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 | // File name: G4KaonMinusAbsorptionAtRest.hh |
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27 | // |
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28 | // Author: Christian V"olcker (Christian.Volcker@cern.ch), |
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29 | // |
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30 | // Creation date: 10. November 1997 |
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31 | // |
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32 | // ------------------------------------------------------------------- |
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33 | |
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34 | #ifndef G4KaonMinusAbsorptionAtRest_h |
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35 | #define G4KaonMinusAbsorptionAtRest_h 1 |
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36 | |
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37 | // Class Description: |
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38 | // |
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39 | // Process for nuclear absorption of K- at rest. |
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40 | // To be used in your physics list in case you need this physics. |
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41 | |
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42 | #include "globals.hh" |
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43 | #include "Randomize.hh" |
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44 | #include "G4VRestProcess.hh" |
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45 | #include "G4ParticleTypes.hh" |
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46 | #include "G4Nucleus.hh" |
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47 | #include "G4DynamicParticle.hh" |
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48 | #include "G4DynamicParticleVector.hh" |
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49 | #include "G4NucleiPropertiesTable.hh" |
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50 | //#include "G4String.hh" |
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51 | |
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52 | |
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53 | // ********************************************************* |
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54 | class G4KaonMinusAbsorptionAtRest : public G4VRestProcess |
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55 | // ********************************************************* |
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56 | { |
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57 | private: |
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58 | // hide assignment operator as private |
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59 | G4KaonMinusAbsorptionAtRest& operator=(const G4KaonMinusAbsorptionAtRest &right); |
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60 | G4KaonMinusAbsorptionAtRest(const G4KaonMinusAbsorptionAtRest& ); |
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61 | public: |
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62 | G4KaonMinusAbsorptionAtRest(const G4String& processName ="KaonMinusAbsorptionAtRest", |
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63 | G4ProcessType aType = fHadronic ); |
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64 | ~G4KaonMinusAbsorptionAtRest(); |
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65 | |
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66 | //override methods... |
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67 | public: |
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68 | G4bool IsApplicable(const G4ParticleDefinition& particle) { |
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69 | return( particle == *(G4KaonMinus::KaonMinus()) ); |
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70 | } |
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71 | |
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72 | // the main method ... |
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73 | G4VParticleChange* AtRestDoIt(const G4Track& aTrack, const G4Step& aStep); |
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74 | |
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75 | protected: // why?? might be private.... |
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76 | // zero mean lifetime |
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77 | G4double GetMeanLifeTime(const G4Track& aTrack, |
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78 | G4ForceCondition* ) |
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79 | { |
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80 | G4double result = 0; |
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81 | if(aTrack.GetMaterial()->GetNumberOfElements() == 1) |
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82 | if(aTrack.GetMaterial()->GetZ()<1.5) result = DBL_MAX; |
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83 | return result; |
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84 | } |
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85 | |
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86 | private: |
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87 | // returns proton or neutron with fermi-momentum |
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88 | G4DynamicParticle GetAbsorbingNucleon(); |
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89 | |
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90 | // returns proton or neutron particle definition; |
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91 | G4ParticleDefinition* SelectAbsorbingNucleon(); |
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92 | |
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93 | // provides the neutron halo factor for absorption on nucleus surface. |
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94 | // in the G4Nucleus |
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95 | G4double NeutronHaloFactor(G4double Z, G4double N); |
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96 | |
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97 | // creates the reaction products |
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98 | G4DynamicParticleVector* KaonNucleonReaction(); |
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99 | |
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100 | // secondary pion absorption in parent nucleus |
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101 | // if TRUE, then add excitation energy to the Nucleus |
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102 | G4bool AbsorbPionByNucleus(G4DynamicParticle* aPion); |
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103 | |
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104 | // secondary Sigma-Lambda conversion |
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105 | // if conversion Done, then add excitation energy to the Nucleus |
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106 | G4DynamicParticle *SigmaLambdaConversion(G4DynamicParticle* aSigma); |
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107 | |
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108 | // instance variables ... |
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109 | private: |
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110 | // pointer to current stopped hadron |
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111 | const G4DynamicParticle *stoppedHadron; |
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112 | |
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113 | // pointer to current target nucleus |
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114 | G4Nucleus* nucleus; |
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115 | |
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116 | // some constant parameters |
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117 | |
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118 | G4double pionAbsorptionRate; |
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119 | |
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120 | // primary production rates ( for absorption on Carbon) |
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121 | |
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122 | G4double rateLambdaZeroPiZero; |
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123 | G4double rateSigmaMinusPiPlus; |
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124 | G4double rateSigmaPlusPiMinus; |
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125 | G4double rateSigmaZeroPiZero; |
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126 | |
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127 | G4double rateLambdaZeroPiMinus; |
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128 | G4double rateSigmaZeroPiMinus; |
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129 | G4double rateSigmaMinusPiZero; |
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130 | |
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131 | |
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132 | // Sigma Lambda Conversion rates |
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133 | // for sigma- p -> lambda n |
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134 | // sigma+ n -> lambda p |
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135 | // sigma- n -> lambda |
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136 | |
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137 | G4double sigmaPlusLambdaConversionRate; |
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138 | G4double sigmaMinusLambdaConversionRate; |
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139 | G4double sigmaZeroLambdaConversionRate; |
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140 | |
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141 | }; |
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142 | |
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143 | #endif |
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144 | |
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