1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | // $Id: G4RPGInelastic.cc,v 1.8 2009/11/20 16:39:38 dennis Exp $ |
---|
27 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
---|
28 | // |
---|
29 | |
---|
30 | #include "G4RPGInelastic.hh" |
---|
31 | #include "Randomize.hh" |
---|
32 | #include "G4HadReentrentException.hh" |
---|
33 | #include "G4RPGStrangeProduction.hh" |
---|
34 | #include "G4RPGTwoBody.hh" |
---|
35 | |
---|
36 | |
---|
37 | G4RPGInelastic::G4RPGInelastic(const G4String& modelName) |
---|
38 | : G4HadronicInteraction(modelName) |
---|
39 | { |
---|
40 | cache = 0.0; |
---|
41 | particleDef[0] = G4PionZero::PionZero(); |
---|
42 | particleDef[1] = G4PionPlus::PionPlus(); |
---|
43 | particleDef[2] = G4PionMinus::PionMinus(); |
---|
44 | particleDef[3] = G4KaonPlus::KaonPlus(); |
---|
45 | particleDef[4] = G4KaonMinus::KaonMinus(); |
---|
46 | particleDef[5] = G4KaonZero::KaonZero(); |
---|
47 | particleDef[6] = G4AntiKaonZero::AntiKaonZero(); |
---|
48 | particleDef[7] = G4Proton::Proton(); |
---|
49 | particleDef[8] = G4Neutron::Neutron(); |
---|
50 | particleDef[9] = G4Lambda::Lambda(); |
---|
51 | particleDef[10] = G4SigmaPlus::SigmaPlus(); |
---|
52 | particleDef[11] = G4SigmaZero::SigmaZero(); |
---|
53 | particleDef[12] = G4SigmaMinus::SigmaMinus(); |
---|
54 | particleDef[13] = G4XiZero::XiZero(); |
---|
55 | particleDef[14] = G4XiMinus::XiMinus(); |
---|
56 | particleDef[15] = G4OmegaMinus::OmegaMinus(); |
---|
57 | particleDef[16] = G4AntiProton::AntiProton(); |
---|
58 | particleDef[17] = G4AntiNeutron::AntiNeutron(); |
---|
59 | |
---|
60 | G4cout << " **************************************************** " << G4endl; |
---|
61 | G4cout << " * The RPG model is currently under development and * " << G4endl; |
---|
62 | G4cout << " * should not be used. * " << G4endl; |
---|
63 | G4cout << " **************************************************** " << G4endl; |
---|
64 | } |
---|
65 | |
---|
66 | |
---|
67 | G4double G4RPGInelastic::Pmltpc(G4int np, G4int nm, G4int nz, |
---|
68 | G4int n, G4double b, G4double c) |
---|
69 | { |
---|
70 | const G4double expxu = 82.; // upper bound for arg. of exp |
---|
71 | const G4double expxl = -expxu; // lower bound for arg. of exp |
---|
72 | G4double npf = 0.0; |
---|
73 | G4double nmf = 0.0; |
---|
74 | G4double nzf = 0.0; |
---|
75 | G4int i; |
---|
76 | for( i=2; i<=np; i++ )npf += std::log((double)i); |
---|
77 | for( i=2; i<=nm; i++ )nmf += std::log((double)i); |
---|
78 | for( i=2; i<=nz; i++ )nzf += std::log((double)i); |
---|
79 | G4double r; |
---|
80 | r = std::min( expxu, std::max( expxl, -(np-nm+nz+b)*(np-nm+nz+b)/(2*c*c*n*n)-npf-nmf-nzf ) ); |
---|
81 | return std::exp(r); |
---|
82 | } |
---|
83 | |
---|
84 | |
---|
85 | G4int G4RPGInelastic::Factorial( G4int n ) |
---|
86 | { |
---|
87 | G4int m = std::min(n,10); |
---|
88 | G4int result = 1; |
---|
89 | if( m <= 1 )return result; |
---|
90 | for( G4int i=2; i<=m; ++i )result *= i; |
---|
91 | return result; |
---|
92 | } |
---|
93 | |
---|
94 | |
---|
95 | G4bool G4RPGInelastic::MarkLeadingStrangeParticle( |
---|
96 | const G4ReactionProduct ¤tParticle, |
---|
97 | const G4ReactionProduct &targetParticle, |
---|
98 | G4ReactionProduct &leadParticle ) |
---|
99 | { |
---|
100 | // The following was in GenerateXandPt and TwoCluster. |
---|
101 | // Add a parameter to the GenerateXandPt function telling it about the |
---|
102 | // strange particle. |
---|
103 | // |
---|
104 | // Assumes that the original particle was a strange particle |
---|
105 | // |
---|
106 | G4bool lead = false; |
---|
107 | if( (currentParticle.GetMass() >= G4KaonPlus::KaonPlus()->GetPDGMass()) && |
---|
108 | (currentParticle.GetDefinition() != G4Proton::Proton()) && |
---|
109 | (currentParticle.GetDefinition() != G4Neutron::Neutron()) ) |
---|
110 | { |
---|
111 | lead = true; |
---|
112 | leadParticle = currentParticle; // set lead to the incident particle |
---|
113 | } |
---|
114 | else if( (targetParticle.GetMass() >= G4KaonPlus::KaonPlus()->GetPDGMass()) && |
---|
115 | (targetParticle.GetDefinition() != G4Proton::Proton()) && |
---|
116 | (targetParticle.GetDefinition() != G4Neutron::Neutron()) ) |
---|
117 | { |
---|
118 | lead = true; |
---|
119 | leadParticle = targetParticle; // set lead to the target particle |
---|
120 | } |
---|
121 | return lead; |
---|
122 | } |
---|
123 | |
---|
124 | |
---|
125 | void G4RPGInelastic::SetUpPions(const G4int np, const G4int nm, |
---|
126 | const G4int nz, |
---|
127 | G4FastVector<G4ReactionProduct,256> &vec, |
---|
128 | G4int &vecLen) |
---|
129 | { |
---|
130 | if( np+nm+nz == 0 )return; |
---|
131 | G4int i; |
---|
132 | G4ReactionProduct *p; |
---|
133 | for( i=0; i<np; ++i ) |
---|
134 | { |
---|
135 | p = new G4ReactionProduct; |
---|
136 | p->SetDefinition( G4PionPlus::PionPlus() ); |
---|
137 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
---|
138 | vec.SetElement( vecLen++, p ); |
---|
139 | } |
---|
140 | for( i=np; i<np+nm; ++i ) |
---|
141 | { |
---|
142 | p = new G4ReactionProduct; |
---|
143 | p->SetDefinition( G4PionMinus::PionMinus() ); |
---|
144 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
---|
145 | vec.SetElement( vecLen++, p ); |
---|
146 | } |
---|
147 | for( i=np+nm; i<np+nm+nz; ++i ) |
---|
148 | { |
---|
149 | p = new G4ReactionProduct; |
---|
150 | p->SetDefinition( G4PionZero::PionZero() ); |
---|
151 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
---|
152 | vec.SetElement( vecLen++, p ); |
---|
153 | } |
---|
154 | } |
---|
155 | |
---|
156 | |
---|
157 | void G4RPGInelastic::GetNormalizationConstant( |
---|
158 | const G4double energy, // MeV, <0 means annihilation channels |
---|
159 | G4double &n, |
---|
160 | G4double &anpn ) |
---|
161 | { |
---|
162 | const G4double expxu = 82.; // upper bound for arg. of exp |
---|
163 | const G4double expxl = -expxu; // lower bound for arg. of exp |
---|
164 | const G4int numSec = 60; |
---|
165 | // |
---|
166 | // the only difference between the calculation for annihilation channels |
---|
167 | // and normal is the starting value, iBegin, for the loop below |
---|
168 | // |
---|
169 | G4int iBegin = 1; |
---|
170 | G4double en = energy; |
---|
171 | if( energy < 0.0 ) |
---|
172 | { |
---|
173 | iBegin = 2; |
---|
174 | en *= -1.0; |
---|
175 | } |
---|
176 | // |
---|
177 | // number of total particles vs. centre of mass Energy - 2*proton mass |
---|
178 | // |
---|
179 | G4double aleab = std::log(en/GeV); |
---|
180 | n = 3.62567 + aleab*(0.665843 + aleab*(0.336514 + aleab*(0.117712 + 0.0136912*aleab))); |
---|
181 | n -= 2.0; |
---|
182 | // |
---|
183 | // normalization constant for kno-distribution |
---|
184 | // |
---|
185 | anpn = 0.0; |
---|
186 | G4double test, temp; |
---|
187 | for( G4int i=iBegin; i<=numSec; ++i ) |
---|
188 | { |
---|
189 | temp = pi*i/(2.0*n*n); |
---|
190 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(i*i)/(n*n) ) ) ); |
---|
191 | if( temp < 1.0 ) |
---|
192 | { |
---|
193 | if( test >= 1.0e-10 )anpn += temp*test; |
---|
194 | } |
---|
195 | else |
---|
196 | anpn += temp*test; |
---|
197 | } |
---|
198 | } |
---|
199 | |
---|
200 | void |
---|
201 | G4RPGInelastic::CalculateMomenta(G4FastVector<G4ReactionProduct,256>& vec, |
---|
202 | G4int& vecLen, |
---|
203 | const G4HadProjectile* originalIncident, |
---|
204 | const G4DynamicParticle* originalTarget, |
---|
205 | G4ReactionProduct& modifiedOriginal, |
---|
206 | G4Nucleus& targetNucleus, |
---|
207 | G4ReactionProduct& currentParticle, |
---|
208 | G4ReactionProduct& targetParticle, |
---|
209 | G4bool& incidentHasChanged, |
---|
210 | G4bool& targetHasChanged, |
---|
211 | G4bool quasiElastic) |
---|
212 | { |
---|
213 | cache = 0; |
---|
214 | what = originalIncident->Get4Momentum().vect(); |
---|
215 | |
---|
216 | G4ReactionProduct leadingStrangeParticle; |
---|
217 | |
---|
218 | // strangeProduction.ReactionStage(originalIncident, modifiedOriginal, |
---|
219 | // incidentHasChanged, originalTarget, |
---|
220 | // targetParticle, targetHasChanged, |
---|
221 | // targetNucleus, currentParticle, |
---|
222 | // vec, vecLen, |
---|
223 | // false, leadingStrangeParticle); |
---|
224 | |
---|
225 | if( quasiElastic ) |
---|
226 | { |
---|
227 | twoBody.ReactionStage(originalIncident, modifiedOriginal, |
---|
228 | incidentHasChanged, originalTarget, |
---|
229 | targetParticle, targetHasChanged, |
---|
230 | targetNucleus, currentParticle, |
---|
231 | vec, vecLen, |
---|
232 | false, leadingStrangeParticle); |
---|
233 | return; |
---|
234 | } |
---|
235 | |
---|
236 | G4bool leadFlag = MarkLeadingStrangeParticle(currentParticle, |
---|
237 | targetParticle, |
---|
238 | leadingStrangeParticle ); |
---|
239 | // |
---|
240 | // Note: the number of secondaries can be reduced in GenerateXandPt |
---|
241 | // and TwoCluster |
---|
242 | // |
---|
243 | G4bool finishedGenXPt = false; |
---|
244 | G4bool annihilation = false; |
---|
245 | if( originalIncident->GetDefinition()->GetPDGEncoding() < 0 && |
---|
246 | currentParticle.GetMass() == 0.0 && targetParticle.GetMass() == 0.0 ) |
---|
247 | { |
---|
248 | // original was an anti-particle and annihilation has taken place |
---|
249 | annihilation = true; |
---|
250 | G4double ekcor = 1.0; |
---|
251 | G4double ek = originalIncident->GetKineticEnergy(); |
---|
252 | G4double ekOrg = ek; |
---|
253 | |
---|
254 | const G4double tarmas = originalTarget->GetDefinition()->GetPDGMass(); |
---|
255 | if( ek > 1.0*GeV )ekcor = 1./(ek/GeV); |
---|
256 | const G4double atomicWeight = targetNucleus.GetN(); |
---|
257 | ek = 2*tarmas + ek*(1.+ekcor/atomicWeight); |
---|
258 | G4double tkin = targetNucleus.Cinema(ek); |
---|
259 | ek += tkin; |
---|
260 | ekOrg += tkin; |
---|
261 | // modifiedOriginal.SetKineticEnergy( ekOrg ); |
---|
262 | // |
---|
263 | // evaporation -- re-calculate black track energies |
---|
264 | // this was Done already just before the cascade |
---|
265 | // |
---|
266 | tkin = targetNucleus.AnnihilationEvaporationEffects(ek, ekOrg); |
---|
267 | ekOrg -= tkin; |
---|
268 | ekOrg = std::max( 0.0001*GeV, ekOrg ); |
---|
269 | modifiedOriginal.SetKineticEnergy( ekOrg ); |
---|
270 | G4double amas = originalIncident->GetDefinition()->GetPDGMass(); |
---|
271 | G4double et = ekOrg + amas; |
---|
272 | G4double p = std::sqrt( std::abs(et*et-amas*amas) ); |
---|
273 | G4double pp = modifiedOriginal.GetMomentum().mag(); |
---|
274 | if( pp > 0.0 ) |
---|
275 | { |
---|
276 | G4ThreeVector momentum = modifiedOriginal.GetMomentum(); |
---|
277 | modifiedOriginal.SetMomentum( momentum * (p/pp) ); |
---|
278 | } |
---|
279 | if( ekOrg <= 0.0001 ) |
---|
280 | { |
---|
281 | modifiedOriginal.SetKineticEnergy( 0.0 ); |
---|
282 | modifiedOriginal.SetMomentum( 0.0, 0.0, 0.0 ); |
---|
283 | } |
---|
284 | } |
---|
285 | |
---|
286 | // twsup gives percentage of time two-cluster model is called |
---|
287 | |
---|
288 | const G4double twsup[] = { 1.0, 0.7, 0.5, 0.3, 0.2, 0.1 }; |
---|
289 | G4double rand1 = G4UniformRand(); |
---|
290 | G4double rand2 = G4UniformRand(); |
---|
291 | |
---|
292 | // Cache current, target, and secondaries |
---|
293 | G4ReactionProduct saveCurrent = currentParticle; |
---|
294 | G4ReactionProduct saveTarget = targetParticle; |
---|
295 | std::vector<G4ReactionProduct> savevec; |
---|
296 | for (G4int i = 0; i < vecLen; i++) savevec.push_back(*vec[i]); |
---|
297 | |
---|
298 | // Call fragmentation code if |
---|
299 | // 1) there is annihilation, or |
---|
300 | // 2) there are more than 5 secondaries, or |
---|
301 | // 3) incident KE is > 1 GeV AND |
---|
302 | // ( incident is a kaon AND rand < 0.5 OR twsup ) |
---|
303 | // |
---|
304 | |
---|
305 | if( annihilation || vecLen > 5 || |
---|
306 | ( modifiedOriginal.GetKineticEnergy()/GeV >= 1.0 && |
---|
307 | |
---|
308 | (((originalIncident->GetDefinition() == G4KaonPlus::KaonPlus() || |
---|
309 | originalIncident->GetDefinition() == G4KaonMinus::KaonMinus() || |
---|
310 | originalIncident->GetDefinition() == G4KaonZeroLong::KaonZeroLong() || |
---|
311 | originalIncident->GetDefinition() == G4KaonZeroShort::KaonZeroShort()) && |
---|
312 | rand1 < 0.5) |
---|
313 | || rand2 > twsup[vecLen]) ) ) |
---|
314 | |
---|
315 | finishedGenXPt = |
---|
316 | fragmentation.ReactionStage(originalIncident, modifiedOriginal, |
---|
317 | incidentHasChanged, originalTarget, |
---|
318 | targetParticle, targetHasChanged, |
---|
319 | targetNucleus, currentParticle, |
---|
320 | vec, vecLen, |
---|
321 | leadFlag, leadingStrangeParticle); |
---|
322 | |
---|
323 | if (finishedGenXPt) return; |
---|
324 | |
---|
325 | G4bool finishedTwoClu = false; |
---|
326 | |
---|
327 | if (modifiedOriginal.GetTotalMomentum() < 1.0) { |
---|
328 | for (G4int i = 0; i < vecLen; i++) delete vec[i]; |
---|
329 | vecLen = 0; |
---|
330 | |
---|
331 | } else { |
---|
332 | // Occaisionally, GenerateXandPt will fail in the annihilation channel. |
---|
333 | // Restore current, target and secondaries to pre-GenerateXandPt state |
---|
334 | // before trying annihilation in TwoCluster |
---|
335 | |
---|
336 | if (!finishedGenXPt && annihilation) { |
---|
337 | currentParticle = saveCurrent; |
---|
338 | targetParticle = saveTarget; |
---|
339 | for (G4int i = 0; i < vecLen; i++) delete vec[i]; |
---|
340 | vecLen = 0; |
---|
341 | vec.Initialize( 0 ); |
---|
342 | for (G4int i = 0; i < G4int(savevec.size()); i++) { |
---|
343 | G4ReactionProduct* p = new G4ReactionProduct; |
---|
344 | *p = savevec[i]; |
---|
345 | vec.SetElement( vecLen++, p ); |
---|
346 | } |
---|
347 | } |
---|
348 | |
---|
349 | // Big violations of energy conservation in this method - don't use |
---|
350 | // |
---|
351 | // pionSuppression.ReactionStage(originalIncident, modifiedOriginal, |
---|
352 | // incidentHasChanged, originalTarget, |
---|
353 | // targetParticle, targetHasChanged, |
---|
354 | // targetNucleus, currentParticle, |
---|
355 | // vec, vecLen, |
---|
356 | // false, leadingStrangeParticle); |
---|
357 | |
---|
358 | try |
---|
359 | { |
---|
360 | finishedTwoClu = |
---|
361 | twoCluster.ReactionStage(originalIncident, modifiedOriginal, |
---|
362 | incidentHasChanged, originalTarget, |
---|
363 | targetParticle, targetHasChanged, |
---|
364 | targetNucleus, currentParticle, |
---|
365 | vec, vecLen, |
---|
366 | leadFlag, leadingStrangeParticle); |
---|
367 | } |
---|
368 | catch(G4HadReentrentException aC) |
---|
369 | { |
---|
370 | aC.Report(G4cout); |
---|
371 | throw G4HadReentrentException(__FILE__, __LINE__, "Failing to calculate momenta"); |
---|
372 | } |
---|
373 | } |
---|
374 | |
---|
375 | if (finishedTwoClu) return; |
---|
376 | |
---|
377 | twoBody.ReactionStage(originalIncident, modifiedOriginal, |
---|
378 | incidentHasChanged, originalTarget, |
---|
379 | targetParticle, targetHasChanged, |
---|
380 | targetNucleus, currentParticle, |
---|
381 | vec, vecLen, |
---|
382 | false, leadingStrangeParticle); |
---|
383 | } |
---|
384 | |
---|
385 | /* |
---|
386 | void G4RPGInelastic:: |
---|
387 | Rotate(G4FastVector<G4ReactionProduct,256> &vec, G4int &vecLen) |
---|
388 | { |
---|
389 | G4double rotation = 2.*pi*G4UniformRand(); |
---|
390 | cache = rotation; |
---|
391 | G4int i; |
---|
392 | for( i=0; i<vecLen; ++i ) |
---|
393 | { |
---|
394 | G4ThreeVector momentum = vec[i]->GetMomentum(); |
---|
395 | momentum = momentum.rotate(rotation, what); |
---|
396 | vec[i]->SetMomentum(momentum); |
---|
397 | } |
---|
398 | } |
---|
399 | */ |
---|
400 | |
---|
401 | void |
---|
402 | G4RPGInelastic::SetUpChange(G4FastVector<G4ReactionProduct,256>& vec, |
---|
403 | G4int& vecLen, |
---|
404 | G4ReactionProduct& currentParticle, |
---|
405 | G4ReactionProduct& targetParticle, |
---|
406 | G4bool& incidentHasChanged ) |
---|
407 | { |
---|
408 | theParticleChange.Clear(); |
---|
409 | G4ParticleDefinition* aKaonZL = G4KaonZeroLong::KaonZeroLong(); |
---|
410 | G4ParticleDefinition* aKaonZS = G4KaonZeroShort::KaonZeroShort(); |
---|
411 | G4int i; |
---|
412 | |
---|
413 | if (currentParticle.GetDefinition() == particleDef[k0]) { |
---|
414 | if (G4UniformRand() < 0.5) { |
---|
415 | currentParticle.SetDefinitionAndUpdateE(aKaonZL); |
---|
416 | incidentHasChanged = true; |
---|
417 | } else { |
---|
418 | currentParticle.SetDefinitionAndUpdateE(aKaonZS); |
---|
419 | } |
---|
420 | } else if (currentParticle.GetDefinition() == particleDef[k0b]) { |
---|
421 | if (G4UniformRand() < 0.5) { |
---|
422 | currentParticle.SetDefinitionAndUpdateE(aKaonZL); |
---|
423 | } else { |
---|
424 | currentParticle.SetDefinitionAndUpdateE(aKaonZS); |
---|
425 | incidentHasChanged = true; |
---|
426 | } |
---|
427 | } |
---|
428 | |
---|
429 | if (targetParticle.GetDefinition() == particleDef[k0] || |
---|
430 | targetParticle.GetDefinition() == particleDef[k0b] ) { |
---|
431 | if (G4UniformRand() < 0.5) { |
---|
432 | targetParticle.SetDefinitionAndUpdateE(aKaonZL); |
---|
433 | } else { |
---|
434 | targetParticle.SetDefinitionAndUpdateE(aKaonZS); |
---|
435 | } |
---|
436 | } |
---|
437 | |
---|
438 | for (i = 0; i < vecLen; ++i) { |
---|
439 | if (vec[i]->GetDefinition() == particleDef[k0] || |
---|
440 | vec[i]->GetDefinition() == particleDef[k0b] ) { |
---|
441 | if (G4UniformRand() < 0.5) { |
---|
442 | vec[i]->SetDefinitionAndUpdateE(aKaonZL); |
---|
443 | } else { |
---|
444 | vec[i]->SetDefinitionAndUpdateE(aKaonZS); |
---|
445 | } |
---|
446 | } |
---|
447 | } |
---|
448 | |
---|
449 | if (incidentHasChanged) { |
---|
450 | G4DynamicParticle* p0 = new G4DynamicParticle; |
---|
451 | p0->SetDefinition(currentParticle.GetDefinition() ); |
---|
452 | p0->SetMomentum(currentParticle.GetMomentum() ); |
---|
453 | theParticleChange.AddSecondary( p0 ); |
---|
454 | theParticleChange.SetStatusChange( stopAndKill ); |
---|
455 | theParticleChange.SetEnergyChange( 0.0 ); |
---|
456 | |
---|
457 | } else { |
---|
458 | G4double p = currentParticle.GetMomentum().mag()/MeV; |
---|
459 | G4ThreeVector m = currentParticle.GetMomentum(); |
---|
460 | if (p > DBL_MIN) |
---|
461 | theParticleChange.SetMomentumChange( m.x()/p, m.y()/p, m.z()/p ); |
---|
462 | else |
---|
463 | theParticleChange.SetMomentumChange( 0.0, 0.0, 1.0 ); |
---|
464 | |
---|
465 | G4double aE = currentParticle.GetKineticEnergy(); |
---|
466 | if (std::fabs(aE)<.1*eV) aE=.1*eV; |
---|
467 | theParticleChange.SetEnergyChange( aE ); |
---|
468 | } |
---|
469 | |
---|
470 | if (targetParticle.GetMass() > 0.0) // Tgt particle can be eliminated in TwoBody |
---|
471 | { |
---|
472 | G4ThreeVector momentum = targetParticle.GetMomentum(); |
---|
473 | momentum = momentum.rotate(cache, what); |
---|
474 | G4double targKE = targetParticle.GetKineticEnergy(); |
---|
475 | G4ThreeVector dir(0.0, 0.0, 1.0); |
---|
476 | if (targKE < DBL_MIN) |
---|
477 | targKE = DBL_MIN; |
---|
478 | else |
---|
479 | dir = momentum/momentum.mag(); |
---|
480 | |
---|
481 | G4DynamicParticle* p1 = |
---|
482 | new G4DynamicParticle(targetParticle.GetDefinition(), dir, targKE); |
---|
483 | |
---|
484 | theParticleChange.AddSecondary( p1 ); |
---|
485 | } |
---|
486 | |
---|
487 | G4DynamicParticle* p; |
---|
488 | for (i = 0; i < vecLen; ++i) { |
---|
489 | G4double secKE = vec[i]->GetKineticEnergy(); |
---|
490 | G4ThreeVector momentum = vec[i]->GetMomentum(); |
---|
491 | G4ThreeVector dir(0.0, 0.0, 1.0); |
---|
492 | if (secKE < DBL_MIN) |
---|
493 | secKE = DBL_MIN; |
---|
494 | else |
---|
495 | dir = momentum/momentum.mag(); |
---|
496 | |
---|
497 | p = new G4DynamicParticle(vec[i]->GetDefinition(), dir, secKE); |
---|
498 | theParticleChange.AddSecondary( p ); |
---|
499 | delete vec[i]; |
---|
500 | } |
---|
501 | } |
---|
502 | |
---|
503 | |
---|
504 | std::pair<G4int, G4double> |
---|
505 | G4RPGInelastic::interpolateEnergy(G4double e) const |
---|
506 | { |
---|
507 | G4int index = 29; |
---|
508 | G4double fraction = 0.0; |
---|
509 | |
---|
510 | for (G4int i = 1; i < 30; i++) { |
---|
511 | if (e < energyScale[i]) { |
---|
512 | index = i-1; |
---|
513 | fraction = (e - energyScale[index]) / (energyScale[i] - energyScale[index]); |
---|
514 | break; |
---|
515 | } |
---|
516 | } |
---|
517 | return std::pair<G4int, G4double>(index, fraction); |
---|
518 | } |
---|
519 | |
---|
520 | |
---|
521 | G4int |
---|
522 | G4RPGInelastic::sampleFlat(std::vector<G4double> sigma) const |
---|
523 | { |
---|
524 | G4int i; |
---|
525 | G4double sum(0.); |
---|
526 | for (i = 0; i < G4int(sigma.size()); i++) sum += sigma[i]; |
---|
527 | |
---|
528 | G4double fsum = sum*G4UniformRand(); |
---|
529 | G4double partialSum = 0.0; |
---|
530 | G4int channel = 0; |
---|
531 | |
---|
532 | for (i = 0; i < G4int(sigma.size()); i++) { |
---|
533 | partialSum += sigma[i]; |
---|
534 | if (fsum < partialSum) { |
---|
535 | channel = i; |
---|
536 | break; |
---|
537 | } |
---|
538 | } |
---|
539 | |
---|
540 | return channel; |
---|
541 | } |
---|
542 | |
---|
543 | |
---|
544 | void G4RPGInelastic::CheckQnums(G4FastVector<G4ReactionProduct,256> &vec, |
---|
545 | G4int &vecLen, |
---|
546 | G4ReactionProduct ¤tParticle, |
---|
547 | G4ReactionProduct &targetParticle, |
---|
548 | G4double Q, G4double B, G4double S) |
---|
549 | { |
---|
550 | G4ParticleDefinition* projDef = currentParticle.GetDefinition(); |
---|
551 | G4ParticleDefinition* targDef = targetParticle.GetDefinition(); |
---|
552 | G4double chargeSum = projDef->GetPDGCharge() + targDef->GetPDGCharge(); |
---|
553 | G4double baryonSum = projDef->GetBaryonNumber() + targDef->GetBaryonNumber(); |
---|
554 | G4double strangenessSum = projDef->GetQuarkContent(3) - |
---|
555 | projDef->GetAntiQuarkContent(3) + |
---|
556 | targDef->GetQuarkContent(3) - |
---|
557 | targDef->GetAntiQuarkContent(3); |
---|
558 | |
---|
559 | G4ParticleDefinition* secDef = 0; |
---|
560 | for (G4int i = 0; i < vecLen; i++) { |
---|
561 | secDef = vec[i]->GetDefinition(); |
---|
562 | chargeSum += secDef->GetPDGCharge(); |
---|
563 | baryonSum += secDef->GetBaryonNumber(); |
---|
564 | strangenessSum += secDef->GetQuarkContent(3) |
---|
565 | - secDef->GetAntiQuarkContent(3); |
---|
566 | } |
---|
567 | |
---|
568 | G4bool OK = true; |
---|
569 | if (chargeSum != Q) { |
---|
570 | G4cout << " Charge not conserved " << G4endl; |
---|
571 | OK = false; |
---|
572 | } |
---|
573 | if (baryonSum != B) { |
---|
574 | G4cout << " Baryon number not conserved " << G4endl; |
---|
575 | OK = false; |
---|
576 | } |
---|
577 | if (strangenessSum != S) { |
---|
578 | G4cout << " Strangeness not conserved " << G4endl; |
---|
579 | OK = false; |
---|
580 | } |
---|
581 | |
---|
582 | if (!OK) { |
---|
583 | G4cout << " projectile: " << projDef->GetParticleName() |
---|
584 | << " target: " << targDef->GetParticleName() << G4endl; |
---|
585 | for (G4int i = 0; i < vecLen; i++) { |
---|
586 | secDef = vec[i]->GetDefinition(); |
---|
587 | G4cout << secDef->GetParticleName() << " " ; |
---|
588 | } |
---|
589 | G4cout << G4endl; |
---|
590 | } |
---|
591 | |
---|
592 | } |
---|
593 | |
---|
594 | |
---|
595 | const G4double G4RPGInelastic::energyScale[30] = { |
---|
596 | 0.0, 0.01, 0.013, 0.018, 0.024, 0.032, 0.042, 0.056, 0.075, 0.1, |
---|
597 | 0.13, 0.18, 0.24, 0.32, 0.42, 0.56, 0.75, 1.0, 1.3, 1.8, |
---|
598 | 2.4, 3.2, 4.2, 5.6, 7.5, 10.0, 13.0, 18.0, 24.0, 32.0 }; |
---|
599 | |
---|
600 | |
---|
601 | /* end of file */ |
---|