1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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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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20 | // * By using, copying, modifying or distributing the software (or * |
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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: G4Mars5GeV.cc,v 1.14 2006/06/29 20:43:24 gunter Exp $ |
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28 | // GEANT4 tag $Name: $ |
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29 | // |
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30 | // |
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31 | // ------------------------------------------------------------ |
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32 | // GEANT 4 class header file |
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33 | // |
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34 | // |
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35 | // ------------------------------------------------------------ |
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36 | // First Implemention 17 Nov. 1998 M.Asai, H.Kurahige |
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37 | // |
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38 | // History: |
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39 | // modified as hadronic model 28 Oct 2001 N.Kanaya |
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40 | // ------------------------------------------------------------ |
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41 | // This is a Event Biasing mechanism based on MARS code |
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42 | // This model is applicable to |
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43 | // proton/neutron/pi+-/K+-/gamma/anti_proton |
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44 | // with energy < 5.0GeV |
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45 | // |
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46 | // Original code is MARS13 written by Nikolai Mokhov (FNAL) |
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47 | //************************************************************** |
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48 | //* MARS13: 9. hA EVENT GENERATOR: |
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49 | //* Copyright Nikolai Mokhov (Fermilab) |
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50 | //* |
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51 | //* LAST CHANGE: 14-NOV-1998 |
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52 | //************************************************************** |
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53 | //* Copyright Nikolai Mokhov (Fermilab) |
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54 | //* |
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55 | //* MARS13(98) |
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56 | //* |
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57 | //* INCLUSIVE HADRON(photon)-NUCLEUS VERTEX AT E < 5 GEV !!! |
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58 | //* THREE WEIGHTED HADRONS IN FINAL STATE: !!! |
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59 | //* IP+A -> N/P(CASC)+ PI+/PI-(K+/K-) + PI0 *// |
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60 | |
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61 | #include "globals.hh" |
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62 | #include "G4Mars5GeV.hh" |
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63 | #include <iostream> |
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64 | |
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65 | G4Mars5GeV::G4Mars5GeV() : G4InelasticInteraction(), |
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66 | maxWeight(1000.0), |
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67 | minWeight(perMillion) |
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68 | { |
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69 | std::cout << " MARS13(98)"<<std::endl; |
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70 | std::cout << std::endl; |
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71 | std::cout << " INCLUSIVE HADRON(photon)-NUCLEUS VERTEX AT E < 5 GEV !!! "<<std::endl; |
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72 | std::cout << " THREE WEIGHTED HADRONS IN FINAL STATE: !!!"<<std::endl; |
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73 | std::cout << " IP+A -> N/P(CASC)+ PI+/PI-(K+/K-) + PI0 "<<std::endl; |
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74 | std::cout << " *********************************************************"<<std::endl; |
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75 | std::cout << " Important notice! "<< std::endl; |
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76 | std::cout << " Since 1998 MARS codes used CEM (Cascade-Exciton Model) " << std::endl; |
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77 | std::cout << " for nuclear interactions below 5 GeV " << std::endl; |
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78 | std::cout << " and do NOT use this inclusive model. " << std::endl; |
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79 | |
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80 | std::cout << std::endl; |
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81 | |
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82 | SetMinEnergy( 1.0*MeV ); |
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83 | SetMaxEnergy( 5.0*GeV ); |
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84 | |
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85 | theParticleTable = G4ParticleTable::GetParticleTable(); |
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86 | G4ParticleDefinition* pProton = |
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87 | theParticleTable->FindParticle("proton"); |
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88 | if(pProton) ProtonMass = pProton->GetPDGMass(); |
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89 | |
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90 | // set some constants |
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91 | selec3.Eth = 0.001*MeV; |
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92 | } |
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93 | |
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94 | G4HadFinalState* G4Mars5GeV::ApplyYourself(const G4HadProjectile& aTrack, |
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95 | G4Nucleus& aTarget |
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96 | ) |
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97 | { |
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98 | theParticleChange.Clear(); |
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99 | #ifdef G4VERBOSE |
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100 | if (GetVerboseLevel() > 2) { |
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101 | G4cout << " G4Mars5GeV:ApplyYourself" << G4endl; |
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102 | } |
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103 | #endif |
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104 | |
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105 | // get the incident particle type |
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106 | incidentParticle = &aTrack; |
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107 | // get the incident particle energy/momentum |
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108 | incidentMarsEncoding = GetMarsEncoding(incidentParticle->GetDefinition()); |
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109 | |
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110 | // Atomic and charge number |
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111 | //GetTargetNuclei( aTrack.GetMaterial() ); |
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112 | fANucl = aTarget.GetN(); |
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113 | fZNucl = aTarget.GetZ(); |
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114 | |
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115 | // initialize secondary information |
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116 | numberOfSecondaries = 0; |
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117 | secondaries.Initialize(FastVectorSize); |
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118 | |
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119 | G4int idx; |
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120 | |
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121 | // invoke MARS |
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122 | Treem5(); |
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123 | |
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124 | // create secondaries |
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125 | // set max. number of secondaries |
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126 | |
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127 | for (idx=0; idx<numberOfSecondaries; idx+=1){ |
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128 | |
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129 | // check secondary weight |
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130 | G4double fweight = weightOfSecondaries[idx]; |
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131 | if (fweight > maxWeight) { |
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132 | #ifdef G4VERBOSE |
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133 | if (GetVerboseLevel() > 0) { |
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134 | G4cout << "G4Mars5GeV::ApplyYourself : too big secondary weight "; |
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135 | G4cout << " Weight = " << fweight << G4endl; |
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136 | secondaries[idx]->DumpInfo(); |
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137 | } |
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138 | #endif |
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139 | } else if (fweight < minWeight) { |
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140 | // track with small weight is neglected |
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141 | #ifdef G4VERBOSE |
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142 | if (GetVerboseLevel() > 2) { |
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143 | G4cout << "G4Mars5GeV::ApplyYourself : too small secondary weight "; |
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144 | G4cout << " Weight = " << fweight << G4endl; |
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145 | secondaries[idx]->DumpInfo(); |
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146 | } |
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147 | #endif |
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148 | } else { |
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149 | G4HadSecondary *track = new G4HadSecondary(secondaries[idx], fweight); |
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150 | // Remain unchanged, because this is a member function of G4HadFinalSate |
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151 | theParticleChange.AddSecondary(track); |
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152 | } |
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153 | } |
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154 | // kill incident particle |
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155 | theParticleChange.SetStatusChange(stopAndKill); |
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156 | |
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157 | return &theParticleChange; |
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158 | |
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159 | } |
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160 | |
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161 | |
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162 | void G4Mars5GeV::GetTargetNuclei(const G4Material* material) |
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163 | { |
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164 | // get elements in the actual material, |
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165 | const G4ElementVector* theElementVector = material->GetElementVector(); |
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166 | const G4double* theAtomicNumDensityVector = material->GetAtomicNumDensityVector(); |
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167 | const G4int numberOfElements = material->GetNumberOfElements() ; |
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168 | #ifdef G4VERBOSE |
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169 | if (GetVerboseLevel() > 2) { |
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170 | G4cout << " G4Mars5GeV::GetTargetNuclei" << G4endl; |
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171 | } |
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172 | #endif |
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173 | |
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174 | fANucl = 0.0; |
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175 | fZNucl = 0.0; |
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176 | G4double totNumAtoms = 0.0; |
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177 | for (G4int iel=0; iel < numberOfElements; iel +=1) { |
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178 | totNumAtoms += theAtomicNumDensityVector[iel]; |
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179 | |
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180 | fZNucl += |
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181 | theAtomicNumDensityVector[iel]*((*theElementVector)[iel]->GetZ()); |
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182 | fANucl += |
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183 | theAtomicNumDensityVector[iel]*((*theElementVector)[iel]->GetN()); |
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184 | |
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185 | //#ifdef G4VERBOSE |
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186 | // if (GetVerboseLevel() > 2) { |
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187 | G4cout << iel << ": " << theAtomicNumDensityVector[iel]; |
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188 | G4cout << " Z=" << (*theElementVector)[iel]->GetZ() << " A=" << |
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189 | (*theElementVector)[iel]->GetN(); |
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190 | G4cout << G4endl; |
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191 | // } |
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192 | //#endif |
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193 | } |
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194 | fANucl /= totNumAtoms; |
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195 | fZNucl /= totNumAtoms; |
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196 | #ifdef G4VERBOSE |
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197 | if (GetVerboseLevel() > 2) { |
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198 | G4cout << "<Z>=" << fZNucl; |
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199 | G4cout << "<A>=" << fANucl; |
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200 | G4cout << G4endl; |
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201 | } |
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202 | #endif |
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203 | } |
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204 | |
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205 | |
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206 | void G4Mars5GeV::Treem5() |
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207 | { |
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208 | |
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209 | // G4double pMass = incidentParticle->GetDefinition()->GetPDGMass(); |
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210 | G4double pE = incidentParticle->GetKineticEnergy(); |
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211 | G4int pType = incidentMarsEncoding; |
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212 | |
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213 | #ifdef G4VERBOSE |
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214 | if (GetVerboseLevel() > 2) { |
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215 | G4cout << " G4Mars5GeV::Treem5() "; |
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216 | G4cout << " Incident Particle: " << incidentParticle->GetDefinition()->GetParticleName(); |
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217 | G4cout << " : energy = " << pE/GeV << "[GeV]" << G4endl; |
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218 | } |
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219 | #endif |
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220 | |
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221 | // CoulombBarrier |
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222 | if (CoulombBarrier(pType, pE)) return; |
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223 | |
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224 | G4int ib; |
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225 | if (pType==MarsAP) { |
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226 | ib = MarsP; |
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227 | } else if (pType==MarsGAM){ |
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228 | if ( G4UniformRand() >0.5) { |
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229 | ib = MarsPIplus; |
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230 | } else { |
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231 | ib = MarsPIminus; |
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232 | } |
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233 | } else { |
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234 | ib = pType; |
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235 | } |
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236 | |
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237 | selec1.Einc = pE; |
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238 | if (pE < 0.5*MeV) pE = 0.5*MeV; |
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239 | selec3.Emax = pE; |
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240 | selec3.X = 0.0; |
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241 | selec3.Pt = 0.0; |
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242 | selec3.P = 0.0; |
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243 | |
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244 | // Nucleons at E < 5GeV |
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245 | CreateNucleon(ib, pType, pE); |
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246 | |
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247 | // Pion+- or Kaon+- at E < 5GeV |
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248 | CreatePion(ib, pType, pE); |
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249 | |
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250 | // Pi0 at E < 5GeV |
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251 | CreatePionZero(ib, pType, pE); |
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252 | } |
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253 | |
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254 | G4bool G4Mars5GeV::CoulombBarrier(G4int pType, G4double pE){ |
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255 | static const G4double EthCoulombBarrier = 20.0* MeV; |
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256 | static const G4double AvCoulomb = 1.11*MeV; |
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257 | static const G4double RCoulombTh = 1.0e-5; |
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258 | |
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259 | // CoulombBarrier |
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260 | if ( ( pType == MarsP) || ( pType ==MarsPIplus) || ( pType ==MarsKplus) ) { |
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261 | if ( ( pE < EthCoulombBarrier ) && (fANucl >=1.5) ) { |
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262 | G4double pMass = GetParticleDefinition(pType)->GetPDGMass(); |
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263 | G4double vCoulomb = AvCoulomb*std::pow(fZNucl/fANucl, 1./3.); |
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264 | G4double tc = pE*(fANucl*ProtonMass)/(pMass+(fANucl*ProtonMass)); |
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265 | G4double rCoulomb = 1.0-vCoulomb/tc; |
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266 | if ( rCoulomb < RCoulombTh ) { |
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267 | #ifdef G4VERBOSE |
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268 | if (GetVerboseLevel() > 2) { |
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269 | G4cout << " Can not interact because of Coulomb Barrier " << G4endl; |
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270 | } |
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271 | #endif |
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272 | return true; |
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273 | } |
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274 | } |
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275 | } |
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276 | return false; |
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277 | } |
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278 | |
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279 | void G4Mars5GeV::CreateNucleon(G4int ib, G4int pType, G4double ) |
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280 | { |
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281 | #ifdef G4VERBOSE |
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282 | if (GetVerboseLevel() > 2) { |
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283 | G4cout << " G4Mars5GeV::CreateNucleon()" << G4endl; |
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284 | } |
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285 | #endif |
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286 | if ( pType == MarsGAM) { |
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287 | selec1.Treac = MarsPIplus; |
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288 | selec1.Tprod = MarsN; |
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289 | selec1.V10 = 2.5; |
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290 | } else { |
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291 | if ( ib == MarsP ) { |
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292 | selec1.Treac = MarsP; |
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293 | } else if ( ib == MarsN ) { |
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294 | selec1.Treac = MarsN; |
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295 | } else if ( ib == MarsPIplus ) { |
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296 | selec1.Treac = MarsPIplus; |
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297 | } else if ( ib == MarsPIminus ) { |
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298 | selec1.Treac = MarsPIminus; |
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299 | } else if ( ib == MarsKplus ) { |
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300 | selec1.Treac = MarsPIplus; |
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301 | } else if ( ib == MarsKminus ) { |
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302 | selec1.Treac = MarsPIminus; |
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303 | } else { |
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304 | selec1.Treac = MarsPIminus; |
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305 | } |
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306 | if (G4UniformRand()<0.5) { |
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307 | selec1.Tprod = MarsN; |
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308 | } else { |
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309 | selec1.Tprod = MarsP; |
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310 | } |
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311 | selec1.V10 = 2.0; |
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312 | } |
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313 | |
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314 | //if ( SelBS(pType, fANucl, fZNucl) >0.0 ) AddSecondary(); |
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315 | if ( SelBS(pType, fANucl, fZNucl) >0.0 ) AddSecondaryToMarsList(); |
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316 | |
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317 | } |
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318 | |
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319 | void G4Mars5GeV::CreatePion(G4int ib, G4int pType, G4double pE) |
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320 | { |
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321 | #ifdef G4VERBOSE |
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322 | if (GetVerboseLevel() > 2) { |
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323 | G4cout << " G4Mars5GeV::CreatePion()" << G4endl; |
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324 | } |
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325 | #endif |
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326 | static const G4double PionProductionEth = 0.28*GeV; |
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327 | static const G4double KaonProductionEth = 2.0*GeV; |
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328 | |
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329 | if ( pE<PionProductionEth ) { |
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330 | if ((ib==MarsP)||(ib==MarsN)) return; |
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331 | pE += GetParticleDefinition(MarsPIminus)->GetPDGMass(); |
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332 | } |
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333 | selec1.Einc = pE; |
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334 | |
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335 | if ( ib == MarsP ) { |
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336 | selec1.Treac = MarsP; |
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337 | } else if ( ib == MarsN ) { |
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338 | selec1.Treac = MarsN; |
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339 | } else if ( ib == MarsPIplus ) { |
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340 | selec1.Treac = MarsPIplus; |
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341 | } else if ( ib == MarsPIminus ) { |
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342 | selec1.Treac = MarsPIminus; |
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343 | } else if ( ib == MarsKplus ) { |
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344 | selec1.Treac = MarsPIplus; |
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345 | } else if ( ib == MarsKminus ) { |
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346 | selec1.Treac = MarsPIminus; |
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347 | } else { |
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348 | selec1.Treac = MarsPIminus; |
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349 | } |
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350 | if (G4UniformRand()<0.5) { |
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351 | selec1.Tprod = MarsPIplus; |
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352 | } else { |
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353 | selec1.Tprod = MarsPIminus; |
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354 | } |
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355 | selec1.V10 = 2.1; |
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356 | if ( SelBS(pType, fANucl, fZNucl) >0.0 ){ |
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357 | // change secondary into Kaon |
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358 | if ( pE > KaonProductionEth ) { |
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359 | if ( Rkaon(ib,selec1.Tprod,pE) > G4UniformRand()) { |
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360 | if (selec1.Tprod==MarsPIminus) { |
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361 | selec1.Tprod=MarsKminus; |
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362 | } else { |
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363 | selec1.Tprod=MarsKplus; |
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364 | } |
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365 | } |
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366 | } |
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367 | //AddSecondary(); |
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368 | AddSecondaryToMarsList(); |
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369 | } |
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370 | } |
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371 | |
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372 | void G4Mars5GeV::CreatePionZero(G4int ib, G4int pType, G4double pE) |
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373 | { |
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374 | #ifdef G4VERBOSE |
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375 | if (GetVerboseLevel() > 2) { |
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376 | G4cout << " G4Mars5GeV::CreatePionZero()" << G4endl; |
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377 | } |
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378 | #endif |
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379 | static const G4double PionProductionEth = 0.28*GeV; |
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380 | |
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381 | if ( pE<PionProductionEth ) { |
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382 | if ((ib==MarsP)||(ib==MarsN)) return; |
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383 | } |
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384 | |
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385 | if ( ib == MarsP ) { |
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386 | selec1.Treac = MarsP; |
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387 | } else if ( ib == MarsN ) { |
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388 | selec1.Treac = MarsN; |
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389 | } else if ( ib == MarsPIplus ) { |
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390 | selec1.Treac = MarsPIplus; |
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391 | } else if ( ib == MarsPIminus ) { |
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392 | selec1.Treac = MarsPIminus; |
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393 | } else if ( ib == MarsKplus ) { |
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394 | selec1.Treac = MarsPIplus; |
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395 | } else if ( ib == MarsKminus ) { |
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396 | selec1.Treac = MarsPIminus; |
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397 | } else { |
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398 | selec1.Treac = MarsPIminus; |
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399 | } |
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400 | selec1.Tprod = MarsKplus; |
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401 | selec1.V10 = 1.0; |
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402 | if ( SelBS(pType, fANucl, fZNucl) >0.0 ) { |
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403 | selec1.Tprod = MarsPI0; |
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404 | //AddSecondary(); |
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405 | AddSecondaryToMarsList(); |
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406 | } |
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407 | } |
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408 | |
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409 | //void G4Mars5GeV::AddSecondary() |
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410 | void G4Mars5GeV::AddSecondaryToMarsList() |
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411 | { |
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412 | #ifdef G4VERBOSE |
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413 | if (GetVerboseLevel() > 2) { |
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414 | G4cout << " G4Mars5GeV::AddSecondaryToMarsList()" << G4endl; |
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415 | G4cout << " Particle :" << selec1.Tprod; |
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416 | G4cout << ":" << GetParticleName(selec1.Tprod) <<G4endl; |
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417 | G4cout << " Energy :" << selec1.EN <<G4endl; |
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418 | G4cout << "Weight :" << selec1.V << G4endl; |
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419 | } |
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420 | #endif |
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421 | // determine direction cosine |
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422 | G4double g = 1.0; |
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423 | while (g>=1.0) { |
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424 | G4double g1 = G4UniformRand(); |
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425 | G4double g2 = G4UniformRand(); |
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426 | G4double gg = 2.0*g1 - 1.0; |
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427 | g = gg*gg + g2*g2; |
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428 | selec2.Ch = (gg*gg - g2*g2)/g; |
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429 | selec2.Sh = 2.0*gg*g2/g; |
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430 | } |
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431 | G4ThreeVector pin = incidentParticle->Get4Momentum().vect().unit(); |
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432 | G4ThreeVector pout; |
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433 | |
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434 | Trans(&pin, &pout); |
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435 | if (numberOfSecondaries>=FastVectorSize) { |
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436 | G4String text = " G4Mars5GeV::AddSecondaryToMarsList() too many secondaries"; |
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437 | throw G4HadronicException(__FILE__, __LINE__, text); |
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438 | } |
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439 | |
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440 | // create seconday Dynamic Particle |
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441 | G4DynamicParticle* secondary = |
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442 | new G4DynamicParticle(GetParticleDefinition(selec1.Tprod), |
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443 | pout.unit(), |
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444 | selec1.EN); |
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445 | // add secondary into list |
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446 | |
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447 | secondaries.SetElement(numberOfSecondaries, secondary); |
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448 | weightOfSecondaries[numberOfSecondaries] = selec1.V; |
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449 | numberOfSecondaries +=1; |
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450 | } |
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451 | |
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452 | G4double G4Mars5GeV::SelBS(G4int pType, G4double aNucl, G4double zNucl) |
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453 | { |
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454 | static const G4double Atau= 0.2; |
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455 | static const G4double Btau= 0.5*GeV; |
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456 | |
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457 | G4int nc = 0; |
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458 | G4int ip = selec1.Treac; // reaction particle type |
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459 | G4int jp = selec1.Tprod; // procduction particle type |
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460 | G4int jj = pType; // incident particle type |
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461 | G4double e0 = selec1.Einc; |
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462 | G4double en; |
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463 | G4double v2 = 0.0; |
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464 | |
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465 | #ifdef G4VERBOSE |
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466 | if (GetVerboseLevel() > 2) { |
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467 | G4cout << " G4Mars5GeV::SelBS" << G4endl; |
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468 | G4cout << " pType = " << pType << " e0 = " << e0 << G4endl; |
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469 | G4cout << " aNucl = " << aNucl << " zNucl = " << zNucl << G4endl; |
---|
470 | G4cout << " Treac = " <<selec1.Treac; |
---|
471 | G4cout << " Tprod = " <<selec1.Tprod << G4endl; |
---|
472 | } |
---|
473 | #endif |
---|
474 | |
---|
475 | while(1){ |
---|
476 | |
---|
477 | G4double g1 = G4UniformRand(); |
---|
478 | G4double g2 = G4UniformRand(); |
---|
479 | |
---|
480 | // calculate energy |
---|
481 | G4double dw = 0.0; |
---|
482 | if (ip==jp) { |
---|
483 | G4double ea = e0 * 0.01; |
---|
484 | if (ea < selec3.Eth) { |
---|
485 | dw = selec3.Emax-selec3.Eth; |
---|
486 | en = selec3.Eth + g1*dw; |
---|
487 | } else { |
---|
488 | G4double cb = std::log(ea/selec3.Eth); |
---|
489 | G4double ca = cb + 99.0; |
---|
490 | if (g1<cb/ca) { |
---|
491 | en = selec3.Eth*std::exp(g1*ca); |
---|
492 | dw = en*ca; |
---|
493 | } else { |
---|
494 | en = ea*(g1*ca + 1.0 - cb); |
---|
495 | dw = ea*ca; |
---|
496 | } |
---|
497 | } |
---|
498 | } else { |
---|
499 | en = selec3.Eth*std::pow(selec3.Emax/selec3.Eth, g1); |
---|
500 | dw = en*std::log(selec3.Emax/selec3.Eth); |
---|
501 | } |
---|
502 | |
---|
503 | selec1.EN = en; |
---|
504 | |
---|
505 | #ifdef G4VERBOSE |
---|
506 | if (GetVerboseLevel() > 2) { |
---|
507 | G4cout << "selec1.EN = " << en << G4endl; |
---|
508 | } |
---|
509 | #endif |
---|
510 | |
---|
511 | if (en<0.5*MeV) { |
---|
512 | selec1.V = 0.0; |
---|
513 | return selec1.V; |
---|
514 | } |
---|
515 | |
---|
516 | // calculate direction cosine |
---|
517 | G4double tau = en/Atau/e0*(Btau+e0)/GeV; |
---|
518 | G4double c5 = 1.0-std::exp(-pi*tau); |
---|
519 | G4double c4 = 1.0-g2*c5; |
---|
520 | G4double t1 = -std::log(c4)/tau; |
---|
521 | G4double rcs = std::cos(t1); |
---|
522 | G4double rss = std::sqrt(1.0-rcs*rcs); |
---|
523 | G4double da = 2.0*pi*rss*c5/(tau*c4); |
---|
524 | selec2.Cs = rcs; |
---|
525 | selec2.Ss = rss; |
---|
526 | |
---|
527 | // select particle type |
---|
528 | G4int ib = ip; |
---|
529 | if (ip == MarsP) { |
---|
530 | ib = MarsN; |
---|
531 | } else if (ip == MarsN) { |
---|
532 | ib = MarsP; |
---|
533 | } |
---|
534 | G4int jb = jp; |
---|
535 | if ( ( jj==MarsGAM ) && ((jp!=MarsP)||(jp!=MarsN)) ){ |
---|
536 | jb = MarsKplus; |
---|
537 | } else if (jp == MarsP) { |
---|
538 | jb = MarsN; |
---|
539 | } else if (jp == MarsN) { |
---|
540 | jb = MarsP; |
---|
541 | } |
---|
542 | |
---|
543 | // calculate V |
---|
544 | nc +=1; |
---|
545 | v2 = dw*D2N2(jj, e0, en, t1, ib, jb, aNucl, zNucl)*da*(selec1.V10); |
---|
546 | #ifdef G4VERBOSE |
---|
547 | if (GetVerboseLevel() > 2) { |
---|
548 | G4cout << " D2N2 = " << v2/(dw*da*(selec1.V10)); |
---|
549 | G4cout << " v2 = " << v2 << G4endl; |
---|
550 | } |
---|
551 | #endif |
---|
552 | |
---|
553 | if (v2>0.0) break; |
---|
554 | |
---|
555 | if (nc >=3) { |
---|
556 | selec1.V = 0.0; |
---|
557 | #ifdef G4VERBOSE |
---|
558 | if (GetVerboseLevel() > 2) { |
---|
559 | G4cout << "exceed retry limit !!" << G4endl; |
---|
560 | } |
---|
561 | #endif |
---|
562 | return selec1.V; |
---|
563 | } |
---|
564 | } |
---|
565 | selec1.V = v2; |
---|
566 | return v2; |
---|
567 | } |
---|
568 | |
---|
569 | |
---|
570 | G4double G4Mars5GeV::D2N2(G4int pType, G4double incidentE, |
---|
571 | G4double prodE, G4double tin, |
---|
572 | G4int reacType, G4int proType, |
---|
573 | G4double ai, G4double z) |
---|
574 | { |
---|
575 | // Hadron inclusive yield at E0 < 5 GeV |
---|
576 | // All parametrizations are based on |
---|
577 | // the energy unit of MeV |
---|
578 | // |
---|
579 | // Original code is written by Nikolai Mokhov (Fermilab) |
---|
580 | //C Copyright Nikolai Mokhov (Fermilab) |
---|
581 | //C |
---|
582 | //C MARS13(98) |
---|
583 | //C |
---|
584 | //C HADRON INCLUSIVE YIELD AT E0 < 5 GEV |
---|
585 | //C----- |
---|
586 | //C CREATED: 1979 BY B.SYCHEV |
---|
587 | //C MODIFIED: 1979-1998 BY NVM |
---|
588 | //C LAST CHANGE: 16-JUL-1998 BY NVM |
---|
589 | |
---|
590 | static const G4double o2pi = 1./twopi; |
---|
591 | static const G4double ospi = 1./std::sqrt(pi); |
---|
592 | |
---|
593 | static G4double abu = 0.0; |
---|
594 | static G4double alga = 0.0; |
---|
595 | static G4double a13 = 1.0; |
---|
596 | static G4double a23 = 1.0; |
---|
597 | static G4double a125 = 1.0; |
---|
598 | static G4double am25 = 0.0; |
---|
599 | static G4double sqa = 1.0; |
---|
600 | static G4double sqa1 = 0.0; |
---|
601 | static G4double bm = 2.0; |
---|
602 | static G4double sl; |
---|
603 | static G4double sa; |
---|
604 | |
---|
605 | // input of this method |
---|
606 | G4double e0 = incidentE/MeV; // SHOULD BE GIVEN BY MEV !!! |
---|
607 | G4double e = prodE/MeV; // SHOULD BE GIVEN BY MEV !!! |
---|
608 | G4double t = tin; |
---|
609 | G4int i = reacType; |
---|
610 | G4int j = proType; |
---|
611 | G4int jj = pType; |
---|
612 | |
---|
613 | // output of this method |
---|
614 | G4double d2n = 0.0; |
---|
615 | G4double dnde = 0.0; // this value is not used anywhere else |
---|
616 | |
---|
617 | if(ai<1.0) return 0.0; |
---|
618 | |
---|
619 | G4double a = ai; |
---|
620 | if(abu!=a) |
---|
621 | { |
---|
622 | abu = a; |
---|
623 | if(a<=2.0) |
---|
624 | { |
---|
625 | alga = 0.0; |
---|
626 | a13 = 1.0; |
---|
627 | a23 = 1.0; |
---|
628 | a125 = 1.0; |
---|
629 | am25 = 0.0; |
---|
630 | sqa = 1.0; |
---|
631 | sqa1 = 0.0; |
---|
632 | bm = 2.0; |
---|
633 | } |
---|
634 | else |
---|
635 | { |
---|
636 | alga = std::log(a); |
---|
637 | a13 = std::pow(a,1./3.); |
---|
638 | a23 = a13*a13; |
---|
639 | a125 = std::pow(a,-1.25); |
---|
640 | am25 = std::pow(a-1.0,0.25); |
---|
641 | sqa = std::sqrt(a); |
---|
642 | sqa1 = std::sqrt(a-1.); |
---|
643 | bm = 1.0 + sqa; |
---|
644 | } |
---|
645 | sl = 0.72/std::pow(1.+alga,0.4); |
---|
646 | sa = 0.087*a23 + 4.15; |
---|
647 | } |
---|
648 | |
---|
649 | G4double bn; |
---|
650 | if(a<=2.0) |
---|
651 | { |
---|
652 | if(i*j<9 && t>halfpi) return 0.0; |
---|
653 | bn = 2.0; |
---|
654 | if(i>=3) bn = 1.0; |
---|
655 | } |
---|
656 | else |
---|
657 | { bn = bm*std::exp(-sa*std::pow(3.68/e0,sl)); } |
---|
658 | |
---|
659 | G4double emm = e0; |
---|
660 | G4double e1ge = 0.001*e0; |
---|
661 | G4double e2ge = e1ge*e1ge; |
---|
662 | G4double f21 = 0.04/(e2ge*e2ge); |
---|
663 | G4double f31 = 0.38*std::pow(e1ge,-0.65); |
---|
664 | G4double f22 = 0.25/e2ge; |
---|
665 | G4double f32 = am25*0.7/(e1ge+1.); |
---|
666 | G4double ei2 = 0.0; |
---|
667 | G4double x1 = f21 + f31; |
---|
668 | if(x1<60.) ei2 = 0.8*std::exp(-x1); |
---|
669 | G4double ei1 = ei2; |
---|
670 | if(a>2.0) |
---|
671 | { |
---|
672 | ei1 = 0.; |
---|
673 | x1 = f22 + f32; |
---|
674 | if(x1<60.) ei1 = std::exp(-x1); |
---|
675 | } |
---|
676 | |
---|
677 | G4double ew1 = ei2; |
---|
678 | G4double dnl = 0.0; |
---|
679 | G4double dnl1 = 0.0; |
---|
680 | G4double eli = 0.0; |
---|
681 | if(ew1>=1.e-19) |
---|
682 | { |
---|
683 | G4double dli = 35.0*ew1/(a+69.0); |
---|
684 | eli = 0.5*dli*e0; |
---|
685 | if(i==j) |
---|
686 | { dnl1 = dli*(2./3.)/e0; } |
---|
687 | else |
---|
688 | { dnl1 = dli*(1.-e/e0)/e0; } |
---|
689 | dnl = dli*(5./3.-e/e0)/e0; |
---|
690 | } |
---|
691 | |
---|
692 | G4double qel = 1.0 - ei1; |
---|
693 | if(a>2.0) |
---|
694 | { |
---|
695 | G4double e02 = std::pow(e0/350.,1.5); |
---|
696 | G4double ex2 = 1.0; |
---|
697 | if(e02<60.) ex2 = 1.0-std::exp(-e02); |
---|
698 | qel = 0.0; |
---|
699 | if(t<halfpi) qel = 1.17*ex2*std::exp(-0.08*sqa1)*(1.-ew1); |
---|
700 | } |
---|
701 | |
---|
702 | G4int in = i; // save i |
---|
703 | G4double sw2 = (0.5+10.*e2ge/(2.+e1ge))*(4.+e0/470.); |
---|
704 | G4double sql = sw2/(2.+e0/940.)-1.0; |
---|
705 | G4double eql = 0.0; |
---|
706 | G4double dnq = 0.0; |
---|
707 | |
---|
708 | if(jj!=MarsGAM || j!=5) |
---|
709 | { |
---|
710 | if(qel>1.e-25) |
---|
711 | { |
---|
712 | eql = qel*e0*(sql+1.)/(sql+2.); |
---|
713 | G4double bp1x = -60./std::log(e/e0); |
---|
714 | if(sql<=bp1x) |
---|
715 | { |
---|
716 | bp1x = std::pow(e/e0,sql); |
---|
717 | dnq = qel/e0*(sql+1.)*bp1x; |
---|
718 | } |
---|
719 | } |
---|
720 | } |
---|
721 | |
---|
722 | G4double bp1 = e0; |
---|
723 | if(e0<1.e9) bp1 = std::sqrt(e0*e0+1880.*e0); |
---|
724 | G4double pul = 1.e-3*bp1; |
---|
725 | bp1 = 3.*std::pow(pul,0.25) - 2.0; |
---|
726 | if(bp1<1.) bp1 = 1.; |
---|
727 | G4double bpi = 0.0; |
---|
728 | if(ei1>0.) bpi = bp1*std::exp(0.075*sqa1)*ei1; |
---|
729 | G4double ec = 0.0; |
---|
730 | if(a>2.0) ec = 10.5 - 0.02*a; |
---|
731 | G4double g = 0.1*alga + 0.2; |
---|
732 | G4double eog = std::pow(e0,g); |
---|
733 | G4double f1 = 1./3.*ec*a/(1.8*eog); |
---|
734 | x1 = 1.0; |
---|
735 | if(f1<60.) x1 = 1.0 - std::exp(-f1); |
---|
736 | G4double fm = 1.8*eog*x1; |
---|
737 | G4double ez = ec + fm; |
---|
738 | if(fm>=e0) ez = ec + e0; |
---|
739 | G4double d = 1.0; |
---|
740 | if(i>=3) d = 0.0; |
---|
741 | x1 = 1.0; |
---|
742 | if(a<=44.) x1 = std::exp(-std::exp(4.-a)); |
---|
743 | G4double ez2 = 33.5*a125*x1*(ez-ec)*(1.-ez/(ec-e0)); |
---|
744 | G4double epw = e0 - ez - (bn-d)*ec - 140.*bpi - ez2; |
---|
745 | G4double e2 = epw - eli - eql; |
---|
746 | |
---|
747 | G4double ak1 = 3.0; |
---|
748 | G4double ak20 = 5.e-4*(1.+a13)*e0; |
---|
749 | x1 = 1.0; |
---|
750 | if(ak20<60.) x1 = 1.0 - std::exp(-ak20); |
---|
751 | G4double ga = std::pow(e1ge,0.06)*ak1*x1; |
---|
752 | G4double egr = e0/(ga+1.); |
---|
753 | G4double d2 = 250.*(1.+2.5*e0*std::exp(-0.02*a)/(e0+1.e3))/sqa; |
---|
754 | G4double aea = e2/(e0*(1./(1.+ga)-d2*std::log(1.+egr/d2)/e0)); |
---|
755 | aea *= 1./(1.+d2*(ga+1.)/(3.*e0*(d2/e0+1.75))); |
---|
756 | if(i<=2 && j>=3) |
---|
757 | { |
---|
758 | emm = e0 - 140.; |
---|
759 | if(j!=5 && a!=1. && (i+j)!=5) emm = e0 - 280; |
---|
760 | } |
---|
761 | G4double dn = 0.0; |
---|
762 | if(e<=emm) dn = aea*(e0/emm)*std::pow(1.-e/emm,ga)/(e+d2); |
---|
763 | if(i>=3) bpi += 1; |
---|
764 | dnde = dn + dnq + dnl; |
---|
765 | // In original code, check nupr. But in this code, nupr is aliways set to 0 |
---|
766 | // if(nupr==1) return; |
---|
767 | |
---|
768 | G4double pna = bpi/bp1; |
---|
769 | G4double pns = bn+bpi; |
---|
770 | |
---|
771 | // Angular distribution |
---|
772 | G4double qe = 0.0; |
---|
773 | if((jj!=MarsGAM || j!=5) |
---|
774 | &&(t<halfpi) |
---|
775 | &&(i<3||i==j||j>4) |
---|
776 | &&(i>2||j<3) |
---|
777 | &&(a>2.0||i!=2||j!=1) |
---|
778 | &&(qel>=1.e-26)) |
---|
779 | { |
---|
780 | G4double d1 = 25.*(1.+0.008*e0*t); |
---|
781 | G4double dp; |
---|
782 | if(i==j) |
---|
783 | { dp = 0.8; } |
---|
784 | else |
---|
785 | { dp = 0.2; } |
---|
786 | if(a<=2.&&i==1&&j<=2) dp = 0.5; |
---|
787 | if(a<=2.&&i==2&&j==2) dp = 1.0; |
---|
788 | G4double eq = e0*sqr(std::cos(t))/(1.+e0*sqr(std::sin(t))/1880.) - 25.0; |
---|
789 | G4double exq = sqr((e-eq)/d1) + 0.5*sw2*t*t; |
---|
790 | if(exq<60.) qe = qel*sw2*std::exp(-exq)*dp*ospi/d1; |
---|
791 | } |
---|
792 | |
---|
793 | G4int iold = i; |
---|
794 | if(i==3) i = 2; |
---|
795 | if(i==4) i = 1; |
---|
796 | G4bool condA = a<2. && i==2; |
---|
797 | G4bool condB = a<2.; |
---|
798 | G4double az(0); |
---|
799 | G4double pn; |
---|
800 | G4double pr(0); |
---|
801 | if(!condB) |
---|
802 | { |
---|
803 | if(i==2) |
---|
804 | { az = (z+1.)/(a-z); } |
---|
805 | else |
---|
806 | { az = (a+1.-z)/z; } |
---|
807 | x1 = 0.5*e1ge; |
---|
808 | pn = az; |
---|
809 | if(x1<60.) pn *= 1. + std::exp(-x1); |
---|
810 | if(i==j) |
---|
811 | { pr = bn*pn/(1.+pn); } |
---|
812 | else |
---|
813 | { pr = bn/(1.+pn); } |
---|
814 | } |
---|
815 | if(condA || !condB) |
---|
816 | { |
---|
817 | if(i==1) az = z/(a-z); |
---|
818 | if(i==2) az = (a-z)/z; |
---|
819 | G4double bp = 1.0; |
---|
820 | G4double e0g = e1ge*e2ge; |
---|
821 | if(e0g<60.) bp -= 0.5*std::exp(-e0g); |
---|
822 | G4double ap = az * bp; |
---|
823 | bp = 6.*(1.+ap); |
---|
824 | if((i==1&&j==3)||(i==2&&j==4)) pr = pna*(bp1/3.-(2.+ap)/bp); |
---|
825 | if((i==2&&j==3)||(i==1&&j==4)) pr = pna*(bp1/3.+(3.-ap)/bp); |
---|
826 | if(j==5) pr = pna*(bp1/3.+(2.*ap-1.)/bp); |
---|
827 | } |
---|
828 | if(condB) |
---|
829 | { |
---|
830 | switch(i) |
---|
831 | { |
---|
832 | case 1: |
---|
833 | switch(j) |
---|
834 | { |
---|
835 | case 1: |
---|
836 | case 2: |
---|
837 | pr = bn/2.; break; |
---|
838 | case 3: |
---|
839 | case 4: |
---|
840 | pr = pna*(bp1/3.-1./6.); break; |
---|
841 | case 5: |
---|
842 | pr = pna*(bp1+1.)/3.; break; |
---|
843 | } |
---|
844 | break; |
---|
845 | case 2: |
---|
846 | switch(j) |
---|
847 | { |
---|
848 | case 1: |
---|
849 | pr = 0.33*ew1/bn; break; |
---|
850 | case 2: |
---|
851 | pr = (1.-0.33*ew1)/bn; break; |
---|
852 | } |
---|
853 | break; |
---|
854 | } |
---|
855 | } |
---|
856 | |
---|
857 | G4double ek3 = 0.01*std::sqrt(e1ge)*(1.+alga/4.); |
---|
858 | G4double tay = 200.*e0/(e0+560.); |
---|
859 | G4double w = e/tay; |
---|
860 | G4double ek4 = 1.21*e0*w/(std::sqrt(1.+alga)*(e0+2000.)); |
---|
861 | if(j>=3) ek4 = 0.3*w*(e0-1000.)/(e0+1000.); |
---|
862 | G4double wpic = w*pi; |
---|
863 | G4double w2 = w*w; |
---|
864 | G4double ex8 = 1.0; |
---|
865 | if(wpic<60.) ex8 /= 1.0 + std::exp(-wpic); |
---|
866 | G4double ek = (1.+w2)*(1.+5.2*ek4/(2.+w2))*ex8; |
---|
867 | G4double wtw = 2.*(std::sqrt(1.+ek3*e*t*1.e-3)-1.)/(tay*ek3*1.e-3)+ek4*t*t; |
---|
868 | G4double sm = 0.0; |
---|
869 | if(dn>=1.e-26 && wtw<60.) sm = pr*dn*ek*std::exp(-wtw)/pns; |
---|
870 | |
---|
871 | G4double dl = 0.0; |
---|
872 | i = iold; |
---|
873 | if((dnl1>=1.e-20) |
---|
874 | &&(i<3||i==j||j>4) |
---|
875 | &&(i>2||j<3)) |
---|
876 | { |
---|
877 | tay = 200.*e0/(e0+2600.); |
---|
878 | w = e/tay; |
---|
879 | ek4 = 1.21*e0*w/(std::sqrt(1.+alga)*(e0+2000.)); |
---|
880 | i = in; |
---|
881 | wpic = w*pi; |
---|
882 | w2 = w*w; |
---|
883 | ex8 = 1.0; |
---|
884 | if(wpic<60.) ex8 /= 1.0 + std::exp(-wpic); |
---|
885 | wtw = w*t + ek4*t*t; |
---|
886 | if(wtw<60.) |
---|
887 | { |
---|
888 | G4double ft = (1.+w2)*(1.+5.2*ek4/(2.+w2))*std::exp(-wtw)*ex8; |
---|
889 | if(ft>=1.-16) |
---|
890 | { |
---|
891 | G4double dp; |
---|
892 | if(i==j) |
---|
893 | { dp = 2./3.; } |
---|
894 | else |
---|
895 | { dp = 1./3.; } |
---|
896 | if(a<=2.&&i==1&&j==2) dp = 0.5; |
---|
897 | dl = dp*dnl1*ft; |
---|
898 | } |
---|
899 | } |
---|
900 | } |
---|
901 | |
---|
902 | if(jj==MarsGAM && j==5) |
---|
903 | { |
---|
904 | sm *= 0.6; |
---|
905 | dl *= 2.0; |
---|
906 | } |
---|
907 | d2n = o2pi*(qe+sm+dl); |
---|
908 | // d2n value is calculated in unit of [1/MeV] |
---|
909 | |
---|
910 | d2n *= (1./MeV); |
---|
911 | return d2n; |
---|
912 | } |
---|
913 | |
---|
914 | |
---|
915 | G4double G4Mars5GeV::Rkaon(G4int ib, G4int jp, G4double eRaw) |
---|
916 | { |
---|
917 | // Energy dependent K/pi ratio |
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918 | // Parametrizations are valid for energy range of |
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919 | // incident particle as 2.0 GeV to 100 GeV |
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920 | // All parametrizations in this method are based on |
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921 | // the energy unit of GeV. |
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922 | // |
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923 | // Original code is written by Nikolai Mokhov (Fermilab) |
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924 | //C Copyright Nikolai Mokhov (Fermilab) |
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925 | //C |
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926 | //C MARS13(98) |
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927 | //C ENERGY DEPENDENT K/PI RATIO |
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928 | //C FOR GIVEN TREEM AND SELMO PARAMETERS |
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929 | //C----- |
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930 | //C CREATED: 1996 BY N.MOKHOV (NVM) |
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931 | //C LAST CHANGE: 12-FEB-1996 BY NVM |
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932 | |
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933 | static const G4double rkp = 0.071; |
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934 | static const G4double rkm = 0.083; |
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935 | static const G4double al2 = 0.69314718; |
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936 | static const G4double al100 = 4.6051702; |
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937 | static const G4double al21 = 3.0445224; |
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938 | static const G4double al51 = 3.9318256; |
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939 | |
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940 | G4double eGeV = eRaw / GeV; |
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941 | G4double rK = 0.; |
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942 | if(eGeV < 2.1) return rK; |
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943 | G4double ale = std::log(eGeV); |
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944 | |
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945 | // No.1 |
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946 | rK = rkp; |
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947 | if(jp == MarsPIminus) rK = rkm; |
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948 | if(ib == MarsPIplus || ib == MarsPIminus) rK *= 1.3; |
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949 | else if(ib == MarsKplus || ib == MarsKminus) rK *= 2.0; |
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950 | G4double rK1 = rK; |
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951 | if(eGeV<100.) |
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952 | { |
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953 | G4double rmi = 0.03; |
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954 | if(ib >= MarsPIplus) rmi = 0.08; |
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955 | rK1 = rmi + (rK-rmi)*(ale-al2)/(al100-al2); |
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956 | } |
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957 | |
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958 | // No.2 |
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959 | if(eGeV<=5.2 || eGeV>=51.0) { |
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960 | rK = 1.3*rK1; |
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961 | } else if(eGeV<7.2) { |
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962 | rK = rK1*(1.3+0.15*(eGeV-5.2)); |
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963 | } else if(eGeV<21.) { |
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964 | rK = 1.6*rK1; |
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965 | } else { |
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966 | rK = rK1*(1.3+0.3*(al51-ale)/(al51-al21)); |
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967 | } |
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968 | |
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969 | return rK; |
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970 | } |
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971 | |
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972 | void G4Mars5GeV::Trans(G4ThreeVector* d1,G4ThreeVector* d2) |
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973 | { |
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974 | |
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975 | #ifdef G4VERBOSE |
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976 | if (GetVerboseLevel() > 2) { |
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977 | G4cout << " G4Mars5GeV::Trans() " << G4endl; |
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978 | } |
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979 | #endif |
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980 | // Direction cosine transformation |
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981 | // using (cs,ss,ch,sh) |
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982 | |
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983 | // inputs |
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984 | G4double cs = selec2.Cs; |
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985 | G4double ss = selec2.Ss; |
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986 | G4double ch = selec2.Ch; |
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987 | G4double sh = selec2.Sh; |
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988 | |
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989 | G4double sss, ttt, uuu; |
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990 | G4double dx1 = d1->x(); |
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991 | G4double dy1 = d1->y(); |
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992 | G4double dz1 = d1->z(); |
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993 | G4double sz = dx1*dx1 + dy1*dy1; |
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994 | if(sz > 1.e-50) |
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995 | { |
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996 | sz = std::sqrt(sz); |
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997 | sss = ss*(ch*dz1*dx1-sh*dy1)/sz + cs*dx1; |
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998 | ttt = ss*(ch*dz1*dy1+sh*dx1)/sz + cs*dy1; |
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999 | uuu = - ss*ch*sz + cs*dz1; |
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1000 | } |
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1001 | else |
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1002 | { |
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1003 | sss = ss*ch + dx1; |
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1004 | ttt = ss*sh + dy1; |
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1005 | uuu = cs*dz1; |
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1006 | } |
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1007 | G4double den = std::sqrt(sss*sss+uuu*uuu+ttt*ttt); |
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1008 | d2->setX(sss/den); |
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1009 | d2->setY(ttt/den); |
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1010 | d2->setZ(uuu/den); |
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1011 | return; |
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1012 | } |
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