[1350] | 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 | // G4IonCoulombCrossSection.hh |
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| 27 | //------------------------------------------------------------------- |
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| 28 | // |
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| 29 | // GEANT4 Class header file |
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| 30 | // |
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| 31 | // File name: G4IonCoulombCrossSection |
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| 32 | // |
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| 33 | // Author: Cristina Consolandi |
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| 34 | // |
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| 35 | // Creation date: 05.10.2010 from G4eCoulombScatteringModel |
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| 36 | // |
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| 37 | // Class Description: |
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| 38 | // Computation of Screen-Coulomb Cross Section |
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| 39 | // for protons, alpha and heavy Ions |
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| 40 | // |
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| 41 | // |
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| 42 | // Reference: |
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| 43 | // M.J. Boschini et al. "Nuclear and Non-Ionizing Energy-Loss |
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| 44 | // for Coulomb Scattered Particles from Low Energy up to Relativistic |
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| 45 | // Regime in Space Radiation Environment" |
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| 46 | // Accepted for publication in the Proceedings of the ICATPP Conference |
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| 47 | // on Cosmic Rays for Particle and Astroparticle Physics, Villa Olmo, 7-8 |
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| 48 | // October, 2010, to be published by World Scientific (Singapore). |
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| 49 | // |
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| 50 | // Available for downloading at: |
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| 51 | // http://arxiv.org/abs/1011.4822 |
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| 52 | // |
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| 53 | // ------------------------------------------------------------------- |
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| 54 | |
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| 55 | // |
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| 56 | #ifndef G4IonCoulombCrossSection_h |
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| 57 | #define G4IonCoulombCrossSection_h 1 |
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| 58 | |
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| 59 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 60 | |
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| 61 | #include "globals.hh" |
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| 62 | #include "G4Material.hh" |
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| 63 | #include "G4Element.hh" |
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| 64 | #include "G4ElementVector.hh" |
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| 65 | #include "G4NistManager.hh" |
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| 66 | #include "G4ThreeVector.hh" |
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| 67 | #include "G4Pow.hh" |
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| 68 | #include "G4LossTableManager.hh" |
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| 69 | |
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| 70 | class G4ParticleDefinition; |
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| 71 | |
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| 72 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 73 | |
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| 74 | class G4IonCoulombCrossSection |
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| 75 | { |
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| 76 | |
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| 77 | public: |
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| 78 | |
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| 79 | G4IonCoulombCrossSection(); |
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| 80 | |
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| 81 | virtual ~G4IonCoulombCrossSection(); |
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| 82 | |
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| 83 | void Initialise(const G4ParticleDefinition*, G4double cosThetaLim); |
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| 84 | |
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| 85 | G4double NuclearCrossSection(); |
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| 86 | |
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| 87 | G4double SampleCosineTheta(); |
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| 88 | |
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| 89 | inline void SetupParticle(const G4ParticleDefinition*); |
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| 90 | |
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| 91 | void SetupKinematic(G4double kinEnergy, G4double cut,G4int iz); |
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| 92 | |
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| 93 | void SetupTarget(G4double Z, G4double kinEnergy,G4int heavycorr); |
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| 94 | |
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| 95 | inline G4double GetMomentum2(); |
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| 96 | |
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| 97 | private: |
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| 98 | void SetScreenRSquare(G4int iz); |
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| 99 | |
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| 100 | |
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| 101 | G4IonCoulombCrossSection & operator=(const G4IonCoulombCrossSection &right); |
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| 102 | G4IonCoulombCrossSection(const G4IonCoulombCrossSection&); |
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| 103 | |
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| 104 | |
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| 105 | |
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| 106 | const G4ParticleDefinition* theProton; |
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| 107 | |
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| 108 | G4NistManager* fNistManager; |
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| 109 | |
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| 110 | protected: |
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| 111 | G4double coeff; |
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| 112 | |
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| 113 | //cost - min - max |
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| 114 | G4double cosThetaMin;// def 1.0 |
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| 115 | G4double cosThetaMax;// def -1.0 |
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| 116 | |
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| 117 | //SetupTarget |
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| 118 | G4double cosTetMinNuc;// -->cosThetaMin |
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| 119 | G4double cosTetMaxNuc;// -->cosThetaMax |
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| 120 | |
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| 121 | |
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| 122 | //cross section |
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| 123 | G4double nucXSection; |
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| 124 | |
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| 125 | //energy cut |
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| 126 | G4double ecut; |
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| 127 | G4double etag; |
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| 128 | |
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| 129 | // projectile........................ |
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| 130 | const G4ParticleDefinition* particle; |
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| 131 | |
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| 132 | G4double chargeSquare; |
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| 133 | G4double spin; |
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| 134 | G4double mass; |
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| 135 | |
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| 136 | //lab of incedent particle |
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| 137 | G4double tkinLab; |
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| 138 | G4double momLab2; |
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| 139 | G4double invbetaLab2; |
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| 140 | |
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| 141 | //relative system with nucleus |
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| 142 | G4double tkin; |
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| 143 | G4double mom2; |
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| 144 | G4double invbeta2; |
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| 145 | |
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| 146 | // target nucleus |
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| 147 | G4double targetZ; |
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| 148 | G4double targetMass; |
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| 149 | G4double screenZ; |
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| 150 | |
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| 151 | |
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| 152 | private: |
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| 153 | |
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| 154 | G4double alpha2; |
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| 155 | G4double ScreenRSquare; |
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| 156 | |
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| 157 | }; |
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| 158 | |
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| 159 | |
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| 160 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 161 | |
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| 162 | inline void G4IonCoulombCrossSection::SetupParticle(const G4ParticleDefinition* p) |
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| 163 | { |
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| 164 | particle = p; |
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| 165 | mass = particle->GetPDGMass(); |
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| 166 | spin = particle->GetPDGSpin(); |
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| 167 | if(0.0 != spin) { spin = 0.5; } |
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| 168 | G4double q = std::fabs(particle->GetPDGCharge()/eplus); |
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| 169 | chargeSquare = q*q; |
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| 170 | tkin = 0.0; |
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| 171 | } |
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| 172 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 173 | |
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| 174 | |
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| 175 | inline G4double G4IonCoulombCrossSection::GetMomentum2(){ |
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| 176 | return mom2; |
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| 177 | } |
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| 178 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 179 | |
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| 180 | #endif |
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| 181 | |
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| 182 | |
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