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25 //
26 //
27
28 // Created by Z. Francis
29
30 #include "G4DNAMeltonAttachmentModel.hh"
31 #include "G4SystemOfUnits.hh"
32 #include "G4DNAChemistryManager.hh"
33 #include "G4DNAMolecularMaterial.hh"
34
35 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
36
37 using namespace std;
38
39 //#define MELTON_VERBOSE // prevent checking conditions at run time
40
41 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
42
43 G4DNAMeltonAttachmentModel::G4DNAMeltonAttachmentModel(const G4ParticleDefinition*,
44 const G4String& nam) :
45 G4VEmModel(nam)
46 {
47 fpWaterDensity = nullptr;
48
49 SetLowEnergyLimit(4.*eV);
50 SetHighEnergyLimit(13.*eV);
51
52 verboseLevel = 0;
53 // Verbosity scale:
54 // 0 = nothing
55 // 1 = warning for energy non-conservation
56 // 2 = details of energy budget
57 // 3 = calculation of cross sections, file openings, sampling of atoms
58 // 4 = entering in methods
59
60 #ifdef MELTON_VERBOSE
61 if (verboseLevel > 0)
62 {
63 G4cout << "Melton Attachment model is constructed "
64 << G4endl
65 << "Energy range: "
66 << LowEnergyLimit() / eV << " eV - "
67 << HighEnergyLimit() / eV << " eV"
68 << G4endl;
69 }
70 #endif
71
72 fParticleChangeForGamma = nullptr;
73 fDissociationFlag = true;
74 fData = nullptr;
75
76 // Selection of stationary mode
77
78 statCode = false;
79 }
80
81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
82
83 G4DNAMeltonAttachmentModel::~G4DNAMeltonAttachmentModel()
84 {
85 delete fData;
86 }
87
88 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
89
90 void G4DNAMeltonAttachmentModel::Initialise(const G4ParticleDefinition* particle,
91 const G4DataVector& /*cuts*/)
92 {
93 #ifdef MELTON_VERBOSE
94 if (verboseLevel > 3)
95 G4cout
96 << "Calling G4DNAMeltonAttachmentModel::Initialise()" << G4endl;
97 #endif
98
99 // Only electron
100
101 if(particle->GetParticleName() != "e-")
102 {
103 G4Exception("G4DNAMeltonAttachmentModel::Initialise",
104 "em0002",
105 FatalException,
106 "Model not applicable to particle type.");
107 }
108
109 // Energy limits
110
111 if (LowEnergyLimit() < 4.*eV)
112 {
113 G4ExceptionDescription errMsg;
114 errMsg << "G4DNAMeltonAttachmentModel: low energy limit increased from " <<
115 LowEnergyLimit()/eV << " eV to " << 4. << " eV" << G4endl;
116
117 G4Exception("G4DNAMeltonAttachmentModel::Initialise",
118 "Melton_LowerEBoundary",
119 JustWarning,
120 errMsg);
121
122 SetLowEnergyLimit(4*eV);
123 }
124
125 if (HighEnergyLimit() > 13.*eV)
126 {
127 G4ExceptionDescription errMsg;
128 errMsg << "G4DNAMeltonAttachmentModel: high energy limit decreased from " <<
129 HighEnergyLimit()/eV << " eV to " << 13. << " eV" << G4endl;
130
131 G4Exception("G4DNAMeltonAttachmentModel::Initialise",
132 "Melton_HigherEBoundary",
133 JustWarning,
134 errMsg);
135
136 SetHighEnergyLimit(13.*eV);
137 }
138
139 // Reading of data files
140
141 G4double scaleFactor = 1e-18*cm2;
142
143 // For total cross section
144 G4String fileElectron("dna/sigma_attachment_e_melton");
145
146 fData = new G4DNACrossSectionDataSet(new G4LogLogInterpolation(),
147 eV, scaleFactor);
148 fData->LoadData(fileElectron);
149
150
151 #ifdef MELTON_VERBOSE
152 if( verboseLevel >0)
153 {
154 if (verboseLevel > 2)
155 {
156 G4cout << "Loaded cross section data for Melton Attachment model" << G4endl;
157 }
158
159 G4cout << "Melton Attachment model is initialized " << G4endl
160 << "Energy range: "
161 << LowEnergyLimit() / eV << " eV - "
162 << HighEnergyLimit() / eV << " eV"
163 << G4endl;
164 }
165 #endif
166
167 // Initialize water density pointer
168 fpWaterDensity = G4DNAMolecularMaterial::Instance()->
169 GetNumMolPerVolTableFor(G4Material::GetMaterial("G4_WATER"));
170
171 if (isInitialised) return;
172
173 fParticleChangeForGamma = GetParticleChangeForGamma();
174 isInitialised = true;
175 }
176
177 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
178
179 G4double
180 G4DNAMeltonAttachmentModel::CrossSectionPerVolume(const G4Material* material,
181 const G4ParticleDefinition*,
182 G4double ekin,
183 G4double,
184 G4double)
185 {
186 #ifdef MELTON_VERBOSE
187 if (verboseLevel > 3)
188 G4cout
189 << "Calling CrossSectionPerVolume() of G4DNAMeltonAttachmentModel"
190 << G4endl;
191 #endif
192
193 // Calculate total cross section for model
194
195 G4double sigma = 0.;
196
197 G4double waterDensity = (*fpWaterDensity)[material->GetIndex()];
198
199 if (ekin >= LowEnergyLimit() && ekin <= HighEnergyLimit())
200 sigma = fData->FindValue(ekin);
201
202 #ifdef MELTON_VERBOSE
203 if (verboseLevel > 2)
204 {
205 G4cout << "__________________________________" << G4endl;
206 G4cout << "=== G4DNAMeltonAttachmentModel - XS INFO START" << G4endl;
207 G4cout << "--- Kinetic energy(eV)=" << ekin/eV
208 << " particle : " << particleDefinition->GetParticleName()
209 << G4endl;
210 G4cout << "--- Cross section per water molecule (cm^2)="
211 << sigma/cm/cm << G4endl;
212 G4cout << "--- Cross section per water molecule (cm^-1)="
213 << sigma*waterDensity/(1./cm) << G4endl;
214 G4cout << "--- G4DNAMeltonAttachmentModel - XS INFO END" << G4endl;
215 }
216 #endif
217
218 return sigma*waterDensity;
219 }
220
221 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
222
223 void
224 G4DNAMeltonAttachmentModel::
225 SampleSecondaries(std::vector<G4DynamicParticle*>* /*fvect*/,
226 const G4MaterialCutsCouple* /*couple*/,
227 const G4DynamicParticle* aDynamicElectron,
228 G4double,
229 G4double)
230 {
231
232 #ifdef MELTON_VERBOSE
233 if (verboseLevel > 3)
234 G4cout
235 << "Calling SampleSecondaries() of G4DNAMeltonAttachmentModel" << G4endl;
236 #endif
237
238 // Electron is killed
239
240 G4double electronEnergy0 = aDynamicElectron->GetKineticEnergy();
241
242 if (!statCode)
243 {
244 fParticleChangeForGamma->SetProposedKineticEnergy(0.);
245 fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
246 fParticleChangeForGamma->ProposeLocalEnergyDeposit(electronEnergy0);
247 }
248
249 else
250 {
251 fParticleChangeForGamma->SetProposedKineticEnergy(electronEnergy0);
252 fParticleChangeForGamma->ProposeLocalEnergyDeposit(electronEnergy0);
253 }
254
255 if(fDissociationFlag)
256 {
257 G4DNAChemistryManager::Instance()->
258 CreateWaterMolecule(eDissociativeAttachment,
259 -1,
260 fParticleChangeForGamma->GetCurrentTrack());
261 }
262 return;
263 }
264