#include <G4HEKaonZeroInelastic.hh>
Inheritance diagram for G4HEKaonZeroInelastic:
Public Member Functions | |
| G4HEKaonZeroInelastic () | |
| ~G4HEKaonZeroInelastic () | |
| virtual void | ModelDescription (std::ostream &) const |
| G4HadFinalState * | ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus) |
| G4int | GetNumberOfSecondaries () |
| void | FirstIntInCasKaonZero (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 G4HEKaonZeroInelastic.hh.
| G4HEKaonZeroInelastic::G4HEKaonZeroInelastic | ( | ) | [inline] |
Definition at line 55 of file G4HEKaonZeroInelastic.hh.
References G4cout, G4endl, G4HEInelastic::MAXPART, G4HadronicInteraction::theMaxEnergy, G4HadronicInteraction::theMinEnergy, vecLength, and G4HEInelastic::verboseLevel.
00055 : G4HEInelastic("G4HEKaonZeroInelastic") 00056 { 00057 vecLength = 0; 00058 theMinEnergy = 20*CLHEP::GeV; 00059 theMaxEnergy = 10*CLHEP::TeV; 00060 MAXPART = 2048; 00061 verboseLevel = 0; 00062 G4cout << "WARNING: model G4HEKaonZeroInelastic is being deprecated and will\n" 00063 << "disappear in Geant4 version 10.0" << G4endl; 00064 }
| G4HEKaonZeroInelastic::~G4HEKaonZeroInelastic | ( | ) | [inline] |
| G4HadFinalState * G4HEKaonZeroInelastic::ApplyYourself | ( | const G4HadProjectile & | aTrack, | |
| G4Nucleus & | targetNucleus | |||
| ) | [virtual] |
Implements G4HadronicInteraction.
Definition at line 57 of file G4HEKaonZeroInelastic.cc.
References G4HEInelastic::ElasticScattering(), G4HEInelastic::FillParticleChange(), FirstIntInCasKaonZero(), 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.
00059 { 00060 G4HEVector* pv = new G4HEVector[MAXPART]; 00061 const G4HadProjectile* aParticle = &aTrack; 00062 const G4double A = targetNucleus.GetA_asInt(); 00063 const G4double Z = targetNucleus.GetZ_asInt(); 00064 G4HEVector incidentParticle(aParticle); 00065 00066 G4double atomicNumber = Z; 00067 G4double atomicWeight = A; 00068 00069 G4int incidentCode = incidentParticle.getCode(); 00070 G4double incidentMass = incidentParticle.getMass(); 00071 G4double incidentTotalEnergy = incidentParticle.getEnergy(); 00072 00073 // G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); 00074 // DHW 19 May 2011: variable set but not used 00075 00076 G4double incidentKineticEnergy = incidentTotalEnergy - incidentMass; 00077 00078 if (incidentKineticEnergy < 1.) 00079 G4cout << "GHEKaonZeroInelastic: incident energy < 1 GeV" << G4endl;; 00080 00081 if (verboseLevel > 1) { 00082 G4cout << "G4HEKaonZeroInelastic::ApplyYourself" << G4endl; 00083 G4cout << "incident particle " << incidentParticle.getName() 00084 << "mass " << incidentMass 00085 << "kinetic energy " << incidentKineticEnergy 00086 << G4endl; 00087 G4cout << "target material with (A,Z) = (" 00088 << atomicWeight << "," << atomicNumber << ")" << G4endl; 00089 } 00090 00091 G4double inelasticity = NuclearInelasticity(incidentKineticEnergy, 00092 atomicWeight, atomicNumber); 00093 if (verboseLevel > 1) 00094 G4cout << "nuclear inelasticity = " << inelasticity << G4endl; 00095 00096 incidentKineticEnergy -= inelasticity; 00097 00098 G4double excitationEnergyGNP = 0.; 00099 G4double excitationEnergyDTA = 0.; 00100 00101 G4double excitation = NuclearExcitation(incidentKineticEnergy, 00102 atomicWeight, atomicNumber, 00103 excitationEnergyGNP, 00104 excitationEnergyDTA); 00105 if (verboseLevel > 1) 00106 G4cout << "nuclear excitation = " << excitation << excitationEnergyGNP 00107 << excitationEnergyDTA << G4endl; 00108 00109 incidentKineticEnergy -= excitation; 00110 incidentTotalEnergy = incidentKineticEnergy + incidentMass; 00111 // incidentTotalMomentum = std::sqrt( (incidentTotalEnergy-incidentMass) 00112 // *(incidentTotalEnergy+incidentMass)); 00113 // DHW 19 May 2011: variable set but not used 00114 00115 G4HEVector targetParticle; 00116 if (G4UniformRand() < atomicNumber/atomicWeight) { 00117 targetParticle.setDefinition("Proton"); 00118 } else { 00119 targetParticle.setDefinition("Neutron"); 00120 } 00121 00122 G4double targetMass = targetParticle.getMass(); 00123 G4double centerOfMassEnergy = std::sqrt(incidentMass*incidentMass 00124 + targetMass*targetMass 00125 + 2.0*targetMass*incidentTotalEnergy); 00126 G4double availableEnergy = centerOfMassEnergy - targetMass - incidentMass; 00127 00128 G4bool inElastic = true; 00129 vecLength = 0; 00130 00131 if (verboseLevel > 1) 00132 G4cout << "ApplyYourself: CallFirstIntInCascade for particle " 00133 << incidentCode << G4endl; 00134 00135 G4bool successful = false; 00136 00137 FirstIntInCasKaonZero(inElastic, availableEnergy, pv, vecLength, 00138 incidentParticle, targetParticle, atomicWeight); 00139 00140 if (verboseLevel > 1) 00141 G4cout << "ApplyYourself::StrangeParticlePairProduction" << G4endl; 00142 00143 if ((vecLength > 0) && (availableEnergy > 1.)) 00144 StrangeParticlePairProduction(availableEnergy, centerOfMassEnergy, 00145 pv, vecLength, 00146 incidentParticle, targetParticle); 00147 00148 HighEnergyCascading(successful, pv, vecLength, 00149 excitationEnergyGNP, excitationEnergyDTA, 00150 incidentParticle, targetParticle, 00151 atomicWeight, atomicNumber); 00152 if (!successful) 00153 HighEnergyClusterProduction(successful, pv, vecLength, 00154 excitationEnergyGNP, excitationEnergyDTA, 00155 incidentParticle, targetParticle, 00156 atomicWeight, atomicNumber); 00157 if (!successful) 00158 MediumEnergyCascading(successful, pv, vecLength, 00159 excitationEnergyGNP, excitationEnergyDTA, 00160 incidentParticle, targetParticle, 00161 atomicWeight, atomicNumber); 00162 00163 if (!successful) 00164 MediumEnergyClusterProduction(successful, pv, vecLength, 00165 excitationEnergyGNP, excitationEnergyDTA, 00166 incidentParticle, targetParticle, 00167 atomicWeight, atomicNumber); 00168 if (!successful) 00169 QuasiElasticScattering(successful, pv, vecLength, 00170 excitationEnergyGNP, excitationEnergyDTA, 00171 incidentParticle, targetParticle, 00172 atomicWeight, atomicNumber); 00173 if (!successful) 00174 ElasticScattering(successful, pv, vecLength, 00175 incidentParticle, 00176 atomicWeight, atomicNumber); 00177 00178 if (!successful) 00179 G4cout << "GHEInelasticInteraction::ApplyYourself fails to produce final state particles" 00180 << G4endl; 00181 00182 FillParticleChange(pv, vecLength); 00183 00184 delete [] pv; 00185 theParticleChange.SetStatusChange(stopAndKill); 00186 return &theParticleChange; 00187 }
| void G4HEKaonZeroInelastic::FirstIntInCasKaonZero | ( | G4bool & | inElastic, | |
| const G4double | availableEnergy, | |||
| G4HEVector | pv[], | |||
| G4int & | vecLen, | |||
| const G4HEVector & | incidentParticle, | |||
| const G4HEVector & | targetParticle, | |||
| const G4double | atomicWeight | |||
| ) |
Definition at line 191 of file G4HEKaonZeroInelastic.cc.
References G4cout, G4endl, G4UniformRand, G4HEVector::getCode(), G4HEVector::getMass(), G4HEVector::getName(), G4HEVector::getTotalMomentum(), G4HEInelastic::KaonPlus, CLHEP::detail::n, G4HEInelastic::Neutron, neutronCode, G4INCL::Math::pi, G4HEInelastic::PionMinus, G4HEInelastic::PionPlus, G4HEInelastic::PionZero, G4HEInelastic::pmltpc(), G4HEInelastic::Proton, sqr(), and G4HEInelastic::verboseLevel.
Referenced by ApplyYourself().
00206 { 00207 static const G4double expxu = 82.; // upper bound for arg. of exp 00208 static const G4double expxl = -expxu; // lower bound for arg. of exp 00209 00210 static const G4double protb = 0.7; 00211 static const G4double neutb = 0.7; 00212 static const G4double c = 1.25; 00213 00214 static const G4int numMul = 1200; 00215 static const G4int numSec = 60; 00216 00217 G4int neutronCode = Neutron.getCode(); 00218 G4int protonCode = Proton.getCode(); 00219 00220 G4int targetCode = targetParticle.getCode(); 00221 G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); 00222 00223 static G4bool first = true; 00224 static G4double protmul[numMul], protnorm[numSec]; // proton constants 00225 static G4double neutmul[numMul], neutnorm[numSec]; // neutron constants 00226 00227 // misc. local variables 00228 // npos = number of pi+, nneg = number of pi-, nzero = number of pi0 00229 00230 G4int i, counter, nt, npos, nneg, nzero; 00231 00232 if( first ) 00233 { // compute normalization constants, this will only be done once 00234 first = false; 00235 for( i=0; i<numMul; i++ )protmul[i] = 0.0; 00236 for( i=0; i<numSec; i++ )protnorm[i] = 0.0; 00237 counter = -1; 00238 for( npos=0; npos<(numSec/3); npos++ ) 00239 { 00240 for( nneg=std::max(0,npos-1); nneg<=(npos+1); nneg++ ) 00241 { 00242 for( nzero=0; nzero<numSec/3; nzero++ ) 00243 { 00244 if( ++counter < numMul ) 00245 { 00246 nt = npos+nneg+nzero; 00247 if( (nt>0) && (nt<=numSec) ) 00248 { 00249 protmul[counter] = 00250 pmltpc(npos,nneg,nzero,nt,protb,c) ; 00251 protnorm[nt-1] += protmul[counter]; 00252 } 00253 } 00254 } 00255 } 00256 } 00257 for( i=0; i<numMul; i++ )neutmul[i] = 0.0; 00258 for( i=0; i<numSec; i++ )neutnorm[i] = 0.0; 00259 counter = -1; 00260 for( npos=0; npos<numSec/3; npos++ ) 00261 { 00262 for( nneg=npos; nneg<=(npos+2); nneg++ ) 00263 { 00264 for( nzero=0; nzero<numSec/3; nzero++ ) 00265 { 00266 if( ++counter < numMul ) 00267 { 00268 nt = npos+nneg+nzero; 00269 if( (nt>0) && (nt<=numSec) ) 00270 { 00271 neutmul[counter] = 00272 pmltpc(npos,nneg,nzero,nt,neutb,c); 00273 neutnorm[nt-1] += neutmul[counter]; 00274 } 00275 } 00276 } 00277 } 00278 } 00279 for( i=0; i<numSec; i++ ) 00280 { 00281 if( protnorm[i] > 0.0 )protnorm[i] = 1.0/protnorm[i]; 00282 if( neutnorm[i] > 0.0 )neutnorm[i] = 1.0/neutnorm[i]; 00283 } 00284 } // end of initialization 00285 00286 00287 // initialize the first two places 00288 // the same as beam and target 00289 pv[0] = incidentParticle; 00290 pv[1] = targetParticle; 00291 vecLen = 2; 00292 00293 if( !inElastic ) 00294 { // quasi-elastic scattering, no pions produced 00295 if( targetCode == protonCode ) 00296 { 00297 G4double cech[] = {0.33,0.27,0.29,0.31,0.27,0.18,0.13,0.10,0.09,0.07}; 00298 G4int iplab = G4int( std::min( 9.0, incidentTotalMomentum*5. ) ); 00299 if( G4UniformRand() < cech[iplab]/std::pow(atomicWeight,0.42) ) 00300 { // charge exchange K+ n -> K0 p 00301 pv[0] = KaonPlus; 00302 pv[1] = Neutron; 00303 } 00304 } 00305 return; 00306 } 00307 else if (availableEnergy <= PionPlus.getMass()) 00308 return; 00309 00310 // inelastic scattering 00311 00312 npos = 0, nneg = 0, nzero = 0; 00313 G4double eab = availableEnergy; 00314 G4int ieab = G4int( eab*5.0 ); 00315 00316 G4double supp[] = {0., 0.4, 0.55, 0.65, 0.75, 0.82, 0.86, 0.90, 0.94, 0.98}; 00317 if( (ieab <= 9) && (G4UniformRand() >= supp[ieab]) ) 00318 { 00319 // suppress high multiplicity events at low momentum 00320 // only one additional pion will be produced 00321 G4double w0, wp, wm, wt, ran; 00322 if( targetCode == neutronCode ) // target is a neutron 00323 { 00324 w0 = - sqr(1.+protb)/(2.*c*c); 00325 w0 = std::exp(w0); 00326 wm = - sqr(-1.+protb)/(2.*c*c); 00327 wm = std::exp(wm); 00328 w0 = w0/2.; 00329 wm = wm*1.5; 00330 if( G4UniformRand() < w0/(w0+wm) ) { npos = 0; nneg = 0; nzero = 1; } 00331 else 00332 { npos = 0; nneg = 1; nzero = 0; } 00333 } 00334 else 00335 { // target is a proton 00336 w0 = -sqr(1.+neutb)/(2.*c*c); 00337 wp = w0 = std::exp(w0); 00338 wm = -sqr(-1.+neutb)/(2.*c*c); 00339 wm = std::exp(wm); 00340 wt = w0+wp+wm; 00341 wp = w0+wp; 00342 ran = G4UniformRand(); 00343 if( ran < w0/wt) 00344 { npos = 0; nneg = 0; nzero = 1; } 00345 else if( ran < wp/wt) 00346 { npos = 1; nneg = 0; nzero = 0; } 00347 else 00348 { npos = 0; nneg = 1; nzero = 0; } 00349 } 00350 } 00351 else 00352 { 00353 // number of total particles vs. centre of mass Energy - 2*proton mass 00354 00355 G4double aleab = std::log(availableEnergy); 00356 G4double n = 3.62567+aleab*(0.665843+aleab*(0.336514 00357 + aleab*(0.117712+0.0136912*aleab))) - 2.0; 00358 00359 // normalization constant for kno-distribution. 00360 // calculate first the sum of all constants, check for numerical problems. 00361 G4double test, dum, anpn = 0.0; 00362 00363 for (nt=1; nt<=numSec; nt++) { 00364 test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); 00365 dum = pi*nt/(2.0*n*n); 00366 if (std::fabs(dum) < 1.0) { 00367 if( test >= 1.0e-10 )anpn += dum*test; 00368 } else { 00369 anpn += dum*test; 00370 } 00371 } 00372 00373 G4double ran = G4UniformRand(); 00374 G4double excs = 0.0; 00375 if( targetCode == protonCode ) 00376 { 00377 counter = -1; 00378 for( npos=0; npos<numSec/3; npos++ ) 00379 { 00380 for( nneg=std::max(0,npos-1); nneg<=(npos+1); nneg++ ) 00381 { 00382 for (nzero=0; nzero<numSec/3; nzero++) { 00383 if (++counter < numMul) { 00384 nt = npos+nneg+nzero; 00385 if ( (nt>0) && (nt<=numSec) ) { 00386 test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); 00387 dum = (pi/anpn)*nt*protmul[counter]*protnorm[nt-1]/(2.0*n*n); 00388 if (std::fabs(dum) < 1.0) { 00389 if( test >= 1.0e-10 )excs += dum*test; 00390 } else { 00391 excs += dum*test; 00392 } 00393 if (ran < excs) goto outOfLoop; //-----------------------> 00394 } 00395 } 00396 } 00397 } 00398 } 00399 00400 // 3 previous loops continued to the end 00401 inElastic = false; // quasi-elastic scattering 00402 return; 00403 } 00404 else 00405 { // target must be a neutron 00406 counter = -1; 00407 for( npos=0; npos<numSec/3; npos++ ) 00408 { 00409 for( nneg=npos; nneg<=(npos+2); nneg++ ) 00410 { 00411 for (nzero=0; nzero<numSec/3; nzero++) { 00412 if (++counter < numMul) { 00413 nt = npos+nneg+nzero; 00414 if ( (nt>=1) && (nt<=numSec) ) { 00415 test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); 00416 dum = (pi/anpn)*nt*neutmul[counter]*neutnorm[nt-1]/(2.0*n*n); 00417 if (std::fabs(dum) < 1.0) { 00418 if( test >= 1.0e-10 )excs += dum*test; 00419 } else { 00420 excs += dum*test; 00421 } 00422 if (ran < excs) goto outOfLoop; // --------------------------> 00423 } 00424 } 00425 } 00426 } 00427 } 00428 // 3 previous loops continued to the end 00429 inElastic = false; // quasi-elastic scattering. 00430 return; 00431 } 00432 } 00433 outOfLoop: // <----------------------------------------------- 00434 00435 if( targetCode == neutronCode) 00436 { 00437 if( npos == nneg) 00438 { 00439 } 00440 else if (npos == (nneg-1)) 00441 { 00442 if( G4UniformRand() < 0.5) 00443 { 00444 pv[0] = KaonPlus; 00445 } 00446 else 00447 { 00448 pv[1] = Proton; 00449 } 00450 } 00451 else 00452 { 00453 pv[0] = KaonPlus; 00454 pv[1] = Proton; 00455 } 00456 } 00457 else 00458 { 00459 if( npos == nneg ) 00460 { 00461 if( G4UniformRand() < 0.25) 00462 { 00463 pv[0] = KaonPlus; 00464 pv[1] = Neutron; 00465 } 00466 else 00467 { 00468 } 00469 } 00470 else if ( npos == (nneg+1)) 00471 { 00472 pv[1] = Neutron; 00473 } 00474 else 00475 { 00476 pv[0] = KaonPlus; 00477 } 00478 } 00479 00480 00481 nt = npos + nneg + nzero; 00482 while ( nt > 0) 00483 { 00484 G4double ran = G4UniformRand(); 00485 if ( ran < (G4double)npos/nt) 00486 { 00487 if( npos > 0 ) 00488 { pv[vecLen++] = PionPlus; 00489 npos--; 00490 } 00491 } 00492 else if ( ran < (G4double)(npos+nneg)/nt) 00493 { 00494 if( nneg > 0 ) 00495 { 00496 pv[vecLen++] = PionMinus; 00497 nneg--; 00498 } 00499 } 00500 else 00501 { 00502 if( nzero > 0 ) 00503 { 00504 pv[vecLen++] = PionZero; 00505 nzero--; 00506 } 00507 } 00508 nt = npos + nneg + nzero; 00509 } 00510 if (verboseLevel > 1) 00511 { 00512 G4cout << "Particles produced: " ; 00513 G4cout << pv[0].getName() << " " ; 00514 G4cout << pv[1].getName() << " " ; 00515 for (i=2; i < vecLen; i++) 00516 { 00517 G4cout << pv[i].getName() << " " ; 00518 } 00519 G4cout << G4endl; 00520 } 00521 return; }
| G4int G4HEKaonZeroInelastic::GetNumberOfSecondaries | ( | ) | [inline] |
Definition at line 75 of file G4HEKaonZeroInelastic.hh.
References vecLength.
00075 {return vecLength;}
| void G4HEKaonZeroInelastic::ModelDescription | ( | std::ostream & | ) | const [virtual] |
Reimplemented from G4HadronicInteraction.
Definition at line 42 of file G4HEKaonZeroInelastic.cc.
00043 { 00044 outFile << "G4HEKaonZeroInelastic is one of the High Energy\n" 00045 << "Parameterized (HEP) models used to implement inelastic\n" 00046 << "K0 scattering from nuclei. It is a re-engineered\n" 00047 << "version of the GHEISHA code of H. Fesefeldt. It divides the\n" 00048 << "initial collision products into backward- and forward-going\n" 00049 << "clusters which are then decayed into final state hadrons.\n" 00050 << "The model does not conserve energy on an event-by-event\n" 00051 << "basis. It may be applied to K0 with initial energies\n" 00052 << "above 20 GeV.\n"; 00053 }
Definition at line 70 of file G4HEKaonZeroInelastic.hh.
Referenced by ApplyYourself(), G4HEKaonZeroInelastic(), and GetNumberOfSecondaries().
1.4.7