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25 //
26 //
27 //---------------------------------------------------------------------------
28 //
29 // ClassName: G4URRNeutrons
30 //
31 // Author: Alberto Ribon - October 2024
32 //
33 // Description: Physics list constructor that can be applied on top of any
34 // _HP or _HPT based physics list.
35 // This class enables the special Unresolved Resonance Region
36 // (URR) treatment of low-energy neutrons based on Particle
37 // Table (PT).
38 // If this constructor is applied on top of a non-HP based
39 // physics list, then nothing is done (i.e. the physics list
40 // remains as it was originally, and a warning is printed out).
41 //
42 // Modified:
43 //
44 //----------------------------------------------------------------------------
45 //
46
47 #include "G4URRNeutrons.hh"
48 #include "G4ParticleDefinition.hh"
49 #include "G4ProcessManager.hh"
50 #include "G4HadronicProcess.hh"
51 #include "G4HadronicParameters.hh"
52 #include "G4ParticleHPElasticDataPT.hh"
53 #include "G4ParticleHPElasticURR.hh"
54 #include "G4ParticleHPCaptureDataPT.hh"
55 #include "G4ParticleHPCaptureURR.hh"
56 #include "G4ParticleHPFissionURR.hh"
57 #include "G4ParticleHPFissionDataPT.hh"
58 #include "G4ParticleHPInelasticDataPT.hh"
59 #include "G4ParticleHPInelasticURR.hh"
60 #include "G4BuilderType.hh"
61 #include "G4PhysListUtil.hh"
62 #include "G4SystemOfUnits.hh"
63
64 #include "G4PhysicsConstructorFactory.hh"
65 G4_DECLARE_PHYSCONSTR_FACTORY( G4URRNeutrons );
66
67
68 G4URRNeutrons::G4URRNeutrons( G4int ver ) : G4VHadronPhysics( "URRNeutrons", ver ) {}
69
70
71 G4URRNeutrons::~G4URRNeutrons() {}
72
73
74 void G4URRNeutrons::ConstructProcess() {
75 // Find elastic, capture, fission and inelastic processes of neutron
76 // (from the physics list on which this constructor is applied on top);
77 // then look at their hadronic final-state models in order to disable those that
78 // would otherwise fully overlap with the URR hadronic final-state models.
79 // Note that for disabling a hadronic model - not being defined the "DeRegister"
80 // method - it is enough to set to 0.0 the max energy of the model.
81
82 if ( G4HadronicParameters::Instance()->GetVerboseLevel() > 1 ) {
83 G4cout << "### " << GetPhysicsName() << " Construct Processes " << G4endl;
84 }
85 G4Neutron* part = G4Neutron::Neutron();
86
87 // Elastic (including, eventually, thermal scattering)
88 G4HadronicProcess* elasticProcess = G4PhysListUtil::FindElasticProcess( part );
89 if ( elasticProcess == nullptr ) {
90 G4cout << "### " << GetPhysicsName() << " WARNING: Fail to add URR neutron elastic treatment: "
91 << "NOT found elastic process => G4URRNeutrons returns without doing anything !" << G4endl;
92 return;
93 }
94 G4int niElastic = static_cast< G4int >( (elasticProcess->GetHadronicInteractionList()).size() );
95 if ( niElastic < 1 ) {
96 G4cout << "### " << GetPhysicsName() << " WARNING: Fail to add URR neutron elastic treatment: "
97 << "NOT found any elastic model => G4URRNeutrons returns without doing anything !" << G4endl;
98 return;
99 }
100 G4int indexHPelastic = -1;
101 G4int indexHPthermalScattering = -1;
102 for ( G4int index = 0; index < niElastic; ++index ) {
103 if ( (elasticProcess->GetHadronicInteractionList())[index]->GetModelName() == "NeutronHPElastic" ) {
104 indexHPelastic = index;
105 } else if ( (elasticProcess->GetHadronicInteractionList())[index]->GetModelName() == "NeutronHPThermalScattering" ) {
106 indexHPthermalScattering = index;
107 }
108 }
109 if ( indexHPelastic >= 0 ) {
110 (elasticProcess->GetHadronicInteractionList())[indexHPelastic]->SetMaxEnergy( 0.0 ); // Disabled
111 G4cout << G4endl << " G4URRNeutrons::ConstructProcess() : found NeutronHPElastic => Disabled !" << G4endl;
112 } else {
113 G4cout << "### " << GetPhysicsName()
114 << " WARNING: NOT found NeutronHPElastic => G4URRNeutrons returns without doing anything !" << G4endl;
115 return;
116 }
117 G4bool isThermalScatteringOn = false;
118 if ( indexHPthermalScattering > 0 ) isThermalScatteringOn = true;
119 elasticProcess->AddDataSet( new G4ParticleHPElasticDataPT );
120 elasticProcess->RegisterMe( new G4ParticleHPElasticURR( isThermalScatteringOn ) );
121
122 // Capture
123 G4HadronicProcess* captureProcess = G4PhysListUtil::FindCaptureProcess( part );
124 if ( captureProcess == nullptr ) {
125 G4cout << "### " << GetPhysicsName() << " WARNING: Fail to add URR neutron capture treatment: "
126 << "NOT found capture process => G4URRNeutrons returns without doing anything !" << G4endl;
127 return;
128 }
129 G4int niCapture = static_cast< G4int >( (captureProcess->GetHadronicInteractionList()).size() );
130 if ( niCapture < 1 ) {
131 G4cout << "### " << GetPhysicsName() << " WARNING: Fail to add URR neutron capture treatment: "
132 << "NOT found any capture model => G4URRNeutrons returns without doing anything !" << G4endl;
133 return;
134 }
135 G4int indexHPcapture = -1;
136 for ( G4int index = 0; index < niCapture; ++index ) {
137 // For QGSP_BERT_HP, since G4 11.2, the neutron capture model is called either "nRadCaptureHP"
138 // or "nuDEX_neutronCapture" (the latter when NuDEX is used).
139 G4String nameNeutronCaptureModel = (captureProcess->GetHadronicInteractionList())[index]->GetModelName();
140 if ( nameNeutronCaptureModel == "NeutronHPCapture" ||
141 nameNeutronCaptureModel == "nRadCaptureHP" ||
142 nameNeutronCaptureModel == "nuDEX_neutronCapture" ) {
143 indexHPcapture = index;
144 }
145 }
146 if ( indexHPcapture >= 0 ) {
147 (captureProcess->GetHadronicInteractionList())[indexHPcapture]->SetMaxEnergy( 0.0 ); // Disabled
148 G4cout << G4endl << " G4URRNeutrons::ConstructProcess() : found "
149 << (captureProcess->GetHadronicInteractionList())[indexHPcapture]->GetModelName()
150 << " => Disabled !" << G4endl;
151 } else {
152 G4cout << "### " << GetPhysicsName()
153 << " WARNING: NOT found any expected neutron capture model => G4URRNeutrons returns without doing anything !" << G4endl;
154 return;
155 }
156 captureProcess->AddDataSet( new G4ParticleHPCaptureDataPT );
157 captureProcess->RegisterMe( new G4ParticleHPCaptureURR );
158
159 // Fission
160 G4HadronicProcess* fissionProcess = G4PhysListUtil::FindFissionProcess( part );
161 if ( fissionProcess == nullptr ) {
162 G4cout << "### " << GetPhysicsName() << " WARNING: Fail to add URR neutron fission treatment: "
163 << "NOT found fission process => G4URRNeutrons returns without doing anything !" << G4endl;
164 return;
165 }
166 G4int niFission = static_cast< G4int >( (fissionProcess->GetHadronicInteractionList()).size() );
167 if ( niFission < 1 ) {
168 G4cout << "### " << GetPhysicsName() << " WARNING: Fail to add URR neutron fission treatment: "
169 << "NOT found any fission model => G4URRNeutrons returns without doing anything !" << G4endl;
170 return;
171 }
172 G4int indexHPfission = -1;
173 for ( G4int index = 0; index < niFission; ++index ) {
174 // For QGSP_BERT_HP, since G4 11.2, the neutron fission model is called "nFissionVI"
175 G4String nameNeutronFissionModel = (fissionProcess->GetHadronicInteractionList())[index]->GetModelName();
176 if ( nameNeutronFissionModel == "NeutronHPFission" || nameNeutronFissionModel == "nFissionVI" ) {
177 indexHPfission = index;
178 }
179 }
180 if ( indexHPfission >= 0 ) {
181 (fissionProcess->GetHadronicInteractionList())[indexHPfission]->SetMaxEnergy( 0.0 ); // Disabled
182 G4cout << G4endl << " G4URRNeutrons::ConstructProcess() : found "
183 << (fissionProcess->GetHadronicInteractionList())[indexHPfission]->GetModelName() // Disabled
184 << " => Disabled !" << G4endl;
185 } else {
186 G4cout << "### " << GetPhysicsName()
187 << " WARNING: NOT found any expected neutron fission model => G4URRNeutrons returns without doing anything !" << G4endl;
188 return;
189 }
190 fissionProcess->RegisterMe( new G4ParticleHPFissionURR );
191 fissionProcess->AddDataSet( new G4ParticleHPFissionDataPT );
192
193 // Inelastic
194 G4HadronicProcess* inelasticProcess = G4PhysListUtil::FindInelasticProcess( part );
195 if ( inelasticProcess == nullptr ) {
196 G4cout << "### " << GetPhysicsName() << " WARNING: Fail to add URR neutron inelastic treatment: "
197 << "NOT found inelastic process => G4URRNeutrons returns without doing anything !" << G4endl;
198 return;
199 }
200 G4int niInelastic = static_cast< G4int >( (inelasticProcess->GetHadronicInteractionList()).size() );
201 if ( niInelastic < 1 ) {
202 G4cout << "### " << GetPhysicsName() << " WARNING: Fail to add URR neutron inelastic treatment: "
203 << "NOT found any inelastic model => G4URRNeutrons returns without doing anything !" << G4endl;
204 return;
205 }
206 G4int indexHPinelastic = -1;
207 for ( G4int index = 0; index < niInelastic; ++index ) {
208 if ( (inelasticProcess->GetHadronicInteractionList())[index]->GetModelName() == "NeutronHPInelastic" ) {
209 indexHPinelastic = index;
210 }
211 }
212 if ( indexHPinelastic >= 0 ) {
213 (inelasticProcess->GetHadronicInteractionList())[indexHPinelastic]->SetMaxEnergy( 0.0 ); // Disabled
214 G4cout << G4endl << " G4URRNeutrons::ConstructProcess() : found NeutronHPInelastic => Disabled !" << G4endl;
215 } else {
216 G4cout << "### " << GetPhysicsName()
217 << " WARNING: NOT found NeutronHPInelastic => G4URRNeutrons returns without doing anything !" << G4endl;
218 return;
219 }
220 inelasticProcess->AddDataSet( new G4ParticleHPInelasticDataPT );
221 inelasticProcess->RegisterMe( new G4ParticleHPInelasticURR );
222 }
223