[1058] | 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 | // $Id: G4GoudsmitSaundersonMscModel.hh,v 1.1 2009/03/05 18:48:30 vnivanch Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-03-beta-cand-01 $ |
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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: G4GoudsmitSaundersonMscModel |
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| 36 | // |
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| 37 | // Author: Omrane Kadri |
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| 38 | // |
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| 39 | // Creation date: 20.02.2009 |
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| 40 | // |
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| 41 | // Modifications: |
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| 42 | // 04.03.2009 V.Ivanchenko cleanup and format according to Geant4 EM style |
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| 43 | // |
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| 44 | // Class description: |
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| 45 | // |
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| 46 | // Multiple scattering model using classical Goudsmit-Saunderson model |
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| 47 | // |
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| 48 | //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ |
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| 49 | //REFERENCES: |
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| 50 | //Ref.1:E. Benedito et al.,"Mixed simulation ... cross-sections", NIMB 174 (2001) pp 91-110; |
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| 51 | //Ref.2:I. Kawrakow et al.,"On the condensed ... transport",NIMB 142 (1998) pp 253-280; |
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| 52 | //Ref.3:I. Kawrakow et al.,"On the representation ... calculations",NIMB 134 (1998) pp 325-336; |
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| 53 | //Ref.4:I. Kawrakow et al.,"The EGSnrc code ... Transport",NRCC Report PIRS-701, Sept. 21, 2006; |
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| 54 | //Ref.5:F. Salvat et al.,"ELSEPA--Dirac partial ...molecules", Comp. Phys. Comm. 165 (2005) pp 157-190; |
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| 55 | //Ref.6:G4UrbanMscModel G4_v9.1Ref09; |
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| 56 | //Ref.7:G4eCoulombScatteringModel G4_v9.1Ref09. |
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| 57 | //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ |
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| 58 | |
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| 59 | #ifndef G4GoudsmitSaundersonMscModel_h |
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| 60 | #define G4GoudsmitSaundersonMscModel_h 1 |
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| 61 | |
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| 62 | #include "G4VMscModel.hh" |
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| 63 | #include "G4PhysicsTable.hh" |
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| 64 | #include "globals.hh" |
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| 65 | #include "G4DataInterpolation.hh" |
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| 66 | |
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| 67 | class G4DataVector; |
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| 68 | class G4ParticleChangeForMSC; |
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| 69 | class G4LossTableManager; |
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| 70 | class G4GoudsmitSaundersonTable; |
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| 71 | class G4PhysicsTable; |
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| 72 | |
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| 73 | class G4GoudsmitSaundersonMscModel : public G4VMscModel |
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| 74 | { |
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| 75 | public: |
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| 76 | |
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| 77 | G4GoudsmitSaundersonMscModel(const G4String& nam = "GoudsmitSaunderson"); |
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| 78 | |
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| 79 | virtual ~G4GoudsmitSaundersonMscModel(); |
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| 80 | |
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| 81 | virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&); |
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| 82 | |
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| 83 | virtual G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition* particle, |
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| 84 | G4double KineticEnergy, |
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| 85 | G4double AtomicNumber, G4double, |
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| 86 | G4double, G4double); |
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| 87 | |
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| 88 | virtual void SampleScattering(const G4DynamicParticle* , |
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| 89 | G4double ); |
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| 90 | |
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| 91 | virtual G4double ComputeTruePathLengthLimit( |
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| 92 | const G4Track& track, |
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| 93 | G4PhysicsTable* theLambdaTable, |
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| 94 | G4double currentMinimalStep); |
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| 95 | |
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| 96 | virtual G4double ComputeGeomPathLength(G4double truePathLength); |
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| 97 | |
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| 98 | virtual G4double ComputeTrueStepLength(G4double geomStepLength); |
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| 99 | |
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| 100 | private: |
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| 101 | void SampleCosineTheta(G4double,G4double,G4double &,G4double &); |
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| 102 | |
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| 103 | void CalculateIntegrals(const G4ParticleDefinition* ,G4double,G4double, |
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| 104 | G4double&,G4double&); |
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| 105 | |
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| 106 | void LoadELSEPAXSections(); |
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| 107 | |
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| 108 | inline void SetParticle(const G4ParticleDefinition* p); |
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| 109 | |
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| 110 | inline G4double GetLambda(G4double); |
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| 111 | |
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| 112 | // hide assignment operator |
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| 113 | G4GoudsmitSaundersonMscModel & operator=(const G4GoudsmitSaundersonMscModel &right); |
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| 114 | G4GoudsmitSaundersonMscModel(const G4GoudsmitSaundersonMscModel&); |
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| 115 | |
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| 116 | G4double lowKEnergy; |
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| 117 | G4double highKEnergy; |
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| 118 | G4double currentKinEnergy; |
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| 119 | G4double currentRange; |
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| 120 | |
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| 121 | G4double smallstep,tlimitminfix,skindepth; |
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| 122 | G4double fr,rangeinit,masslimite,tgeom; |
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| 123 | G4double par1,par2,par3,zPathLength,truePathLength; |
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| 124 | G4double tausmall,taulim,tlimit,tlimitmin,geommin,geombig; |
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| 125 | G4double charge,lambdalimit; |
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| 126 | G4double tPathLength,stepmin ; |
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| 127 | G4double lambda1,lambda11; |
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| 128 | G4double mass; |
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| 129 | G4double lambda0; |
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| 130 | G4int currentMaterialIndex; |
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| 131 | |
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| 132 | G4bool inside; |
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| 133 | G4bool insideskin; |
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| 134 | G4bool isInitialized; |
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| 135 | |
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| 136 | G4PhysicsTable* theLambdaTable; |
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| 137 | G4GoudsmitSaundersonTable* GSTable; |
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| 138 | G4LossTableManager* theManager; |
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| 139 | const G4ParticleDefinition* particle; |
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| 140 | G4ParticleChangeForMSC* fParticleChange; |
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| 141 | G4DataInterpolation* MyValue; |
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| 142 | const G4MaterialCutsCouple* currentCouple; |
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| 143 | |
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| 144 | static G4double ener[106]; |
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| 145 | static G4double TCSE[103][106]; |
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| 146 | static G4double FTCSE[103][106]; |
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| 147 | static G4double TCSP[103][106]; |
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| 148 | static G4double FTCSP[103][106]; |
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| 149 | |
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| 150 | }; |
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| 151 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 152 | |
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| 153 | inline |
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| 154 | void G4GoudsmitSaundersonMscModel::SetParticle(const G4ParticleDefinition* p) |
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| 155 | { |
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| 156 | if (p != particle) { |
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| 157 | particle = p; |
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| 158 | mass = p->GetPDGMass(); |
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| 159 | charge = p->GetPDGCharge()/eplus; |
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| 160 | } |
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| 161 | } |
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| 162 | |
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| 163 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 164 | |
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| 165 | inline G4double G4GoudsmitSaundersonMscModel::GetLambda(G4double e) |
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| 166 | { |
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| 167 | G4double x; |
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| 168 | if(theLambdaTable) { |
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| 169 | G4bool b; |
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| 170 | x = ((*theLambdaTable)[currentMaterialIndex])->GetValue(e, b); |
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| 171 | } else { |
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| 172 | x = CrossSection(currentCouple,particle,e); |
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| 173 | } |
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| 174 | |
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| 175 | if(x > DBL_MIN) x = 1./x; |
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| 176 | else x = DBL_MAX; |
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| 177 | return x; |
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| 178 | } |
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| 179 | |
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| 180 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 181 | |
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| 182 | #endif |
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| 183 | |
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