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28 //
29 // GEANT4 Class
30 //
31 // GEANT4 Class header file
32 //
33 // File name: G4MuonMinusAtomicCapture
34 //
35 // 20160912 K.L. Genser - New process using G4MuonicAtom somewhat
36 // based on G4HadronStoppingProcess
37 //
38 // Class Description:
39 //
40 // Stopping of mu-
41 //
42 // G4VParticleChange will contain gammas from G4EmCaptureCascade and
43 // resulting G4MuonicAtom
44 //
45 //
46 //------------------------------------------------------------------------
47
48 #include "G4MuonMinusAtomicCapture.hh"
49 #include "G4ParticleDefinition.hh"
50 #include "G4HadronicProcessType.hh"
51 #include "G4MuonMinusBoundDecay.hh"
52 #include "G4HadronicInteraction.hh"
53 #include "G4HadProjectile.hh"
54 #include "G4HadronicProcessStore.hh"
55 #include "G4EmCaptureCascade.hh"
56 #include "G4MuonMinus.hh"
57 #include "G4IonTable.hh"
58 #include "G4RandomDirection.hh"
59 #include "G4HadSecondary.hh"
60
61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
62
63 G4MuonMinusAtomicCapture::G4MuonMinusAtomicCapture(const G4String& name)
64 : G4VRestProcess(name, fHadronic),
65 fElementSelector(new G4ElementSelector()),
66 fEmCascade(new G4EmCaptureCascade()), // Owned by InteractionRegistry
67 theTotalResult(new G4ParticleChange()),
68 result(nullptr)
69 {
70 SetProcessSubType(fMuAtomicCapture);
71 G4HadronicProcessStore::Instance()->RegisterExtraProcess(this);
72 }
73
74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
75
76 G4MuonMinusAtomicCapture::~G4MuonMinusAtomicCapture()
77 {
78 G4HadronicProcessStore::Instance()->DeRegisterExtraProcess(this);
79 delete theTotalResult;
80 }
81
82 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
83
84 G4bool G4MuonMinusAtomicCapture::IsApplicable(const G4ParticleDefinition& p)
85 {
86 return (&p == G4MuonMinus::MuonMinus());
87 }
88 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
89
90 void
91 G4MuonMinusAtomicCapture::PreparePhysicsTable(const G4ParticleDefinition& p)
92 {
93 G4HadronicProcessStore::Instance()->RegisterParticleForExtraProcess(this,&p);
94 }
95
96 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
97
98 void G4MuonMinusAtomicCapture::BuildPhysicsTable(const G4ParticleDefinition& p)
99 {
100 G4HadronicProcessStore::Instance()->PrintInfo(&p);
101 }
102
103 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
104
105 G4double G4MuonMinusAtomicCapture::AtRestGetPhysicalInteractionLength(
106 const G4Track&, G4ForceCondition* condition)
107 {
108 *condition = NotForced;
109 return 0.0;
110 }
111
112 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
113
114 G4VParticleChange* G4MuonMinusAtomicCapture::AtRestDoIt(const G4Track& track,
115 const G4Step&)
116 {
117 // if primary is not Alive then do nothing (how?)
118 theTotalResult->Initialize(track);
119
120 G4Nucleus* nucleus = &targetNucleus;
121 // the call below actually sets the nucleus params;
122 // G4Nucleus targetNucleus; is a member of G4HadronicProcess
123 // G4Element* elm =
124 fElementSelector->SelectZandA(track, nucleus);
125
126 thePro.Initialise(track); // thePro was G4HadProjectile from G4HadronicProcess
127
128 // save track time an dstart capture from zero time
129 thePro.SetGlobalTime(0.0);
130 G4double time0 = track.GetGlobalTime();
131
132 // Do the electromagnetic cascade in the nuclear field.
133 // EM cascade should keep G4HadFinalState object,
134 // because it will not be deleted at the end of this method
135 //
136 result = fEmCascade->ApplyYourself(thePro, *nucleus);
137 G4double ebound = result->GetLocalEnergyDeposit(); // may need to carry this over; review
138 G4double edep = 0.0;
139 G4int nSecondaries = (G4int)result->GetNumberOfSecondaries();
140 thePro.SetBoundEnergy(ebound);
141
142 // creating the muonic atom
143 ++nSecondaries;
144
145 G4IonTable* itp = G4IonTable::GetIonTable();
146 G4ParticleDefinition* muonicAtom = itp->GetMuonicAtom(nucleus->GetZ_asInt(),
147 nucleus->GetA_asInt());
148
149 G4DynamicParticle* dp = new G4DynamicParticle(muonicAtom,G4RandomDirection(),0.);
150 G4HadSecondary hadSec(dp);
151 hadSec.SetTime(time0);
152 result->AddSecondary(hadSec);
153
154 // Fill results
155 //
156 theTotalResult->ProposeTrackStatus(fStopAndKill);
157 theTotalResult->ProposeLocalEnergyDeposit(edep);
158 theTotalResult->SetNumberOfSecondaries(nSecondaries);
159 G4double w = track.GetWeight();
160 theTotalResult->ProposeWeight(w);
161
162 #ifdef G4VERBOSE
163 if (GetVerboseLevel() > 1) {
164 G4cout << __func__
165 << " nSecondaries "
166 << nSecondaries
167 << G4endl;
168 }
169 #endif
170
171 for(G4int i=0; i<nSecondaries; ++i) {
172 G4HadSecondary* sec = result->GetSecondary(i);
173
174 // add track global time to the reaction time
175 G4double time = sec->GetTime();
176 if(time < 0.0) { time = 0.0; }
177 time += time0;
178
179 #ifdef G4VERBOSE
180 if (GetVerboseLevel() > 1) {
181 G4cout << __func__
182 << " "
183 << i
184 << " Resulting secondary "
185 << sec->GetParticle()->GetPDGcode()
186 << " "
187 << sec->GetParticle()->GetDefinition()->GetParticleName()
188 << G4endl;
189 }
190 #endif
191
192 // create secondary track
193 G4Track* t = new G4Track(sec->GetParticle(),
194 time,
195 track.GetPosition());
196 t->SetWeight(w*sec->GetWeight());
197
198 t->SetTouchableHandle(track.GetTouchableHandle());
199 theTotalResult->AddSecondary(t);
200 }
201 result->Clear();
202
203 // fixme: needs to be done at the MuonicAtom level
204 // if (epReportLevel != 0) { // G4HadronicProcess::
205 // CheckEnergyMomentumConservation(track, *nucleus);
206 // }
207 return theTotalResult;
208 }
209
210 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
211
212 void G4MuonMinusAtomicCapture::ProcessDescription(std::ostream& outFile) const
213 {
214 outFile << "Stopping of mu- using default element selector, EM cascade"
215 << "G4MuonicAtom is created\n";
216 }
217
218 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
219