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26 // 26 //
>> 27 // $Id: G4eLowEnergyLoss.icc,v 1.8 2006/06/29 19:37:44 gunter Exp $
>> 28 // GEANT4 tag $Name: geant4-09-01-ref-00 $
27 // 29 //
28 // ------------------------------------------- 30 // ---------------------------------------------------------------
29 // GEANT 4 class inlined methods file 31 // GEANT 4 class inlined methods file
30 // 32 //
31 // History: based on object model of 33 // History: based on object model of
32 // 2nd December 1995, G.Cosmo 34 // 2nd December 1995, G.Cosmo
33 // ------------ G4eLowEnergyLoss physics 35 // ------------ G4eLowEnergyLoss physics process ------------
34 // by Laszlo Urban, 20 March 36 // by Laszlo Urban, 20 March 1997
35 // ******************************************* 37 // ***************************************************************
36 // It is the first implementation of the NEW U 38 // It is the first implementation of the NEW UNIFIED ENERGY LOSS PROCESS.
37 // It calculates the energy loss of e+/e-. 39 // It calculates the energy loss of e+/e-.
38 // ------------------------------------------- 40 // -------------------------------------------------------------
39 // 41 //
40 // 08-09-98 cleanup 42 // 08-09-98 cleanup
41 // 28-03-02 V.Ivanchenko add fluorescence fla 43 // 28-03-02 V.Ivanchenko add fluorescence flag
42 // 21-01-03 V.Ivanchenko cut per region 44 // 21-01-03 V.Ivanchenko cut per region
43 // 18-04-03 V.Ivanchenko finalRange redefinit 45 // 18-04-03 V.Ivanchenko finalRange redefinition
44 // 46 //
45 // ------------------------------------------- 47 // ---------------------------------------------------------------
46 48
47 inline G4double G4eLowEnergyLoss::GetConstrain 49 inline G4double G4eLowEnergyLoss::GetConstraints(
48 const G4 50 const G4DynamicParticle* aParticle,
49 const G4 51 const G4MaterialCutsCouple* couple)
50 { 52 {
51 G4double StepLimit; 53 G4double StepLimit;
52 // returns the Step limit 54 // returns the Step limit
53 // dRoverRange is the max. allowed relative 55 // dRoverRange is the max. allowed relative range loss in one Step
54 // it calculates dEdx and the range as well. 56 // it calculates dEdx and the range as well....
55 57
56 const G4ParticleDefinition* ParticleType=aPa 58 const G4ParticleDefinition* ParticleType=aParticle->GetDefinition();
57 59
58 Charge = aParticle->GetDefinition()->GetPDGC 60 Charge = aParticle->GetDefinition()->GetPDGCharge();
59 if(Charge != lastCharge) lastCharge = Charge 61 if(Charge != lastCharge) lastCharge = Charge ;
60 62
61 G4double KineticEnergy = aParticle->GetKinet 63 G4double KineticEnergy = aParticle->GetKineticEnergy();
62 64
63 fdEdx = G4EnergyLossTables::GetDEDX(Particle 65 fdEdx = G4EnergyLossTables::GetDEDX(ParticleType,KineticEnergy,couple);
64 fRangeNow = 66 fRangeNow =
65 G4EnergyLossTables::GetRange(Partic 67 G4EnergyLossTables::GetRange(ParticleType,KineticEnergy,couple);
66 68
67 G4double r = std::min(finalRange, couple->Ge 69 G4double r = std::min(finalRange, couple->GetProductionCuts()
68 ->GetProductionCut(idxG4Elect 70 ->GetProductionCut(idxG4ElectronCut));
69 71
70 if (fRangeNow > r) { 72 if (fRangeNow > r) {
71 StepLimit = dRoverRange*fRangeNow + r*(1.0 73 StepLimit = dRoverRange*fRangeNow + r*(1.0 - dRoverRange)*(2.0 - r/fRangeNow);
72 //randomise this value 74 //randomise this value
73 if (rndmStepFlag) StepLimit = finalRange + 75 if (rndmStepFlag) StepLimit = finalRange + (StepLimit-finalRange)*G4UniformRand();
74 if (StepLimit > fRangeNow) StepLimit = fRa 76 if (StepLimit > fRangeNow) StepLimit = fRangeNow;
75 } 77 }
76 else StepLimit = fRangeNow; 78 else StepLimit = fRangeNow;
77 79
78 return StepLimit; 80 return StepLimit;
79 } 81 }
80 82
81 // 83 //
82 84
83 inline G4double G4eLowEnergyLoss::GetContinuou 85 inline G4double G4eLowEnergyLoss::GetContinuousStepLimit(
84 86 const G4Track& track,
85 87 G4double,
86 88 G4double currentMinimumStep,
87 89 G4double&)
88 { 90 {
89 91
90 G4double Step = 92 G4double Step =
91 GetConstraints(track.GetDynamicParticle(), 93 GetConstraints(track.GetDynamicParticle(),track.GetMaterialCutsCouple());
92 94
93 if ((Step>0.0)&&(Step<currentMinimumStep)) c 95 if ((Step>0.0)&&(Step<currentMinimumStep)) currentMinimumStep = Step;
94 96
95 return Step ; 97 return Step ;
96 } 98 }
97 99
98 // 100 //
99 inline G4bool G4eLowEnergyLoss::IsApplicable(c 101 inline G4bool G4eLowEnergyLoss::IsApplicable(const G4ParticleDefinition&
100 102 particle)
101 { 103 {
102 return( (&particle == G4Electron::Electron 104 return( (&particle == G4Electron::Electron())
103 ||(&particle == G4Positron::Positro 105 ||(&particle == G4Positron::Positron()) );
104 } 106 }
105 107
106 inline void G4eLowEnergyLoss::ActivateFluoresc 108 inline void G4eLowEnergyLoss::ActivateFluorescence(G4bool val)
107 { 109 {
108 theFluo = val; 110 theFluo = val;
109 } 111 }
110 112
111 inline G4bool G4eLowEnergyLoss::Fluorescence() 113 inline G4bool G4eLowEnergyLoss::Fluorescence() const
112 { 114 {
113 return theFluo; 115 return theFluo;
114 } 116 }
115 117
116 // 118 //
117 119
118 120