1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4LEAntiSigmaMinusInelastic.cc,v 1.11 2006/06/29 20:44:49 gunter Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-02 $ |
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29 | // |
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30 | // Hadronic Process: AntiSigmaMinus Inelastic Process |
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31 | // J.L. Chuma, TRIUMF, 19-Feb-1997 |
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32 | // Last modified: 27-Mar-1997 |
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33 | // J.P. Wellisch: 25.Apr-97: counter errors removed lines 426, 447 |
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34 | // Modified by J.L.Chuma 30-Apr-97: added originalTarget for CalculateMomenta |
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35 | |
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36 | #include "G4LEAntiSigmaMinusInelastic.hh" |
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37 | #include "Randomize.hh" |
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38 | |
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39 | G4HadFinalState * |
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40 | G4LEAntiSigmaMinusInelastic::ApplyYourself( const G4HadProjectile &aTrack, |
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41 | G4Nucleus &targetNucleus ) |
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42 | { |
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43 | const G4HadProjectile *originalIncident = &aTrack; |
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44 | if (originalIncident->GetKineticEnergy()<= 0.1*MeV) |
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45 | { |
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46 | theParticleChange.SetStatusChange(isAlive); |
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47 | theParticleChange.SetEnergyChange(aTrack.GetKineticEnergy()); |
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48 | theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit()); |
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49 | return &theParticleChange; |
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50 | } |
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51 | // |
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52 | // create the target particle |
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53 | // |
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54 | G4DynamicParticle *originalTarget = targetNucleus.ReturnTargetParticle(); |
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55 | |
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56 | if( verboseLevel > 1 ) |
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57 | { |
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58 | const G4Material *targetMaterial = aTrack.GetMaterial(); |
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59 | G4cout << "G4LEAntiSigmaMinusInelastic::ApplyYourself called" << G4endl; |
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60 | G4cout << "kinetic energy = " << originalIncident->GetKineticEnergy()/MeV << "MeV, "; |
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61 | G4cout << "target material = " << targetMaterial->GetName() << ", "; |
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62 | G4cout << "target particle = " << originalTarget->GetDefinition()->GetParticleName() |
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63 | << G4endl; |
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64 | } |
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65 | // |
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66 | // Fermi motion and evaporation |
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67 | // As of Geant3, the Fermi energy calculation had not been Done |
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68 | // |
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69 | G4double ek = originalIncident->GetKineticEnergy()/MeV; |
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70 | G4double amas = originalIncident->GetDefinition()->GetPDGMass()/MeV; |
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71 | G4ReactionProduct modifiedOriginal; |
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72 | modifiedOriginal = *originalIncident; |
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73 | |
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74 | G4double tkin = targetNucleus.Cinema( ek ); |
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75 | ek += tkin; |
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76 | modifiedOriginal.SetKineticEnergy( ek*MeV ); |
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77 | G4double et = ek + amas; |
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78 | G4double p = std::sqrt( std::abs((et-amas)*(et+amas)) ); |
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79 | G4double pp = modifiedOriginal.GetMomentum().mag()/MeV; |
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80 | if( pp > 0.0 ) |
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81 | { |
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82 | G4ThreeVector momentum = modifiedOriginal.GetMomentum(); |
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83 | modifiedOriginal.SetMomentum( momentum * (p/pp) ); |
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84 | } |
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85 | // |
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86 | // calculate black track energies |
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87 | // |
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88 | tkin = targetNucleus.EvaporationEffects( ek ); |
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89 | ek -= tkin; |
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90 | modifiedOriginal.SetKineticEnergy( ek*MeV ); |
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91 | et = ek + amas; |
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92 | p = std::sqrt( std::abs((et-amas)*(et+amas)) ); |
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93 | pp = modifiedOriginal.GetMomentum().mag()/MeV; |
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94 | if( pp > 0.0 ) |
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95 | { |
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96 | G4ThreeVector momentum = modifiedOriginal.GetMomentum(); |
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97 | modifiedOriginal.SetMomentum( momentum * (p/pp) ); |
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98 | } |
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99 | G4ReactionProduct currentParticle = modifiedOriginal; |
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100 | G4ReactionProduct targetParticle; |
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101 | targetParticle = *originalTarget; |
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102 | currentParticle.SetSide( 1 ); // incident always goes in forward hemisphere |
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103 | targetParticle.SetSide( -1 ); // target always goes in backward hemisphere |
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104 | G4bool incidentHasChanged = false; |
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105 | G4bool targetHasChanged = false; |
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106 | G4bool quasiElastic = false; |
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107 | G4FastVector<G4ReactionProduct,GHADLISTSIZE> vec; // vec will contain the secondary particles |
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108 | G4int vecLen = 0; |
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109 | vec.Initialize( 0 ); |
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110 | |
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111 | const G4double cutOff = 0.1; |
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112 | const G4double anni = std::min( 1.3*currentParticle.GetTotalMomentum()/GeV, 0.4 ); |
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113 | if( (currentParticle.GetKineticEnergy()/MeV > cutOff) || (G4UniformRand() > anni) ) |
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114 | Cascade( vec, vecLen, |
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115 | originalIncident, currentParticle, targetParticle, |
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116 | incidentHasChanged, targetHasChanged, quasiElastic ); |
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117 | |
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118 | CalculateMomenta( vec, vecLen, |
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119 | originalIncident, originalTarget, modifiedOriginal, |
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120 | targetNucleus, currentParticle, targetParticle, |
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121 | incidentHasChanged, targetHasChanged, quasiElastic ); |
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122 | |
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123 | SetUpChange( vec, vecLen, |
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124 | currentParticle, targetParticle, |
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125 | incidentHasChanged ); |
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126 | |
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127 | delete originalTarget; |
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128 | return &theParticleChange; |
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129 | } |
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130 | |
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131 | void |
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132 | G4LEAntiSigmaMinusInelastic::Cascade( |
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133 | G4FastVector<G4ReactionProduct,GHADLISTSIZE> &vec, |
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134 | G4int& vecLen, |
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135 | const G4HadProjectile *originalIncident, |
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136 | G4ReactionProduct ¤tParticle, |
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137 | G4ReactionProduct &targetParticle, |
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138 | G4bool &incidentHasChanged, |
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139 | G4bool &targetHasChanged, |
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140 | G4bool &quasiElastic ) |
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141 | { |
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142 | // derived from original FORTRAN code CASASM by H. Fesefeldt (13-Sep-1987) |
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143 | // |
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144 | // AntiSigmaMinus undergoes interaction with nucleon within a nucleus. Check if it is |
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145 | // energetically possible to produce pions/kaons. In not, assume nuclear excitation |
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146 | // occurs and input particle is degraded in energy. No other particles are produced. |
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147 | // If reaction is possible, find the correct number of pions/protons/neutrons |
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148 | // produced using an interpolation to multiplicity data. Replace some pions or |
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149 | // protons/neutrons by kaons or strange baryons according to the average |
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150 | // multiplicity per Inelastic reaction. |
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151 | // |
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152 | const G4double mOriginal = originalIncident->GetDefinition()->GetPDGMass()/MeV; |
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153 | const G4double etOriginal = originalIncident->GetTotalEnergy()/MeV; |
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154 | const G4double pOriginal = originalIncident->GetTotalMomentum()/MeV; |
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155 | const G4double targetMass = targetParticle.GetMass()/MeV; |
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156 | G4double centerofmassEnergy = std::sqrt( mOriginal*mOriginal + |
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157 | targetMass*targetMass + |
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158 | 2.0*targetMass*etOriginal ); |
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159 | G4double availableEnergy = centerofmassEnergy-(targetMass+mOriginal); |
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160 | |
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161 | static G4bool first = true; |
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162 | const G4int numMul = 1200; |
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163 | const G4int numMulA = 400; |
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164 | const G4int numSec = 60; |
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165 | static G4double protmul[numMul], protnorm[numSec]; // proton constants |
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166 | static G4double neutmul[numMul], neutnorm[numSec]; // neutron constants |
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167 | static G4double protmulA[numMulA], protnormA[numSec]; // proton constants |
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168 | static G4double neutmulA[numMulA], neutnormA[numSec]; // neutron constants |
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169 | // np = number of pi+, nm = number of pi-, nz = number of pi0 |
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170 | G4int counter, nt=0, np=0, nm=0, nz=0; |
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171 | G4double test; |
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172 | const G4double c = 1.25; |
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173 | const G4double b[2] = { 0.7, 0.7 }; |
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174 | if( first ) // compute normalization constants, this will only be Done once |
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175 | { |
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176 | first = false; |
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177 | G4int i; |
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178 | for( i=0; i<numMul; ++i )protmul[i] = 0.0; |
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179 | for( i=0; i<numSec; ++i )protnorm[i] = 0.0; |
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180 | counter = -1; |
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181 | for( np=0; np<(numSec/3); ++np ) |
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182 | { |
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183 | for( nm=std::max(0,np-2); nm<=np; ++nm ) |
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184 | { |
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185 | for( nz=0; nz<numSec/3; ++nz ) |
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186 | { |
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187 | if( ++counter < numMul ) |
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188 | { |
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189 | nt = np+nm+nz; |
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190 | if( nt>0 && nt<=numSec ) |
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191 | { |
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192 | protmul[counter] = Pmltpc(np,nm,nz,nt,b[0],c); |
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193 | protnorm[nt-1] += protmul[counter]; |
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194 | } |
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195 | } |
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196 | } |
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197 | } |
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198 | } |
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199 | for( i=0; i<numMul; ++i )neutmul[i] = 0.0; |
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200 | for( i=0; i<numSec; ++i )neutnorm[i] = 0.0; |
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201 | counter = -1; |
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202 | for( np=0; np<numSec/3; ++np ) |
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203 | { |
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204 | for( nm=std::max(0,np-1); nm<=(np+1); ++nm ) |
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205 | { |
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206 | for( nz=0; nz<numSec/3; ++nz ) |
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207 | { |
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208 | if( ++counter < numMul ) |
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209 | { |
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210 | nt = np+nm+nz; |
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211 | if( nt>0 && nt<=numSec ) |
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212 | { |
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213 | neutmul[counter] = Pmltpc(np,nm,nz,nt,b[1],c); |
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214 | neutnorm[nt-1] += neutmul[counter]; |
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215 | } |
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216 | } |
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217 | } |
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218 | } |
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219 | } |
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220 | for( i=0; i<numSec; ++i ) |
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221 | { |
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222 | if( protnorm[i] > 0.0 )protnorm[i] = 1.0/protnorm[i]; |
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223 | if( neutnorm[i] > 0.0 )neutnorm[i] = 1.0/neutnorm[i]; |
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224 | } |
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225 | // |
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226 | // do the same for annihilation channels |
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227 | // |
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228 | for( i=0; i<numMulA; ++i )protmulA[i] = 0.0; |
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229 | for( i=0; i<numSec; ++i )protnormA[i] = 0.0; |
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230 | counter = -1; |
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231 | for( np=2; np<(numSec/3); ++np ) |
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232 | { |
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233 | nm = np-2; |
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234 | for( nz=0; nz<numSec/3; ++nz ) |
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235 | { |
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236 | if( ++counter < numMulA ) |
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237 | { |
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238 | nt = np+nm+nz; |
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239 | if( nt>1 && nt<=numSec ) |
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240 | { |
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241 | protmulA[counter] = Pmltpc(np,nm,nz,nt,b[0],c); |
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242 | protnormA[nt-1] += protmulA[counter]; |
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243 | } |
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244 | } |
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245 | } |
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246 | } |
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247 | for( i=0; i<numMulA; ++i )neutmulA[i] = 0.0; |
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248 | for( i=0; i<numSec; ++i )neutnormA[i] = 0.0; |
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249 | counter = -1; |
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250 | for( np=1; np<numSec/3; ++np ) |
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251 | { |
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252 | nm = np-1; |
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253 | for( nz=0; nz<numSec/3; ++nz ) |
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254 | { |
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255 | if( ++counter < numMulA ) |
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256 | { |
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257 | nt = np+nm+nz; |
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258 | if( nt>1 && nt<=numSec ) |
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259 | { |
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260 | neutmulA[counter] = Pmltpc(np,nm,nz,nt,b[1],c); |
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261 | neutnormA[nt-1] += neutmulA[counter]; |
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262 | } |
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263 | } |
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264 | } |
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265 | } |
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266 | for( i=0; i<numSec; ++i ) |
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267 | { |
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268 | if( protnormA[i] > 0.0 )protnormA[i] = 1.0/protnormA[i]; |
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269 | if( neutnormA[i] > 0.0 )neutnormA[i] = 1.0/neutnormA[i]; |
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270 | } |
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271 | } // end of initialization |
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272 | const G4double expxu = 82.; // upper bound for arg. of exp |
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273 | const G4double expxl = -expxu; // lower bound for arg. of exp |
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274 | G4ParticleDefinition *aNeutron = G4Neutron::Neutron(); |
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275 | G4ParticleDefinition *aProton = G4Proton::Proton(); |
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276 | G4ParticleDefinition *aPiPlus = G4PionPlus::PionPlus(); |
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277 | G4ParticleDefinition *aKaonMinus = G4KaonMinus::KaonMinus(); |
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278 | G4ParticleDefinition *aKaonZL = G4KaonZeroLong::KaonZeroLong(); |
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279 | G4ParticleDefinition *aKaonPlus = G4KaonPlus::KaonPlus(); |
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280 | G4ParticleDefinition *anAntiLambda = G4AntiLambda::AntiLambda(); |
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281 | G4ParticleDefinition *anAntiSigmaZero = G4AntiSigmaZero::AntiSigmaZero(); |
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282 | const G4double anhl[] = {1.00,1.00,1.00,1.00,1.00,1.00,1.00,1.00,0.97,0.88, |
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283 | 0.85,0.81,0.75,0.64,0.64,0.55,0.55,0.45,0.47,0.40, |
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284 | 0.39,0.36,0.33,0.10,0.01}; |
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285 | G4int iplab = G4int( pOriginal/GeV*10.0 ); |
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286 | if( iplab > 9 )iplab = G4int( (pOriginal/GeV- 1.0)*5.0 ) + 10; |
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287 | if( iplab > 14 )iplab = G4int( pOriginal/GeV- 2.0 ) + 15; |
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288 | if( iplab > 23 )iplab = G4int( (pOriginal/GeV-10.0)/10.0 ) + 23; |
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289 | if( iplab > 24 )iplab = 24; |
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290 | if( G4UniformRand() > anhl[iplab] ) |
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291 | { |
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292 | if( availableEnergy <= aPiPlus->GetPDGMass()/MeV ) |
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293 | { |
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294 | quasiElastic = true; |
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295 | return; |
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296 | } |
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297 | G4double n, anpn; |
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298 | GetNormalizationConstant( availableEnergy, n, anpn ); |
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299 | G4double ran = G4UniformRand(); |
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300 | G4double dum, excs = 0.0; |
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301 | if( targetParticle.GetDefinition() == aProton ) |
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302 | { |
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303 | counter = -1; |
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304 | for( np=0; np<numSec/3 && ran>=excs; ++np ) |
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305 | { |
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306 | for( nm=std::max(0,np-2); nm<=np && ran>=excs; ++nm ) |
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307 | { |
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308 | for( nz=0; nz<numSec/3 && ran>=excs; ++nz ) |
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309 | { |
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310 | if( ++counter < numMul ) |
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311 | { |
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312 | nt = np+nm+nz; |
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313 | if( nt>0 && nt<=numSec ) |
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314 | { |
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315 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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316 | dum = (pi/anpn)*nt*protmul[counter]*protnorm[nt-1]/(2.0*n*n); |
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317 | if( std::fabs(dum) < 1.0 ) |
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318 | { |
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319 | if( test >= 1.0e-10 )excs += dum*test; |
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320 | } |
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321 | else |
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322 | excs += dum*test; |
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323 | } |
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324 | } |
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325 | } |
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326 | } |
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327 | } |
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328 | if( ran >= excs ) // 3 previous loops continued to the end |
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329 | { |
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330 | quasiElastic = true; |
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331 | return; |
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332 | } |
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333 | np--; nm--; nz--; |
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334 | G4int ncht = std::min( 3, std::max( 1, np-nm+1 ) ); |
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335 | switch( ncht ) |
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336 | { |
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337 | case 1: |
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338 | break; |
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339 | case 2: |
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340 | if( G4UniformRand() < 0.5 ) |
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341 | { |
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342 | targetParticle.SetDefinitionAndUpdateE( aNeutron ); |
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343 | targetHasChanged = true; |
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344 | } |
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345 | else |
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346 | { |
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347 | if( G4UniformRand() < 0.5 ) |
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348 | currentParticle.SetDefinitionAndUpdateE( anAntiLambda ); |
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349 | else |
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350 | currentParticle.SetDefinitionAndUpdateE( anAntiSigmaZero ); |
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351 | incidentHasChanged = true; |
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352 | } |
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353 | break; |
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354 | case 3: |
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355 | if( G4UniformRand() < 0.5 ) |
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356 | currentParticle.SetDefinitionAndUpdateE( anAntiLambda ); |
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357 | else |
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358 | currentParticle.SetDefinitionAndUpdateE( anAntiSigmaZero ); |
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359 | incidentHasChanged = true; |
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360 | targetParticle.SetDefinitionAndUpdateE( aNeutron ); |
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361 | targetHasChanged = true; |
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362 | break; |
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363 | } |
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364 | } |
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365 | else // target must be a neutron |
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366 | { |
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367 | counter = -1; |
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368 | for( np=0; np<numSec/3 && ran>=excs; ++np ) |
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369 | { |
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370 | for( nm=std::max(0,np-1); nm<=(np+1) && ran>=excs; ++nm ) |
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371 | { |
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372 | for( nz=0; nz<numSec/3 && ran>=excs; ++nz ) |
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373 | { |
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374 | if( ++counter < numMul ) |
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375 | { |
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376 | nt = np+nm+nz; |
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377 | if( nt>0 && nt<=numSec ) |
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378 | { |
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379 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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380 | dum = (pi/anpn)*nt*neutmul[counter]*neutnorm[nt-1]/(2.0*n*n); |
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381 | if( std::fabs(dum) < 1.0 ) |
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382 | { |
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383 | if( test >= 1.0e-10 )excs += dum*test; |
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384 | } |
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385 | else |
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386 | excs += dum*test; |
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387 | } |
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388 | } |
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389 | } |
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390 | } |
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391 | } |
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392 | if( ran >= excs ) // 3 previous loops continued to the end |
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393 | { |
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394 | quasiElastic = true; |
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395 | return; |
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396 | } |
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397 | np--; nm--; nz--; |
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398 | G4int ncht = std::min( 3, std::max( 1, np-nm+2 ) ); |
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399 | switch( ncht ) |
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400 | { |
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401 | case 1: |
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402 | { |
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403 | targetParticle.SetDefinitionAndUpdateE( aProton ); |
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404 | targetHasChanged = true; |
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405 | } |
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406 | break; |
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407 | case 2: |
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408 | if( G4UniformRand() < 0.5 ) |
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409 | { |
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410 | if( G4UniformRand() < 0.5 ) |
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411 | { |
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412 | currentParticle.SetDefinitionAndUpdateE( anAntiLambda ); |
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413 | incidentHasChanged = true; |
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414 | targetParticle.SetDefinitionAndUpdateE( aProton ); |
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415 | targetHasChanged = true; |
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416 | } |
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417 | } |
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418 | else |
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419 | { |
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420 | if( G4UniformRand() < 0.5 ) |
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421 | { |
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422 | currentParticle.SetDefinitionAndUpdateE( anAntiSigmaZero ); |
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423 | incidentHasChanged = true; |
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424 | targetParticle.SetDefinitionAndUpdateE( aProton ); |
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425 | targetHasChanged = true; |
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426 | } |
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427 | } |
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428 | break; |
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429 | case 3: |
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430 | if( G4UniformRand() < 0.5 ) |
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431 | currentParticle.SetDefinitionAndUpdateE( anAntiLambda ); |
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432 | else |
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433 | currentParticle.SetDefinitionAndUpdateE( anAntiSigmaZero ); |
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434 | incidentHasChanged = true; |
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435 | break; |
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436 | } |
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437 | } |
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438 | } |
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439 | else // random number <= anhl[iplab] |
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440 | { |
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441 | if( centerofmassEnergy <= aPiPlus->GetPDGMass()/MeV+aKaonPlus->GetPDGMass()/MeV ) |
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442 | { |
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443 | quasiElastic = true; |
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444 | return; |
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445 | } |
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446 | G4double n, anpn; |
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447 | GetNormalizationConstant( -centerofmassEnergy, n, anpn ); |
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448 | G4double ran = G4UniformRand(); |
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449 | G4double dum, excs = 0.0; |
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450 | if( targetParticle.GetDefinition() == aProton ) |
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451 | { |
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452 | counter = -1; |
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453 | for( np=2; np<numSec/3 && ran>=excs; ++np ) |
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454 | { |
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455 | nm=np-2; |
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456 | for( nz=0; nz<numSec/3 && ran>=excs; ++nz ) |
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457 | { |
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458 | if( ++counter < numMulA ) |
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459 | { |
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460 | nt = np+nm+nz; |
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461 | if( nt>1 && nt<=numSec ) |
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462 | { |
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463 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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464 | dum = (pi/anpn)*nt*protmulA[counter]*protnormA[nt-1]/(2.0*n*n); |
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465 | if( std::fabs(dum) < 1.0 ) |
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466 | { |
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467 | if( test >= 1.0e-10 )excs += dum*test; |
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468 | } |
---|
469 | else |
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470 | excs += dum*test; |
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471 | } |
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472 | } |
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473 | } |
---|
474 | } |
---|
475 | if( ran >= excs ) // 3 previous loops continued to the end |
---|
476 | { |
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477 | quasiElastic = true; |
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478 | return; |
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479 | } |
---|
480 | np--; nz--; |
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481 | } |
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482 | else // target must be a neutron |
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483 | { |
---|
484 | counter = -1; |
---|
485 | for( np=1; np<numSec/3 && ran>=excs; ++np ) |
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486 | { |
---|
487 | nm = np-1; |
---|
488 | for( nz=0; nz<numSec/3 && ran>=excs; ++nz ) |
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489 | { |
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490 | if( ++counter < numMulA ) |
---|
491 | { |
---|
492 | nt = np+nm+nz; |
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493 | if( nt>1 && nt<=numSec ) |
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494 | { |
---|
495 | test = std::exp( std::min( expxu, std::max( expxl, -(pi/4.0)*(nt*nt)/(n*n) ) ) ); |
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496 | dum = (pi/anpn)*nt*neutmulA[counter]*neutnormA[nt-1]/(2.0*n*n); |
---|
497 | if( std::fabs(dum) < 1.0 ) |
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498 | { |
---|
499 | if( test >= 1.0e-10 )excs += dum*test; |
---|
500 | } |
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501 | else |
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502 | excs += dum*test; |
---|
503 | } |
---|
504 | } |
---|
505 | } |
---|
506 | } |
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507 | if( ran >= excs ) // 3 previous loops continued to the end |
---|
508 | { |
---|
509 | quasiElastic = true; |
---|
510 | return; |
---|
511 | } |
---|
512 | np--; nz--; |
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513 | } |
---|
514 | if( nz > 0 ) |
---|
515 | { |
---|
516 | if( nm > 0 ) |
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517 | { |
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518 | if( G4UniformRand() < 0.5 ) |
---|
519 | { |
---|
520 | vec.Initialize( 1 ); |
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521 | G4ReactionProduct *p = new G4ReactionProduct; |
---|
522 | p->SetDefinition( aKaonMinus ); |
---|
523 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
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524 | vec.SetElement( vecLen++, p ); |
---|
525 | --nm; |
---|
526 | } |
---|
527 | else // random number >= 0.5 |
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528 | { |
---|
529 | vec.Initialize( 1 ); |
---|
530 | G4ReactionProduct *p = new G4ReactionProduct; |
---|
531 | p->SetDefinition( aKaonZL ); |
---|
532 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
---|
533 | vec.SetElement( vecLen++, p ); |
---|
534 | --nz; |
---|
535 | } |
---|
536 | } |
---|
537 | else // nm == 0 |
---|
538 | { |
---|
539 | vec.Initialize( 1 ); |
---|
540 | G4ReactionProduct *p = new G4ReactionProduct; |
---|
541 | p->SetDefinition( aKaonZL ); |
---|
542 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
---|
543 | vec.SetElement( vecLen++, p ); |
---|
544 | --nz; |
---|
545 | } |
---|
546 | } |
---|
547 | else // nz == 0 |
---|
548 | { |
---|
549 | if( nm > 0 ) |
---|
550 | { |
---|
551 | vec.Initialize( 1 ); |
---|
552 | G4ReactionProduct *p = new G4ReactionProduct; |
---|
553 | p->SetDefinition( aKaonMinus ); |
---|
554 | (G4UniformRand() < 0.5) ? p->SetSide( -1 ) : p->SetSide( 1 ); |
---|
555 | vec.SetElement( vecLen++, p ); |
---|
556 | --nm; |
---|
557 | } |
---|
558 | } |
---|
559 | currentParticle.SetMass( 0.0 ); |
---|
560 | targetParticle.SetMass( 0.0 ); |
---|
561 | } |
---|
562 | SetUpPions( np, nm, nz, vec, vecLen ); |
---|
563 | return; |
---|
564 | } |
---|
565 | |
---|
566 | /* end of file */ |
---|
567 | |
---|