| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer << 3 // * DISCLAIMER *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th << 5 // * The following disclaimer summarizes all the specific disclaimers *
6 // * the Geant4 Collaboration. It is provided << 6 // * of contributors to this software. The specific disclaimers,which *
7 // * conditions of the Geant4 Software License << 7 // * govern, are listed with their locations in: *
8 // * LICENSE and available at http://cern.ch/ << 8 // * http://cern.ch/geant4/license *
9 // * include a list of copyright holders. <<
10 // * 9 // * *
11 // * Neither the authors of this software syst 10 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 11 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 12 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 13 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file << 14 // * use. *
16 // * for the full disclaimer and the limitatio <<
17 // * 15 // * *
18 // * This code implementation is the result << 16 // * This code implementation is the intellectual property of the *
19 // * technical work of the GEANT4 collaboratio << 17 // * GEANT4 collaboration. *
20 // * 18 // * *
21 // * Parts of this code which have been devel 19 // * Parts of this code which have been developed by QinetiQ Ltd *
22 // * under contract to the European Space Agen << 20 // * under contract to the European Space Agency (ESA) are the *
23 // * intellectual property of ESA. Rights to u 21 // * intellectual property of ESA. Rights to use, copy, modify and *
24 // * redistribute this software for general pu 22 // * redistribute this software for general public use are granted *
25 // * in compliance with any licensing, distrib 23 // * in compliance with any licensing, distribution and development *
26 // * policy adopted by the Geant4 Collaboratio 24 // * policy adopted by the Geant4 Collaboration. This code has been *
27 // * written by QinetiQ Ltd for the European S 25 // * written by QinetiQ Ltd for the European Space Agency, under ESA *
28 // * contract 17191/03/NL/LvH (Aurora Programm << 26 // * contract 17191/03/NL/LvH (Aurora Programme). *
29 // * 27 // * *
30 // * By using, copying, modifying or distri << 28 // * By copying, distributing or modifying the Program (or any work *
31 // * any work based on the software) you ag << 29 // * based on the Program) you indicate your acceptance of this *
32 // * use in resulting scientific publicati << 30 // * statement, and all its terms. *
33 // * acceptance of all terms of the Geant4 Sof <<
34 // ******************************************* 31 // ********************************************************************
35 // 32 //
36 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 33 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
37 // 34 //
38 // MODULE: G4WilsonAblationModel. 35 // MODULE: G4WilsonAblationModel.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 // 08 December 2009, P R Truscott, QinetiQ Ltd <<
59 // Ver 1.0 <<
60 // Updated as a result of changes in the G4Eva <<
61 // affect mostly SelectSecondariesByEvaporatio <<
62 // associated with the evaporation model which <<
63 // OPTxs to select the inverse cross-sectio <<
64 // OPTxs = 0 => Dostrovski's parameter <<
65 // OPTxs = 1 or 2 => Chatterjee's paramater <<
66 // OPTxs = 3 or 4 => Kalbach's parameteriza <<
67 // useSICB => use superimposed Coulo <<
68 // sections <<
69 // Other problem found with G4Fragment definit <<
70 // **G4ParticleDefinition**. This does not al <<
71 // fragment for some reason. Now the fragment <<
72 // G4Fragment *fragment = new G4Fragment(A, <<
73 // to avoid this quirk. Bug found in SelectSe <<
74 // equated to evapType[i] whereas previously i <<
75 // <<
76 // 06 August 2015, A. Ribon, CERN <<
77 // Migrated std::exp and std::pow to the faste <<
78 // <<
79 // 09 June 2017, C. Mancini Terracciano, INFN <<
80 // Fixed bug on the initialization of Photon E <<
81 // <<
82 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 55 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
83 ////////////////////////////////////////////// 56 ////////////////////////////////////////////////////////////////////////////////
84 // 57 //
85 #include <iomanip> <<
86 #include <numeric> <<
87 <<
88 #include "G4WilsonAblationModel.hh" 58 #include "G4WilsonAblationModel.hh"
89 #include "G4PhysicalConstants.hh" <<
90 #include "G4SystemOfUnits.hh" <<
91 #include "Randomize.hh" 59 #include "Randomize.hh"
92 #include "G4ParticleTable.hh" 60 #include "G4ParticleTable.hh"
93 #include "G4IonTable.hh" 61 #include "G4IonTable.hh"
94 #include "G4Alpha.hh" 62 #include "G4Alpha.hh"
95 #include "G4He3.hh" 63 #include "G4He3.hh"
96 #include "G4Triton.hh" 64 #include "G4Triton.hh"
97 #include "G4Deuteron.hh" 65 #include "G4Deuteron.hh"
98 #include "G4Proton.hh" 66 #include "G4Proton.hh"
99 #include "G4Neutron.hh" 67 #include "G4Neutron.hh"
100 #include "G4AlphaEvaporationChannel.hh" 68 #include "G4AlphaEvaporationChannel.hh"
101 #include "G4He3EvaporationChannel.hh" 69 #include "G4He3EvaporationChannel.hh"
102 #include "G4TritonEvaporationChannel.hh" 70 #include "G4TritonEvaporationChannel.hh"
103 #include "G4DeuteronEvaporationChannel.hh" 71 #include "G4DeuteronEvaporationChannel.hh"
104 #include "G4ProtonEvaporationChannel.hh" 72 #include "G4ProtonEvaporationChannel.hh"
105 #include "G4NeutronEvaporationChannel.hh" 73 #include "G4NeutronEvaporationChannel.hh"
106 #include "G4PhotonEvaporation.hh" <<
107 #include "G4LorentzVector.hh" 74 #include "G4LorentzVector.hh"
108 #include "G4VEvaporationChannel.hh" 75 #include "G4VEvaporationChannel.hh"
109 76
110 #include "G4Exp.hh" << 77 #include <iomanip>
111 #include "G4Pow.hh" << 78 #include <numeric>
112 <<
113 #include "G4PhysicsModelCatalog.hh" <<
114 <<
115 ////////////////////////////////////////////// 79 ////////////////////////////////////////////////////////////////////////////////
116 // 80 //
117 G4WilsonAblationModel::G4WilsonAblationModel() 81 G4WilsonAblationModel::G4WilsonAblationModel()
118 { 82 {
119 // 83 //
120 // 84 //
121 // Send message to stdout to advise that the G 85 // Send message to stdout to advise that the G4Abrasion model is being used.
122 // 86 //
123 PrintWelcomeMessage(); 87 PrintWelcomeMessage();
124 // 88 //
125 // 89 //
126 // Set the default verbose level to 0 - no out 90 // Set the default verbose level to 0 - no output.
127 // 91 //
128 verboseLevel = 0; 92 verboseLevel = 0;
129 // 93 //
130 // 94 //
131 // Set the binding energy per nucleon .... did 95 // Set the binding energy per nucleon .... did I mention that this is a crude
132 // model for nuclear de-excitation? 96 // model for nuclear de-excitation?
133 // 97 //
134 B = 10.0 * MeV; 98 B = 10.0 * MeV;
135 // 99 //
136 // 100 //
137 // It is possuble to switch off secondary part 101 // It is possuble to switch off secondary particle production (other than the
138 // final nuclear fragment). The default is on 102 // final nuclear fragment). The default is on.
139 // 103 //
140 produceSecondaries = true; 104 produceSecondaries = true;
141 // 105 //
142 // 106 //
143 // Now we need to define the decay modes. We' 107 // Now we need to define the decay modes. We're using the G4Evaporation model
144 // to help determine the kinematics of the dec 108 // to help determine the kinematics of the decay.
145 // 109 //
146 nFragTypes = 6; 110 nFragTypes = 6;
147 fragType[0] = G4Alpha::Alpha(); 111 fragType[0] = G4Alpha::Alpha();
148 fragType[1] = G4He3::He3(); 112 fragType[1] = G4He3::He3();
149 fragType[2] = G4Triton::Triton(); 113 fragType[2] = G4Triton::Triton();
150 fragType[3] = G4Deuteron::Deuteron(); 114 fragType[3] = G4Deuteron::Deuteron();
151 fragType[4] = G4Proton::Proton(); 115 fragType[4] = G4Proton::Proton();
152 fragType[5] = G4Neutron::Neutron(); 116 fragType[5] = G4Neutron::Neutron();
153 for(G4int i=0; i<200; ++i) { fSig[i] = 0.0; <<
154 // 117 //
155 // 118 //
156 // Set verboseLevel default to no output. 119 // Set verboseLevel default to no output.
157 // 120 //
158 verboseLevel = 0; 121 verboseLevel = 0;
159 theChannelFactory = new G4EvaporationFactory <<
160 theChannels = theChannelFactory->GetChannel( <<
161 // <<
162 // <<
163 // Set defaults for evaporation classes. Thes <<
164 // "set" methods. <<
165 // <<
166 OPTxs = 3; <<
167 useSICB = false; <<
168 fragmentVector = 0; <<
169 <<
170 secID = G4PhysicsModelCatalog::GetModelID("m <<
171 } 122 }
172 ////////////////////////////////////////////// 123 ////////////////////////////////////////////////////////////////////////////////
173 // 124 //
174 G4WilsonAblationModel::~G4WilsonAblationModel( 125 G4WilsonAblationModel::~G4WilsonAblationModel()
175 {} << 126 {;}
176 <<
177 ////////////////////////////////////////////// 127 ////////////////////////////////////////////////////////////////////////////////
178 // 128 //
179 G4FragmentVector *G4WilsonAblationModel::Break 129 G4FragmentVector *G4WilsonAblationModel::BreakItUp
180 (const G4Fragment &theNucleus) 130 (const G4Fragment &theNucleus)
181 { 131 {
182 // 132 //
183 // 133 //
184 // Initilise the pointer to the G4FragmentVect 134 // Initilise the pointer to the G4FragmentVector used to return the information
185 // about the breakup. 135 // about the breakup.
186 // 136 //
187 fragmentVector = new G4FragmentVector; 137 fragmentVector = new G4FragmentVector;
188 fragmentVector->clear(); 138 fragmentVector->clear();
189 // 139 //
190 // 140 //
191 // Get the A, Z and excitation of the nucleus. 141 // Get the A, Z and excitation of the nucleus.
192 // 142 //
193 G4int A = theNucleus.GetA_asInt(); << 143 G4int A = (G4int) theNucleus.GetA();
194 G4int Z = theNucleus.GetZ_asInt(); << 144 G4int Z = (G4int) theNucleus.GetZ();
195 G4double ex = theNucleus.GetExcitationEnergy 145 G4double ex = theNucleus.GetExcitationEnergy();
196 if (verboseLevel >= 2) 146 if (verboseLevel >= 2)
197 { 147 {
198 G4cout <<"oooooooooooooooooooooooooooooooo 148 G4cout <<"oooooooooooooooooooooooooooooooooooooooo"
199 <<"oooooooooooooooooooooooooooooooo 149 <<"oooooooooooooooooooooooooooooooooooooooo"
200 <<G4endl; 150 <<G4endl;
201 G4cout.precision(6); 151 G4cout.precision(6);
202 G4cout <<"IN G4WilsonAblationModel" <<G4en 152 G4cout <<"IN G4WilsonAblationModel" <<G4endl;
203 G4cout <<"Initial prefragment A=" <<A 153 G4cout <<"Initial prefragment A=" <<A
204 <<", Z=" <<Z 154 <<", Z=" <<Z
205 <<", excitation energy = " <<ex/MeV 155 <<", excitation energy = " <<ex/MeV <<" MeV"
206 <<G4endl; 156 <<G4endl;
207 } 157 }
208 // 158 //
209 // 159 //
210 // Check that there is a nucleus to speak of. 160 // Check that there is a nucleus to speak of. It's possible there isn't one
211 // or its just a proton or neutron. In either 161 // or its just a proton or neutron. In either case, the excitation energy
212 // (from the Lorentz vector) is not used. 162 // (from the Lorentz vector) is not used.
213 // 163 //
214 if (A == 0) 164 if (A == 0)
215 { 165 {
216 if (verboseLevel >= 2) 166 if (verboseLevel >= 2)
217 { 167 {
218 G4cout <<"No nucleus to decay" <<G4endl; 168 G4cout <<"No nucleus to decay" <<G4endl;
219 G4cout <<"oooooooooooooooooooooooooooooo 169 G4cout <<"oooooooooooooooooooooooooooooooooooooooo"
220 <<"oooooooooooooooooooooooooooooo 170 <<"oooooooooooooooooooooooooooooooooooooooo"
221 <<G4endl; 171 <<G4endl;
222 } 172 }
223 return fragmentVector; 173 return fragmentVector;
224 } 174 }
225 else if (A == 1) 175 else if (A == 1)
226 { 176 {
227 G4LorentzVector lorentzVector = theNucleus 177 G4LorentzVector lorentzVector = theNucleus.GetMomentum();
228 lorentzVector.setE(lorentzVector.e()-ex+10 178 lorentzVector.setE(lorentzVector.e()-ex+10.0*eV);
229 if (Z == 0) 179 if (Z == 0)
230 { 180 {
231 G4Fragment *fragment = new G4Fragment(lo 181 G4Fragment *fragment = new G4Fragment(lorentzVector,G4Neutron::Neutron());
232 if (fragment != nullptr) { fragment->Set <<
233 fragmentVector->push_back(fragment); 182 fragmentVector->push_back(fragment);
234 } 183 }
235 else 184 else
236 { 185 {
237 G4Fragment *fragment = new G4Fragment(lo 186 G4Fragment *fragment = new G4Fragment(lorentzVector,G4Proton::Proton());
238 if (fragment != nullptr) { fragment->Set <<
239 fragmentVector->push_back(fragment); 187 fragmentVector->push_back(fragment);
240 } 188 }
241 if (verboseLevel >= 2) 189 if (verboseLevel >= 2)
242 { 190 {
243 G4cout <<"Final fragment is in fact only 191 G4cout <<"Final fragment is in fact only a nucleon) :" <<G4endl;
244 G4cout <<(*fragmentVector)[0] <<G4endl; 192 G4cout <<(*fragmentVector)[0] <<G4endl;
245 G4cout <<"oooooooooooooooooooooooooooooo 193 G4cout <<"oooooooooooooooooooooooooooooooooooooooo"
246 <<"oooooooooooooooooooooooooooooo 194 <<"oooooooooooooooooooooooooooooooooooooooo"
247 <<G4endl; 195 <<G4endl;
248 } 196 }
249 return fragmentVector; 197 return fragmentVector;
250 } 198 }
251 // 199 //
252 // 200 //
253 // Then the number of nucleons ablated (either 201 // Then the number of nucleons ablated (either as nucleons or light nuclear
254 // fragments) is based on a simple argument fo 202 // fragments) is based on a simple argument for the binding energy per nucleon.
255 // 203 //
256 G4int DAabl = (G4int) (ex / B); 204 G4int DAabl = (G4int) (ex / B);
257 if (DAabl > A) DAabl = A; 205 if (DAabl > A) DAabl = A;
258 // The following lines are no longer accurate << 206 if (verboseLevel >= 2)
259 // if (verboseLevel >= 2) << 207 G4cout <<"Number of nucleons ejected = " <<DAabl <<G4endl;
260 // G4cout <<"Number of nucleons ejected = " <<
261 208
262 // 209 //
263 // 210 //
264 // Determine the nuclear fragment from the abl 211 // Determine the nuclear fragment from the ablation process by sampling the
265 // Rudstam equation. 212 // Rudstam equation.
266 // 213 //
267 G4int AF = A - DAabl; 214 G4int AF = A - DAabl;
268 G4int ZF = 0; 215 G4int ZF = 0;
269 <<
270 if (AF > 0) 216 if (AF > 0)
271 { 217 {
272 G4Pow* g4calc = G4Pow::GetInstance(); << 218 G4double AFd = static_cast<G4double>(AF);
273 G4double AFd = (G4double) AF; << 219 G4double R = 11.8 / std::pow(AFd, 0.45);
274 G4double R = 11.8 / g4calc->powZ(AF, 0.45) << 220 G4int minZ = Z - DAabl;
275 G4int minZ = std::max(1, Z - DAabl); << 221 if (minZ <= 0) minZ = 1;
276 // 222 //
277 // 223 //
278 // Here we define an integral probability dist 224 // Here we define an integral probability distribution based on the Rudstam
279 // equation assuming a constant AF. 225 // equation assuming a constant AF.
280 // 226 //
281 G4int zmax = std::min(199, Z); << 227 G4double sig[100];
282 G4double sum = 0.0; 228 G4double sum = 0.0;
283 for (ZF=minZ; ZF<=zmax; ++ZF) << 229 for (G4int ii=minZ; ii<= Z; ii++)
284 { 230 {
285 sum += G4Exp(-R*g4calc->powA(std::abs(ZF << 231 sum += std::exp(-R*std::pow(std::abs(ii - 0.486*AFd + 3.8E-04*AFd*AFd),1.5));
286 fSig[ZF] = sum; << 232 sig[ii] = sum;
287 } 233 }
288 // 234 //
289 // 235 //
290 // Now sample that distribution to determine a 236 // Now sample that distribution to determine a value for ZF.
291 // 237 //
292 sum *= G4UniformRand(); << 238 G4double xi = G4UniformRand();
293 for (ZF=minZ; ZF<=zmax; ++ZF) { << 239 G4int iz = minZ;
294 if(sum <= fSig[ZF]) { break; } << 240 G4bool found = false;
295 } << 241 while (iz <= Z && !found)
>> 242 {
>> 243 found = (xi <= sig[iz]/sum);
>> 244 if (!found) iz++;
>> 245 }
>> 246 if (iz > Z)
>> 247 ZF = Z;
>> 248 else
>> 249 ZF = iz;
296 } 250 }
297 G4int DZabl = Z - ZF; 251 G4int DZabl = Z - ZF;
>> 252 if (verboseLevel >= 2)
>> 253 G4cout <<"Final fragment A=" <<AF
>> 254 <<", Z=" <<ZF
>> 255 <<G4endl;
298 // 256 //
299 // 257 //
300 // Now determine the nucleons or nuclei which 258 // Now determine the nucleons or nuclei which have bee ablated. The preference
301 // is for the production of alphas, then other 259 // is for the production of alphas, then other nuclei in order of decreasing
302 // binding energy. The energies assigned to th 260 // binding energy. The energies assigned to the products of the decay are
303 // provisional for the moment (the 10eV is jus 261 // provisional for the moment (the 10eV is just to avoid errors with negative
304 // excitation energies due to rounding). 262 // excitation energies due to rounding).
305 // 263 //
306 G4double totalEpost = 0.0; 264 G4double totalEpost = 0.0;
307 evapType.clear(); 265 evapType.clear();
308 for (G4int ift=0; ift<nFragTypes; ift++) 266 for (G4int ift=0; ift<nFragTypes; ift++)
309 { 267 {
310 G4ParticleDefinition *type = fragType[ift] 268 G4ParticleDefinition *type = fragType[ift];
311 G4double n = std::floor((G4double) DAabl 269 G4double n = std::floor((G4double) DAabl / type->GetBaryonNumber() + 1.0E-10);
312 G4double n1 = 1.0E+10; 270 G4double n1 = 1.0E+10;
313 if (fragType[ift]->GetPDGCharge() > 0.0) 271 if (fragType[ift]->GetPDGCharge() > 0.0)
314 n1 = std::floor((G4double) DZabl / type- 272 n1 = std::floor((G4double) DZabl / type->GetPDGCharge() + 1.0E-10);
315 if (n > n1) n = n1; 273 if (n > n1) n = n1;
316 if (n > 0.0) 274 if (n > 0.0)
317 { 275 {
318 G4double mass = type->GetPDGMass(); 276 G4double mass = type->GetPDGMass();
319 for (G4int j=0; j<(G4int) n; j++) 277 for (G4int j=0; j<(G4int) n; j++)
320 { 278 {
321 totalEpost += mass; 279 totalEpost += mass;
322 evapType.push_back(type); 280 evapType.push_back(type);
323 } 281 }
324 DAabl -= (G4int) (n * type->GetBaryonNum 282 DAabl -= (G4int) (n * type->GetBaryonNumber() + 1.0E-10);
325 DZabl -= (G4int) (n * type->GetPDGCharge 283 DZabl -= (G4int) (n * type->GetPDGCharge() + 1.0E-10);
>> 284 if (verboseLevel >= 2)
>> 285 G4cout <<"Particle type: " <<std::setw(10) <<type->GetParticleName()
>> 286 <<", number of particles emitted = " <<n
>> 287 <<G4endl;
326 } 288 }
327 } 289 }
328 // 290 //
329 // 291 //
330 // Determine the properties of the final nucle << 292 // Determine the properties of the final nuclear fragment.
331 // the final fragment is predicted to have a n <<
332 // really it's the particle last in the vector <<
333 // final fragment. Therefore delete this from <<
334 // case. <<
335 // 293 //
336 G4double massFinalFrag = 0.0; 294 G4double massFinalFrag = 0.0;
337 if (AF > 0) << 295 if (AF > 0.0)
338 massFinalFrag = G4ParticleTable::GetPartic 296 massFinalFrag = G4ParticleTable::GetParticleTable()->GetIonTable()->
339 GetIonMass(ZF,AF); 297 GetIonMass(ZF,AF);
340 else <<
341 { <<
342 G4ParticleDefinition *type = evapType[evap <<
343 AF = type->GetBary <<
344 ZF = (G4int) (type <<
345 evapType.erase(evapType.end()-1); <<
346 } <<
347 totalEpost += massFinalFrag; 298 totalEpost += massFinalFrag;
348 // 299 //
349 // 300 //
350 // Provide verbose output on the nuclear fragm <<
351 // <<
352 if (verboseLevel >= 2) <<
353 { <<
354 G4cout <<"Final fragment A=" <<AF <<
355 <<", Z=" <<ZF <<
356 <<G4endl; <<
357 for (G4int ift=0; ift<nFragTypes; ift++) <<
358 { <<
359 G4ParticleDefinition *type = fragType[if <<
360 G4long n = std::count(evapType.cbegin(), <<
361 if (n > 0) <<
362 G4cout <<"Particle type: " <<std::setw <<
363 <<", number of particles emitte <<
364 } <<
365 } <<
366 // <<
367 // Add the total energy from the fragment. No 301 // Add the total energy from the fragment. Note that the fragment is assumed
368 // to be de-excited and does not undergo photo 302 // to be de-excited and does not undergo photo-evaporation .... I did mention
369 // this is a bit of a crude model? 303 // this is a bit of a crude model?
370 // 304 //
371 G4double massPreFrag = theNucleus.GetGr 305 G4double massPreFrag = theNucleus.GetGroundStateMass();
372 G4double totalEpre = massPreFrag + ex 306 G4double totalEpre = massPreFrag + ex;
373 G4double excess = totalEpre - tota 307 G4double excess = totalEpre - totalEpost;
374 // G4Fragment *resultNucleus(theNucleus); 308 // G4Fragment *resultNucleus(theNucleus);
375 G4Fragment *resultNucleus = new G4Fragment(A 309 G4Fragment *resultNucleus = new G4Fragment(A, Z, theNucleus.GetMomentum());
376 G4ThreeVector boost(0.0,0.0,0.0); 310 G4ThreeVector boost(0.0,0.0,0.0);
377 std::size_t nEvap = 0; << 311 G4int nEvap = 0;
378 if (produceSecondaries && evapType.size()>0) 312 if (produceSecondaries && evapType.size()>0)
379 { 313 {
380 if (excess > 0.0) 314 if (excess > 0.0)
381 { 315 {
382 SelectSecondariesByEvaporation (resultNu 316 SelectSecondariesByEvaporation (resultNucleus);
383 nEvap = fragmentVector->size(); 317 nEvap = fragmentVector->size();
384 boost = resultNucleus->GetMomentum().fin 318 boost = resultNucleus->GetMomentum().findBoostToCM();
385 if (evapType.size() > 0) 319 if (evapType.size() > 0)
386 SelectSecondariesByDefault (boost); 320 SelectSecondariesByDefault (boost);
387 } 321 }
388 else 322 else
389 SelectSecondariesByDefault(G4ThreeVector 323 SelectSecondariesByDefault(G4ThreeVector(0.0,0.0,0.0));
390 } 324 }
391 <<
392 if (AF > 0) 325 if (AF > 0)
393 { 326 {
394 G4double mass = G4ParticleTable::GetPartic 327 G4double mass = G4ParticleTable::GetParticleTable()->GetIonTable()->
395 GetIonMass(ZF,AF); 328 GetIonMass(ZF,AF);
396 G4double e = mass + 10.0*eV; 329 G4double e = mass + 10.0*eV;
397 G4double p = std::sqrt(e*e-mass*mass); 330 G4double p = std::sqrt(e*e-mass*mass);
398 G4ThreeVector direction(0.0,0.0,1.0); 331 G4ThreeVector direction(0.0,0.0,1.0);
399 G4LorentzVector lorentzVector = G4LorentzV 332 G4LorentzVector lorentzVector = G4LorentzVector(direction*p, e);
400 lorentzVector.boost(-boost); 333 lorentzVector.boost(-boost);
401 G4Fragment* frag = new G4Fragment(AF, ZF, << 334 *resultNucleus = G4Fragment(AF, ZF, lorentzVector);
402 if (frag != nullptr) { frag->SetCreatorMod << 335 fragmentVector->push_back(resultNucleus);
403 fragmentVector->push_back(frag); <<
404 } 336 }
405 delete resultNucleus; <<
406 // 337 //
407 // 338 //
408 // Provide verbose output on the ablation prod 339 // Provide verbose output on the ablation products if requested.
409 // 340 //
410 if (verboseLevel >= 2) 341 if (verboseLevel >= 2)
411 { 342 {
412 if (nEvap > 0) 343 if (nEvap > 0)
413 { 344 {
414 G4cout <<"----------------------" <<G4en 345 G4cout <<"----------------------" <<G4endl;
415 G4cout <<"Evaporated particles :" <<G4en 346 G4cout <<"Evaporated particles :" <<G4endl;
416 G4cout <<"----------------------" <<G4en 347 G4cout <<"----------------------" <<G4endl;
417 } 348 }
418 std::size_t ie = 0; << 349 G4int ie = 0;
419 for (auto iter = fragmentVector->cbegin(); << 350 G4FragmentVector::iterator iter;
420 iter != fragmentVector->cend(); << 351 for (iter = fragmentVector->begin(); iter != fragmentVector->end(); ++iter)
421 { 352 {
422 if (ie == nEvap) 353 if (ie == nEvap)
423 { 354 {
424 // G4cout <<*iter <<G4endl; << 355 G4cout <<*iter <<G4endl;
425 G4cout <<"---------------------------- 356 G4cout <<"---------------------------------" <<G4endl;
426 G4cout <<"Particles from default emiss 357 G4cout <<"Particles from default emission :" <<G4endl;
427 G4cout <<"---------------------------- 358 G4cout <<"---------------------------------" <<G4endl;
428 } 359 }
429 G4cout <<*iter <<G4endl; 360 G4cout <<*iter <<G4endl;
430 } 361 }
431 G4cout <<"oooooooooooooooooooooooooooooooo 362 G4cout <<"oooooooooooooooooooooooooooooooooooooooo"
432 <<"oooooooooooooooooooooooooooooooo 363 <<"oooooooooooooooooooooooooooooooooooooooo"
433 <<G4endl; 364 <<G4endl;
434 } 365 }
435 366
436 return fragmentVector; 367 return fragmentVector;
437 } 368 }
438 ////////////////////////////////////////////// 369 ////////////////////////////////////////////////////////////////////////////////
439 // 370 //
440 void G4WilsonAblationModel::SelectSecondariesB 371 void G4WilsonAblationModel::SelectSecondariesByEvaporation
441 (G4Fragment *intermediateNucleus) 372 (G4Fragment *intermediateNucleus)
442 { 373 {
443 G4Fragment theResidualNucleus = *intermediat <<
444 G4bool evaporate = true; 374 G4bool evaporate = true;
445 // Loop checking, 05-Aug-2015, Vladimir Ivan <<
446 while (evaporate && evapType.size() != 0) 375 while (evaporate && evapType.size() != 0)
447 { 376 {
448 // 377 //
449 // 378 //
450 // Here's the cheaky bit. We're hijacking the 379 // Here's the cheaky bit. We're hijacking the G4Evaporation model, in order to
451 // more accurately sample to kinematics, but t 380 // more accurately sample to kinematics, but the species of the nuclear
452 // fragments will be the ones of our choosing 381 // fragments will be the ones of our choosing as above.
453 // 382 //
454 std::vector <G4VEvaporationChannel*> theC << 383 std::vector <G4VEvaporationChannel*> theChannels;
455 theChannels1.clear(); << 384 theChannels.clear();
456 std::vector <G4VEvaporationChannel*>::iter <<
457 VectorOfFragmentTypes::iterator iter; 385 VectorOfFragmentTypes::iterator iter;
458 std::vector <VectorOfFragmentTypes::iterat 386 std::vector <VectorOfFragmentTypes::iterator> iters;
459 iters.clear(); 387 iters.clear();
460 iter = std::find(evapType.begin(), evapTyp 388 iter = std::find(evapType.begin(), evapType.end(), G4Alpha::Alpha());
461 if (iter != evapType.end()) 389 if (iter != evapType.end())
462 { 390 {
463 theChannels1.push_back(new G4AlphaEvapor << 391 theChannels.push_back(new G4AlphaEvaporationChannel);
464 i = theChannels1.end() - 1; <<
465 (*i)->SetOPTxs(OPTxs); <<
466 (*i)->UseSICB(useSICB); <<
467 // (*i)->Initialize(theResidualNucleus); <<
468 iters.push_back(iter); 392 iters.push_back(iter);
469 } 393 }
470 iter = std::find(evapType.begin(), evapTyp 394 iter = std::find(evapType.begin(), evapType.end(), G4He3::He3());
471 if (iter != evapType.end()) 395 if (iter != evapType.end())
472 { 396 {
473 theChannels1.push_back(new G4He3Evaporat << 397 theChannels.push_back(new G4He3EvaporationChannel);
474 i = theChannels1.end() - 1; <<
475 (*i)->SetOPTxs(OPTxs); <<
476 (*i)->UseSICB(useSICB); <<
477 // (*i)->Initialize(theResidualNucleus); <<
478 iters.push_back(iter); 398 iters.push_back(iter);
479 } 399 }
480 iter = std::find(evapType.begin(), evapTyp 400 iter = std::find(evapType.begin(), evapType.end(), G4Triton::Triton());
481 if (iter != evapType.end()) 401 if (iter != evapType.end())
482 { 402 {
483 theChannels1.push_back(new G4TritonEvapo << 403 theChannels.push_back(new G4TritonEvaporationChannel);
484 i = theChannels1.end() - 1; <<
485 (*i)->SetOPTxs(OPTxs); <<
486 (*i)->UseSICB(useSICB); <<
487 // (*i)->Initialize(theResidualNucleus); <<
488 iters.push_back(iter); 404 iters.push_back(iter);
489 } 405 }
490 iter = std::find(evapType.begin(), evapTyp 406 iter = std::find(evapType.begin(), evapType.end(), G4Deuteron::Deuteron());
491 if (iter != evapType.end()) 407 if (iter != evapType.end())
492 { 408 {
493 theChannels1.push_back(new G4DeuteronEva << 409 theChannels.push_back(new G4DeuteronEvaporationChannel);
494 i = theChannels1.end() - 1; <<
495 (*i)->SetOPTxs(OPTxs); <<
496 (*i)->UseSICB(useSICB); <<
497 // (*i)->Initialize(theResidualNucleus); <<
498 iters.push_back(iter); 410 iters.push_back(iter);
499 } 411 }
500 iter = std::find(evapType.begin(), evapTyp 412 iter = std::find(evapType.begin(), evapType.end(), G4Proton::Proton());
501 if (iter != evapType.end()) 413 if (iter != evapType.end())
502 { 414 {
503 theChannels1.push_back(new G4ProtonEvapo << 415 theChannels.push_back(new G4ProtonEvaporationChannel);
504 i = theChannels1.end() - 1; <<
505 (*i)->SetOPTxs(OPTxs); <<
506 (*i)->UseSICB(useSICB); <<
507 // (*i)->Initialize(theResidualNucleus); <<
508 iters.push_back(iter); 416 iters.push_back(iter);
509 } 417 }
510 iter = std::find(evapType.begin(), evapTyp 418 iter = std::find(evapType.begin(), evapType.end(), G4Neutron::Neutron());
511 if (iter != evapType.end()) 419 if (iter != evapType.end())
512 { 420 {
513 theChannels1.push_back(new G4NeutronEvap << 421 theChannels.push_back(new G4NeutronEvaporationChannel);
514 i = theChannels1.end() - 1; <<
515 (*i)->SetOPTxs(OPTxs); <<
516 (*i)->UseSICB(useSICB); <<
517 // (*i)->Initialize(theResidualNucleus); <<
518 iters.push_back(iter); 422 iters.push_back(iter);
519 } 423 }
520 std::size_t nChannels = theChannels1.size( << 424 G4int nChannels = theChannels.size();
521 425
522 G4double totalProb = 0.0; << 426 std::vector<G4VEvaporationChannel*>::iterator iterEv;
523 G4int ich = 0; << 427 for (iterEv=theChannels.begin(); iterEv!=theChannels.end(); iterEv++)
524 G4double probEvapType[6] = {0.0}; << 428 (*iterEv)->Initialize(*intermediateNucleus);
525 for (auto iterEv=theChannels1.cbegin(); << 429 G4double totalProb = std::accumulate(theChannels.begin(),
526 iterEv!=theChannels1.cend(); ++i << 430 theChannels.end(), 0.0, SumProbabilities());
527 totalProb += (*iterEv)->GetEmissionProba << 431 if (totalProb > 0.0)
528 probEvapType[ich] = totalProb; << 432 {
529 ++ich; <<
530 } <<
531 if (totalProb > 0.0) { <<
532 // 433 //
533 // 434 //
534 // The emission probability for at least one o 435 // The emission probability for at least one of the evaporation channels is
535 // positive, therefore work out which one shou 436 // positive, therefore work out which one should be selected and decay
536 // the nucleus. 437 // the nucleus.
537 // 438 //
538 G4double xi = totalProb*G4UniformRand(); << 439 G4double totalProb1 = 0.0;
539 std::size_t ii = 0; << 440 G4double probEvapType[6] = {0.0};
540 for (ii=0; ii<nChannels; ++ii) << 441 for (G4int ich=0; ich<nChannels; ich++)
541 { 442 {
542 if (xi < probEvapType[ii]) { break; } << 443 totalProb1 += theChannels[ich]->GetEmissionProbability();
543 } << 444 probEvapType[ich] = totalProb1 / totalProb;
544 if (ii >= nChannels) { ii = nChannels - <<
545 G4FragmentVector *evaporationResult = th <<
546 BreakUpFragment(intermediateNucleus); <<
547 if ((*evaporationResult)[0] != nullptr) <<
548 { <<
549 (*evaporationResult)[0]->SetCreatorMod <<
550 } 445 }
>> 446 G4double xi = G4UniformRand();
>> 447 G4int i = 0;
>> 448 for (i=0; i<nChannels; i++)
>> 449 if (xi < probEvapType[i]) break;
>> 450 if (i > nChannels) i = nChannels - 1;
>> 451 G4FragmentVector *evaporationResult = theChannels[i]->
>> 452 BreakUp(*intermediateNucleus);
551 fragmentVector->push_back((*evaporationR 453 fragmentVector->push_back((*evaporationResult)[0]);
552 intermediateNucleus = (*evaporationResul << 454 *intermediateNucleus = *(*evaporationResult)[1];
>> 455 delete evaporationResult->back();
553 delete evaporationResult; 456 delete evaporationResult;
>> 457 evapType.erase(iters[i]);
554 } 458 }
555 else 459 else
556 { 460 {
557 // 461 //
558 // 462 //
559 // Probability for further evaporation is nil 463 // Probability for further evaporation is nil so have to escape from this
560 // routine and set the energies of the seconda 464 // routine and set the energies of the secondaries to 10eV.
561 // 465 //
562 evaporate = false; 466 evaporate = false;
563 } 467 }
564 } 468 }
565 469
566 return; 470 return;
567 } 471 }
568 ////////////////////////////////////////////// 472 ////////////////////////////////////////////////////////////////////////////////
569 // 473 //
570 void G4WilsonAblationModel::SelectSecondariesB 474 void G4WilsonAblationModel::SelectSecondariesByDefault (G4ThreeVector boost)
571 { 475 {
572 for (std::size_t i=0; i<evapType.size(); ++i << 476 for (unsigned i=0; i<evapType.size(); i++)
573 { 477 {
574 G4ParticleDefinition *type = evapType[i]; << 478 G4ParticleDefinition *type = fragType[i];
575 G4double mass = type->GetPDGM 479 G4double mass = type->GetPDGMass();
576 G4double e = mass + 10.0*e 480 G4double e = mass + 10.0*eV;
577 G4double p = std::sqrt(e*e 481 G4double p = std::sqrt(e*e-mass*mass);
578 G4double costheta = 2.0*G4Uniform 482 G4double costheta = 2.0*G4UniformRand() - 1.0;
579 G4double sintheta = std::sqrt((1. 483 G4double sintheta = std::sqrt((1.0 - costheta)*(1.0 + costheta));
580 G4double phi = twopi * G4Uni 484 G4double phi = twopi * G4UniformRand() * rad;
581 G4ThreeVector direction(sintheta*std::cos( 485 G4ThreeVector direction(sintheta*std::cos(phi),sintheta*std::sin(phi),costheta);
582 G4LorentzVector lorentzVector = G4LorentzV 486 G4LorentzVector lorentzVector = G4LorentzVector(direction*p, e);
583 lorentzVector.boost(-boost); 487 lorentzVector.boost(-boost);
584 // Possibility that the following line is not <<
585 // from particle definition. Force values. P <<
586 // G4Fragment *fragment = <<
587 // new G4Fragment(lorentzVector, type); <<
588 G4int A = type->GetBaryonNumber(); <<
589 G4int Z = (G4int) (type->GetPDGCharge() + <<
590 G4Fragment *fragment = 488 G4Fragment *fragment =
591 new G4Fragment(A, Z, lorentzVector); << 489 new G4Fragment(lorentzVector, type);
592 if (fragment != nullptr) { fragment->SetCr <<
593 fragmentVector->push_back(fragment); 490 fragmentVector->push_back(fragment);
594 } 491 }
595 } 492 }
596 ////////////////////////////////////////////// 493 ////////////////////////////////////////////////////////////////////////////////
597 // 494 //
598 void G4WilsonAblationModel::PrintWelcomeMessag 495 void G4WilsonAblationModel::PrintWelcomeMessage ()
599 { 496 {
600 G4cout <<G4endl; 497 G4cout <<G4endl;
601 G4cout <<" ********************************* 498 G4cout <<" *****************************************************************"
602 <<G4endl; 499 <<G4endl;
603 G4cout <<" Nuclear ablation model for nuclea 500 G4cout <<" Nuclear ablation model for nuclear-nuclear interactions activated"
604 <<G4endl; 501 <<G4endl;
605 G4cout <<" (Written by QinetiQ Ltd for the E 502 G4cout <<" (Written by QinetiQ Ltd for the European Space Agency)"
606 <<G4endl; <<
607 G4cout <<" !!! WARNING: This model is not we <<
608 <<G4endl; 503 <<G4endl;
609 G4cout <<" ********************************* 504 G4cout <<" *****************************************************************"
610 <<G4endl; 505 <<G4endl;
611 G4cout << G4endl; 506 G4cout << G4endl;
612 507
613 return; 508 return;
614 } 509 }
615 ////////////////////////////////////////////// 510 ////////////////////////////////////////////////////////////////////////////////
616 // 511 //
617 512