| 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: G4eLowEnergyLoss.icc,v 1.8 2006/06/29 19:37:44 gunter Exp $
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| 28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $
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| 29 | //
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| 30 | // ---------------------------------------------------------------
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| 31 | // GEANT 4 class inlined methods file
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| 32 | //
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| 33 | // History: based on object model of
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| 34 | // 2nd December 1995, G.Cosmo
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| 35 | // ------------ G4eLowEnergyLoss physics process ------------
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| 36 | // by Laszlo Urban, 20 March 1997
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| 37 | // ***************************************************************
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| 38 | // It is the first implementation of the NEW UNIFIED ENERGY LOSS PROCESS.
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| 39 | // It calculates the energy loss of e+/e-.
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| 40 | // -------------------------------------------------------------
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| 41 | //
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| 42 | // 08-09-98 cleanup
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| 43 | // 28-03-02 V.Ivanchenko add fluorescence flag
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| 44 | // 21-01-03 V.Ivanchenko cut per region
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| 45 | // 18-04-03 V.Ivanchenko finalRange redefinition
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| 46 | //
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| 47 | // ---------------------------------------------------------------
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| 48 |
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| 49 | inline G4double G4eLowEnergyLoss::GetConstraints(
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| 50 | const G4DynamicParticle* aParticle,
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| 51 | const G4MaterialCutsCouple* couple)
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| 52 | {
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| 53 | G4double StepLimit;
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| 54 | // returns the Step limit
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| 55 | // dRoverRange is the max. allowed relative range loss in one Step
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| 56 | // it calculates dEdx and the range as well....
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| 57 |
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| 58 | const G4ParticleDefinition* ParticleType=aParticle->GetDefinition();
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| 59 |
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| 60 | Charge = aParticle->GetDefinition()->GetPDGCharge();
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| 61 | if(Charge != lastCharge) lastCharge = Charge ;
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| 62 |
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| 63 | G4double KineticEnergy = aParticle->GetKineticEnergy();
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| 64 |
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| 65 | fdEdx = G4EnergyLossTables::GetDEDX(ParticleType,KineticEnergy,couple);
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| 66 | fRangeNow =
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| 67 | G4EnergyLossTables::GetRange(ParticleType,KineticEnergy,couple);
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| 68 |
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| 69 | G4double r = std::min(finalRange, couple->GetProductionCuts()
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| 70 | ->GetProductionCut(idxG4ElectronCut));
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| 71 |
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| 72 | if (fRangeNow > r) {
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| 73 | StepLimit = dRoverRange*fRangeNow + r*(1.0 - dRoverRange)*(2.0 - r/fRangeNow);
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| 74 | //randomise this value
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| 75 | if (rndmStepFlag) StepLimit = finalRange + (StepLimit-finalRange)*G4UniformRand();
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| 76 | if (StepLimit > fRangeNow) StepLimit = fRangeNow;
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| 77 | }
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| 78 | else StepLimit = fRangeNow;
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| 79 |
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| 80 | return StepLimit;
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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 | inline G4double G4eLowEnergyLoss::GetContinuousStepLimit(
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| 86 | const G4Track& track,
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| 87 | G4double,
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| 88 | G4double currentMinimumStep,
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| 89 | G4double&)
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| 90 | {
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| 91 |
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| 92 | G4double Step =
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| 93 | GetConstraints(track.GetDynamicParticle(),track.GetMaterialCutsCouple());
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| 94 |
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| 95 | if ((Step>0.0)&&(Step<currentMinimumStep)) currentMinimumStep = Step;
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| 96 |
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| 97 | return Step ;
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| 98 | }
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| 99 |
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| 100 | //
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| 101 | inline G4bool G4eLowEnergyLoss::IsApplicable(const G4ParticleDefinition&
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| 102 | particle)
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| 103 | {
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| 104 | return( (&particle == G4Electron::Electron())
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| 105 | ||(&particle == G4Positron::Positron()) );
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| 106 | }
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| 107 |
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| 108 | inline void G4eLowEnergyLoss::ActivateFluorescence(G4bool val)
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| 109 | {
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| 110 | theFluo = val;
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| 111 | }
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| 112 |
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| 113 | inline G4bool G4eLowEnergyLoss::Fluorescence() const
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| 114 | {
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| 115 | return theFluo;
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| 116 | }
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| 117 |
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| 118 | //
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| 119 |
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