#include <G4HEXiMinusInelastic.hh>
Inheritance diagram for G4HEXiMinusInelastic:
Public Member Functions | |
G4HEXiMinusInelastic () | |
~G4HEXiMinusInelastic () | |
virtual void | ModelDescription (std::ostream &) const |
G4HadFinalState * | ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus) |
G4int | GetNumberOfSecondaries () |
void | FirstIntInCasXiMinus (G4bool &inElastic, const G4double availableEnergy, G4HEVector pv[], G4int &vecLen, const G4HEVector &incidentParticle, const G4HEVector &targetParticle, const G4double atomicWeight) |
Data Fields | |
G4int | vecLength |
Definition at line 52 of file G4HEXiMinusInelastic.hh.
G4HEXiMinusInelastic::G4HEXiMinusInelastic | ( | ) | [inline] |
Definition at line 55 of file G4HEXiMinusInelastic.hh.
References G4cout, G4endl, G4HEInelastic::MAXPART, G4HadronicInteraction::theMaxEnergy, G4HadronicInteraction::theMinEnergy, vecLength, and G4HEInelastic::verboseLevel.
00055 : G4HEInelastic("G4HEXiMinusInelastic") 00056 { 00057 vecLength = 0; 00058 theMinEnergy = 20*CLHEP::GeV; 00059 theMaxEnergy = 10*CLHEP::TeV; 00060 MAXPART = 2048; 00061 verboseLevel = 0; 00062 G4cout << "WARNING: model G4HEXiMinusInelastic is being deprecated and will\n" 00063 << "disappear in Geant4 version 10.0" << G4endl; 00064 }
G4HEXiMinusInelastic::~G4HEXiMinusInelastic | ( | ) | [inline] |
G4HadFinalState * G4HEXiMinusInelastic::ApplyYourself | ( | const G4HadProjectile & | aTrack, | |
G4Nucleus & | targetNucleus | |||
) | [virtual] |
Implements G4HadronicInteraction.
Definition at line 56 of file G4HEXiMinusInelastic.cc.
References G4HEInelastic::ElasticScattering(), G4HEInelastic::FillParticleChange(), FirstIntInCasXiMinus(), G4cout, G4endl, G4UniformRand, G4Nucleus::GetA_asInt(), G4HEVector::getCode(), G4HEVector::getEnergy(), G4HEVector::getMass(), G4HEVector::getName(), G4Nucleus::GetZ_asInt(), G4HEInelastic::HighEnergyCascading(), G4HEInelastic::HighEnergyClusterProduction(), G4HEInelastic::MAXPART, G4HEInelastic::MediumEnergyCascading(), G4HEInelastic::MediumEnergyClusterProduction(), G4HEInelastic::NuclearExcitation(), G4HEInelastic::NuclearInelasticity(), G4HEInelastic::QuasiElasticScattering(), G4HEVector::setDefinition(), G4HadFinalState::SetStatusChange(), stopAndKill, G4HEInelastic::StrangeParticlePairProduction(), G4HadronicInteraction::theParticleChange, vecLength, and G4HEInelastic::verboseLevel.
00058 { 00059 G4HEVector* pv = new G4HEVector[MAXPART]; 00060 const G4HadProjectile* aParticle = &aTrack; 00061 const G4double A = targetNucleus.GetA_asInt(); 00062 const G4double Z = targetNucleus.GetZ_asInt(); 00063 G4HEVector incidentParticle(aParticle); 00064 00065 G4double atomicNumber = Z; 00066 G4double atomicWeight = A; 00067 00068 G4int incidentCode = incidentParticle.getCode(); 00069 G4double incidentMass = incidentParticle.getMass(); 00070 G4double incidentTotalEnergy = incidentParticle.getEnergy(); 00071 00072 // G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); 00073 // DHW 19 May 2011: variable set but not used 00074 00075 G4double incidentKineticEnergy = incidentTotalEnergy - incidentMass; 00076 00077 if (incidentKineticEnergy < 1.) 00078 G4cout << "GHEXiMinusInelastic: incident energy < 1 GeV" << G4endl; 00079 00080 if (verboseLevel > 1) { 00081 G4cout << "G4HEXiMinusInelastic::ApplyYourself" << G4endl; 00082 G4cout << "incident particle " << incidentParticle.getName() 00083 << "mass " << incidentMass 00084 << "kinetic energy " << incidentKineticEnergy 00085 << G4endl; 00086 G4cout << "target material with (A,Z) = (" 00087 << atomicWeight << "," << atomicNumber << ")" << G4endl; 00088 } 00089 00090 G4double inelasticity = NuclearInelasticity(incidentKineticEnergy, 00091 atomicWeight, atomicNumber); 00092 if (verboseLevel > 1) 00093 G4cout << "nuclear inelasticity = " << inelasticity << G4endl; 00094 00095 incidentKineticEnergy -= inelasticity; 00096 00097 G4double excitationEnergyGNP = 0.; 00098 G4double excitationEnergyDTA = 0.; 00099 00100 G4double excitation = NuclearExcitation(incidentKineticEnergy, 00101 atomicWeight, atomicNumber, 00102 excitationEnergyGNP, 00103 excitationEnergyDTA); 00104 if (verboseLevel > 1) 00105 G4cout << "nuclear excitation = " << excitation << excitationEnergyGNP 00106 << excitationEnergyDTA << G4endl; 00107 00108 incidentKineticEnergy -= excitation; 00109 incidentTotalEnergy = incidentKineticEnergy + incidentMass; 00110 // incidentTotalMomentum = std::sqrt( (incidentTotalEnergy-incidentMass) 00111 // *(incidentTotalEnergy+incidentMass)); 00112 // DHW 19 May 2011: variable set but not used 00113 00114 G4HEVector targetParticle; 00115 if (G4UniformRand() < atomicNumber/atomicWeight) { 00116 targetParticle.setDefinition("Proton"); 00117 } else { 00118 targetParticle.setDefinition("Neutron"); 00119 } 00120 00121 G4double targetMass = targetParticle.getMass(); 00122 G4double centerOfMassEnergy = std::sqrt(incidentMass*incidentMass 00123 + targetMass*targetMass 00124 + 2.0*targetMass*incidentTotalEnergy); 00125 G4double availableEnergy = centerOfMassEnergy - targetMass - incidentMass; 00126 00127 G4bool inElastic = true; 00128 vecLength = 0; 00129 00130 if (verboseLevel > 1) 00131 G4cout << "ApplyYourself: CallFirstIntInCascade for particle " 00132 << incidentCode << G4endl; 00133 00134 G4bool successful = false; 00135 00136 FirstIntInCasXiMinus(inElastic, availableEnergy, pv, vecLength, 00137 incidentParticle, targetParticle, atomicWeight); 00138 00139 if (verboseLevel > 1) 00140 G4cout << "ApplyYourself::StrangeParticlePairProduction" << G4endl; 00141 00142 if ((vecLength > 0) && (availableEnergy > 1.)) 00143 StrangeParticlePairProduction(availableEnergy, centerOfMassEnergy, 00144 pv, vecLength, 00145 incidentParticle, targetParticle); 00146 00147 HighEnergyCascading(successful, pv, vecLength, 00148 excitationEnergyGNP, excitationEnergyDTA, 00149 incidentParticle, targetParticle, 00150 atomicWeight, atomicNumber); 00151 if (!successful) 00152 HighEnergyClusterProduction(successful, pv, vecLength, 00153 excitationEnergyGNP, excitationEnergyDTA, 00154 incidentParticle, targetParticle, 00155 atomicWeight, atomicNumber); 00156 if (!successful) 00157 MediumEnergyCascading(successful, pv, vecLength, 00158 excitationEnergyGNP, excitationEnergyDTA, 00159 incidentParticle, targetParticle, 00160 atomicWeight, atomicNumber); 00161 00162 if (!successful) 00163 MediumEnergyClusterProduction(successful, pv, vecLength, 00164 excitationEnergyGNP, excitationEnergyDTA, 00165 incidentParticle, targetParticle, 00166 atomicWeight, atomicNumber); 00167 if (!successful) 00168 QuasiElasticScattering(successful, pv, vecLength, 00169 excitationEnergyGNP, excitationEnergyDTA, 00170 incidentParticle, targetParticle, 00171 atomicWeight, atomicNumber); 00172 if (!successful) 00173 ElasticScattering(successful, pv, vecLength, 00174 incidentParticle, 00175 atomicWeight, atomicNumber); 00176 00177 if (!successful) 00178 G4cout << "GHEInelasticInteraction::ApplyYourself fails to produce final state particles" 00179 << G4endl; 00180 00181 FillParticleChange(pv, vecLength); 00182 delete [] pv; 00183 theParticleChange.SetStatusChange(stopAndKill); 00184 return &theParticleChange; 00185 }
void G4HEXiMinusInelastic::FirstIntInCasXiMinus | ( | G4bool & | inElastic, | |
const G4double | availableEnergy, | |||
G4HEVector | pv[], | |||
G4int & | vecLen, | |||
const G4HEVector & | incidentParticle, | |||
const G4HEVector & | targetParticle, | |||
const G4double | atomicWeight | |||
) |
Definition at line 189 of file G4HEXiMinusInelastic.cc.
References G4cout, G4endl, G4UniformRand, G4HEVector::getCode(), G4HEVector::getMass(), G4HEVector::getName(), G4HEVector::getTotalMomentum(), G4HEInelastic::Lambda, CLHEP::detail::n, G4HEInelastic::Neutron, neutronCode, G4INCL::Math::pi, G4HEInelastic::PionMinus, G4HEInelastic::PionPlus, G4HEInelastic::PionZero, G4HEInelastic::pmltpc(), G4HEInelastic::Proton, G4HEInelastic::SigmaMinus, G4HEInelastic::SigmaZero, G4HEInelastic::verboseLevel, G4HEInelastic::XiMinus, and G4HEInelastic::XiZero.
Referenced by ApplyYourself().
00204 { 00205 static const G4double expxu = 82.; // upper bound for arg. of exp 00206 static const G4double expxl = -expxu; // lower bound for arg. of exp 00207 00208 static const G4double protb = 0.7; 00209 static const G4double neutb = 0.7; 00210 static const G4double c = 1.25; 00211 00212 static const G4int numMul = 1200; 00213 static const G4int numSec = 60; 00214 00215 G4int neutronCode = Neutron.getCode(); 00216 G4int protonCode = Proton.getCode(); 00217 00218 G4int targetCode = targetParticle.getCode(); 00219 G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); 00220 00221 static G4bool first = true; 00222 static G4double protmul[numMul], protnorm[numSec]; // proton constants 00223 static G4double neutmul[numMul], neutnorm[numSec]; // neutron constants 00224 00225 // misc. local variables 00226 // npos = number of pi+, nneg = number of pi-, nzero = number of pi0 00227 00228 G4int i, counter, nt, npos, nneg, nzero; 00229 00230 if (first) { 00231 // compute normalization constants, this will only be done once 00232 first = false; 00233 for (i = 0; i < numMul; i++) protmul[i] = 0.0; 00234 for (i = 0; i < numSec; i++) protnorm[i] = 0.0; 00235 counter = -1; 00236 for( npos=0; npos<(numSec/3); npos++ ) 00237 { 00238 for( nneg=std::max(0,npos-1); nneg<=(npos+1); nneg++ ) 00239 { 00240 for( nzero=0; nzero<numSec/3; nzero++ ) 00241 { 00242 if( ++counter < numMul ) 00243 { 00244 nt = npos+nneg+nzero; 00245 if( (nt>0) && (nt<=numSec) ) 00246 { 00247 protmul[counter] = pmltpc(npos,nneg,nzero,nt,protb,c); 00248 protnorm[nt-1] += protmul[counter]; 00249 } 00250 } 00251 } 00252 } 00253 } 00254 for( i=0; i<numMul; i++ )neutmul[i] = 0.0; 00255 for( i=0; i<numSec; i++ )neutnorm[i] = 0.0; 00256 counter = -1; 00257 for( npos=0; npos<numSec/3; npos++ ) 00258 { 00259 for( nneg=npos; nneg<=(npos+2); nneg++ ) 00260 { 00261 for( nzero=0; nzero<numSec/3; nzero++ ) 00262 { 00263 if( ++counter < numMul ) 00264 { 00265 nt = npos+nneg+nzero; 00266 if( (nt>0) && (nt<=numSec) ) 00267 { 00268 neutmul[counter] = pmltpc(npos,nneg,nzero,nt,neutb,c); 00269 neutnorm[nt-1] += neutmul[counter]; 00270 } 00271 } 00272 } 00273 } 00274 } 00275 for( i=0; i<numSec; i++ ) 00276 { 00277 if( protnorm[i] > 0.0 )protnorm[i] = 1.0/protnorm[i]; 00278 if( neutnorm[i] > 0.0 )neutnorm[i] = 1.0/neutnorm[i]; 00279 } 00280 } // end of initialization 00281 00282 00283 // initialize the first two places 00284 // the same as beam and target 00285 pv[0] = incidentParticle; 00286 pv[1] = targetParticle; 00287 vecLen = 2; 00288 00289 if( !inElastic ) 00290 { // quasi-elastic scattering, no pions produced 00291 G4double cech[] = {0.50, 0.45, 0.40, 0.35, 0.30, 0.25, 0.06, 0.04, 0.005, 0.}; 00292 G4int iplab = G4int( std::min( 9.0, incidentTotalMomentum*2.5 ) ); 00293 if( G4UniformRand() < cech[iplab]/std::pow(atomicWeight,0.42) ) 00294 { 00295 G4double ran = G4UniformRand(); 00296 if( targetCode == neutronCode) 00297 { 00298 if (ran < 0.2) 00299 { 00300 pv[0] = SigmaMinus; 00301 pv[1] = SigmaZero; 00302 } 00303 else if (ran < 0.4) 00304 { 00305 pv[0] = SigmaZero; 00306 pv[1] = SigmaMinus; 00307 } 00308 else if (ran < 0.6) 00309 { 00310 pv[0] = SigmaMinus; 00311 pv[1] = Lambda; 00312 } 00313 else if (ran < 0.8) 00314 { 00315 pv[0] = Lambda; 00316 pv[1] = SigmaMinus; 00317 } 00318 else 00319 { 00320 pv[0] = Neutron; 00321 pv[1] = XiMinus; 00322 } 00323 } 00324 else 00325 { 00326 if (ran < 0.2) 00327 { 00328 pv[0] = SigmaZero; 00329 pv[1] = SigmaZero; 00330 } 00331 else if (ran < 0.3) 00332 { 00333 pv[0] = Lambda; 00334 pv[1] = Lambda; 00335 } 00336 else if (ran < 0.4) 00337 { 00338 pv[0] = SigmaZero; 00339 pv[1] = Lambda; 00340 } 00341 else if (ran < 0.5) 00342 { 00343 pv[0] = Lambda; 00344 pv[1] = SigmaZero; 00345 } 00346 else if (ran < 0.7) 00347 { 00348 pv[0] = SigmaZero; 00349 pv[1] = Neutron; 00350 } 00351 else if (ran < 0.8) 00352 { 00353 pv[0] = Neutron; 00354 pv[1] = SigmaZero; 00355 } 00356 else 00357 { 00358 pv[0] = Proton; 00359 pv[1] = XiMinus; 00360 } 00361 } 00362 } 00363 return; 00364 } 00365 else if (availableEnergy <= PionPlus.getMass()) 00366 return; 00367 00368 // inelastic scattering 00369 00370 npos = 0; nneg = 0; nzero = 0; 00371 00372 // number of total particles vs. centre of mass Energy - 2*proton mass 00373 00374 G4double aleab = std::log(availableEnergy); 00375 G4double n = 3.62567+aleab*(0.665843+aleab*(0.336514 00376 + aleab*(0.117712+0.0136912*aleab))) - 2.0; 00377 00378 // normalization constant for kno-distribution. 00379 // calculate first the sum of all constants, check for numerical problems. 00380 G4double test, dum, anpn = 0.0; 00381 00382 for (nt=1; nt<=numSec; nt++) { 00383 test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); 00384 dum = pi*nt/(2.0*n*n); 00385 if (std::fabs(dum) < 1.0) { 00386 if (test >= 1.0e-10) anpn += dum*test; 00387 } else { 00388 anpn += dum*test; 00389 } 00390 } 00391 00392 G4double ran = G4UniformRand(); 00393 G4double excs = 0.0; 00394 if( targetCode == protonCode ) 00395 { 00396 counter = -1; 00397 for (npos=0; npos<numSec/3; npos++) { 00398 for (nneg=std::max(0,npos-1); nneg<=(npos+1); nneg++) { 00399 for (nzero=0; nzero<numSec/3; nzero++) { 00400 if (++counter < numMul) { 00401 nt = npos+nneg+nzero; 00402 if ( (nt>0) && (nt<=numSec) ) { 00403 test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); 00404 dum = (pi/anpn)*nt*protmul[counter]*protnorm[nt-1]/(2.0*n*n); 00405 if (std::fabs(dum) < 1.0) { 00406 if (test >= 1.0e-10) excs += dum*test; 00407 } else { 00408 excs += dum*test; 00409 } 00410 if (ran < excs) goto outOfLoop; //-----------------------> 00411 } 00412 } 00413 } 00414 } 00415 } 00416 00417 // 3 previous loops continued to the end 00418 inElastic = false; // quasi-elastic scattering 00419 return; 00420 } 00421 else 00422 { // target must be a neutron 00423 counter = -1; 00424 for (npos=0; npos<numSec/3; npos++) { 00425 for (nneg=npos; nneg<=(npos+2); nneg++) { 00426 for( nzero=0; nzero<numSec/3; nzero++) { 00427 if (++counter < numMul) { 00428 nt = npos+nneg+nzero; 00429 if ( (nt>=1) && (nt<=numSec) ) { 00430 test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); 00431 dum = (pi/anpn)*nt*neutmul[counter]*neutnorm[nt-1]/(2.0*n*n); 00432 if (std::fabs(dum) < 1.0) { 00433 if( test >= 1.0e-10 )excs += dum*test; 00434 } else { 00435 excs += dum*test; 00436 } 00437 if (ran < excs) goto outOfLoop; // ---------------------> 00438 } 00439 } 00440 } 00441 } 00442 } 00443 // 3 previous loops continued to the end 00444 inElastic = false; // quasi-elastic scattering. 00445 return; 00446 } 00447 00448 outOfLoop: // <--------------------------------------------------- 00449 00450 // in the following we do not consider 00451 // strangeness transfer in high multiplicity 00452 // events. YK combinations are added in 00453 // StrangeParticlePairProduction 00454 ran = G4UniformRand(); 00455 if (targetCode == neutronCode) { 00456 if( npos == nneg) 00457 { 00458 } 00459 else if (npos == (nneg-1)) 00460 { 00461 if( ran < 0.50) 00462 { 00463 pv[0] = XiZero; 00464 } 00465 else 00466 { 00467 pv[1] = Proton; 00468 } 00469 } 00470 else 00471 { 00472 pv[0] = XiZero; 00473 pv[1] = Proton; 00474 } 00475 } else { 00476 if (npos == nneg) 00477 { 00478 if (ran < 0.5) 00479 { 00480 } 00481 else 00482 { 00483 pv[0] = XiZero; 00484 pv[1] = Neutron; 00485 } 00486 } 00487 else if (npos == (nneg+1)) 00488 { 00489 pv[1] = Neutron; 00490 } 00491 else 00492 { 00493 pv[0] = XiZero; 00494 } 00495 } 00496 00497 nt = npos + nneg + nzero; 00498 while (nt > 0) { 00499 G4double rnd = G4UniformRand(); 00500 if (rnd < (G4double)npos/nt) { 00501 if (npos > 0) { 00502 pv[vecLen++] = PionPlus; 00503 npos--; 00504 } 00505 } else if (rnd < (G4double)(npos+nneg)/nt) { 00506 if (nneg > 0) { 00507 pv[vecLen++] = PionMinus; 00508 nneg--; 00509 } 00510 } else { 00511 if (nzero > 0) { 00512 pv[vecLen++] = PionZero; 00513 nzero--; 00514 } 00515 } 00516 nt = npos + nneg + nzero; 00517 } 00518 00519 if (verboseLevel > 1) { 00520 G4cout << "Particles produced: " ; 00521 G4cout << pv[0].getName() << " " ; 00522 G4cout << pv[1].getName() << " " ; 00523 for (i = 2; i < vecLen; i++) G4cout << pv[i].getName() << " " ; 00524 G4cout << G4endl; 00525 } 00526 00527 return; 00528 }
G4int G4HEXiMinusInelastic::GetNumberOfSecondaries | ( | ) | [inline] |
Definition at line 75 of file G4HEXiMinusInelastic.hh.
References vecLength.
00075 {return vecLength;}
void G4HEXiMinusInelastic::ModelDescription | ( | std::ostream & | ) | const [virtual] |
Reimplemented from G4HadronicInteraction.
Definition at line 41 of file G4HEXiMinusInelastic.cc.
00042 { 00043 outFile << "G4HEXiMinusInelastic is one of the High Energy\n" 00044 << "Parameterized (HEP) models used to implement inelastic\n" 00045 << "Xi- scattering from nuclei. It is a re-engineered\n" 00046 << "version of the GHEISHA code of H. Fesefeldt. It divides the\n" 00047 << "initial collision products into backward- and forward-going\n" 00048 << "clusters which are then decayed into final state hadrons.\n" 00049 << "The model does not conserve energy on an event-by-event\n" 00050 << "basis. It may be applied to Xi- with initial energies\n" 00051 << "above 20 GeV.\n"; 00052 }
Definition at line 70 of file G4HEXiMinusInelastic.hh.
Referenced by ApplyYourself(), G4HEXiMinusInelastic(), and GetNumberOfSecondaries().