Geant4  10.02.p01
G4eLowEnergyLoss.icc
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27 // $Id$
28 // GEANT4 tag $Name: geant4-09-01-ref-00 $
29 //
30 // ---------------------------------------------------------------
31 // GEANT 4 class inlined methods file
32 //
33 // History: based on object model of
34 // 2nd December 1995, G.Cosmo
35 // ------------ G4eLowEnergyLoss physics process ------------
36 // by Laszlo Urban, 20 March 1997
37 // ***************************************************************
38 // It is the first implementation of the NEW UNIFIED ENERGY LOSS PROCESS.
39 // It calculates the energy loss of e+/e-.
40 // -------------------------------------------------------------
41 //
42 // 08-09-98 cleanup
43 // 28-03-02 V.Ivanchenko add fluorescence flag
44 // 21-01-03 V.Ivanchenko cut per region
45 // 18-04-03 V.Ivanchenko finalRange redefinition
46 //
47 // ---------------------------------------------------------------
48 
49 inline G4double G4eLowEnergyLoss::GetConstraints(
50  const G4DynamicParticle* aParticle,
51  const G4MaterialCutsCouple* couple)
52 {
53  G4double StepLimit;
54  // returns the Step limit
55  // dRoverRange is the max. allowed relative range loss in one Step
56  // it calculates dEdx and the range as well....
57 
58  const G4ParticleDefinition* ParticleType=aParticle->GetDefinition();
59 
60  Charge = aParticle->GetDefinition()->GetPDGCharge();
61  if(Charge != lastCharge) lastCharge = Charge ;
62 
63  G4double KineticEnergy = aParticle->GetKineticEnergy();
64 
65  fdEdx = G4EnergyLossTables::GetDEDX(ParticleType,KineticEnergy,couple);
66  fRangeNow =
67  G4EnergyLossTables::GetRange(ParticleType,KineticEnergy,couple);
68 
69  G4double r = std::min(finalRange, couple->GetProductionCuts()
70  ->GetProductionCut(idxG4ElectronCut));
71 
72  if (fRangeNow > r) {
73  StepLimit = dRoverRange*fRangeNow + r*(1.0 - dRoverRange)*(2.0 - r/fRangeNow);
74  //randomise this value
75  if (rndmStepFlag) StepLimit = finalRange + (StepLimit-finalRange)*G4UniformRand();
76  if (StepLimit > fRangeNow) StepLimit = fRangeNow;
77  }
78  else StepLimit = fRangeNow;
79 
80  return StepLimit;
81 }
82 
83 //
84 
85 inline G4double G4eLowEnergyLoss::GetContinuousStepLimit(
86  const G4Track& track,
87  G4double,
88  G4double currentMinimumStep,
89  G4double&)
90 {
91 
92  G4double Step =
93  GetConstraints(track.GetDynamicParticle(),track.GetMaterialCutsCouple());
94 
95  if ((Step>0.0)&&(Step<currentMinimumStep)) currentMinimumStep = Step;
96 
97  return Step ;
98 }
99 
100 //
101 inline G4bool G4eLowEnergyLoss::IsApplicable(const G4ParticleDefinition&
102  particle)
103 {
104  return( (&particle == G4Electron::Electron())
105  ||(&particle == G4Positron::Positron()) );
106 }
107 
108 inline void G4eLowEnergyLoss::ActivateFluorescence(G4bool val)
109 {
110  theFluo = val;
111 }
112 
113 inline G4bool G4eLowEnergyLoss::Fluorescence() const
114 {
115  return theFluo;
116 }
117 
118 //
119