1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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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 | // $Id: G4UrbanMscModel.hh,v 1.33 2008/03/10 10:39:21 vnivanch Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
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28 | // |
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29 | // ------------------------------------------------------------------- |
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30 | // |
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31 | // |
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32 | // GEANT4 Class header file |
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33 | // |
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34 | // |
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35 | // File name: G4UrbanMscModel |
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36 | // |
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37 | // Author: Laszlo Urban |
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38 | // |
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39 | // Creation date: 01.03.2001 |
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40 | // |
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41 | // Modifications: |
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42 | // |
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43 | // 27-03-03 Move model part from G4MultipleScattering (V.Ivanchenko) |
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44 | // 27-03-03 Rename (V.Ivanchenko) |
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45 | // |
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46 | // 05-08-03 angle distribution has been modified (L.Urban) |
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47 | // 26-11-03 new data member currentRange (L.Urban) |
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48 | // 01-03-04 changes in data members + signature changed in SampleCosineTheta |
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49 | // 11-03-04 changes in data members (L.Urban) |
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50 | // 23-04-04 changes in data members and in signature of SampleCosineTheta |
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51 | // (L.Urban) |
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52 | // 17-08-04 name of data member facxsi changed to factail (L.Urban) |
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53 | // 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko) |
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54 | // 15-04-05 optimize internal interface - add SampleSecondaries method (V.Ivanchenko) |
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55 | // 11-08-05 computation of lateral correlation added (L.Urban) |
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56 | // 02-10-05 nuclear size correction computation removed, the correction |
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57 | // included in the (theoretical) tabulated values (L.Urban) |
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58 | // 16-02-06 data members b and xsi have been removed (L.Urban) |
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59 | // 17-02-06 Save table of transport cross sections not mfp (V.Ivanchenko) |
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60 | // 07-03-06 Create G4UrbanMscModel and move there step limit calculation (V.Ivanchenko) |
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61 | // 10-05-06 SetMscStepLimitation at initialisation (V.Ivantchenko) |
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62 | // 11-05-06 name of data member safety changed to presafety, some new data |
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63 | // members added (frscaling1,frscaling2,tlimitminfix,nstepmax) |
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64 | // (L.Urban) |
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65 | // 13-10-06 data member factail removed, data member tkinlimit changed |
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66 | // to lambdalimit, |
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67 | // new data members tgeom,tnow,skin,skindepth,Zeff,geomlimit |
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68 | // G4double GeomLimit(const G4Track& track) changed to |
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69 | // void GeomLimit(const G4Track& track) (L.Urban) |
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70 | // 20-10-06 parameter theta0 now computed in the (public) |
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71 | // function ComputeTheta0, |
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72 | // single scattering modified allowing not small |
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73 | // angles as well (L.Urban) |
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74 | // 31-01-07 code cleaning (L.Urban) |
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75 | // 06-02-07 Move SetMscStepLimitation method into the source (VI) |
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76 | // 15-02-07 new data member : smallstep (L.Urban) |
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77 | // 10-04-07 remove navigator, smallstep, tnow (V.Ivanchenko) |
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78 | // |
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79 | // |
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80 | // Class Description: |
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81 | // |
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82 | // Implementation of the model of multiple scattering based on |
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83 | // H.W.Lewis Phys Rev 78 (1950) 526 and L.Urban model |
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84 | |
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85 | // ------------------------------------------------------------------- |
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86 | // |
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87 | |
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88 | #ifndef G4UrbanMscModel_h |
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89 | #define G4UrbanMscModel_h 1 |
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90 | |
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91 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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92 | |
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93 | #include "G4VMscModel.hh" |
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94 | #include "G4PhysicsTable.hh" |
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95 | #include "G4MscStepLimitType.hh" |
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96 | |
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97 | class G4ParticleChangeForMSC; |
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98 | class G4SafetyHelper; |
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99 | class G4LossTableManager; |
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100 | |
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101 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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102 | |
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103 | class G4UrbanMscModel : public G4VMscModel |
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104 | { |
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105 | |
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106 | public: |
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107 | |
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108 | G4UrbanMscModel(const G4String& nam = "UrbanMscUni"); |
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109 | |
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110 | virtual ~G4UrbanMscModel(); |
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111 | |
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112 | void Initialise(const G4ParticleDefinition*, const G4DataVector&); |
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113 | |
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114 | G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition* particle, |
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115 | G4double KineticEnergy, |
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116 | G4double AtomicNumber, |
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117 | G4double AtomicWeight=0., |
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118 | G4double cut =0., |
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119 | G4double emax=DBL_MAX); |
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120 | |
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121 | void SampleSecondaries(std::vector<G4DynamicParticle*>*, |
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122 | const G4MaterialCutsCouple*, |
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123 | const G4DynamicParticle*, |
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124 | G4double, |
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125 | G4double); |
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126 | |
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127 | void SampleScattering(const G4DynamicParticle*, |
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128 | G4double safety); |
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129 | |
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130 | G4double ComputeTruePathLengthLimit(const G4Track& track, |
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131 | G4PhysicsTable* theLambdaTable, |
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132 | G4double currentMinimalStep); |
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133 | |
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134 | G4double ComputeGeomPathLength(G4double truePathLength); |
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135 | |
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136 | G4double ComputeTrueStepLength(G4double geomStepLength); |
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137 | |
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138 | G4double ComputeTheta0(G4double truePathLength, |
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139 | G4double KineticEnergy); |
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140 | |
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141 | private: |
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142 | |
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143 | G4double SampleCosineTheta(G4double trueStepLength, G4double KineticEnergy); |
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144 | |
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145 | G4double SampleDisplacement(); |
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146 | |
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147 | G4double LatCorrelation(); |
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148 | |
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149 | void GeomLimit(const G4Track& track); |
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150 | |
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151 | inline G4double GetLambda(G4double kinEnergy); |
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152 | |
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153 | inline void SetParticle(const G4ParticleDefinition*); |
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154 | |
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155 | // hide assignment operator |
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156 | G4UrbanMscModel & operator=(const G4UrbanMscModel &right); |
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157 | G4UrbanMscModel(const G4UrbanMscModel&); |
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158 | |
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159 | const G4ParticleDefinition* particle; |
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160 | G4ParticleChangeForMSC* fParticleChange; |
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161 | |
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162 | G4SafetyHelper* safetyHelper; |
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163 | G4PhysicsTable* theLambdaTable; |
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164 | const G4MaterialCutsCouple* couple; |
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165 | G4LossTableManager* theManager; |
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166 | |
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167 | G4double mass; |
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168 | G4double charge; |
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169 | |
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170 | G4double masslimite,masslimitmu; |
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171 | |
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172 | G4double taubig; |
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173 | G4double tausmall; |
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174 | G4double taulim; |
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175 | G4double currentTau; |
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176 | G4double frscaling1,frscaling2; |
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177 | G4double tlimit; |
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178 | G4double tlimitmin; |
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179 | G4double tlimitminfix; |
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180 | |
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181 | G4double nstepmax; |
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182 | G4double geombig; |
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183 | G4double geommin; |
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184 | G4double geomlimit; |
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185 | G4double skindepth; |
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186 | G4double smallstep; |
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187 | |
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188 | G4double presafety; |
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189 | |
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190 | G4double lambda0; |
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191 | G4double lambdaeff; |
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192 | G4double tPathLength; |
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193 | G4double zPathLength; |
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194 | G4double par1,par2,par3; |
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195 | |
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196 | G4double stepmin; |
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197 | |
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198 | G4double currentKinEnergy; |
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199 | G4double currentRange; |
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200 | G4double currentRadLength; |
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201 | |
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202 | G4double Zeff; |
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203 | |
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204 | G4int currentMaterialIndex; |
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205 | |
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206 | G4bool isInitialized; |
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207 | G4bool inside; |
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208 | G4bool insideskin; |
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209 | |
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210 | }; |
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211 | |
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212 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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213 | |
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214 | inline |
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215 | G4double G4UrbanMscModel::GetLambda(G4double e) |
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216 | { |
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217 | G4double x; |
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218 | if(theLambdaTable) { |
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219 | G4bool b; |
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220 | x = ((*theLambdaTable)[currentMaterialIndex])->GetValue(e, b); |
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221 | } else { |
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222 | x = CrossSection(couple,particle,e); |
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223 | } |
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224 | if(x > DBL_MIN) x = 1./x; |
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225 | else x = DBL_MAX; |
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226 | return x; |
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227 | } |
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228 | |
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229 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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230 | |
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231 | inline |
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232 | void G4UrbanMscModel::SetParticle(const G4ParticleDefinition* p) |
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233 | { |
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234 | if (p != particle) { |
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235 | particle = p; |
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236 | mass = p->GetPDGMass(); |
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237 | charge = p->GetPDGCharge()/eplus; |
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238 | } |
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239 | } |
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240 | |
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241 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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242 | |
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243 | #endif |
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244 | |
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