[1197] | 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: G4ICRU49NuclearStoppingModel.cc,v 1.2 2009/11/10 19:25:47 vnivanch Exp $ |
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[1228] | 27 | // GEANT4 tag $Name: geant4-09-03 $ |
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[1197] | 28 | // |
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| 29 | // ------------------------------------------------------------------- |
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| 30 | // |
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| 31 | // GEANT4 Class file |
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| 32 | // |
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| 33 | // |
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| 34 | // File name: G4ICRU49NuclearStoppingModel |
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| 35 | // |
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| 36 | // Author: V.Ivanchenko |
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| 37 | // |
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| 38 | // Creation date: 09.04.2008 from G4MuMscModel |
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| 39 | // |
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| 40 | // Modifications: |
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| 41 | // |
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| 42 | // |
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| 43 | // Class Description: |
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| 44 | // |
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| 45 | // Implementation of the model of ICRU'49 nuclear stopping |
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| 46 | |
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| 47 | // ------------------------------------------------------------------- |
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| 48 | // |
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| 49 | |
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| 50 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 51 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 52 | |
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| 53 | #include "G4ICRU49NuclearStoppingModel.hh" |
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| 54 | #include "Randomize.hh" |
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| 55 | #include "G4LossTableManager.hh" |
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| 56 | #include "G4ParticleChangeForLoss.hh" |
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| 57 | #include "G4ElementVector.hh" |
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| 58 | #include "G4ProductionCutsTable.hh" |
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| 59 | #include "G4Step.hh" |
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| 60 | #include "G4Pow.hh" |
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| 61 | |
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| 62 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 63 | |
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| 64 | G4double G4ICRU49NuclearStoppingModel::ad[] = {0.0}; |
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| 65 | G4double G4ICRU49NuclearStoppingModel::ed[] = {0.0}; |
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| 66 | |
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| 67 | using namespace std; |
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| 68 | |
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| 69 | G4ICRU49NuclearStoppingModel::G4ICRU49NuclearStoppingModel(const G4String& nam) |
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| 70 | : G4VEmModel(nam),lossFlucFlag(false) |
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| 71 | { |
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| 72 | theZieglerFactor = eV*cm2*1.0e-15; |
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| 73 | g4pow = G4Pow::GetInstance(); |
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| 74 | if(ad[0] == 0.0) InitialiseNuclearStopping(); |
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| 75 | } |
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| 76 | |
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| 77 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 78 | |
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| 79 | G4ICRU49NuclearStoppingModel::~G4ICRU49NuclearStoppingModel() |
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| 80 | {} |
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| 81 | |
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| 82 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 83 | |
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| 84 | void G4ICRU49NuclearStoppingModel::Initialise(const G4ParticleDefinition*, |
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| 85 | const G4DataVector&) |
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| 86 | {} |
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| 87 | |
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| 88 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 89 | |
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| 90 | void |
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| 91 | G4ICRU49NuclearStoppingModel::SampleSecondaries(std::vector<G4DynamicParticle*>*, |
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| 92 | const G4MaterialCutsCouple*, |
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| 93 | const G4DynamicParticle*, |
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| 94 | G4double, G4double) |
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| 95 | {} |
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| 96 | |
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| 97 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 98 | |
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| 99 | G4double |
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| 100 | G4ICRU49NuclearStoppingModel::ComputeDEDXPerVolume(const G4Material* mat, |
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| 101 | const G4ParticleDefinition* p, |
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| 102 | G4double kinEnergy, |
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| 103 | G4double) |
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| 104 | { |
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| 105 | G4double nloss = 0.0; |
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| 106 | if(kinEnergy <= 0.0) return nloss; |
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| 107 | |
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| 108 | // projectile |
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| 109 | G4double m1 = p->GetPDGMass(); |
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| 110 | G4double z1 = std::fabs(p->GetPDGCharge()/eplus); |
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| 111 | |
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| 112 | if(kinEnergy*proton_mass_c2/m1 > z1*z1*100.*MeV) return nloss; |
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| 113 | |
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| 114 | // Projectile nucleus |
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| 115 | m1 /= amu_c2; |
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| 116 | |
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| 117 | // loop for the elements in the material |
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| 118 | G4int numberOfElements = mat->GetNumberOfElements(); |
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| 119 | const G4ElementVector* theElementVector = mat->GetElementVector(); |
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| 120 | const G4double* atomDensity = mat->GetAtomicNumDensityVector(); |
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| 121 | |
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| 122 | for (G4int iel=0; iel<numberOfElements; iel++) { |
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| 123 | const G4Element* element = (*theElementVector)[iel] ; |
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| 124 | G4double z2 = element->GetZ(); |
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| 125 | G4double m2 = element->GetA()*mole/g ; |
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| 126 | nloss += (NuclearStoppingPower(kinEnergy, z1, z2, m1, m2)) |
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| 127 | * atomDensity[iel] ; |
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| 128 | } |
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| 129 | nloss *= theZieglerFactor; |
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| 130 | return nloss; |
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| 131 | } |
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| 132 | |
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| 133 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 134 | |
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| 135 | G4double |
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| 136 | G4ICRU49NuclearStoppingModel::NuclearStoppingPower(G4double kineticEnergy, |
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| 137 | G4double z1, G4double z2, |
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| 138 | G4double m1, G4double m2) |
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| 139 | { |
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| 140 | G4double energy = kineticEnergy/keV ; // energy in keV |
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| 141 | G4double nloss = 0.0; |
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| 142 | G4double z12 = z1*z2; |
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| 143 | G4int iz1 = G4int(z1); |
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| 144 | G4int iz2 = G4int(z2); |
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| 145 | |
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| 146 | G4double rm; |
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| 147 | if(iz1 > 1) rm = (m1 + m2) * ( g4pow->Z23(iz1) + g4pow->Z23(iz2) ); |
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| 148 | else rm = (m1 + m2) * g4pow->Z13(iz2); |
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| 149 | |
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| 150 | G4double er = 32.536 * m2 * energy / ( z12 * rm ) ; // reduced energy |
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| 151 | |
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| 152 | if (er >= ed[0]) nloss = ad[0]; |
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| 153 | else { |
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| 154 | // the table is inverse in energy |
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| 155 | for (G4int i=102; i>=0; --i) |
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| 156 | { |
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| 157 | if (er <= ed[i]) { |
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| 158 | nloss = (ad[i] - ad[i+1])*(er - ed[i+1])/(ed[i] - ed[i+1]) + ad[i+1]; |
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| 159 | break; |
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| 160 | } |
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| 161 | } |
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| 162 | } |
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| 163 | |
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| 164 | // Stragling |
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| 165 | if(lossFlucFlag) { |
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| 166 | // G4double sig = 4.0 * m1 * m2 / ((m1 + m2)*(m1 + m2)* |
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| 167 | // (4.0 + 0.197*std::pow(er,-1.6991)+6.584*std::pow(er,-1.0494))) ; |
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| 168 | G4double sig = 4.0 * m1 * m2 / ((m1 + m2)*(m1 + m2)* |
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| 169 | (4.0 + 0.197/(er*er) + 6.584/er)); |
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| 170 | |
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| 171 | nloss *= G4RandGauss::shoot(1.0,sig) ; |
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| 172 | lossFlucFlag = false; |
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| 173 | } |
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| 174 | |
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| 175 | nloss *= 8.462 * z12 * m1 / rm ; // Return to [ev/(10^15 atoms/cm^2] |
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| 176 | |
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| 177 | if ( nloss < 0.0) nloss = 0.0 ; |
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| 178 | |
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| 179 | return nloss; |
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| 180 | } |
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| 181 | |
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| 182 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 183 | |
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| 184 | void G4ICRU49NuclearStoppingModel::InitialiseNuclearStopping() |
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| 185 | { |
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| 186 | const G4double nuca[104][2] = { |
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| 187 | { 1.0E+8, 5.831E-8}, |
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| 188 | { 8.0E+7, 7.288E-8}, |
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| 189 | { 6.0E+7, 9.719E-8}, |
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| 190 | { 5.0E+7, 1.166E-7}, |
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| 191 | { 4.0E+7, 1.457E-7}, |
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| 192 | { 3.0E+7, 1.942E-7}, |
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| 193 | { 2.0E+7, 2.916E-7}, |
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| 194 | { 1.5E+7, 3.887E-7}, |
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| 195 | |
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| 196 | { 1.0E+7, 5.833E-7}, |
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| 197 | { 8.0E+6, 7.287E-7}, |
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| 198 | { 6.0E+6, 9.712E-7}, |
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| 199 | { 5.0E+6, 1.166E-6}, |
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| 200 | { 4.0E+6, 1.457E-6}, |
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| 201 | { 3.0E+6, 1.941E-6}, |
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| 202 | { 2.0E+6, 2.911E-6}, |
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| 203 | { 1.5E+6, 3.878E-6}, |
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| 204 | |
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| 205 | { 1.0E+6, 5.810E-6}, |
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| 206 | { 8.0E+5, 7.262E-6}, |
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| 207 | { 6.0E+5, 9.663E-6}, |
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| 208 | { 5.0E+5, 1.157E-5}, |
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| 209 | { 4.0E+5, 1.442E-5}, |
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| 210 | { 3.0E+5, 1.913E-5}, |
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| 211 | { 2.0E+5, 2.845E-5}, |
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| 212 | { 1.5E+5, 3.762E-5}, |
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| 213 | |
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| 214 | { 1.0E+5, 5.554E-5}, |
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| 215 | { 8.0E+4, 6.866E-5}, |
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| 216 | { 6.0E+4, 9.020E-5}, |
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| 217 | { 5.0E+4, 1.070E-4}, |
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| 218 | { 4.0E+4, 1.319E-4}, |
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| 219 | { 3.0E+4, 1.722E-4}, |
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| 220 | { 2.0E+4, 2.499E-4}, |
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| 221 | { 1.5E+4, 3.248E-4}, |
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| 222 | |
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| 223 | { 1.0E+4, 4.688E-4}, |
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| 224 | { 8.0E+3, 5.729E-4}, |
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| 225 | { 6.0E+3, 7.411E-4}, |
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| 226 | { 5.0E+3, 8.718E-4}, |
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| 227 | { 4.0E+3, 1.063E-3}, |
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| 228 | { 3.0E+3, 1.370E-3}, |
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| 229 | { 2.0E+3, 1.955E-3}, |
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| 230 | { 1.5E+3, 2.511E-3}, |
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| 231 | |
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| 232 | { 1.0E+3, 3.563E-3}, |
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| 233 | { 8.0E+2, 4.314E-3}, |
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| 234 | { 6.0E+2, 5.511E-3}, |
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| 235 | { 5.0E+2, 6.430E-3}, |
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| 236 | { 4.0E+2, 7.756E-3}, |
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| 237 | { 3.0E+2, 9.855E-3}, |
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| 238 | { 2.0E+2, 1.375E-2}, |
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| 239 | { 1.5E+2, 1.736E-2}, |
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| 240 | |
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| 241 | { 1.0E+2, 2.395E-2}, |
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| 242 | { 8.0E+1, 2.850E-2}, |
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| 243 | { 6.0E+1, 3.552E-2}, |
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| 244 | { 5.0E+1, 4.073E-2}, |
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| 245 | { 4.0E+1, 4.802E-2}, |
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| 246 | { 3.0E+1, 5.904E-2}, |
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| 247 | { 1.5E+1, 9.426E-2}, |
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| 248 | |
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| 249 | { 1.0E+1, 1.210E-1}, |
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| 250 | { 8.0E+0, 1.377E-1}, |
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| 251 | { 6.0E+0, 1.611E-1}, |
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| 252 | { 5.0E+0, 1.768E-1}, |
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| 253 | { 4.0E+0, 1.968E-1}, |
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| 254 | { 3.0E+0, 2.235E-1}, |
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| 255 | { 2.0E+0, 2.613E-1}, |
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| 256 | { 1.5E+0, 2.871E-1}, |
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| 257 | |
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| 258 | { 1.0E+0, 3.199E-1}, |
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| 259 | { 8.0E-1, 3.354E-1}, |
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| 260 | { 6.0E-1, 3.523E-1}, |
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| 261 | { 5.0E-1, 3.609E-1}, |
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| 262 | { 4.0E-1, 3.693E-1}, |
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| 263 | { 3.0E-1, 3.766E-1}, |
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| 264 | { 2.0E-1, 3.803E-1}, |
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| 265 | { 1.5E-1, 3.788E-1}, |
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| 266 | |
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| 267 | { 1.0E-1, 3.711E-1}, |
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| 268 | { 8.0E-2, 3.644E-1}, |
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| 269 | { 6.0E-2, 3.530E-1}, |
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| 270 | { 5.0E-2, 3.444E-1}, |
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| 271 | { 4.0E-2, 3.323E-1}, |
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| 272 | { 3.0E-2, 3.144E-1}, |
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| 273 | { 2.0E-2, 2.854E-1}, |
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| 274 | { 1.5E-2, 2.629E-1}, |
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| 275 | |
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| 276 | { 1.0E-2, 2.298E-1}, |
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| 277 | { 8.0E-3, 2.115E-1}, |
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| 278 | { 6.0E-3, 1.883E-1}, |
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| 279 | { 5.0E-3, 1.741E-1}, |
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| 280 | { 4.0E-3, 1.574E-1}, |
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| 281 | { 3.0E-3, 1.372E-1}, |
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| 282 | { 2.0E-3, 1.116E-1}, |
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| 283 | { 1.5E-3, 9.559E-2}, |
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| 284 | |
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| 285 | { 1.0E-3, 7.601E-2}, |
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| 286 | { 8.0E-4, 6.668E-2}, |
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| 287 | { 6.0E-4, 5.605E-2}, |
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| 288 | { 5.0E-4, 5.008E-2}, |
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| 289 | { 4.0E-4, 4.352E-2}, |
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| 290 | { 3.0E-4, 3.617E-2}, |
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| 291 | { 2.0E-4, 2.768E-2}, |
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| 292 | { 1.5E-4, 2.279E-2}, |
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| 293 | |
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| 294 | { 1.0E-4, 1.723E-2}, |
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| 295 | { 8.0E-5, 1.473E-2}, |
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| 296 | { 6.0E-5, 1.200E-2}, |
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| 297 | { 5.0E-5, 1.052E-2}, |
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| 298 | { 4.0E-5, 8.950E-3}, |
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| 299 | { 3.0E-5, 7.246E-3}, |
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| 300 | { 2.0E-5, 5.358E-3}, |
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| 301 | { 1.5E-5, 4.313E-3}, |
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| 302 | { 0.0, 3.166E-3} |
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| 303 | }; |
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| 304 | |
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| 305 | for(G4int i=0; i<104; ++i) { |
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| 306 | ed[i] = nuca[i][0]; |
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| 307 | ad[i] = nuca[i][1]; |
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| 308 | } |
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| 309 | } |
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| 310 | |
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| 311 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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