| Geant4 Cross Reference |
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25 //
26 //
27 // -------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 // File name: G4NuclearStopping
32 //
33 // Author: Vladimir Ivanchenko
34 //
35 // Creation date: 20 July 2009
36 //
37 // Modified:
38 //
39 // Warning: this class should be instantiated
40 //
41 // -------------------------------------------
42 //
43 //....oooOO0OOooo........oooOO0OOooo........oo
44 //....oooOO0OOooo........oooOO0OOooo........oo
45
46 #include "G4NuclearStopping.hh"
47 #include "G4ICRU49NuclearStoppingModel.hh"
48 #include "G4SystemOfUnits.hh"
49 #include "G4PhysicalConstants.hh"
50
51 //....oooOO0OOooo........oooOO0OOooo........oo
52
53 using namespace std;
54
55 G4NuclearStopping::G4NuclearStopping(const G4S
56 : G4VEmProcess(processName)
57 {
58 isInitialized = false;
59 SetProcessSubType(fNuclearStopping);
60 SetBuildTableFlag(false);
61 enableAlongStepDoIt = true;
62 enablePostStepDoIt = false;
63 }
64
65 //....oooOO0OOooo........oooOO0OOooo........oo
66
67 G4NuclearStopping::~G4NuclearStopping() = defa
68
69 //....oooOO0OOooo........oooOO0OOooo........oo
70
71 G4bool G4NuclearStopping::IsApplicable (const
72 {
73 return (p.GetPDGCharge() != 0.0);
74 }
75
76 //....oooOO0OOooo........oooOO0OOooo........oo
77
78 void G4NuclearStopping::InitialiseProcess(cons
79 {
80 if(!isInitialized) {
81 isInitialized = true;
82
83 if(nullptr == EmModel(0)) {
84 SetEmModel(new G4ICRU49NuclearStoppingMo
85 }
86 AddEmModel(1, EmModel());
87 EmModel()->SetActivationHighEnergyLimit(10
88 EmModel()->SetParticleChange(&nParticleCha
89 }
90 }
91
92 //....oooOO0OOooo........oooOO0OOooo........oo
93
94 G4double
95 G4NuclearStopping::AlongStepGetPhysicalInterac
96 const G4Track&, G4double, G4double, G4dou
97 {
98 *selection = NotCandidateForSelection;
99 return DBL_MAX;
100 }
101
102 //....oooOO0OOooo........oooOO0OOooo........oo
103
104 G4VParticleChange* G4NuclearStopping::AlongSte
105 const G4Step& step)
106 {
107 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
114
115 const G4ParticleDefinition* part = track.Get
116 G4double Z = std::abs(part->GetPDGCharge()/e
117 G4double massR = proton_mass_c2/part->GetPDG
118
119 if(T2 > 0.0 && T2*massR < Z*Z*MeV) {
120
121 G4double length = step.GetStepLength();
122 if(length > 0.0) {
123
124 // primary
125 G4double T1= step.GetPreStepPoint()->Get
126 G4double T = 0.5*(T1 + T2);
127 const G4MaterialCutsCouple* couple = tra
128 G4double Tscaled = T*massR;
129 G4VEmModel* mod = SelectModel(Tscaled, c
130
131 // sample stopping
132 if(mod->IsActive(Tscaled)) {
133 G4double nloss =
134 length*mod->ComputeDEDXPerVolume(couple->G
135 nloss = std::min(nloss, T1);
136 nParticleChange.SetProposedKineticEnergy(T1
137 nParticleChange.ProposeLocalEnergyDeposit(nl
138 nParticleChange.ProposeNonIonizingEnergyDepo
139 }
140 }
141 }
142 return &nParticleChange;
143 }
144
145 //....oooOO0OOooo........oooOO0OOooo........oo
146
147 void G4NuclearStopping::ProcessDescription(std
148 {
149 out << " Nuclear stopping";
150 G4VEmProcess::ProcessDescription(out);
151 }
152
153 //....oooOO0OOooo........oooOO0OOooo........oo
154