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25 // 25 //
>> 26 // $Id$
26 // 27 //
27 // ------------------------------------------- 28 // -----------------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class file 30 // GEANT4 Class file
30 // 31 //
31 // File name: G4NuclearStopping 32 // File name: G4NuclearStopping
32 // 33 //
33 // Author: Vladimir Ivanchenko 34 // Author: Vladimir Ivanchenko
34 // 35 //
35 // Creation date: 20 July 2009 36 // Creation date: 20 July 2009
36 // 37 //
37 // Modified: 38 // Modified:
38 // 39 //
39 // Warning: this class should be instantiated <<
40 // <<
41 // ------------------------------------------- 40 // -----------------------------------------------------------------------------
42 // 41 //
43 //....oooOO0OOooo........oooOO0OOooo........oo 42 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
44 //....oooOO0OOooo........oooOO0OOooo........oo 43 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
45 44
46 #include "G4NuclearStopping.hh" 45 #include "G4NuclearStopping.hh"
47 #include "G4ICRU49NuclearStoppingModel.hh" 46 #include "G4ICRU49NuclearStoppingModel.hh"
48 #include "G4SystemOfUnits.hh" 47 #include "G4SystemOfUnits.hh"
49 #include "G4PhysicalConstants.hh" 48 #include "G4PhysicalConstants.hh"
50 49
51 //....oooOO0OOooo........oooOO0OOooo........oo 50 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
52 51
53 using namespace std; 52 using namespace std;
54 53
55 G4NuclearStopping::G4NuclearStopping(const G4S 54 G4NuclearStopping::G4NuclearStopping(const G4String& processName)
56 : G4VEmProcess(processName) 55 : G4VEmProcess(processName)
57 { 56 {
58 isInitialized = false; 57 isInitialized = false;
59 SetProcessSubType(fNuclearStopping); 58 SetProcessSubType(fNuclearStopping);
60 SetBuildTableFlag(false); 59 SetBuildTableFlag(false);
61 enableAlongStepDoIt = true; 60 enableAlongStepDoIt = true;
62 enablePostStepDoIt = false; 61 enablePostStepDoIt = false;
>> 62 modelICRU49 = 0;
63 } 63 }
64 64
65 //....oooOO0OOooo........oooOO0OOooo........oo 65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
66 66
67 G4NuclearStopping::~G4NuclearStopping() = defa << 67 G4NuclearStopping::~G4NuclearStopping()
>> 68 {}
68 69
69 //....oooOO0OOooo........oooOO0OOooo........oo 70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
70 71
71 G4bool G4NuclearStopping::IsApplicable (const 72 G4bool G4NuclearStopping::IsApplicable (const G4ParticleDefinition& p)
72 { 73 {
73 return (p.GetPDGCharge() != 0.0); << 74 return (p.GetPDGCharge() != 0.0 && !p.IsShortLived());
74 } 75 }
75 76
76 //....oooOO0OOooo........oooOO0OOooo........oo 77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
77 78
78 void G4NuclearStopping::InitialiseProcess(cons 79 void G4NuclearStopping::InitialiseProcess(const G4ParticleDefinition*)
79 { 80 {
80 if(!isInitialized) { 81 if(!isInitialized) {
81 isInitialized = true; 82 isInitialized = true;
82 83
83 if(nullptr == EmModel(0)) { << 84 if(!EmModel(1)) {
84 SetEmModel(new G4ICRU49NuclearStoppingMo << 85 modelICRU49 = new G4ICRU49NuclearStoppingModel();
>> 86 SetEmModel(modelICRU49);
85 } 87 }
86 AddEmModel(1, EmModel()); 88 AddEmModel(1, EmModel());
87 EmModel()->SetActivationHighEnergyLimit(10 <<
88 EmModel()->SetParticleChange(&nParticleCha 89 EmModel()->SetParticleChange(&nParticleChange);
89 } 90 }
90 } 91 }
91 92
92 //....oooOO0OOooo........oooOO0OOooo........oo 93 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
93 94
94 G4double 95 G4double
95 G4NuclearStopping::AlongStepGetPhysicalInterac 96 G4NuclearStopping::AlongStepGetPhysicalInteractionLength(
96 const G4Track&, G4double, G4double, G4dou 97 const G4Track&, G4double, G4double, G4double&, G4GPILSelection* selection)
97 { 98 {
98 *selection = NotCandidateForSelection; 99 *selection = NotCandidateForSelection;
99 return DBL_MAX; 100 return DBL_MAX;
100 } 101 }
101 102
102 //....oooOO0OOooo........oooOO0OOooo........oo 103 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
103 104
104 G4VParticleChange* G4NuclearStopping::AlongSte 105 G4VParticleChange* G4NuclearStopping::AlongStepDoIt(const G4Track& track,
105 const G4Step& step) 106 const G4Step& step)
106 { 107 {
107 nParticleChange.InitializeForAlongStep(track 108 nParticleChange.InitializeForAlongStep(track);
108 <<
109 // this line only valid if nuclear stopping <<
110 // is computed after G4ionIonisation process <<
111 nParticleChange.SetProposedCharge(step.GetPo <<
112 <<
113 G4double T2 = step.GetPostStepPoint()->GetKi 109 G4double T2 = step.GetPostStepPoint()->GetKineticEnergy();
114 110
115 const G4ParticleDefinition* part = track.Get 111 const G4ParticleDefinition* part = track.GetParticleDefinition();
116 G4double Z = std::abs(part->GetPDGCharge()/e << 112 G4double Z = std::fabs(part->GetPDGCharge()/eplus);
117 G4double massR = proton_mass_c2/part->GetPDG <<
118 113
119 if(T2 > 0.0 && T2*massR < Z*Z*MeV) { << 114 if(T2 > 0.0 && T2*proton_mass_c2 < Z*Z*MeV*part->GetPDGMass()) {
120 115
121 G4double length = step.GetStepLength(); 116 G4double length = step.GetStepLength();
122 if(length > 0.0) { 117 if(length > 0.0) {
123 118
124 // primary 119 // primary
125 G4double T1= step.GetPreStepPoint()->Get 120 G4double T1= step.GetPreStepPoint()->GetKineticEnergy();
126 G4double T = 0.5*(T1 + T2); 121 G4double T = 0.5*(T1 + T2);
127 const G4MaterialCutsCouple* couple = tra 122 const G4MaterialCutsCouple* couple = track.GetMaterialCutsCouple();
128 G4double Tscaled = T*massR; << 123 G4VEmModel* mod = SelectModel(T, couple->GetIndex());
129 G4VEmModel* mod = SelectModel(Tscaled, c <<
130 124
131 // sample stopping 125 // sample stopping
132 if(mod->IsActive(Tscaled)) { << 126 if(modelICRU49) { modelICRU49->SetFluctuationFlag(true); }
133 G4double nloss = << 127 G4double nloss =
134 length*mod->ComputeDEDXPerVolume(couple->G << 128 length*mod->ComputeDEDXPerVolume(couple->GetMaterial(), part, T);
135 nloss = std::min(nloss, T1); << 129 if(nloss > T1) { nloss = T1; }
136 nParticleChange.SetProposedKineticEnergy(T1 << 130 nParticleChange.SetProposedKineticEnergy(T1 - nloss);
137 nParticleChange.ProposeLocalEnergyDeposit(nl << 131 nParticleChange.ProposeLocalEnergyDeposit(nloss);
138 nParticleChange.ProposeNonIonizingEnergyDepo << 132 nParticleChange.ProposeNonIonizingEnergyDeposit(nloss);
139 } << 133 if(modelICRU49) { modelICRU49->SetFluctuationFlag(false); }
140 } 134 }
141 } 135 }
142 return &nParticleChange; 136 return &nParticleChange;
143 } 137 }
144 138
145 //....oooOO0OOooo........oooOO0OOooo........oo 139 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
146 140
147 void G4NuclearStopping::ProcessDescription(std << 141 void G4NuclearStopping::PrintInfo()
148 { << 142 {}
149 out << " Nuclear stopping"; << 143
150 G4VEmProcess::ProcessDescription(out); << 144 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
151 } <<
152 145
153 //....oooOO0OOooo........oooOO0OOooo........oo <<
154 146