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2 | // ******************************************************************** |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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18 | // * This code implementation is the result of the scientific and * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4ProjectileDiffractiveChannel.cc,v 1.2 2007/11/15 16:07:42 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 | // Author : Gunter Folger Nov 2007 |
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32 | // Class Description |
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33 | // Final state production model for theoretical models of hadron inelastic |
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34 | // projectile diffractive scattering in geant4; |
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35 | // Class Description - End |
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36 | // |
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37 | // Modified: |
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38 | |
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39 | #include "G4ProjectileDiffractiveChannel.hh" |
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40 | |
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41 | #include "G4HadTmpUtil.hh" //lrint |
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42 | #include "G4QHadronVector.hh" |
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43 | #include "G4ParticleTable.hh" |
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44 | #include "G4IonTable.hh" |
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45 | #include "G4Lambda.hh" |
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46 | |
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47 | //#define debug_getFraction 1 |
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48 | //#define debug_scatter 1 |
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49 | |
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50 | G4ProjectileDiffractiveChannel::G4ProjectileDiffractiveChannel() |
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51 | { |
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52 | theQDiffraction=G4QDiffractionRatio::GetPointer(); |
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53 | } |
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54 | |
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55 | G4ProjectileDiffractiveChannel::~G4ProjectileDiffractiveChannel() |
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56 | {} |
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57 | |
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58 | G4double G4ProjectileDiffractiveChannel::GetFraction(G4Nucleus &theNucleus, |
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59 | const G4DynamicParticle & thePrimary) |
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60 | { |
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61 | G4double ratio; |
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62 | ratio=theQDiffraction->GetRatio(thePrimary.GetTotalMomentum(), |
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63 | thePrimary.GetDefinition()->GetPDGEncoding(), |
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64 | G4lrint(theNucleus.GetZ()), |
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65 | G4lrint(theNucleus.GetN()-theNucleus.GetZ())); |
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66 | #ifdef debug_getFraction |
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67 | G4cout << "G4ProjectileDiffractiveChannel::ratio " << ratio << G4endl; |
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68 | #endif |
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69 | |
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70 | return ratio; |
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71 | } |
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72 | |
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73 | G4KineticTrackVector * G4ProjectileDiffractiveChannel::Scatter(G4Nucleus &theNucleus, |
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74 | const G4DynamicParticle & thePrimary) |
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75 | { |
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76 | |
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77 | |
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78 | G4int A=G4lrint(theNucleus.GetN()); |
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79 | G4int Z=G4lrint(theNucleus.GetZ()); |
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80 | |
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81 | G4ParticleDefinition * pDef=thePrimary.GetDefinition(); |
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82 | #ifdef debug_scatter |
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83 | G4cout << " ProjectileDiffractive: A, Z, proj-pdg" <<" "<< A <<" "<<Z |
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84 | << " "<<" " << pDef->GetParticleName()<< G4endl; |
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85 | #endif |
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86 | |
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87 | G4QHadronVector * result(0); |
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88 | G4KineticTrackVector * ktv(0); |
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89 | G4bool tryAgain; |
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90 | |
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91 | do { |
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92 | tryAgain = false; |
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93 | result=theQDiffraction->ProjFragment(pDef->GetPDGEncoding(), |
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94 | thePrimary.Get4Momentum(),Z, A-Z); |
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95 | |
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96 | if ( result && result->size() > 0 ) |
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97 | { |
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98 | ktv=new G4KineticTrackVector(); |
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99 | std::vector<G4QHadron *>::iterator i; |
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100 | #ifdef debug_scatter |
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101 | G4int count(0); |
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102 | #endif |
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103 | for (i=result->begin(); i!=result->end(); i++) |
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104 | { |
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105 | G4int pdgCode=(*i)->GetPDGCode(); |
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106 | G4ParticleDefinition * secDef(0); |
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107 | if ( pdgCode < 80000000) { // check if ion; should be 90Million, but 89Million is possible |
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108 | secDef= G4ParticleTable::GetParticleTable()->FindParticle(pdgCode); |
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109 | }else { |
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110 | G4int N = pdgCode % 1000; |
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111 | G4int Z = (pdgCode/1000) %1000; |
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112 | if ( Z < 500 && N < 500){ // protect for delta being coded as/in nucleus |
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113 | secDef = G4ParticleTable::GetParticleTable()->GetIon(Z,N+Z, 0); |
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114 | if ( ! secDef ) |
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115 | { // exceptions to the rule! |
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116 | if ( pdgCode == 90000001 ) secDef= G4Neutron::Neutron(); |
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117 | if ( pdgCode == 91000000 ) secDef= G4Lambda::Lambda(); |
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118 | } |
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119 | } |
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120 | } |
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121 | |
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122 | if ( secDef ){ |
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123 | |
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124 | G4ThreeVector pos=(*i)->GetPosition(); //GetPosition returns const & |
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125 | G4LorentzVector mom=(*i)->Get4Momentum(); |
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126 | |
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127 | G4KineticTrack * sPrim=new G4KineticTrack(secDef, |
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128 | (*i)->GetFormationTime(), pos, mom); |
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129 | ktv->push_back(sPrim); |
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130 | |
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131 | #ifdef debug_scatter |
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132 | G4cout << "G4ProjectileDiffractive sec # " << ++count << ", " |
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133 | << "ChipsPDGCode=" << pdgCode << ", " |
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134 | << secDef->GetParticleName() |
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135 | << ", time(ns) " << (*i)->GetFormationTime()/ns |
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136 | << ", pos " << pos |
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137 | << ", 4mom " << (*i)->Get4Momentum() |
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138 | << G4endl; |
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139 | #endif |
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140 | } else { |
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141 | #ifdef debug_scatter |
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142 | G4cout << "G4ProjectileDiffractiveChannel: Particle with PDG code "<< pdgCode <<" does not converted!!!"<<G4endl; |
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143 | #endif |
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144 | tryAgain=true; |
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145 | } |
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146 | } |
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147 | std::for_each(result->begin(), result->end(), DeleteQHadron()); |
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148 | delete result; |
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149 | result=0; |
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150 | } |
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151 | |
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152 | if ( result ) delete result; |
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153 | if ( tryAgain ) { // QDiffraction returned a "difficult" particle in nucleus |
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154 | std::for_each(ktv->begin(), ktv->end(), DeleteKineticTrack()); |
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155 | delete ktv; |
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156 | ktv=0; |
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157 | } |
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158 | } while ( ! ktv); |
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159 | |
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160 | return ktv; |
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161 | } |
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