[819] | 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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| 27 | // $Id: G4TransitionRadiation.cc,v 1.7 2006/06/29 19:56:19 gunter Exp $ |
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[1007] | 28 | // GEANT4 tag $Name: geant4-09-02 $ |
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[819] | 29 | // |
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| 30 | // G4TransitionRadiation class -- implementation file |
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| 31 | |
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| 32 | // GEANT 4 class implementation file --- Copyright CERN 1995 |
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| 33 | // CERN Geneva Switzerland |
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| 34 | |
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| 35 | // For information related to this code, please, contact |
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| 36 | // CERN, CN Division, ASD Group |
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| 37 | // History: |
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| 38 | // 1st version 11.09.97 V. Grichine (Vladimir.Grichine@cern.ch ) |
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| 39 | // 2nd version 16.12.97 V. Grichine |
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| 40 | // 3rd version 28.07.05, P.Gumplinger add G4ProcessType to constructor |
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| 41 | |
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| 42 | |
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| 43 | #include <cmath> |
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| 44 | // #include "G4ios.hh" |
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| 45 | // #include <fstream.h> |
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| 46 | // #include <stdlib.h> |
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| 47 | |
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| 48 | #include "G4TransitionRadiation.hh" |
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| 49 | #include "G4Material.hh" |
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| 50 | |
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| 51 | // Init gamma array |
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| 52 | |
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| 53 | |
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| 54 | // Local constants |
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| 55 | |
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| 56 | const G4int G4TransitionRadiation::fSympsonNumber = 100 ; |
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| 57 | const G4int G4TransitionRadiation::fGammaNumber = 15 ; |
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| 58 | const G4int G4TransitionRadiation::fPointNumber = 100 ; |
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| 59 | |
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| 60 | using namespace std; |
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| 61 | |
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| 62 | /////////////////////////////////////////////////////////////////////// |
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| 63 | // |
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| 64 | // Constructor for selected couple of materials |
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| 65 | // |
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| 66 | |
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| 67 | G4TransitionRadiation:: |
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| 68 | G4TransitionRadiation( const G4String& processName, G4ProcessType type ) |
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| 69 | : G4VDiscreteProcess(processName, type) |
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| 70 | { |
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| 71 | // fMatIndex1 = pMat1->GetIndex() ; |
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| 72 | // fMatIndex2 = pMat2->GetIndex() ; |
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| 73 | } |
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| 74 | |
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| 75 | ////////////////////////////////////////////////////////////////////// |
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| 76 | // |
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| 77 | // Destructor |
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| 78 | // |
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| 79 | |
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| 80 | G4TransitionRadiation::~G4TransitionRadiation() |
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| 81 | { |
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| 82 | ; |
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| 83 | } |
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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 | // Sympson integral of TR spectral-angle density over energy between |
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| 89 | // the limits energy 1 and energy2 at fixed varAngle = 1 - cos(Theta) |
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| 90 | |
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| 91 | G4double |
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| 92 | G4TransitionRadiation::IntegralOverEnergy( G4double energy1, |
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| 93 | G4double energy2, |
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| 94 | G4double varAngle ) const |
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| 95 | { |
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| 96 | G4int i ; |
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| 97 | G4double h , sumEven = 0.0 , sumOdd = 0.0 ; |
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| 98 | h = 0.5*(energy2 - energy1)/fSympsonNumber ; |
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| 99 | for(i=1;i<fSympsonNumber;i++) |
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| 100 | { |
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| 101 | sumEven += SpectralAngleTRdensity(energy1 + 2*i*h,varAngle) ; |
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| 102 | sumOdd += SpectralAngleTRdensity(energy1 + (2*i - 1)*h,varAngle) ; |
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| 103 | } |
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| 104 | sumOdd += SpectralAngleTRdensity(energy1 + (2*fSympsonNumber - 1)*h,varAngle) ; |
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| 105 | return h*( SpectralAngleTRdensity(energy1,varAngle) |
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| 106 | + SpectralAngleTRdensity(energy2,varAngle) |
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| 107 | + 4.0*sumOdd + 2.0*sumEven )/3.0 ; |
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| 108 | } |
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| 109 | |
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| 110 | |
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| 111 | |
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| 112 | /////////////////////////////////////////////////////////////////// |
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| 113 | // |
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| 114 | // Sympson integral of TR spectral-angle density over energy between |
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| 115 | // the limits varAngle1 and varAngle2 at fixed energy |
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| 116 | |
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| 117 | G4double |
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| 118 | G4TransitionRadiation::IntegralOverAngle( G4double energy, |
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| 119 | G4double varAngle1, |
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| 120 | G4double varAngle2 ) const |
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| 121 | { |
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| 122 | G4int i ; |
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| 123 | G4double h , sumEven = 0.0 , sumOdd = 0.0 ; |
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| 124 | h = 0.5*(varAngle2 - varAngle1)/fSympsonNumber ; |
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| 125 | for(i=1;i<fSympsonNumber;i++) |
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| 126 | { |
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| 127 | sumEven += SpectralAngleTRdensity(energy,varAngle1 + 2*i*h) ; |
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| 128 | sumOdd += SpectralAngleTRdensity(energy,varAngle1 + (2*i - 1)*h) ; |
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| 129 | } |
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| 130 | sumOdd += SpectralAngleTRdensity(energy,varAngle1 + (2*fSympsonNumber - 1)*h) ; |
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| 131 | |
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| 132 | return h*( SpectralAngleTRdensity(energy,varAngle1) |
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| 133 | + SpectralAngleTRdensity(energy,varAngle2) |
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| 134 | + 4.0*sumOdd + 2.0*sumEven )/3.0 ; |
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| 135 | } |
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| 136 | |
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| 137 | /////////////////////////////////////////////////////////////////// |
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| 138 | // |
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| 139 | // The number of transition radiation photons generated in the |
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| 140 | // angle interval between varAngle1 and varAngle2 |
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| 141 | // |
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| 142 | |
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| 143 | G4double G4TransitionRadiation:: |
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| 144 | AngleIntegralDistribution( G4double varAngle1, |
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| 145 | G4double varAngle2 ) const |
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| 146 | { |
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| 147 | G4int i ; |
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| 148 | G4double h , sumEven = 0.0 , sumOdd = 0.0 ; |
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| 149 | h = 0.5*(varAngle2 - varAngle1)/fSympsonNumber ; |
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| 150 | for(i=1;i<fSympsonNumber;i++) |
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| 151 | { |
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| 152 | sumEven += IntegralOverEnergy(fMinEnergy, |
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| 153 | fMinEnergy +0.3*(fMaxEnergy-fMinEnergy), |
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| 154 | varAngle1 + 2*i*h) |
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| 155 | + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy), |
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| 156 | fMaxEnergy, |
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| 157 | varAngle1 + 2*i*h); |
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| 158 | sumOdd += IntegralOverEnergy(fMinEnergy, |
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| 159 | fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy), |
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| 160 | varAngle1 + (2*i - 1)*h) |
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| 161 | + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy), |
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| 162 | fMaxEnergy, |
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| 163 | varAngle1 + (2*i - 1)*h) ; |
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| 164 | } |
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| 165 | sumOdd += IntegralOverEnergy(fMinEnergy, |
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| 166 | fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy), |
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| 167 | varAngle1 + (2*fSympsonNumber - 1)*h) |
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| 168 | + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy), |
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| 169 | fMaxEnergy, |
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| 170 | varAngle1 + (2*fSympsonNumber - 1)*h) ; |
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| 171 | |
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| 172 | return h*(IntegralOverEnergy(fMinEnergy, |
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| 173 | fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy), |
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| 174 | varAngle1) |
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| 175 | + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy), |
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| 176 | fMaxEnergy, |
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| 177 | varAngle1) |
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| 178 | + IntegralOverEnergy(fMinEnergy, |
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| 179 | fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy), |
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| 180 | varAngle2) |
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| 181 | + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy), |
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| 182 | fMaxEnergy, |
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| 183 | varAngle2) |
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| 184 | + 4.0*sumOdd + 2.0*sumEven )/3.0 ; |
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| 185 | } |
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| 186 | |
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| 187 | /////////////////////////////////////////////////////////////////// |
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| 188 | // |
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| 189 | // The number of transition radiation photons, generated in the |
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| 190 | // energy interval between energy1 and energy2 |
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| 191 | // |
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| 192 | |
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| 193 | G4double G4TransitionRadiation:: |
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| 194 | EnergyIntegralDistribution( G4double energy1, |
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| 195 | G4double energy2 ) const |
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| 196 | { |
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| 197 | G4int i ; |
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| 198 | G4double h , sumEven = 0.0 , sumOdd = 0.0 ; |
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| 199 | h = 0.5*(energy2 - energy1)/fSympsonNumber ; |
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| 200 | for(i=1;i<fSympsonNumber;i++) |
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| 201 | { |
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| 202 | sumEven += IntegralOverAngle(energy1 + 2*i*h,0.0,0.01*fMaxTheta ) |
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| 203 | + IntegralOverAngle(energy1 + 2*i*h,0.01*fMaxTheta,fMaxTheta); |
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| 204 | sumOdd += IntegralOverAngle(energy1 + (2*i - 1)*h,0.0,0.01*fMaxTheta) |
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| 205 | + IntegralOverAngle(energy1 + (2*i - 1)*h,0.01*fMaxTheta,fMaxTheta) ; |
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| 206 | } |
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| 207 | sumOdd += IntegralOverAngle(energy1 + (2*fSympsonNumber - 1)*h, |
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| 208 | 0.0,0.01*fMaxTheta) |
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| 209 | + IntegralOverAngle(energy1 + (2*fSympsonNumber - 1)*h, |
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| 210 | 0.01*fMaxTheta,fMaxTheta) ; |
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| 211 | |
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| 212 | return h*(IntegralOverAngle(energy1,0.0,0.01*fMaxTheta) |
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| 213 | + IntegralOverAngle(energy1,0.01*fMaxTheta,fMaxTheta) |
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| 214 | + IntegralOverAngle(energy2,0.0,0.01*fMaxTheta) |
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| 215 | + IntegralOverAngle(energy2,0.01*fMaxTheta,fMaxTheta) |
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| 216 | + 4.0*sumOdd + 2.0*sumEven )/3.0 ; |
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| 217 | } |
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| 218 | |
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| 219 | |
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| 220 | |
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| 221 | |
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| 222 | // end of G4TransitionRadiation implementation file -------------------------- |
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