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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15 | // * use. Please see the license in the file LICENSE and URL above * |
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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 | // $Id: G4CascadeColliderBase.cc,v 1.5 2010/09/26 04:06:03 mkelsey Exp $ |
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26 | // Geant4 tag: $Name: hadr-casc-V09-03-85 $ |
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27 | // |
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28 | // 20100714 M. Kelsey -- Move functionality from G4VCascadeCollider, and |
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29 | // provide conservation-checking here, with wrapper function |
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30 | // and control flag. |
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31 | // 20100721 M. Kelsey -- Use G4CASCADE_CHECK_ECONS to set default control |
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32 | // flag for validations. |
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33 | // 20100923 M. Kelsey -- Migrate to integer A and Z |
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34 | // 20100925 M. Kelsey -- Add explosion() interfaces for G4Fragment and for |
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35 | // (A,Z,E). Move implementation to latter. Add Z==0 condition. |
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36 | |
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37 | #include "G4CascadeColliderBase.hh" |
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38 | #include "G4CascadeCheckBalance.hh" |
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39 | #include "G4CollisionOutput.hh" |
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40 | #include "G4Fragment.hh" |
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41 | #include "G4InteractionCase.hh" |
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42 | #include "G4InuclElementaryParticle.hh" |
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43 | #include "G4InuclNuclei.hh" |
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44 | #include "G4InuclSpecialFunctions.hh" |
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45 | #include "G4ios.hh" |
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46 | |
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47 | using namespace G4InuclSpecialFunctions; |
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48 | |
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49 | |
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50 | // Constructor and destructor |
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51 | |
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52 | G4CascadeColliderBase::G4CascadeColliderBase(const char* name, G4int verbose) |
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53 | : G4VCascadeCollider(name, verbose), |
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54 | #ifdef G4CASCADE_CHECK_ECONS |
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55 | doConservationChecks(true), |
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56 | #else |
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57 | doConservationChecks(false), |
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58 | #endif |
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59 | balance(new G4CascadeCheckBalance(0.001, 0.001, name)) {} |
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60 | |
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61 | G4CascadeColliderBase::~G4CascadeColliderBase() { |
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62 | delete balance; |
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63 | } |
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64 | |
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65 | |
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66 | // Both bullet and target must be hadrons or leptons for this to work |
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67 | |
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68 | G4bool G4CascadeColliderBase::useEPCollider(G4InuclParticle* bullet, |
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69 | G4InuclParticle* target) const { |
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70 | return (dynamic_cast<G4InuclElementaryParticle*>(bullet) && |
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71 | dynamic_cast<G4InuclElementaryParticle*>(target)); |
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72 | } |
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73 | |
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74 | |
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75 | // Decide wether nuclear fragment is candidate for G4BigBanger |
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76 | |
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77 | G4bool G4CascadeColliderBase::explosion(G4InuclNuclei* target) const { |
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78 | return target && explosion(target->getA(), target->getZ(), |
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79 | target->getExitationEnergy()); // in MeV |
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80 | } |
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81 | |
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82 | G4bool G4CascadeColliderBase::explosion(G4Fragment* fragment) const { |
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83 | return fragment && explosion(fragment->GetA_asInt(), fragment->GetZ_asInt(), |
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84 | fragment->GetExcitationEnergy()); // in MeV |
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85 | } |
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86 | |
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87 | G4bool |
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88 | G4CascadeColliderBase::explosion(G4int A, G4int Z, |
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89 | G4double excitation) const { |
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90 | if (verboseLevel) G4cout << " >>> " << theName << "::explosion ?" << G4endl; |
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91 | |
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92 | const G4int a_cut = 20; |
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93 | const G4double be_cut = 3.0; |
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94 | |
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95 | // Neutron balls, or small fragments with high excitations can explode |
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96 | return ((A <= a_cut || Z==0) && |
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97 | (excitation >= be_cut * bindingEnergy(A,Z)) |
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98 | ); |
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99 | } |
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100 | |
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101 | |
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102 | // Decide whether bullet-target interaction is candidate for cascade |
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103 | |
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104 | G4bool |
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105 | G4CascadeColliderBase::inelasticInteractionPossible(G4InuclParticle* bullet, |
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106 | G4InuclParticle* target, |
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107 | G4double ekin) const { |
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108 | if (verboseLevel) { |
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109 | G4cout << " >>> " << theName << "::inelasticInteractionPossible" << G4endl; |
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110 | } |
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111 | |
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112 | // If hadron-hadron collision, defer to ElementaryParticleCollider |
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113 | if (useEPCollider(bullet, target)) return true; |
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114 | |
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115 | // See which one of the two (or both) is a nucleus, get properties |
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116 | // FIXME: Should set a = baryon() for both, but that's not in base |
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117 | G4InuclNuclei* nuclei_bullet = dynamic_cast<G4InuclNuclei*>(bullet); |
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118 | G4double ab = nuclei_bullet ? nuclei_bullet->getA() : 1; // FIXME |
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119 | G4double zb = nuclei_bullet ? nuclei_bullet->getZ() : bullet->getCharge(); |
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120 | |
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121 | G4InuclNuclei* nuclei_target = dynamic_cast<G4InuclNuclei*>(target); |
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122 | G4double at = nuclei_target ? nuclei_target->getA() : 1; // FIXME |
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123 | G4double zt = nuclei_target ? nuclei_target->getZ() : target->getCharge(); |
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124 | |
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125 | // VCOL (Coulomb barrier) used for testing if elastic collision necessary |
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126 | const G4double coeff = 0.001 * 1.2; |
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127 | |
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128 | G4double VCOL = coeff * zt * zb / (G4cbrt(at) + G4cbrt(ab)); |
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129 | |
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130 | G4bool possible = true; // Force inelastic; should be (ekin >= VCOL) |
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131 | |
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132 | if (verboseLevel > 3) { |
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133 | G4cout << " VCOL: " << VCOL << " ekin: " << ekin << " inelastic possible: " |
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134 | << possible << G4endl; |
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135 | } |
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136 | |
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137 | return possible; |
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138 | } |
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139 | |
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140 | |
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141 | // Validate output for energy, momentum conservation, etc. |
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142 | |
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143 | G4bool G4CascadeColliderBase::validateOutput(G4InuclParticle* bullet, |
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144 | G4InuclParticle* target, |
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145 | G4CollisionOutput& output) { |
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146 | if (!doConservationChecks) return true; // Skip checks if requested |
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147 | |
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148 | if (verboseLevel > 1) |
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149 | G4cout << " >>> " << theName << "::validateOutput" << G4endl; |
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150 | |
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151 | // Show final state particles |
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152 | if (verboseLevel > 2) output.printCollisionOutput(); |
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153 | |
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154 | balance->setVerboseLevel(verboseLevel); |
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155 | balance->collide(bullet, target, output); |
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156 | return balance->okay(); // Returns false if violations |
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157 | } |
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158 | |
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159 | G4bool G4CascadeColliderBase::validateOutput(G4InuclParticle* bullet, |
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160 | G4InuclParticle* target, |
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161 | const std::vector<G4InuclElementaryParticle>& particles) { |
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162 | if (!doConservationChecks) return true; // Skip checks if requested |
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163 | |
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164 | if (verboseLevel > 1) |
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165 | G4cout << " >>> " << theName << "::validateOutput" << G4endl; |
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166 | |
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167 | balance->setVerboseLevel(verboseLevel); |
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168 | balance->collide(bullet, target, particles); |
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169 | return balance->okay(); // Returns false if violations |
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170 | } |
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171 | |
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172 | G4bool G4CascadeColliderBase::validateOutput(G4InuclParticle* bullet, |
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173 | G4InuclParticle* target, |
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174 | const std::vector<G4InuclNuclei>& fragments) { |
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175 | if (!doConservationChecks) return true; // Skip checks if requested |
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176 | |
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177 | if (verboseLevel > 1) |
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178 | G4cout << " >>> " << theName << "::validateOutput" << G4endl; |
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179 | |
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180 | balance->setVerboseLevel(verboseLevel); |
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181 | balance->collide(bullet, target, fragments); |
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182 | return balance->okay(); // Returns false if violations |
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183 | } |
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