[819] | 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 | // |
---|
[962] | 26 | // $Id: G4RPGInelastic.cc,v 1.6 2008/03/22 00:03:24 dennis Exp $ |
---|
[1007] | 27 | // GEANT4 tag $Name: geant4-09-02 $ |
---|
[819] | 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 | G4double G4RPGInelastic::Pmltpc(G4int np, G4int nm, G4int nz, |
---|
| 38 | G4int n, G4double b, G4double c) |
---|
| 39 | { |
---|
| 40 | const G4double expxu = 82.; // upper bound for arg. of exp |
---|
| 41 | const G4double expxl = -expxu; // lower bound for arg. of exp |
---|
| 42 | G4double npf = 0.0; |
---|
| 43 | G4double nmf = 0.0; |
---|
| 44 | G4double nzf = 0.0; |
---|
| 45 | G4int i; |
---|
| 46 | for( i=2; i<=np; i++ )npf += std::log((double)i); |
---|
| 47 | for( i=2; i<=nm; i++ )nmf += std::log((double)i); |
---|
| 48 | for( i=2; i<=nz; i++ )nzf += std::log((double)i); |
---|
| 49 | G4double r; |
---|
| 50 | r = std::min( expxu, std::max( expxl, -(np-nm+nz+b)*(np-nm+nz+b)/(2*c*c*n*n)-npf-nmf-nzf ) ); |
---|
| 51 | return std::exp(r); |
---|
| 52 | } |
---|
| 53 | |
---|
| 54 | |
---|
| 55 | G4int G4RPGInelastic::Factorial( G4int n ) |
---|
| 56 | { |
---|
| 57 | G4int m = std::min(n,10); |
---|
| 58 | G4int result = 1; |
---|
| 59 | if( m <= 1 )return result; |
---|
| 60 | for( G4int i=2; i<=m; ++i )result *= i; |
---|
| 61 | return result; |
---|
| 62 | } |
---|
| 63 | |
---|
| 64 | |
---|
| 65 | G4bool G4RPGInelastic::MarkLeadingStrangeParticle( |
---|
| 66 | const G4ReactionProduct ¤tParticle, |
---|
| 67 | const G4ReactionProduct &targetParticle, |
---|
| 68 | G4ReactionProduct &leadParticle ) |
---|
| 69 | { |
---|
| 70 | // The following was in GenerateXandPt and TwoCluster. |
---|
| 71 | // Add a parameter to the GenerateXandPt function telling it about the |
---|
| 72 | // strange particle. |
---|
| 73 | // |
---|
| 74 | // Assumes that the original particle was a strange particle |
---|
| 75 | // |
---|
| 76 | G4bool lead = false; |
---|
| 77 | if( (currentParticle.GetMass() >= G4KaonPlus::KaonPlus()->GetPDGMass()) && |
---|
| 78 | (currentParticle.GetDefinition() != G4Proton::Proton()) && |
---|
| 79 | (currentParticle.GetDefinition() != G4Neutron::Neutron()) ) |
---|
| 80 | { |
---|
| 81 | lead = true; |
---|
| 82 | leadParticle = currentParticle; // set lead to the incident particle |
---|
| 83 | } |
---|
| 84 | else if( (targetParticle.GetMass() >= G4KaonPlus::KaonPlus()->GetPDGMass()) && |
---|
| 85 | (targetParticle.GetDefinition() != G4Proton::Proton()) && |
---|
| 86 | (targetParticle.GetDefinition() != G4Neutron::Neutron()) ) |
---|
| 87 | { |
---|
| 88 | lead = true; |
---|
| 89 | leadParticle = targetParticle; // set lead to the target particle |
---|
| 90 | } |
---|
| 91 | return lead; |
---|
| 92 | } |
---|
| 93 | |
---|
| 94 | |
---|
| 95 | void G4RPGInelastic::SetUpPions(const G4int np, const G4int nm, |
---|
| 96 | const G4int nz, |
---|
| 97 | G4FastVector<G4ReactionProduct,256> &vec, |
---|
| 98 | G4int &vecLen) |
---|
| 99 | { |
---|
| 100 | if( np+nm+nz == 0 )return; |
---|
| 101 | G4int i; |
---|
| 102 | G4ReactionProduct *p; |
---|
| 103 | for( i=0; i<np; ++i ) |
---|
| 104 | { |
---|
| 105 | p = new G4ReactionProduct; |
---|
| 106 | p->SetDefinition( G4PionPlus::PionPlus() ); |
---|
| 107 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
---|
| 108 | vec.SetElement( vecLen++, p ); |
---|
| 109 | } |
---|
| 110 | for( i=np; i<np+nm; ++i ) |
---|
| 111 | { |
---|
| 112 | p = new G4ReactionProduct; |
---|
| 113 | p->SetDefinition( G4PionMinus::PionMinus() ); |
---|
| 114 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
---|
| 115 | vec.SetElement( vecLen++, p ); |
---|
| 116 | } |
---|
| 117 | for( i=np+nm; i<np+nm+nz; ++i ) |
---|
| 118 | { |
---|
| 119 | p = new G4ReactionProduct; |
---|
| 120 | p->SetDefinition( G4PionZero::PionZero() ); |
---|
| 121 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
---|
| 122 | vec.SetElement( vecLen++, p ); |
---|
| 123 | } |
---|
| 124 | } |
---|
| 125 | |
---|
| 126 | |
---|
| 127 | void G4RPGInelastic::GetNormalizationConstant( |
---|
| 128 | const G4double energy, // MeV, <0 means annihilation channels |
---|
| 129 | G4double &n, |
---|
| 130 | G4double &anpn ) |
---|
| 131 | { |
---|
| 132 | const G4double expxu = 82.; // upper bound for arg. of exp |
---|
| 133 | const G4double expxl = -expxu; // lower bound for arg. of exp |
---|
| 134 | const G4int numSec = 60; |
---|
| 135 | // |
---|
| 136 | // the only difference between the calculation for annihilation channels |
---|
| 137 | // and normal is the starting value, iBegin, for the loop below |
---|
| 138 | // |
---|
| 139 | G4int iBegin = 1; |
---|
| 140 | G4double en = energy; |
---|
| 141 | if( energy < 0.0 ) |
---|
| 142 | { |
---|
| 143 | iBegin = 2; |
---|
| 144 | en *= -1.0; |
---|
| 145 | } |
---|
| 146 | // |
---|
| 147 | // number of total particles vs. centre of mass Energy - 2*proton mass |
---|
| 148 | // |
---|
| 149 | G4double aleab = std::log(en/GeV); |
---|
| 150 | n = 3.62567 + aleab*(0.665843 + aleab*(0.336514 + aleab*(0.117712 + 0.0136912*aleab))); |
---|
| 151 | n -= 2.0; |
---|
| 152 | // |
---|
| 153 | // normalization constant for kno-distribution |
---|
| 154 | // |
---|
| 155 | anpn = 0.0; |
---|
| 156 | G4double test, temp; |
---|
| 157 | for( G4int i=iBegin; i<=numSec; ++i ) |
---|
| 158 | { |
---|
| 159 | temp = pi*i/(2.0*n*n); |
---|
| 160 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(i*i)/(n*n) ) ) ); |
---|
| 161 | if( temp < 1.0 ) |
---|
| 162 | { |
---|
| 163 | if( test >= 1.0e-10 )anpn += temp*test; |
---|
| 164 | } |
---|
| 165 | else |
---|
| 166 | anpn += temp*test; |
---|
| 167 | } |
---|
| 168 | } |
---|
| 169 | |
---|
[962] | 170 | void |
---|
| 171 | G4RPGInelastic::CalculateMomenta(G4FastVector<G4ReactionProduct,256>& vec, |
---|
| 172 | G4int& vecLen, |
---|
| 173 | const G4HadProjectile* originalIncident, |
---|
| 174 | const G4DynamicParticle* originalTarget, |
---|
| 175 | G4ReactionProduct& modifiedOriginal, |
---|
| 176 | G4Nucleus& targetNucleus, |
---|
| 177 | G4ReactionProduct& currentParticle, |
---|
| 178 | G4ReactionProduct& targetParticle, |
---|
| 179 | G4bool& incidentHasChanged, |
---|
| 180 | G4bool& targetHasChanged, |
---|
| 181 | G4bool quasiElastic) |
---|
[819] | 182 | { |
---|
| 183 | cache = 0; |
---|
| 184 | what = originalIncident->Get4Momentum().vect(); |
---|
| 185 | |
---|
| 186 | G4ReactionProduct leadingStrangeParticle; |
---|
| 187 | |
---|
[962] | 188 | // strangeProduction.ReactionStage(originalIncident, modifiedOriginal, |
---|
| 189 | // incidentHasChanged, originalTarget, |
---|
| 190 | // targetParticle, targetHasChanged, |
---|
| 191 | // targetNucleus, currentParticle, |
---|
| 192 | // vec, vecLen, |
---|
| 193 | // false, leadingStrangeParticle); |
---|
[819] | 194 | |
---|
| 195 | if( quasiElastic ) |
---|
| 196 | { |
---|
| 197 | twoBody.ReactionStage(originalIncident, modifiedOriginal, |
---|
| 198 | incidentHasChanged, originalTarget, |
---|
| 199 | targetParticle, targetHasChanged, |
---|
| 200 | targetNucleus, currentParticle, |
---|
| 201 | vec, vecLen, |
---|
| 202 | false, leadingStrangeParticle); |
---|
| 203 | return; |
---|
| 204 | } |
---|
| 205 | |
---|
| 206 | G4bool leadFlag = MarkLeadingStrangeParticle(currentParticle, |
---|
| 207 | targetParticle, |
---|
| 208 | leadingStrangeParticle ); |
---|
| 209 | // |
---|
| 210 | // Note: the number of secondaries can be reduced in GenerateXandPt |
---|
| 211 | // and TwoCluster |
---|
| 212 | // |
---|
| 213 | G4bool finishedGenXPt = false; |
---|
| 214 | G4bool annihilation = false; |
---|
| 215 | if( originalIncident->GetDefinition()->GetPDGEncoding() < 0 && |
---|
| 216 | currentParticle.GetMass() == 0.0 && targetParticle.GetMass() == 0.0 ) |
---|
| 217 | { |
---|
| 218 | // original was an anti-particle and annihilation has taken place |
---|
| 219 | annihilation = true; |
---|
| 220 | G4double ekcor = 1.0; |
---|
| 221 | G4double ek = originalIncident->GetKineticEnergy(); |
---|
| 222 | G4double ekOrg = ek; |
---|
| 223 | |
---|
| 224 | const G4double tarmas = originalTarget->GetDefinition()->GetPDGMass(); |
---|
| 225 | if( ek > 1.0*GeV )ekcor = 1./(ek/GeV); |
---|
| 226 | const G4double atomicWeight = targetNucleus.GetN(); |
---|
| 227 | ek = 2*tarmas + ek*(1.+ekcor/atomicWeight); |
---|
| 228 | G4double tkin = targetNucleus.Cinema(ek); |
---|
| 229 | ek += tkin; |
---|
| 230 | ekOrg += tkin; |
---|
| 231 | // modifiedOriginal.SetKineticEnergy( ekOrg ); |
---|
| 232 | // |
---|
| 233 | // evaporation -- re-calculate black track energies |
---|
| 234 | // this was Done already just before the cascade |
---|
| 235 | // |
---|
| 236 | tkin = targetNucleus.AnnihilationEvaporationEffects(ek, ekOrg); |
---|
| 237 | ekOrg -= tkin; |
---|
| 238 | ekOrg = std::max( 0.0001*GeV, ekOrg ); |
---|
| 239 | modifiedOriginal.SetKineticEnergy( ekOrg ); |
---|
| 240 | G4double amas = originalIncident->GetDefinition()->GetPDGMass(); |
---|
| 241 | G4double et = ekOrg + amas; |
---|
| 242 | G4double p = std::sqrt( std::abs(et*et-amas*amas) ); |
---|
| 243 | G4double pp = modifiedOriginal.GetMomentum().mag(); |
---|
| 244 | if( pp > 0.0 ) |
---|
| 245 | { |
---|
| 246 | G4ThreeVector momentum = modifiedOriginal.GetMomentum(); |
---|
| 247 | modifiedOriginal.SetMomentum( momentum * (p/pp) ); |
---|
| 248 | } |
---|
| 249 | if( ekOrg <= 0.0001 ) |
---|
| 250 | { |
---|
| 251 | modifiedOriginal.SetKineticEnergy( 0.0 ); |
---|
| 252 | modifiedOriginal.SetMomentum( 0.0, 0.0, 0.0 ); |
---|
| 253 | } |
---|
| 254 | } |
---|
| 255 | |
---|
| 256 | // twsup gives percentage of time two-cluster model is called |
---|
| 257 | |
---|
| 258 | const G4double twsup[] = { 1.0, 0.7, 0.5, 0.3, 0.2, 0.1 }; |
---|
| 259 | G4double rand1 = G4UniformRand(); |
---|
| 260 | G4double rand2 = G4UniformRand(); |
---|
| 261 | |
---|
| 262 | // Cache current, target, and secondaries |
---|
| 263 | G4ReactionProduct saveCurrent = currentParticle; |
---|
| 264 | G4ReactionProduct saveTarget = targetParticle; |
---|
| 265 | std::vector<G4ReactionProduct> savevec; |
---|
| 266 | for (G4int i = 0; i < vecLen; i++) savevec.push_back(*vec[i]); |
---|
| 267 | |
---|
[962] | 268 | // Call fragmentation code if |
---|
| 269 | // 1) there is annihilation, or |
---|
| 270 | // 2) there are more than 5 secondaries, or |
---|
| 271 | // 3) incident KE is > 1 GeV AND |
---|
| 272 | // ( incident is a kaon AND rand < 0.5 OR twsup ) |
---|
| 273 | // |
---|
| 274 | |
---|
| 275 | if( annihilation || vecLen > 5 || |
---|
| 276 | ( modifiedOriginal.GetKineticEnergy()/GeV >= 1.0 && |
---|
| 277 | |
---|
[819] | 278 | (((originalIncident->GetDefinition() == G4KaonPlus::KaonPlus() || |
---|
| 279 | originalIncident->GetDefinition() == G4KaonMinus::KaonMinus() || |
---|
| 280 | originalIncident->GetDefinition() == G4KaonZeroLong::KaonZeroLong() || |
---|
| 281 | originalIncident->GetDefinition() == G4KaonZeroShort::KaonZeroShort()) && |
---|
[962] | 282 | rand1 < 0.5) |
---|
| 283 | || rand2 > twsup[vecLen]) ) ) |
---|
[819] | 284 | |
---|
| 285 | finishedGenXPt = |
---|
| 286 | fragmentation.ReactionStage(originalIncident, modifiedOriginal, |
---|
| 287 | incidentHasChanged, originalTarget, |
---|
| 288 | targetParticle, targetHasChanged, |
---|
| 289 | targetNucleus, currentParticle, |
---|
| 290 | vec, vecLen, |
---|
| 291 | leadFlag, leadingStrangeParticle); |
---|
| 292 | |
---|
[962] | 293 | if (finishedGenXPt) return; |
---|
[819] | 294 | |
---|
| 295 | G4bool finishedTwoClu = false; |
---|
[962] | 296 | |
---|
| 297 | if (modifiedOriginal.GetTotalMomentum() < 1.0) { |
---|
| 298 | for (G4int i = 0; i < vecLen; i++) delete vec[i]; |
---|
[819] | 299 | vecLen = 0; |
---|
[962] | 300 | |
---|
| 301 | } else { |
---|
[819] | 302 | // Occaisionally, GenerateXandPt will fail in the annihilation channel. |
---|
| 303 | // Restore current, target and secondaries to pre-GenerateXandPt state |
---|
| 304 | // before trying annihilation in TwoCluster |
---|
| 305 | |
---|
| 306 | if (!finishedGenXPt && annihilation) { |
---|
| 307 | currentParticle = saveCurrent; |
---|
| 308 | targetParticle = saveTarget; |
---|
| 309 | for (G4int i = 0; i < vecLen; i++) delete vec[i]; |
---|
| 310 | vecLen = 0; |
---|
| 311 | vec.Initialize( 0 ); |
---|
| 312 | for (G4int i = 0; i < G4int(savevec.size()); i++) { |
---|
| 313 | G4ReactionProduct* p = new G4ReactionProduct; |
---|
| 314 | *p = savevec[i]; |
---|
| 315 | vec.SetElement( vecLen++, p ); |
---|
| 316 | } |
---|
| 317 | } |
---|
| 318 | |
---|
[962] | 319 | // Big violations of energy conservation in this method - don't use |
---|
| 320 | // |
---|
| 321 | // pionSuppression.ReactionStage(originalIncident, modifiedOriginal, |
---|
| 322 | // incidentHasChanged, originalTarget, |
---|
| 323 | // targetParticle, targetHasChanged, |
---|
| 324 | // targetNucleus, currentParticle, |
---|
| 325 | // vec, vecLen, |
---|
| 326 | // false, leadingStrangeParticle); |
---|
[819] | 327 | |
---|
| 328 | try |
---|
| 329 | { |
---|
| 330 | finishedTwoClu = |
---|
| 331 | twoCluster.ReactionStage(originalIncident, modifiedOriginal, |
---|
| 332 | incidentHasChanged, originalTarget, |
---|
| 333 | targetParticle, targetHasChanged, |
---|
| 334 | targetNucleus, currentParticle, |
---|
| 335 | vec, vecLen, |
---|
| 336 | leadFlag, leadingStrangeParticle); |
---|
| 337 | } |
---|
| 338 | catch(G4HadReentrentException aC) |
---|
| 339 | { |
---|
| 340 | aC.Report(G4cout); |
---|
| 341 | throw G4HadReentrentException(__FILE__, __LINE__, "Failing to calculate momenta"); |
---|
| 342 | } |
---|
| 343 | } |
---|
| 344 | |
---|
[962] | 345 | if (finishedTwoClu) return; |
---|
[819] | 346 | |
---|
| 347 | twoBody.ReactionStage(originalIncident, modifiedOriginal, |
---|
| 348 | incidentHasChanged, originalTarget, |
---|
| 349 | targetParticle, targetHasChanged, |
---|
| 350 | targetNucleus, currentParticle, |
---|
| 351 | vec, vecLen, |
---|
| 352 | false, leadingStrangeParticle); |
---|
| 353 | } |
---|
| 354 | |
---|
[962] | 355 | /* |
---|
[819] | 356 | void G4RPGInelastic:: |
---|
| 357 | Rotate(G4FastVector<G4ReactionProduct,256> &vec, G4int &vecLen) |
---|
| 358 | { |
---|
| 359 | G4double rotation = 2.*pi*G4UniformRand(); |
---|
| 360 | cache = rotation; |
---|
| 361 | G4int i; |
---|
| 362 | for( i=0; i<vecLen; ++i ) |
---|
| 363 | { |
---|
| 364 | G4ThreeVector momentum = vec[i]->GetMomentum(); |
---|
| 365 | momentum = momentum.rotate(rotation, what); |
---|
| 366 | vec[i]->SetMomentum(momentum); |
---|
| 367 | } |
---|
| 368 | } |
---|
[962] | 369 | */ |
---|
[819] | 370 | |
---|
| 371 | void |
---|
[962] | 372 | G4RPGInelastic::SetUpChange(G4FastVector<G4ReactionProduct,256>& vec, |
---|
| 373 | G4int& vecLen, |
---|
| 374 | G4ReactionProduct& currentParticle, |
---|
| 375 | G4ReactionProduct& targetParticle, |
---|
| 376 | G4bool& incidentHasChanged ) |
---|
[819] | 377 | { |
---|
| 378 | theParticleChange.Clear(); |
---|
[962] | 379 | G4ParticleDefinition* aKaonZL = G4KaonZeroLong::KaonZeroLong(); |
---|
| 380 | G4ParticleDefinition* aKaonZS = G4KaonZeroShort::KaonZeroShort(); |
---|
[819] | 381 | G4int i; |
---|
[962] | 382 | |
---|
| 383 | if (currentParticle.GetDefinition() == particleDef[k0]) { |
---|
| 384 | if (G4UniformRand() < 0.5) { |
---|
| 385 | currentParticle.SetDefinitionAndUpdateE(aKaonZL); |
---|
[819] | 386 | incidentHasChanged = true; |
---|
[962] | 387 | } else { |
---|
| 388 | currentParticle.SetDefinitionAndUpdateE(aKaonZS); |
---|
[819] | 389 | } |
---|
[962] | 390 | } else if (currentParticle.GetDefinition() == particleDef[k0b]) { |
---|
| 391 | if (G4UniformRand() < 0.5) { |
---|
| 392 | currentParticle.SetDefinitionAndUpdateE(aKaonZL); |
---|
| 393 | } else { |
---|
| 394 | currentParticle.SetDefinitionAndUpdateE(aKaonZS); |
---|
[819] | 395 | incidentHasChanged = true; |
---|
| 396 | } |
---|
| 397 | } |
---|
| 398 | |
---|
[962] | 399 | if (targetParticle.GetDefinition() == particleDef[k0] || |
---|
| 400 | targetParticle.GetDefinition() == particleDef[k0b] ) { |
---|
| 401 | if (G4UniformRand() < 0.5) { |
---|
| 402 | targetParticle.SetDefinitionAndUpdateE(aKaonZL); |
---|
| 403 | } else { |
---|
| 404 | targetParticle.SetDefinitionAndUpdateE(aKaonZS); |
---|
| 405 | } |
---|
[819] | 406 | } |
---|
[962] | 407 | |
---|
| 408 | for (i = 0; i < vecLen; ++i) { |
---|
| 409 | if (vec[i]->GetDefinition() == particleDef[k0] || |
---|
| 410 | vec[i]->GetDefinition() == particleDef[k0b] ) { |
---|
| 411 | if (G4UniformRand() < 0.5) { |
---|
| 412 | vec[i]->SetDefinitionAndUpdateE(aKaonZL); |
---|
| 413 | } else { |
---|
| 414 | vec[i]->SetDefinitionAndUpdateE(aKaonZS); |
---|
| 415 | } |
---|
[819] | 416 | } |
---|
| 417 | } |
---|
| 418 | |
---|
[962] | 419 | if (incidentHasChanged) { |
---|
[819] | 420 | G4DynamicParticle* p0 = new G4DynamicParticle; |
---|
[962] | 421 | p0->SetDefinition(currentParticle.GetDefinition() ); |
---|
| 422 | p0->SetMomentum(currentParticle.GetMomentum() ); |
---|
[819] | 423 | theParticleChange.AddSecondary( p0 ); |
---|
| 424 | theParticleChange.SetStatusChange( stopAndKill ); |
---|
| 425 | theParticleChange.SetEnergyChange( 0.0 ); |
---|
[962] | 426 | |
---|
| 427 | } else { |
---|
[819] | 428 | G4double p = currentParticle.GetMomentum().mag()/MeV; |
---|
| 429 | G4ThreeVector m = currentParticle.GetMomentum(); |
---|
[962] | 430 | if (p > DBL_MIN) |
---|
[819] | 431 | theParticleChange.SetMomentumChange( m.x()/p, m.y()/p, m.z()/p ); |
---|
| 432 | else |
---|
| 433 | theParticleChange.SetMomentumChange( 0.0, 0.0, 1.0 ); |
---|
| 434 | |
---|
| 435 | G4double aE = currentParticle.GetKineticEnergy(); |
---|
| 436 | if (std::fabs(aE)<.1*eV) aE=.1*eV; |
---|
| 437 | theParticleChange.SetEnergyChange( aE ); |
---|
| 438 | } |
---|
| 439 | |
---|
[962] | 440 | if (targetParticle.GetMass() > 0.0) // Tgt particle can be eliminated in TwoBody |
---|
[819] | 441 | { |
---|
| 442 | G4ThreeVector momentum = targetParticle.GetMomentum(); |
---|
| 443 | momentum = momentum.rotate(cache, what); |
---|
| 444 | G4double targKE = targetParticle.GetKineticEnergy(); |
---|
| 445 | G4ThreeVector dir(0.0, 0.0, 1.0); |
---|
| 446 | if (targKE < DBL_MIN) |
---|
| 447 | targKE = DBL_MIN; |
---|
| 448 | else |
---|
| 449 | dir = momentum/momentum.mag(); |
---|
| 450 | |
---|
| 451 | G4DynamicParticle* p1 = |
---|
| 452 | new G4DynamicParticle(targetParticle.GetDefinition(), dir, targKE); |
---|
| 453 | |
---|
| 454 | theParticleChange.AddSecondary( p1 ); |
---|
| 455 | } |
---|
| 456 | |
---|
| 457 | G4DynamicParticle* p; |
---|
[962] | 458 | for (i = 0; i < vecLen; ++i) { |
---|
[819] | 459 | G4double secKE = vec[i]->GetKineticEnergy(); |
---|
| 460 | G4ThreeVector momentum = vec[i]->GetMomentum(); |
---|
| 461 | G4ThreeVector dir(0.0, 0.0, 1.0); |
---|
| 462 | if (secKE < DBL_MIN) |
---|
| 463 | secKE = DBL_MIN; |
---|
| 464 | else |
---|
| 465 | dir = momentum/momentum.mag(); |
---|
| 466 | |
---|
| 467 | p = new G4DynamicParticle(vec[i]->GetDefinition(), dir, secKE); |
---|
| 468 | theParticleChange.AddSecondary( p ); |
---|
| 469 | delete vec[i]; |
---|
| 470 | } |
---|
| 471 | } |
---|
[962] | 472 | |
---|
| 473 | |
---|
| 474 | std::pair<G4int, G4double> |
---|
| 475 | G4RPGInelastic::interpolateEnergy(G4double e) const |
---|
| 476 | { |
---|
| 477 | G4int index = 29; |
---|
| 478 | G4double fraction = 0.0; |
---|
| 479 | |
---|
| 480 | for (G4int i = 1; i < 30; i++) { |
---|
| 481 | if (e < energyScale[i]) { |
---|
| 482 | index = i-1; |
---|
| 483 | fraction = (e - energyScale[index]) / (energyScale[i] - energyScale[index]); |
---|
| 484 | break; |
---|
| 485 | } |
---|
| 486 | } |
---|
| 487 | return std::pair<G4int, G4double>(index, fraction); |
---|
| 488 | } |
---|
| 489 | |
---|
| 490 | |
---|
| 491 | G4int |
---|
| 492 | G4RPGInelastic::sampleFlat(std::vector<G4double> sigma) const |
---|
| 493 | { |
---|
| 494 | G4int i; |
---|
| 495 | G4double sum(0.); |
---|
| 496 | for (i = 0; i < G4int(sigma.size()); i++) sum += sigma[i]; |
---|
| 497 | |
---|
| 498 | G4double fsum = sum*G4UniformRand(); |
---|
| 499 | G4double partialSum = 0.0; |
---|
| 500 | G4int channel = 0; |
---|
| 501 | |
---|
| 502 | for (i = 0; i < G4int(sigma.size()); i++) { |
---|
| 503 | partialSum += sigma[i]; |
---|
| 504 | if (fsum < partialSum) { |
---|
| 505 | channel = i; |
---|
| 506 | break; |
---|
| 507 | } |
---|
| 508 | } |
---|
| 509 | |
---|
| 510 | return channel; |
---|
| 511 | } |
---|
| 512 | |
---|
| 513 | |
---|
| 514 | void G4RPGInelastic::CheckQnums(G4FastVector<G4ReactionProduct,256> &vec, |
---|
| 515 | G4int &vecLen, |
---|
| 516 | G4ReactionProduct ¤tParticle, |
---|
| 517 | G4ReactionProduct &targetParticle, |
---|
| 518 | G4double Q, G4double B, G4double S) |
---|
| 519 | { |
---|
| 520 | G4ParticleDefinition* projDef = currentParticle.GetDefinition(); |
---|
| 521 | G4ParticleDefinition* targDef = targetParticle.GetDefinition(); |
---|
| 522 | G4double chargeSum = projDef->GetPDGCharge() + targDef->GetPDGCharge(); |
---|
| 523 | G4double baryonSum = projDef->GetBaryonNumber() + targDef->GetBaryonNumber(); |
---|
| 524 | G4double strangenessSum = projDef->GetQuarkContent(3) - |
---|
| 525 | projDef->GetAntiQuarkContent(3) + |
---|
| 526 | targDef->GetQuarkContent(3) - |
---|
| 527 | targDef->GetAntiQuarkContent(3); |
---|
| 528 | |
---|
| 529 | G4ParticleDefinition* secDef = 0; |
---|
| 530 | for (G4int i = 0; i < vecLen; i++) { |
---|
| 531 | secDef = vec[i]->GetDefinition(); |
---|
| 532 | chargeSum += secDef->GetPDGCharge(); |
---|
| 533 | baryonSum += secDef->GetBaryonNumber(); |
---|
| 534 | strangenessSum += secDef->GetQuarkContent(3) |
---|
| 535 | - secDef->GetAntiQuarkContent(3); |
---|
| 536 | } |
---|
| 537 | |
---|
| 538 | G4bool OK = true; |
---|
| 539 | if (chargeSum != Q) { |
---|
| 540 | G4cout << " Charge not conserved " << G4endl; |
---|
| 541 | OK = false; |
---|
| 542 | } |
---|
| 543 | if (baryonSum != B) { |
---|
| 544 | G4cout << " Baryon number not conserved " << G4endl; |
---|
| 545 | OK = false; |
---|
| 546 | } |
---|
| 547 | if (strangenessSum != S) { |
---|
| 548 | G4cout << " Strangeness not conserved " << G4endl; |
---|
| 549 | OK = false; |
---|
| 550 | } |
---|
| 551 | |
---|
| 552 | if (!OK) { |
---|
| 553 | G4cout << " projectile: " << projDef->GetParticleName() |
---|
| 554 | << " target: " << targDef->GetParticleName() << G4endl; |
---|
| 555 | for (G4int i = 0; i < vecLen; i++) { |
---|
| 556 | secDef = vec[i]->GetDefinition(); |
---|
| 557 | G4cout << secDef->GetParticleName() << " " ; |
---|
| 558 | } |
---|
| 559 | G4cout << G4endl; |
---|
| 560 | } |
---|
| 561 | |
---|
| 562 | } |
---|
| 563 | |
---|
| 564 | |
---|
| 565 | const G4double G4RPGInelastic::energyScale[30] = { |
---|
| 566 | 0.0, 0.01, 0.013, 0.018, 0.024, 0.032, 0.042, 0.056, 0.075, 0.1, |
---|
| 567 | 0.13, 0.18, 0.24, 0.32, 0.42, 0.56, 0.75, 1.0, 1.3, 1.8, |
---|
| 568 | 2.4, 3.2, 4.2, 5.6, 7.5, 10.0, 13.0, 18.0, 24.0, 32.0 }; |
---|
| 569 | |
---|
| 570 | G4ParticleDefinition* p0 = G4PionZero::PionZero(); |
---|
| 571 | G4ParticleDefinition* p1 = G4PionPlus::PionPlus(); |
---|
| 572 | G4ParticleDefinition* p2 = G4PionMinus::PionMinus(); |
---|
| 573 | G4ParticleDefinition* p3 = G4KaonPlus::KaonPlus(); |
---|
| 574 | G4ParticleDefinition* p4 = G4KaonMinus::KaonMinus(); |
---|
| 575 | G4ParticleDefinition* p5 = G4KaonZero::KaonZero(); |
---|
| 576 | G4ParticleDefinition* p6 = G4AntiKaonZero::AntiKaonZero(); |
---|
| 577 | G4ParticleDefinition* p7 = G4Proton::Proton(); |
---|
| 578 | G4ParticleDefinition* p8 = G4Neutron::Neutron(); |
---|
| 579 | G4ParticleDefinition* p9 = G4Lambda::Lambda(); |
---|
| 580 | G4ParticleDefinition* p10 = G4SigmaPlus::SigmaPlus(); |
---|
| 581 | G4ParticleDefinition* p11 = G4SigmaZero::SigmaZero(); |
---|
| 582 | G4ParticleDefinition* p12 = G4SigmaMinus::SigmaMinus(); |
---|
| 583 | G4ParticleDefinition* p13 = G4XiZero::XiZero(); |
---|
| 584 | G4ParticleDefinition* p14 = G4XiMinus::XiMinus(); |
---|
| 585 | G4ParticleDefinition* p15 = G4OmegaMinus::OmegaMinus(); |
---|
| 586 | G4ParticleDefinition* p16 = G4AntiProton::AntiProton(); |
---|
| 587 | G4ParticleDefinition* p17 = G4AntiNeutron::AntiNeutron(); |
---|
| 588 | |
---|
| 589 | G4ParticleDefinition* G4RPGInelastic::particleDef[18] = { |
---|
| 590 | p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, |
---|
| 591 | p15, p16, p17 }; |
---|
| 592 | |
---|
[819] | 593 | /* end of file */ |
---|