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1 // 1 //
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25 // 25 //
26 // 26 //
27 // 27 //
28 // ------------------------------------------- 28 // ---------------------------------------------------------------
29 // GEANT 4 class inlined methods file 29 // GEANT 4 class inlined methods file
30 // 30 //
31 // History: based on object model of 31 // History: based on object model of
32 // 2nd December 1995, G.Cosmo 32 // 2nd December 1995, G.Cosmo
33 // ------------ G4eLowEnergyLoss physics 33 // ------------ G4eLowEnergyLoss physics process ------------
34 // by Laszlo Urban, 20 March 34 // by Laszlo Urban, 20 March 1997
35 // ******************************************* 35 // ***************************************************************
36 // It is the first implementation of the NEW U 36 // It is the first implementation of the NEW UNIFIED ENERGY LOSS PROCESS.
37 // It calculates the energy loss of e+/e-. 37 // It calculates the energy loss of e+/e-.
38 // ------------------------------------------- 38 // -------------------------------------------------------------
39 // 39 //
40 // 08-09-98 cleanup 40 // 08-09-98 cleanup
41 // 28-03-02 V.Ivanchenko add fluorescence fla 41 // 28-03-02 V.Ivanchenko add fluorescence flag
42 // 21-01-03 V.Ivanchenko cut per region 42 // 21-01-03 V.Ivanchenko cut per region
43 // 18-04-03 V.Ivanchenko finalRange redefinit 43 // 18-04-03 V.Ivanchenko finalRange redefinition
44 // 44 //
45 // ------------------------------------------- 45 // ---------------------------------------------------------------
46 46
47 inline G4double G4eLowEnergyLoss::GetConstrain 47 inline G4double G4eLowEnergyLoss::GetConstraints(
48 const G4 48 const G4DynamicParticle* aParticle,
49 const G4 49 const G4MaterialCutsCouple* couple)
50 { 50 {
51 G4double StepLimit; 51 G4double StepLimit;
52 // returns the Step limit 52 // returns the Step limit
53 // dRoverRange is the max. allowed relative 53 // dRoverRange is the max. allowed relative range loss in one Step
54 // it calculates dEdx and the range as well. 54 // it calculates dEdx and the range as well....
55 55
56 const G4ParticleDefinition* ParticleType=aPa 56 const G4ParticleDefinition* ParticleType=aParticle->GetDefinition();
57 57
58 Charge = aParticle->GetDefinition()->GetPDGC 58 Charge = aParticle->GetDefinition()->GetPDGCharge();
59 if(Charge != lastCharge) lastCharge = Charge 59 if(Charge != lastCharge) lastCharge = Charge ;
60 60
61 G4double KineticEnergy = aParticle->GetKinet 61 G4double KineticEnergy = aParticle->GetKineticEnergy();
62 62
63 fdEdx = G4EnergyLossTables::GetDEDX(Particle 63 fdEdx = G4EnergyLossTables::GetDEDX(ParticleType,KineticEnergy,couple);
64 fRangeNow = 64 fRangeNow =
65 G4EnergyLossTables::GetRange(Partic 65 G4EnergyLossTables::GetRange(ParticleType,KineticEnergy,couple);
66 66
67 G4double r = std::min(finalRange, couple->Ge 67 G4double r = std::min(finalRange, couple->GetProductionCuts()
68 ->GetProductionCut(idxG4Elect 68 ->GetProductionCut(idxG4ElectronCut));
69 69
70 if (fRangeNow > r) { 70 if (fRangeNow > r) {
71 StepLimit = dRoverRange*fRangeNow + r*(1.0 71 StepLimit = dRoverRange*fRangeNow + r*(1.0 - dRoverRange)*(2.0 - r/fRangeNow);
72 //randomise this value 72 //randomise this value
73 if (rndmStepFlag) StepLimit = finalRange + 73 if (rndmStepFlag) StepLimit = finalRange + (StepLimit-finalRange)*G4UniformRand();
74 if (StepLimit > fRangeNow) StepLimit = fRa 74 if (StepLimit > fRangeNow) StepLimit = fRangeNow;
75 } 75 }
76 else StepLimit = fRangeNow; 76 else StepLimit = fRangeNow;
77 77
78 return StepLimit; 78 return StepLimit;
79 } 79 }
80 80
81 // 81 //
82 82
83 inline G4double G4eLowEnergyLoss::GetContinuou 83 inline G4double G4eLowEnergyLoss::GetContinuousStepLimit(
84 84 const G4Track& track,
85 85 G4double,
86 86 G4double currentMinimumStep,
87 87 G4double&)
88 { 88 {
89 89
90 G4double Step = 90 G4double Step =
91 GetConstraints(track.GetDynamicParticle(), 91 GetConstraints(track.GetDynamicParticle(),track.GetMaterialCutsCouple());
92 92
93 if ((Step>0.0)&&(Step<currentMinimumStep)) c 93 if ((Step>0.0)&&(Step<currentMinimumStep)) currentMinimumStep = Step;
94 94
95 return Step ; 95 return Step ;
96 } 96 }
97 97
98 // 98 //
99 inline G4bool G4eLowEnergyLoss::IsApplicable(c 99 inline G4bool G4eLowEnergyLoss::IsApplicable(const G4ParticleDefinition&
100 100 particle)
101 { 101 {
102 return( (&particle == G4Electron::Electron 102 return( (&particle == G4Electron::Electron())
103 ||(&particle == G4Positron::Positro 103 ||(&particle == G4Positron::Positron()) );
104 } 104 }
105 105
106 inline void G4eLowEnergyLoss::ActivateFluoresc 106 inline void G4eLowEnergyLoss::ActivateFluorescence(G4bool val)
107 { 107 {
108 theFluo = val; 108 theFluo = val;
109 } 109 }
110 110
111 inline G4bool G4eLowEnergyLoss::Fluorescence() 111 inline G4bool G4eLowEnergyLoss::Fluorescence() const
112 { 112 {
113 return theFluo; 113 return theFluo;
114 } 114 }
115 115
116 // 116 //
117 117
118 118