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25 //
26 //
27 //
28 //
29 // --------------------------------------------------------------
30 // GEANT 4 class implementation file
31 //
32 // ------------------------------------------------------------
33 //
34
35 #include "G4UnknownDecay.hh"
36
37 #include "G4PhysicalConstants.hh"
38 #include "G4SystemOfUnits.hh"
39 #include "G4DynamicParticle.hh"
40 #include "G4DecayProducts.hh"
41 #include "G4PhysicsLogVector.hh"
42 #include "G4ParticleChangeForDecay.hh"
43 #include "G4DecayProcessType.hh"
44
45 // constructor
46 G4UnknownDecay::G4UnknownDecay(const G4String& processName)
47 :G4VDiscreteProcess(processName, fDecay),
48 verboseLevel(1),
49 HighestValue(20.0)
50 {
51 // set Process Sub Type
52 SetProcessSubType(static_cast<int>(DECAY_Unknown));
53
54 #ifdef G4VERBOSE
55 if (GetVerboseLevel()>1) {
56 G4cout << "G4UnknownDecay constructor " << " Name:" << processName << G4endl;
57 }
58 #endif
59 pParticleChange = &fParticleChangeForDecay;
60 }
61
62 G4UnknownDecay::~G4UnknownDecay()
63 {
64 }
65
66 G4bool G4UnknownDecay::IsApplicable(const G4ParticleDefinition& aParticleType)
67 {
68 if(aParticleType.GetParticleName()=="unknown") return true;
69 return false;
70 }
71
72 G4double G4UnknownDecay::GetMeanFreePath(const G4Track& /*aTrack*/,G4double, G4ForceCondition*)
73 {
74 return 0.0;
75 }
76
77 void G4UnknownDecay::BuildPhysicsTable(const G4ParticleDefinition&)
78 {
79 return;
80 }
81
82 G4VParticleChange* G4UnknownDecay::DecayIt(const G4Track& aTrack, const G4Step& )
83 {
84 // The DecayIt() method returns by pointer a particle-change object.
85 // Units are expressed in GEANT4 internal units.
86
87 // Initialize ParticleChange
88 // all members of G4VParticleChange are set to equal to
89 // corresponding member in G4Track
90 fParticleChangeForDecay.Initialize(aTrack);
91
92 // get particle
93 const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
94
95 //check if thePreAssignedDecayProducts exists
96 const G4DecayProducts* o_products = (aParticle->GetPreAssignedDecayProducts());
97 G4bool isPreAssigned = (o_products != nullptr);
98 G4DecayProducts* products = nullptr;
99
100 if (!isPreAssigned ){
101 fParticleChangeForDecay.SetNumberOfSecondaries(0);
102 // Kill the parent particle
103 fParticleChangeForDecay.ProposeTrackStatus( fStopAndKill ) ;
104 fParticleChangeForDecay.ProposeLocalEnergyDeposit(0.0);
105
106 ClearNumberOfInteractionLengthLeft();
107 return &fParticleChangeForDecay ;
108 }
109
110 // copy decay products
111 products = new G4DecayProducts(*o_products);
112
113 // get parent particle information ...................................
114 G4double ParentEnergy = aParticle->GetTotalEnergy();
115 G4double ParentMass = aParticle->GetMass();
116 if (ParentEnergy < ParentMass) {
117 ParentEnergy = ParentMass;
118 #ifdef G4VERBOSE
119 if (GetVerboseLevel()>1) {
120 G4cout << "G4UnknownDecay::DoIt : Total Energy is less than its mass" << G4endl;
121 G4cout << " Particle: " << aParticle->GetDefinition()->GetParticleName();
122 G4cout << " Energy:" << ParentEnergy/MeV << "[MeV]";
123 G4cout << " Mass:" << ParentMass/MeV << "[MeV]";
124 G4cout << G4endl;
125 }
126 #endif
127 }
128 G4ThreeVector ParentDirection(aParticle->GetMomentumDirection());
129
130 G4double energyDeposit = 0.0;
131 G4double finalGlobalTime = aTrack.GetGlobalTime();
132 //boost all decay products to laboratory frame
133 //if the particle has traveled
134 if(aParticle->GetPreAssignedDecayProperTime()>=0.) {
135 products->Boost( ParentEnergy, ParentDirection);
136 }
137
138 //add products in fParticleChangeForDecay
139 G4int numberOfSecondaries = products->entries();
140 fParticleChangeForDecay.SetNumberOfSecondaries(numberOfSecondaries);
141 #ifdef G4VERBOSE
142 if (GetVerboseLevel()>1) {
143 G4cout << "G4UnknownDecay::DoIt : Decay vertex :";
144 G4cout << " Time: " << finalGlobalTime/ns << "[ns]";
145 G4cout << " X:" << (aTrack.GetPosition()).x() /cm << "[cm]";
146 G4cout << " Y:" << (aTrack.GetPosition()).y() /cm << "[cm]";
147 G4cout << " Z:" << (aTrack.GetPosition()).z() /cm << "[cm]";
148 G4cout << G4endl;
149 G4cout << "G4UnknownDecay::DoIt : decay products in Lab. Frame" << G4endl;
150 products->DumpInfo();
151 }
152 #endif
153 G4int index;
154 G4ThreeVector currentPosition;
155 const G4TouchableHandle thand = aTrack.GetTouchableHandle();
156 for (index=0; index < numberOfSecondaries; index++){
157 // get current position of the track
158 currentPosition = aTrack.GetPosition();
159 // create a new track object
160 G4Track* secondary = new G4Track( products->PopProducts(),
161 finalGlobalTime ,
162 currentPosition );
163 // switch on good for tracking flag
164 secondary->SetGoodForTrackingFlag();
165 secondary->SetTouchableHandle(thand);
166 // add the secondary track in the List
167 fParticleChangeForDecay.AddSecondary(secondary);
168 }
169 delete products;
170
171 // Kill the parent particle
172 fParticleChangeForDecay.ProposeTrackStatus( fStopAndKill ) ;
173 fParticleChangeForDecay.ProposeLocalEnergyDeposit(energyDeposit);
174 fParticleChangeForDecay.ProposeGlobalTime( finalGlobalTime );
175 // reset NumberOfInteractionLengthLeft
176 ClearNumberOfInteractionLengthLeft();
177
178 return &fParticleChangeForDecay ;
179 }
180
181 void G4UnknownDecay::ProcessDescription(std::ostream& outFile) const
182 {
183 outFile << GetProcessName()
184 << ": Decay of 'unknown' particles. \n"
185 << "kinematics of daughters are dertermined "
186 << "by PreAssignedDecayProducts. \n";
187 }
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