[822] | 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 | // |
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[1315] | 27 | // $Id: G4IonisParamMat.hh,v 1.18 2010/05/10 10:44:39 vnivanch Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-04-beta-cand-01 $ |
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[822] | 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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[850] | 43 | // 04-03-08: add fBirks constant (mma) |
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[822] | 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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[1196] | 54 | class G4DensityEffectData; |
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[822] | 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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[1196] | 62 | G4IonisParamMat(G4Material*); |
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| 63 | virtual ~G4IonisParamMat(); |
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[822] | 64 | |
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[1196] | 65 | // |
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| 66 | // retrieval methods |
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| 67 | // |
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[822] | 68 | |
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[1196] | 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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[822] | 76 | |
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[1196] | 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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[822] | 91 | |
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[1196] | 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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[822] | 101 | |
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[1196] | 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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[1315] | 106 | G4double GetInvA23() const {return fInvA23;}; |
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[850] | 107 | |
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[1196] | 108 | // parameters for Birks attenuation: |
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| 109 | void SetBirksConstant(G4double value) {fBirks = value;}; |
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| 110 | G4double GetBirksConstant() const {return fBirks;}; |
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[822] | 111 | |
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[1196] | 112 | // parameters for average energy per ion |
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| 113 | void SetMeanEnergyPerIonPair(G4double value) {fMeanEnergyPerIon = value;}; |
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| 114 | G4double GetMeanEnergyPerIonPair() const {return fMeanEnergyPerIon;}; |
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[850] | 115 | |
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[822] | 116 | public: // without description |
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| 117 | |
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[1196] | 118 | G4IonisParamMat(const G4IonisParamMat&); |
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| 119 | const G4IonisParamMat& operator=(const G4IonisParamMat&); |
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| 120 | G4int operator==(const G4IonisParamMat&) const; |
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| 121 | G4int operator!=(const G4IonisParamMat&) const; |
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[822] | 122 | |
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[1196] | 123 | G4IonisParamMat(__void__&); |
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| 124 | // Fake default constructor for usage restricted to direct object |
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| 125 | // persistency for clients requiring preallocation of memory for |
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| 126 | // persistifiable objects. |
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[822] | 127 | |
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| 128 | private: |
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| 129 | |
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[1196] | 130 | // Compute mean parameters : ExcitationEnergy,Shell corretion vector ... |
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| 131 | void ComputeMeanParameters(); |
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[822] | 132 | |
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[1196] | 133 | // Compute parameters for the density effect |
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| 134 | void ComputeDensityEffect(); |
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[822] | 135 | |
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[1196] | 136 | // Compute parameters for the energy fluctuation model |
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| 137 | void ComputeFluctModel(); |
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[822] | 138 | |
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[1196] | 139 | // Compute parameters for ion parameterizations |
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| 140 | void ComputeIonParameters(); |
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[822] | 141 | |
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| 142 | private: |
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| 143 | |
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| 144 | // |
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| 145 | // data members |
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| 146 | // |
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[1196] | 147 | G4Material* fMaterial; // this material |
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[822] | 148 | |
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[1196] | 149 | // parameters for mean energy loss calculation |
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| 150 | G4double fMeanExcitationEnergy; // |
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| 151 | G4double fLogMeanExcEnergy; // |
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| 152 | G4double* fShellCorrectionVector; // shell correction coefficients |
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| 153 | G4double fTaul; // lower limit of Bethe-Bloch formula |
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[822] | 154 | |
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[1196] | 155 | // parameters of the density correction |
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| 156 | G4double fCdensity; // mat.constant |
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| 157 | G4double fMdensity; // exponent |
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| 158 | G4double fAdensity; // |
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| 159 | G4double fX0density; // |
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| 160 | G4double fX1density; // |
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| 161 | G4double fD0density; |
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[822] | 162 | |
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[1196] | 163 | G4double fPlasmaEnergy; |
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| 164 | G4double fAdjustmentFactor; |
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[822] | 165 | |
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[1196] | 166 | // parameters of the energy loss fluctuation model |
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| 167 | G4double fF1fluct; |
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| 168 | G4double fF2fluct; |
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| 169 | G4double fEnergy1fluct; |
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| 170 | G4double fLogEnergy1fluct; |
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| 171 | G4double fEnergy2fluct; |
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| 172 | G4double fLogEnergy2fluct; |
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| 173 | G4double fEnergy0fluct; |
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| 174 | G4double fRateionexcfluct; |
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| 175 | |
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| 176 | // parameters for ion corrections computations |
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| 177 | G4double fZeff; |
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| 178 | G4double fFermiEnergy; |
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| 179 | G4double fLfactor; |
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[1315] | 180 | G4double fInvA23; |
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[850] | 181 | |
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[1196] | 182 | // parameter for Birks attenuation |
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| 183 | G4double fBirks; |
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| 184 | // average energy per ion pair |
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| 185 | G4double fMeanEnergyPerIon; |
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| 186 | |
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| 187 | // static data created only once |
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| 188 | static G4DensityEffectData* fDensityData; |
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[822] | 189 | }; |
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| 190 | |
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[1196] | 191 | // x = log10(beta*gamma) |
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| 192 | inline G4double G4IonisParamMat::DensityCorrection(G4double x) |
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| 193 | { |
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| 194 | static const G4double twoln10 = 2.*std::log(10.); |
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| 195 | G4double y = 0.0; |
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| 196 | if(x < fX0density) { |
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| 197 | if(fD0density > 0.0) { y = fD0density*std::pow(10.,2*(x - fX0density)); } |
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| 198 | } else if(x >= fX1density) { y = twoln10*x - fCdensity; } |
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| 199 | else {y = twoln10*x - fCdensity + fAdensity*std::pow(fX1density - x, fMdensity);} |
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| 200 | return y; |
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| 201 | } |
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| 202 | |
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[822] | 203 | #endif |
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