[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: G4alphaIonisation.cc,v 1.1 2009/11/10 11:50:30 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: G4alphaIonisation |
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| 35 | // |
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| 36 | // Author: Vladimir Ivanchenko |
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| 37 | // |
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| 38 | // Creation date: 28.10.2009 created from G4ionIonisation |
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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 | // |
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| 44 | // ------------------------------------------------------------------- |
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| 45 | // |
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| 46 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 47 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 48 | |
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| 49 | #include "G4alphaIonisation.hh" |
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| 50 | #include "G4Electron.hh" |
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| 51 | #include "G4Alpha.hh" |
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| 52 | #include "G4BraggIonModel.hh" |
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| 53 | #include "G4BetheBlochModel.hh" |
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| 54 | #include "G4UnitsTable.hh" |
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| 55 | #include "G4LossTableManager.hh" |
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| 56 | #include "G4IonFluctuations.hh" |
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| 57 | #include "G4UniversalFluctuation.hh" |
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| 58 | |
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| 59 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 60 | |
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| 61 | using namespace std; |
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| 62 | |
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| 63 | G4alphaIonisation::G4alphaIonisation(const G4String& name) |
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| 64 | : G4VEnergyLossProcess(name), |
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| 65 | theParticle(0), |
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| 66 | isInitialised(false), |
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| 67 | nuclearStopping(true) |
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| 68 | { |
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| 69 | // SetLinearLossLimit(0.15); |
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| 70 | SetStepFunction(0.2, 0.1*mm); |
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| 71 | // SetIntegral(true); |
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| 72 | SetProcessSubType(fIonisation); |
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| 73 | // SetVerboseLevel(1); |
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| 74 | mass = 0.0; |
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| 75 | ratio = 0.0; |
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| 76 | } |
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| 77 | |
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| 78 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 79 | |
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| 80 | G4alphaIonisation::~G4alphaIonisation() |
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| 81 | {} |
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| 82 | |
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| 83 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 84 | |
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| 85 | G4bool G4alphaIonisation::IsApplicable(const G4ParticleDefinition& p) |
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| 86 | { |
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| 87 | return (p.GetPDGCharge() == 2*eplus); |
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| 88 | } |
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| 89 | |
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| 90 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 91 | |
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| 92 | G4double G4alphaIonisation::MinPrimaryEnergy(const G4ParticleDefinition*, |
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| 93 | const G4Material*, |
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| 94 | G4double cut) |
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| 95 | { |
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| 96 | G4double x = 0.5*cut/electron_mass_c2; |
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| 97 | G4double g = x*ratio + std::sqrt((1. + x)*(1. + x*ratio*ratio)); |
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| 98 | return mass*(g - 1.0); |
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| 99 | } |
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| 100 | |
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| 101 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 102 | |
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| 103 | void G4alphaIonisation::InitialiseEnergyLossProcess( |
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| 104 | const G4ParticleDefinition* part, |
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| 105 | const G4ParticleDefinition* bpart) |
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| 106 | { |
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| 107 | if(!isInitialised) { |
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| 108 | |
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| 109 | theParticle = part; |
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| 110 | G4String pname = part->GetParticleName(); |
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| 111 | |
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| 112 | // define base particle |
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| 113 | const G4ParticleDefinition* theBaseParticle = 0; |
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| 114 | if(bpart == 0) { |
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| 115 | if(pname != "alpha") { theBaseParticle = G4Alpha::Alpha(); } |
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| 116 | } else { theBaseParticle = bpart; } |
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| 117 | |
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| 118 | mass = part->GetPDGMass(); |
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| 119 | ratio = electron_mass_c2/mass; |
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| 120 | |
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| 121 | SetBaseParticle(theBaseParticle); |
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| 122 | SetSecondaryParticle(G4Electron::Electron()); |
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| 123 | |
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| 124 | if (!EmModel(1)) SetEmModel(new G4BraggIonModel(), 1); |
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| 125 | EmModel(1)->SetLowEnergyLimit(MinKinEnergy()); |
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| 126 | |
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| 127 | // model limit defined for alpha |
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| 128 | eth = (EmModel(1)->HighEnergyLimit())*mass/proton_mass_c2; |
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| 129 | EmModel(1)->SetHighEnergyLimit(eth); |
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| 130 | |
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| 131 | if (!FluctModel()) SetFluctModel(new G4UniversalFluctuation()); |
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| 132 | AddEmModel(1, EmModel(1), new G4IonFluctuations()); |
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| 133 | |
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| 134 | if (!EmModel(2)) SetEmModel(new G4BetheBlochModel(),2); |
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| 135 | EmModel(2)->SetLowEnergyLimit(eth); |
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| 136 | EmModel(2)->SetHighEnergyLimit(MaxKinEnergy()); |
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| 137 | AddEmModel(2, EmModel(2), FluctModel()); |
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| 138 | |
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| 139 | isInitialised = true; |
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| 140 | } |
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| 141 | // reinitialisation of corrections for the new run |
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| 142 | EmModel(1)->ActivateNuclearStopping(nuclearStopping); |
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| 143 | EmModel(2)->ActivateNuclearStopping(nuclearStopping); |
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| 144 | } |
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| 145 | |
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| 146 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 147 | |
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| 148 | void G4alphaIonisation::PrintInfo() |
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| 149 | { |
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| 150 | if (G4Alpha::Alpha() == theParticle) { |
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| 151 | if(EmModel(1) && EmModel(2)) { |
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| 152 | G4cout << " NuclearStopping= " << nuclearStopping |
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| 153 | << G4endl; |
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| 154 | } |
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| 155 | } |
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| 156 | } |
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| 157 | |
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| 158 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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