 G4cout <<"New nucleon (T) " <<dyn->GetDefinition()->GetParticleName()
596 <<" : " <<dyn->Get4M 548 <<" : " <<dyn->Get4Momentum()
597 <<G4endl; 549 <<G4endl;
598 } 550 }
599 G4cout <<"-----------------------" <<G4end 551 G4cout <<"-----------------------" <<G4endl;
600 G4cout <<"The target prefragment:" <<G4end 552 G4cout <<"The target prefragment:" <<G4endl;
601 G4cout <<"-----------------------" <<G4end 553 G4cout <<"-----------------------" <<G4endl;
602 if (fragmentT != nullptr) << 554 if (fragmentT != NULL)
603 G4cout <<*fragmentT <<G4endl; 555 G4cout <<*fragmentT <<G4endl;
604 else 556 else
605 G4cout <<"(No residual prefragment)" <<G 557 G4cout <<"(No residual prefragment)" <<G4endl;
606 } 558 }
607 // 559 //
608 // 560 //
609 // Now we can decay the nuclear fragments if p 561 // Now we can decay the nuclear fragments if present. The secondaries are
610 // collected and boosted as well. This is per 562 // collected and boosted as well. This is performed first for the projectile...
611 // 563 //
612 if (fragmentP !=nullptr) << 564 if (fragmentP !=NULL)
613 { 565 {
614 G4ReactionProductVector *products = nullpt << 566 G4ReactionProductVector *products = NULL;
615 // if (fragmentP->GetZ_asInt() != fragm << 567 if (fragmentP->GetZ() != fragmentP->GetA())
616 products = theExcitationHandler->BreakItUp << 568 products = theExcitationHandler->BreakItUp(*fragmentP);
617 // else << 569 else
618 // products = theExcitationHandlerx->Bre << 570 products = theExcitationHandlerx->BreakItUp(*fragmentP);
619 delete fragmentP; 571 delete fragmentP;
620 fragmentP = nullptr; << 572 fragmentP = NULL;
621 573
622 G4ReactionProductVector::iterator iter; 574 G4ReactionProductVector::iterator iter;
623 for (iter = products->begin(); iter != pro 575 for (iter = products->begin(); iter != products->end(); ++iter)
624 { 576 {
625 G4DynamicParticle *secondary = 577 G4DynamicParticle *secondary =
626 new G4DynamicParticle((*iter)->GetDefi 578 new G4DynamicParticle((*iter)->GetDefinition(),
627 (*iter)->GetTotalEnergy(), (*iter)->Ge 579 (*iter)->GetTotalEnergy(), (*iter)->GetMomentum());
628 theParticleChange.AddSecondary (secondar << 580 theParticleChange.AddSecondary (secondary); // Added MHM 20050118
629 G4String particleName = (*iter)->GetDefi 581 G4String particleName = (*iter)->GetDefinition()->GetParticleName();
630 delete (*iter); // get rid of leftover p << 582 delete (*iter); // get rid of leftover particle def! // Added MHM 20050118
631 if (verboseLevel >= 2 && particleName.fi 583 if (verboseLevel >= 2 && particleName.find("[",0) < particleName.size())
632 { 584 {
633 G4cout <<"------------------------" << 585 G4cout <<"------------------------" <<G4endl;
634 G4cout <<"The projectile fragment:" << 586 G4cout <<"The projectile fragment:" <<G4endl;
635 G4cout <<"------------------------" << 587 G4cout <<"------------------------" <<G4endl;
636 G4cout <<" fragmentP = " <<particleNam 588 G4cout <<" fragmentP = " <<particleName
637 <<" Energy = " <<secondary-> 589 <<" Energy = " <<secondary->GetKineticEnergy()
638 <<G4endl; 590 <<G4endl;
639 } 591 }
640 } 592 }
641 delete products; << 593 delete products; // Added MHM 20050118
642 } 594 }
643 // 595 //
644 // 596 //
645 // Now decay the target nucleus - no boost is 597 // Now decay the target nucleus - no boost is applied since in this
646 // approximation it is assumed that there is n 598 // approximation it is assumed that there is negligible momentum transfer from
647 // the projectile. 599 // the projectile.
648 // 600 //
649 if (fragmentT != nullptr) << 601 if (fragmentT != NULL)
650 { 602 {
651 G4ReactionProductVector *products = nullpt << 603 G4ReactionProductVector *products = NULL;
652 // if (fragmentT->GetZ_asInt() != fragm << 604 if (fragmentT->GetZ() != fragmentT->GetA())
653 products = theExcitationHandler->BreakIt 605 products = theExcitationHandler->BreakItUp(*fragmentT);
654 // else << 606 else
655 // products = theExcitationHandlerx->Bre << 607 products = theExcitationHandlerx->BreakItUp(*fragmentT);
656 // delete fragmentT; << 608 delete fragmentT;
657 fragmentT = nullptr; << 609 fragmentT = NULL;
658 610
659 G4ReactionProductVector::iterator iter; 611 G4ReactionProductVector::iterator iter;
660 for (iter = products->begin(); iter != pro 612 for (iter = products->begin(); iter != products->end(); ++iter)
661 { 613 {
662 G4DynamicParticle *secondary = 614 G4DynamicParticle *secondary =
663 new G4DynamicParticle((*iter)->GetDefi 615 new G4DynamicParticle((*iter)->GetDefinition(),
664 (*iter)->GetTotalEnergy(), (*iter)->Ge 616 (*iter)->GetTotalEnergy(), (*iter)->GetMomentum());
665 theParticleChange.AddSecondary (secondar << 617 theParticleChange.AddSecondary (secondary);
666 G4String particleName = (*iter)->GetDefi 618 G4String particleName = (*iter)->GetDefinition()->GetParticleName();
667 delete (*iter); // get rid of leftover p << 619 delete (*iter); // get rid of leftover particle def! // Added MHM 20050118
668 if (verboseLevel >= 2 && particleName.fi 620 if (verboseLevel >= 2 && particleName.find("[",0) < particleName.size())
669 { 621 {
670 G4cout <<"--------------------" <<G4en 622 G4cout <<"--------------------" <<G4endl;
671 G4cout <<"The target fragment:" <<G4en 623 G4cout <<"The target fragment:" <<G4endl;
672 G4cout <<"--------------------" <<G4en 624 G4cout <<"--------------------" <<G4endl;
673 G4cout <<" fragmentT = " <<particleNam 625 G4cout <<" fragmentT = " <<particleName
674 <<" Energy = " <<secondary-> 626 <<" Energy = " <<secondary->GetKineticEnergy()
675 <<G4endl; 627 <<G4endl;
676 } 628 }
677 } 629 }
678 delete products; << 630 delete products; // Added MHM 20050118
679 } 631 }
680 632
681 if (verboseLevel >= 2) 633 if (verboseLevel >= 2)
682 G4cout <<"############################### 634 G4cout <<"########################################"
683 <<"############################### 635 <<"########################################"
684 <<G4endl; 636 <<G4endl;
685 637
686 delete theAbrasionGeometry; 638 delete theAbrasionGeometry;
>> 639
687 return &theParticleChange; 640 return &theParticleChange;
688 } 641 }
689 ////////////////////////////////////////////// 642 ////////////////////////////////////////////////////////////////////////////////
690 // 643 //
691 G4Fragment *G4WilsonAbrasionModel::GetAbradedN 644 G4Fragment *G4WilsonAbrasionModel::GetAbradedNucleons (G4int Dabr, G4double A,
692 G4double Z, G4double r) 645 G4double Z, G4double r)
693 { 646 {
694 // 647 //
695 // 648 //
696 // Initialise variables. tau is the Fermi rad 649 // Initialise variables. tau is the Fermi radius of the nucleus. The variables
697 // p..., C... and gamma are used to help sampl << 650 // p..., C... and g(amma) are used to help sample the secondary nucleon
698 // spectrum. 651 // spectrum.
699 // 652 //
700 653
701 G4double pK = hbarc * G4Pow::GetInstance() << 654 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 << 655 if (A <= 24.0) pK *= -0.229*std::pow(A,third) + 1.62;
703 G4double pKsq = pK * pK; 656 G4double pKsq = pK * pK;
704 G4double p1sq = 2.0/5.0 * pKsq; 657 G4double p1sq = 2.0/5.0 * pKsq;
705 G4double p2sq = 6.0/5.0 * pKsq; 658 G4double p2sq = 6.0/5.0 * pKsq;
706 G4double p3sq = 500.0 * 500.0; 659 G4double p3sq = 500.0 * 500.0;
707 G4double C1 = 1.0; 660 G4double C1 = 1.0;
708 G4double C2 = 0.03; 661 G4double C2 = 0.03;
709 G4double C3 = 0.0002; 662 G4double C3 = 0.0002;
710 G4double gamma = 90.0 * MeV; << 663 G4double g = 90.0 * MeV;
711 G4double maxn = C1 + C2 + C3; 664 G4double maxn = C1 + C2 + C3;
712 // 665 //
713 // 666 //
714 // initialise the number of secondary nucleons 667 // initialise the number of secondary nucleons abraded to zero, and initially set
715 // the type of nucleon abraded to proton ... j 668 // the type of nucleon abraded to proton ... just for now.
716 // 669 //
717 G4double Aabr = 0.0; 670 G4double Aabr = 0.0;
718 G4double Zabr = 0.0; 671 G4double Zabr = 0.0;
719 G4ParticleDefinition *typeNucleon = G4Proton 672 G4ParticleDefinition *typeNucleon = G4Proton::ProtonDefinition();
720 G4DynamicParticle *dynamicNucleon = nullptr; << 673 G4DynamicParticle *dynamicNucleon = NULL;
721 G4ParticleMomentum pabr(0.0, 0.0, 0.0); 674 G4ParticleMomentum pabr(0.0, 0.0, 0.0);
722 // 675 //
723 // 676 //
724 // Now go through each abraded nucleon and sam 677 // Now go through each abraded nucleon and sample type, spectrum and angle.
725 // 678 //
726 G4bool isForLoopExitAnticipated = false; << 679 for (G4int i=0; i<Dabr; i++)
727 for (G4int i=0; i<Dabr; ++i) <<
728 { 680 {
729 // 681 //
730 // 682 //
731 // Sample the nucleon momentum distribution by 683 // Sample the nucleon momentum distribution by simple rejection techniques. We
732 // reject values of p == 0.0 since this causes 684 // reject values of p == 0.0 since this causes bad behaviour in the sinh term.
733 // 685 //
734 G4double p = 0.0; 686 G4double p = 0.0;
735 G4bool found = false; 687 G4bool found = false;
736 const G4int maxNumberOfLoops = 100000; << 688 while (!found)
737 G4int loopCounter = -1; <<
738 while (!found && ++loopCounter < maxNumber <<
739 { 689 {
740 while (p <= 0.0) p = npK * pK * G4Unifor << 690 while (p <= 0.0) p = npK * pK * G4UniformRand();
741 G4double psq = p * p; 691 G4double psq = p * p;
742 found = maxn * G4UniformRand() < C1*G4Ex << 692 found = maxn * G4UniformRand() < C1*std::exp(-psq/p1sq/2.0) +
743 C2*G4Exp(-psq/p2sq/2.0) + C3*G4Exp(-ps << 693 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 } 694 }
750 // 695 //
751 // 696 //
752 // Determine the type of particle abraded. Ca 697 // Determine the type of particle abraded. Can only be proton or neutron,
753 // and the probability is determine to be prop 698 // and the probability is determine to be proportional to the ratio as found
754 // in the nucleus at each stage. 699 // in the nucleus at each stage.
755 // 700 //
756 G4double prob = (Z-Zabr)/(A-Aabr); 701 G4double prob = (Z-Zabr)/(A-Aabr);
757 if (G4UniformRand()<prob) 702 if (G4UniformRand()<prob)
758 { 703 {
759 Zabr++; 704 Zabr++;
760 typeNucleon = G4Proton::ProtonDefinition 705 typeNucleon = G4Proton::ProtonDefinition();
761 } 706 }
762 else 707 else
763 typeNucleon = G4Neutron::NeutronDefiniti 708 typeNucleon = G4Neutron::NeutronDefinition();
764 Aabr++; 709 Aabr++;
765 // 710 //
766 // 711 //
767 // The angular distribution of the secondary n 712 // The angular distribution of the secondary nucleons is approximated to an
768 // isotropic distribution in the rest frame of 713 // isotropic distribution in the rest frame of the nucleus (this will be Lorentz
769 // boosted later. 714 // boosted later.
770 // 715 //
771 G4double costheta = 2.*G4UniformRand()-1.0 716 G4double costheta = 2.*G4UniformRand()-1.0;
772 G4double sintheta = std::sqrt((1.0 - costh 717 G4double sintheta = std::sqrt((1.0 - costheta)*(1.0 + costheta));
773 G4double phi = 2.0*pi*G4UniformRand() 718 G4double phi = 2.0*pi*G4UniformRand()*rad;
774 G4ThreeVector direction(sintheta*std::cos( 719 G4ThreeVector direction(sintheta*std::cos(phi),sintheta*std::sin(phi),costheta);
775 G4double nucleonMass = typeNucleon->GetPDG 720 G4double nucleonMass = typeNucleon->GetPDGMass();
776 G4double E = std::sqrt(p*p + nuc 721 G4double E = std::sqrt(p*p + nucleonMass*nucleonMass)-nucleonMass;
777 dynamicNucleon = new G4DynamicParticle(typ 722 dynamicNucleon = new G4DynamicParticle(typeNucleon,direction,E);
778 theParticleChange.AddSecondary (dynamicNuc << 723 theParticleChange.AddSecondary (dynamicNucleon);
779 pabr += p*direction; 724 pabr += p*direction;
780 } 725 }
781 // 726 //
782 // 727 //
783 // Next determine the details of the nuclear p 728 // Next determine the details of the nuclear prefragment .. that is if there
784 // is one or more protons in the residue. (No 729 // 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 730 // energy is a safety factor to avoid any possibility of negative rest mass
786 // energy.) 731 // energy.)
787 // 732 //
788 G4Fragment *fragment = nullptr; << 733 G4Fragment *fragment = NULL;
789 if ( ! isForLoopExitAnticipated && Z-Zabr>=1 << 734 if (Z-Zabr>=1.0)
790 { 735 {
791 G4double ionMass = G4ParticleTable::GetPar 736 G4double ionMass = G4ParticleTable::GetParticleTable()->GetIonTable()->
792 GetIonMass(G4lrint(Z-Za 737 GetIonMass(G4lrint(Z-Zabr),G4lrint(A-Aabr));
793 G4double E = std::sqrt(pabr.mag2() + 738 G4double E = std::sqrt(pabr.mag2() + ionMass*ionMass);
794 G4LorentzVector lorentzVector = G4LorentzV 739 G4LorentzVector lorentzVector = G4LorentzVector(-pabr, E + 1.0*eV);
795 fragment = 740 fragment =
796 new G4Fragment((G4int) (A-Aabr), (G4int) 741 new G4Fragment((G4int) (A-Aabr), (G4int) (Z-Zabr), lorentzVector);
797 } 742 }
798 743
799 return fragment; 744 return fragment;
800 } 745 }
801 ////////////////////////////////////////////// 746 ////////////////////////////////////////////////////////////////////////////////
802 // 747 //
803 G4double G4WilsonAbrasionModel::GetNucleonIndu 748 G4double G4WilsonAbrasionModel::GetNucleonInducedExcitation
804 (G4double rP, G4double rT, G4double r) 749 (G4double rP, G4double rT, G4double r)
805 { 750 {
806 // 751 //
807 // 752 //
808 // Initialise variables. 753 // Initialise variables.
809 // 754 //
810 G4double Cl = 0.0; 755 G4double Cl = 0.0;
811 G4double rPsq = rP * rP; 756 G4double rPsq = rP * rP;
812 G4double rTsq = rT * rT; 757 G4double rTsq = rT * rT;
813 G4double rsq = r * r; 758 G4double rsq = r * r;
814 // 759 //
815 // 760 //
816 // Depending upon the impact parameter, a diff 761 // Depending upon the impact parameter, a different form of the chord length is
817 // is used. 762 // is used.
818 // 763 //
819 if (r > rT) Cl = 2.0*std::sqrt(rPsq + 2.0*r* 764 if (r > rT) Cl = 2.0*std::sqrt(rPsq + 2.0*r*rT - rsq - rTsq);
820 else Cl = 2.0*rP; 765 else Cl = 2.0*rP;
821 // << 766
822 // << 767 G4double bP = (rPsq+rsq-rTsq)/2.0/r;
823 // The next lines have been changed to include << 768 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 } <<
848 769
849 G4double Ex = 13.0 * Cl / fermi; 770 G4double Ex = 13.0 * Cl / fermi;
850 if (Ct > 1.5*fermi) 771 if (Ct > 1.5*fermi)
851 Ex += 13.0 * Cl / fermi /3.0 * (Ct/fermi - 772 Ex += 13.0 * Cl / fermi /3.0 * (Ct/fermi - 1.5);
852 773
853 return Ex; 774 return Ex;
854 } 775 }
855 ////////////////////////////////////////////// 776 ////////////////////////////////////////////////////////////////////////////////
856 // 777 //
857 void G4WilsonAbrasionModel::SetUseAblation (G4 778 void G4WilsonAbrasionModel::SetUseAblation (G4bool useAblation1)
858 { 779 {
859 if (useAblation != useAblation1) 780 if (useAblation != useAblation1)
860 { 781 {
861 useAblation = useAblation1; 782 useAblation = useAblation1;
>> 783 delete theExcitationHandler;
>> 784 delete theExcitationHandlerx;
>> 785 theExcitationHandler = new G4ExcitationHandler;
>> 786 theExcitationHandlerx = new G4ExcitationHandler;
862 if (useAblation) 787 if (useAblation)
863 { 788 {
864 theAblation = new G4WilsonAblationModel; 789 theAblation = new G4WilsonAblationModel;
865 theAblation->SetVerboseLevel(verboseLeve 790 theAblation->SetVerboseLevel(verboseLevel);
866 theExcitationHandler->SetEvaporation(the 791 theExcitationHandler->SetEvaporation(theAblation);
>> 792 theExcitationHandlerx->SetEvaporation(theAblation);
867 } 793 }
868 else 794 else
869 { 795 {
870 delete theExcitationHandler; << 796 theAblation = NULL;
871 theAblation = nullp << 797 G4Evaporation * theEvaporation = new G4Evaporation;
872 theExcitationHandler = new G4Excitation << 798 G4FermiBreakUp * theFermiBreakUp = new G4FermiBreakUp;
>> 799 G4StatMF * theMF = new G4StatMF;
>> 800 theExcitationHandler->SetEvaporation(theEvaporation);
>> 801 theExcitationHandler->SetFermiModel(theFermiBreakUp);
>> 802 theExcitationHandler->SetMultiFragmentation(theMF);
>> 803 theExcitationHandler->SetMaxAandZForFermiBreakUp(12, 6);
>> 804 theExcitationHandler->SetMinEForMultiFrag(5.0*MeV);
>> 805
>> 806 theEvaporation = new G4Evaporation;
>> 807 theFermiBreakUp = new G4FermiBreakUp;
>> 808 theExcitationHandlerx->SetEvaporation(theEvaporation);
>> 809 theExcitationHandlerx->SetFermiModel(theFermiBreakUp);
>> 810 theExcitationHandlerx->SetMaxAandZForFermiBreakUp(12, 6);
873 } 811 }
874 } 812 }
875 return; 813 return;
876 } 814 }
877 ////////////////////////////////////////////// 815 ////////////////////////////////////////////////////////////////////////////////
878 // 816 //
879 void G4WilsonAbrasionModel::PrintWelcomeMessag 817 void G4WilsonAbrasionModel::PrintWelcomeMessage ()
880 { 818 {
881 G4cout <<G4endl; 819 G4cout <<G4endl;
882 G4cout <<" ********************************* 820 G4cout <<" *****************************************************************"
883 <<G4endl; 821 <<G4endl;
884 G4cout <<" Nuclear abrasion model for nuclea 822 G4cout <<" Nuclear abrasion model for nuclear-nuclear interactions activated"
885 <<G4endl; 823 <<G4endl;
886 G4cout <<" (Written by QinetiQ Ltd for the E 824 G4cout <<" (Written by QinetiQ Ltd for the European Space Agency)"
887 <<G4endl; 825 <<G4endl;
888 G4cout <<" ********************************* 826 G4cout <<" *****************************************************************"
889 <<G4endl; 827 <<G4endl;
890 G4cout << G4endl; 828 G4cout << G4endl;
891 829
892 return; 830 return;
893 } 831 }
894 ////////////////////////////////////////////// 832 ////////////////////////////////////////////////////////////////////////////////
895 // 833 //
896 834