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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4IonisParamMat.hh,v 1.17 2009/11/18 17:42:23 gcosmo Exp $ |
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28 | // GEANT4 tag $Name: materials-V09-02-18 $ |
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29 | // |
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30 | |
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31 | // class description |
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32 | // |
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33 | // The class contains few (physical) quantities related to the Ionisation |
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34 | // process, for a material defined by its pointer G4Material* |
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35 | // |
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36 | |
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37 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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38 | |
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39 | // 09-07-98: data moved from G4Material (mma) |
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40 | // 09-03-01: copy constructor and assignement operator in public (mma) |
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41 | // 28-10-02: add setMeanExcitationEnergy (V.Ivanchenko) |
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42 | // 27-09-07: add computation of parameters for ions (V.Ivanchenko) |
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43 | // 04-03-08: add fBirks constant (mma) |
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44 | |
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45 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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46 | |
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47 | #ifndef G4IonisParamMat_HH |
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48 | #define G4IonisParamMat_HH |
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49 | |
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50 | #include "G4ios.hh" |
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51 | #include "globals.hh" |
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52 | |
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53 | class G4Material; // forward declaration |
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54 | class G4DensityEffectData; |
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55 | |
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56 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... ....oooOO0OOooo.... |
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57 | |
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58 | class G4IonisParamMat // with description |
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59 | { |
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60 | public: |
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61 | |
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62 | G4IonisParamMat(G4Material*); |
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63 | virtual ~G4IonisParamMat(); |
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64 | |
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65 | // |
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66 | // retrieval methods |
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67 | // |
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68 | |
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69 | // parameters for mean energy loss calculation: |
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70 | G4double GetMeanExcitationEnergy() const {return fMeanExcitationEnergy;}; |
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71 | void SetMeanExcitationEnergy(G4double value); |
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72 | G4double FindMeanExcitationEnergy(const G4String& chFormula); |
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73 | G4double GetLogMeanExcEnergy() const {return fLogMeanExcEnergy;}; |
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74 | G4double* GetShellCorrectionVector() const {return fShellCorrectionVector;}; |
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75 | G4double GetTaul() const {return fTaul;}; |
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76 | |
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77 | // parameters of the density correction: |
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78 | G4double GetPlasmaEnergy() const {return fPlasmaEnergy;}; |
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79 | G4double GetAdjustmentFactor() const {return fAdjustmentFactor;}; |
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80 | G4double GetCdensity() const {return fCdensity;}; |
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81 | G4double GetMdensity() const {return fMdensity;}; |
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82 | G4double GetAdensity() const {return fAdensity;}; |
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83 | G4double GetX0density() const {return fX0density;}; |
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84 | G4double GetX1density() const {return fX1density;}; |
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85 | G4double GetD0density() const {return fD0density;}; |
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86 | |
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87 | // compute density correction as a function of the kinematic variable |
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88 | // x = log10(beta*gamma) |
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89 | inline G4double DensityCorrection(G4double x); |
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90 | static G4DensityEffectData* GetDensityEffectData(); |
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91 | |
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92 | // parameters of the energy loss fluctuation model: |
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93 | G4double GetF1fluct() const {return fF1fluct;}; |
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94 | G4double GetF2fluct() const {return fF2fluct;}; |
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95 | G4double GetEnergy1fluct() const {return fEnergy1fluct;}; |
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96 | G4double GetLogEnergy1fluct() const {return fLogEnergy1fluct;}; |
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97 | G4double GetEnergy2fluct() const {return fEnergy2fluct;}; |
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98 | G4double GetLogEnergy2fluct() const {return fLogEnergy2fluct;}; |
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99 | G4double GetEnergy0fluct() const {return fEnergy0fluct;}; |
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100 | G4double GetRateionexcfluct() const {return fRateionexcfluct;}; |
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101 | |
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102 | // parameters for ion corrections computations |
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103 | G4double GetZeffective() const {return fZeff;}; |
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104 | G4double GetFermiEnergy() const {return fFermiEnergy;}; |
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105 | G4double GetLFactor() const {return fLfactor;}; |
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106 | |
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107 | // parameters for Birks attenuation: |
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108 | void SetBirksConstant(G4double value) {fBirks = value;}; |
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109 | G4double GetBirksConstant() const {return fBirks;}; |
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110 | |
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111 | // parameters for average energy per ion |
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112 | void SetMeanEnergyPerIonPair(G4double value) {fMeanEnergyPerIon = value;}; |
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113 | G4double GetMeanEnergyPerIonPair() const {return fMeanEnergyPerIon;}; |
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114 | |
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115 | public: // without description |
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116 | |
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117 | G4IonisParamMat(const G4IonisParamMat&); |
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118 | const G4IonisParamMat& operator=(const G4IonisParamMat&); |
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119 | G4int operator==(const G4IonisParamMat&) const; |
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120 | G4int operator!=(const G4IonisParamMat&) const; |
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121 | |
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122 | G4IonisParamMat(__void__&); |
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123 | // Fake default constructor for usage restricted to direct object |
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124 | // persistency for clients requiring preallocation of memory for |
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125 | // persistifiable objects. |
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126 | |
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127 | private: |
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128 | |
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129 | // Compute mean parameters : ExcitationEnergy,Shell corretion vector ... |
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130 | void ComputeMeanParameters(); |
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131 | |
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132 | // Compute parameters for the density effect |
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133 | void ComputeDensityEffect(); |
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134 | |
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135 | // Compute parameters for the energy fluctuation model |
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136 | void ComputeFluctModel(); |
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137 | |
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138 | // Compute parameters for ion parameterizations |
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139 | void ComputeIonParameters(); |
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140 | |
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141 | private: |
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142 | |
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143 | // |
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144 | // data members |
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145 | // |
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146 | G4Material* fMaterial; // this material |
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147 | |
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148 | // parameters for mean energy loss calculation |
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149 | G4double fMeanExcitationEnergy; // |
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150 | G4double fLogMeanExcEnergy; // |
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151 | G4double* fShellCorrectionVector; // shell correction coefficients |
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152 | G4double fTaul; // lower limit of Bethe-Bloch formula |
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153 | |
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154 | // parameters of the density correction |
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155 | G4double fCdensity; // mat.constant |
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156 | G4double fMdensity; // exponent |
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157 | G4double fAdensity; // |
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158 | G4double fX0density; // |
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159 | G4double fX1density; // |
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160 | G4double fD0density; |
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161 | |
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162 | G4double fPlasmaEnergy; |
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163 | G4double fAdjustmentFactor; |
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164 | |
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165 | // parameters of the energy loss fluctuation model |
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166 | G4double fF1fluct; |
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167 | G4double fF2fluct; |
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168 | G4double fEnergy1fluct; |
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169 | G4double fLogEnergy1fluct; |
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170 | G4double fEnergy2fluct; |
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171 | G4double fLogEnergy2fluct; |
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172 | G4double fEnergy0fluct; |
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173 | G4double fRateionexcfluct; |
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174 | |
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175 | // parameters for ion corrections computations |
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176 | G4double fZeff; |
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177 | G4double fFermiEnergy; |
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178 | G4double fLfactor; |
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179 | |
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180 | // parameter for Birks attenuation |
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181 | G4double fBirks; |
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182 | // average energy per ion pair |
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183 | G4double fMeanEnergyPerIon; |
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184 | |
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185 | // static data created only once |
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186 | static G4DensityEffectData* fDensityData; |
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187 | }; |
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188 | |
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189 | // x = log10(beta*gamma) |
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190 | inline G4double G4IonisParamMat::DensityCorrection(G4double x) |
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191 | { |
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192 | static const G4double twoln10 = 2.*std::log(10.); |
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193 | G4double y = 0.0; |
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194 | if(x < fX0density) { |
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195 | if(fD0density > 0.0) { y = fD0density*std::pow(10.,2*(x - fX0density)); } |
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196 | } else if(x >= fX1density) { y = twoln10*x - fCdensity; } |
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197 | else {y = twoln10*x - fCdensity + fAdensity*std::pow(fX1density - x, fMdensity);} |
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198 | return y; |
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199 | } |
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200 | |
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201 | #endif |
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