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: G4FTFCrossSection.cc,v 1.2 2007/04/24 10:37:10 gunter Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-01-patch-02 $ |
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29 | // |
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30 | |
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31 | #include "G4FTFCrossSection.hh" |
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32 | |
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33 | G4FTFCrossSection::G4FTFCrossSection() |
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34 | {;} |
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35 | |
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36 | |
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37 | G4FTFCrossSection::~G4FTFCrossSection() |
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38 | {;} |
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39 | //********************************************************************************************** |
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40 | |
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41 | G4FTFCrossSection::G4FTFCrossSection(const G4ParticleDefinition * particle, G4double s) |
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42 | { |
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43 | G4int PDGcode = particle->GetPDGEncoding(); |
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44 | G4int absPDGcode = std::abs(PDGcode); |
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45 | G4double Elab = (s - 2*0.88*GeV*GeV)/(2*0.939*GeV)/GeV; |
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46 | G4double Plab = std::sqrt(Elab * Elab - 0.88); |
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47 | |
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48 | G4double LogPlab = std::log( Plab ); |
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49 | G4double sqrLogPlab = LogPlab * LogPlab; |
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50 | |
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51 | //G4cout<<"G4FTFCrossSection Plab "<<Plab<<G4endl; |
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52 | |
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53 | G4int NumberOfTargetProtons = 1; //aNucleus.GetZ(); // ?????????????????????? |
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54 | G4int NumberOfTargetNeutrons = 1; //aNucleus.GetN(); |
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55 | G4int NumberOfTargetNucleons = NumberOfTargetProtons + NumberOfTargetNeutrons; |
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56 | |
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57 | G4double Xtotal, Xelastic; |
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58 | |
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59 | if( absPDGcode > 1000 ) //------Projectile is baryon -------- |
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60 | { |
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61 | G4double XtotPP = 48.0 + 0. *std::pow(Plab, 0. ) + 0.522*sqrLogPlab - 4.51*LogPlab; |
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62 | G4double XtotPN = 47.3 + 0. *std::pow(Plab, 0. ) + 0.513*sqrLogPlab - 4.27*LogPlab; |
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63 | |
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64 | G4double XelPP = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab; |
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65 | G4double XelPN = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab; |
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66 | |
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67 | Xtotal = ( NumberOfTargetProtons * XtotPP + |
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68 | NumberOfTargetNeutrons * XtotPN ) / NumberOfTargetNucleons; |
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69 | Xelastic = ( NumberOfTargetProtons * XelPP + |
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70 | NumberOfTargetNeutrons * XelPN ) / NumberOfTargetNucleons; |
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71 | } |
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72 | else if( PDGcode == 211 ) //------Projectile is PionPlus ------- |
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73 | { |
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74 | G4double XtotPiP = 16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab; |
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75 | G4double XtotPiN = 33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab; |
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76 | |
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77 | G4double XelPiP = 0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab; |
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78 | G4double XelPiN = 1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab; |
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79 | |
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80 | Xtotal = ( NumberOfTargetProtons * XtotPiP + |
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81 | NumberOfTargetNeutrons * XtotPiN ) / NumberOfTargetNucleons; |
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82 | Xelastic = ( NumberOfTargetProtons * XelPiP + |
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83 | NumberOfTargetNeutrons * XelPiN ) / NumberOfTargetNucleons; |
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84 | } |
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85 | else if( PDGcode == -211 ) //------Projectile is PionMinus ------- |
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86 | { |
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87 | G4double XtotPiP = 33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab; |
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88 | G4double XtotPiN = 16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab; |
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89 | |
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90 | G4double XelPiP = 1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab; |
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91 | G4double XelPiN = 0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab; |
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92 | |
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93 | Xtotal = ( NumberOfTargetProtons * XtotPiP + |
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94 | NumberOfTargetNeutrons * XtotPiN ) / NumberOfTargetNucleons; |
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95 | Xelastic = ( NumberOfTargetProtons * XelPiP + |
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96 | NumberOfTargetNeutrons * XelPiN ) / NumberOfTargetNucleons; |
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97 | } |
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98 | |
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99 | else if( PDGcode == 111 ) //------Projectile is PionZero ------- |
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100 | { |
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101 | G4double XtotPiP =(16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab + //Pi+ |
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102 | 33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab)/2; //Pi- |
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103 | |
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104 | G4double XtotPiN =(33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab + //Pi+ |
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105 | 16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab)/2; //Pi- |
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106 | |
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107 | G4double XelPiP =( 0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab + //Pi+ |
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108 | 1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab)/2; //Pi- |
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109 | G4double XelPiN =( 1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab + //Pi+ |
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110 | 0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab)/2; //Pi- |
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111 | |
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112 | Xtotal = ( NumberOfTargetProtons * XtotPiP + |
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113 | NumberOfTargetNeutrons * XtotPiN ) / NumberOfTargetNucleons; |
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114 | Xelastic = ( NumberOfTargetProtons * XelPiP + |
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115 | NumberOfTargetNeutrons * XelPiN ) / NumberOfTargetNucleons; |
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116 | } |
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117 | else if( PDGcode == 321 ) //------Projectile is KaonPlus ------- |
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118 | { |
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119 | G4double XtotKP = 18.1 + 0. *std::pow(Plab, 0. ) + 0.26 *sqrLogPlab - 1.0 *LogPlab; |
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120 | G4double XtotKN = 18.7 + 0. *std::pow(Plab, 0. ) + 0.21 *sqrLogPlab - 0.89*LogPlab; |
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121 | |
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122 | G4double XelKP = 5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab; |
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123 | G4double XelKN = 7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab; |
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124 | |
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125 | Xtotal = ( NumberOfTargetProtons * XtotKP + |
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126 | NumberOfTargetNeutrons * XtotKN ) / NumberOfTargetNucleons; |
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127 | Xelastic = ( NumberOfTargetProtons * XelKP + |
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128 | NumberOfTargetNeutrons * XelKN ) / NumberOfTargetNucleons; |
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129 | } |
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130 | else if( PDGcode ==-321 ) //------Projectile is KaonMinus ------ |
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131 | { |
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132 | G4double XtotKP = 32.1 + 0. *std::pow(Plab, 0. ) + 0.66 *sqrLogPlab - 5.6 *LogPlab; |
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133 | G4double XtotKN = 25.2 + 0. *std::pow(Plab, 0. ) + 0.38 *sqrLogPlab - 2.9 *LogPlab; |
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134 | |
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135 | G4double XelKP = 7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab; |
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136 | G4double XelKN = 5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab; |
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137 | |
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138 | Xtotal = ( NumberOfTargetProtons * XtotKP + |
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139 | NumberOfTargetNeutrons * XtotKN ) / NumberOfTargetNucleons; |
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140 | Xelastic = ( NumberOfTargetProtons * XelKP + |
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141 | NumberOfTargetNeutrons * XelKN ) / NumberOfTargetNucleons; |
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142 | } |
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143 | else if( PDGcode == 311 ) //------Projectile is KaonZero ------ |
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144 | { |
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145 | G4double XtotKP =( 18.1 + 0. *std::pow(Plab, 0. ) + 0.26 *sqrLogPlab - 1.0 *LogPlab + //K+ |
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146 | 32.1 + 0. *std::pow(Plab, 0. ) + 0.66 *sqrLogPlab - 5.6 *LogPlab)/2; //K- |
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147 | G4double XtotKN =( 18.7 + 0. *std::pow(Plab, 0. ) + 0.21 *sqrLogPlab - 0.89*LogPlab + //K+ |
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148 | 25.2 + 0. *std::pow(Plab, 0. ) + 0.38 *sqrLogPlab - 2.9 *LogPlab)/2; //K- |
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149 | |
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150 | G4double XelKP =( 5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab + //K+ |
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151 | 7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab)/2; //K- |
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152 | G4double XelKN =( 7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab + //K+ |
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153 | 5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab)/2; //K- |
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154 | Xtotal = ( NumberOfTargetProtons * XtotKP + |
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155 | NumberOfTargetNeutrons * XtotKN ) / NumberOfTargetNucleons; |
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156 | Xelastic = ( NumberOfTargetProtons * XelKP + |
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157 | NumberOfTargetNeutrons * XelKN ) / NumberOfTargetNucleons; |
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158 | } |
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159 | else //------Projectile is undefined, Nucleon assumed |
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160 | { |
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161 | G4double XtotPP = 48.0 + 0. *std::pow(Plab, 0. ) + 0.522*sqrLogPlab - 4.51*LogPlab; |
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162 | G4double XtotPN = 47.3 + 0. *std::pow(Plab, 0. ) + 0.513*sqrLogPlab - 4.27*LogPlab; |
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163 | |
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164 | G4double XelPP = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab; |
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165 | G4double XelPN = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab; |
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166 | |
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167 | Xtotal = ( NumberOfTargetProtons * XtotPP + |
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168 | NumberOfTargetNeutrons * XtotPN ) / NumberOfTargetNucleons; |
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169 | Xelastic = ( NumberOfTargetProtons * XelPP + |
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170 | NumberOfTargetNeutrons * XelPN ) / NumberOfTargetNucleons; |
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171 | }; |
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172 | |
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173 | SetTotalCrossSection(Xtotal); |
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174 | SetElastisCrossSection(Xelastic); |
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175 | SetInelasticCrossSection(Xtotal-Xelastic); |
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176 | |
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177 | //G4cout<<"G4FTFCrossSection Xt Xel "<<Xtotal<<" "<<Xelastic<<G4endl; |
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178 | |
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179 | //----------------------------------------------------------------------------------- |
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180 | SetSlope( Xtotal*Xtotal/16./pi/Xelastic/0.3894 ); // Slope parameter of elastic scattering |
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181 | // (GeV/c)^(-2)) |
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182 | // Gaussian parametrization of |
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183 | // elastic scattering amplitude assumed |
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184 | |
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185 | //G4cout<<"G4FTFCrossSection Slope "<<GetSlope()<<G4endl; |
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186 | |
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187 | //----------------------------------------------------------------------------------- |
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188 | SetGamma0( GetSlope()*Xtotal/10./2./pi ); |
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189 | //----------------------------------------------------------------------------------- |
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190 | |
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191 | //G4cout<<"G4FTFCrossSection Out"<<G4endl; |
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192 | |
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193 | } |
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194 | //********************************************************************************************** |
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