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>> 28 // $Id: G4LowEnergyRayleigh.cc 107396 2017-11-10 08:28:08Z gcosmo $
>> 29 // GEANT4 tag $Name: geant4-09-01-ref-00 $
28 // 30 //
29 // Author: A. Forti 31 // Author: A. Forti
30 // Maria Grazia Pia (Maria.Grazia.Pia@ 32 // Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
31 // 33 //
32 // History: 34 // History:
33 // -------- 35 // --------
34 // Added Livermore data table construction met 36 // Added Livermore data table construction methods A. Forti
35 // Added BuildMeanFreePath A. Forti 37 // Added BuildMeanFreePath A. Forti
36 // Added PostStepDoIt A. Forti 38 // Added PostStepDoIt A. Forti
37 // Added SelectRandomAtom A. Forti 39 // Added SelectRandomAtom A. Forti
38 // Added map of the elements A.Forti 40 // Added map of the elements A.Forti
39 // 24.04.01 V.Ivanchenko remove RogueWave 41 // 24.04.01 V.Ivanchenko remove RogueWave
40 // 11.08.2001 MGP - Major revision according t 42 // 11.08.2001 MGP - Major revision according to a design iteration
41 // 06.10.2001 MGP - Added strategy to test ran 43 // 06.10.2001 MGP - Added strategy to test range for secondary generation
42 // 05.06.2002 F.Longo and G.Depaola - bug fix 44 // 05.06.2002 F.Longo and G.Depaola - bug fixed in angular distribution
43 // 20.10.2002 G. Depaola - Change sampling m 45 // 20.10.2002 G. Depaola - Change sampling method of theta
44 // 22.01.2003 V.Ivanchenko - Cut per region 46 // 22.01.2003 V.Ivanchenko - Cut per region
45 // 24.04.2003 V.Ivanchenko - Cut per region mf 47 // 24.04.2003 V.Ivanchenko - Cut per region mfpt
46 // 48 //
47 // ------------------------------------------- 49 // --------------------------------------------------------------------
48 50
49 #include "G4LowEnergyRayleigh.hh" 51 #include "G4LowEnergyRayleigh.hh"
50 #include "Randomize.hh" 52 #include "Randomize.hh"
51 #include "G4PhysicalConstants.hh" 53 #include "G4PhysicalConstants.hh"
52 #include "G4SystemOfUnits.hh" 54 #include "G4SystemOfUnits.hh"
53 #include "G4ParticleDefinition.hh" 55 #include "G4ParticleDefinition.hh"
54 #include "G4Track.hh" 56 #include "G4Track.hh"
55 #include "G4Step.hh" 57 #include "G4Step.hh"
56 #include "G4ForceCondition.hh" 58 #include "G4ForceCondition.hh"
57 #include "G4Gamma.hh" 59 #include "G4Gamma.hh"
58 #include "G4Electron.hh" 60 #include "G4Electron.hh"
59 #include "G4DynamicParticle.hh" 61 #include "G4DynamicParticle.hh"
60 #include "G4VParticleChange.hh" 62 #include "G4VParticleChange.hh"
61 #include "G4ThreeVector.hh" 63 #include "G4ThreeVector.hh"
62 #include "G4RDVCrossSectionHandler.hh" 64 #include "G4RDVCrossSectionHandler.hh"
63 #include "G4RDCrossSectionHandler.hh" 65 #include "G4RDCrossSectionHandler.hh"
64 #include "G4RDVEMDataSet.hh" 66 #include "G4RDVEMDataSet.hh"
65 #include "G4RDCompositeEMDataSet.hh" 67 #include "G4RDCompositeEMDataSet.hh"
66 #include "G4RDVDataSetAlgorithm.hh" 68 #include "G4RDVDataSetAlgorithm.hh"
67 #include "G4RDLogLogInterpolation.hh" 69 #include "G4RDLogLogInterpolation.hh"
68 70
69 #include "G4MaterialCutsCouple.hh" 71 #include "G4MaterialCutsCouple.hh"
70 72
71 G4LowEnergyRayleigh::G4LowEnergyRayleigh(const 73 G4LowEnergyRayleigh::G4LowEnergyRayleigh(const G4String& processName)
72 : G4VDiscreteProcess(processName), 74 : G4VDiscreteProcess(processName),
73 lowEnergyLimit(250*eV), 75 lowEnergyLimit(250*eV),
74 highEnergyLimit(100*GeV), 76 highEnergyLimit(100*GeV),
75 intrinsicLowEnergyLimit(10*eV), 77 intrinsicLowEnergyLimit(10*eV),
76 intrinsicHighEnergyLimit(100*GeV) 78 intrinsicHighEnergyLimit(100*GeV)
77 { 79 {
78 if (lowEnergyLimit < intrinsicLowEnergyLimit 80 if (lowEnergyLimit < intrinsicLowEnergyLimit ||
79 highEnergyLimit > intrinsicHighEnergyLim 81 highEnergyLimit > intrinsicHighEnergyLimit)
80 { 82 {
81 G4Exception("G4LowEnergyRayleigh::G4LowE 83 G4Exception("G4LowEnergyRayleigh::G4LowEnergyRayleigh()",
82 "OutOfRange", FatalException 84 "OutOfRange", FatalException,
83 "Energy limit outside intrin 85 "Energy limit outside intrinsic process validity range!");
84 } 86 }
85 87
86 crossSectionHandler = new G4RDCrossSectionHa 88 crossSectionHandler = new G4RDCrossSectionHandler();
87 89
88 G4RDVDataSetAlgorithm* ffInterpolation = new 90 G4RDVDataSetAlgorithm* ffInterpolation = new G4RDLogLogInterpolation;
89 G4String formFactorFile = "rayl/re-ff-"; 91 G4String formFactorFile = "rayl/re-ff-";
90 formFactorData = new G4RDCompositeEMDataSet( 92 formFactorData = new G4RDCompositeEMDataSet(ffInterpolation,1.,1.);
91 formFactorData->LoadData(formFactorFile); 93 formFactorData->LoadData(formFactorFile);
92 94
93 meanFreePathTable = 0; 95 meanFreePathTable = 0;
94 96
95 if (verboseLevel > 0) 97 if (verboseLevel > 0)
96 { 98 {
97 G4cout << GetProcessName() << " is crea 99 G4cout << GetProcessName() << " is created " << G4endl
98 << "Energy range: " 100 << "Energy range: "
99 << lowEnergyLimit / keV << " keV - " 101 << lowEnergyLimit / keV << " keV - "
100 << highEnergyLimit / GeV << " GeV" 102 << highEnergyLimit / GeV << " GeV"
101 << G4endl; 103 << G4endl;
102 } 104 }
103 } 105 }
104 106
105 G4LowEnergyRayleigh::~G4LowEnergyRayleigh() 107 G4LowEnergyRayleigh::~G4LowEnergyRayleigh()
106 { 108 {
107 delete meanFreePathTable; 109 delete meanFreePathTable;
108 delete crossSectionHandler; 110 delete crossSectionHandler;
109 delete formFactorData; 111 delete formFactorData;
110 } 112 }
111 113
112 void G4LowEnergyRayleigh::BuildPhysicsTable(co 114 void G4LowEnergyRayleigh::BuildPhysicsTable(const G4ParticleDefinition& )
113 { 115 {
114 116
115 crossSectionHandler->Clear(); 117 crossSectionHandler->Clear();
116 G4String crossSectionFile = "rayl/re-cs-"; 118 G4String crossSectionFile = "rayl/re-cs-";
117 crossSectionHandler->LoadData(crossSectionFi 119 crossSectionHandler->LoadData(crossSectionFile);
118 120
119 delete meanFreePathTable; 121 delete meanFreePathTable;
120 meanFreePathTable = crossSectionHandler->Bui 122 meanFreePathTable = crossSectionHandler->BuildMeanFreePathForMaterials();
121 } 123 }
122 124
123 G4VParticleChange* G4LowEnergyRayleigh::PostSt 125 G4VParticleChange* G4LowEnergyRayleigh::PostStepDoIt(const G4Track& aTrack,
124 const G4Step& aStep) 126 const G4Step& aStep)
125 { 127 {
126 128
127 aParticleChange.Initialize(aTrack); 129 aParticleChange.Initialize(aTrack);
128 130
129 const G4DynamicParticle* incidentPhoton = aT 131 const G4DynamicParticle* incidentPhoton = aTrack.GetDynamicParticle();
130 G4double photonEnergy0 = incidentPhoton->Get 132 G4double photonEnergy0 = incidentPhoton->GetKineticEnergy();
131 133
132 if (photonEnergy0 <= lowEnergyLimit) 134 if (photonEnergy0 <= lowEnergyLimit)
133 { 135 {
134 aParticleChange.ProposeTrackStatus(fStop 136 aParticleChange.ProposeTrackStatus(fStopAndKill);
135 aParticleChange.ProposeEnergy(0.); 137 aParticleChange.ProposeEnergy(0.);
136 aParticleChange.ProposeLocalEnergyDeposi 138 aParticleChange.ProposeLocalEnergyDeposit(photonEnergy0);
137 return G4VDiscreteProcess::PostStepDoIt( 139 return G4VDiscreteProcess::PostStepDoIt(aTrack,aStep);
138 } 140 }
139 141
140 // G4double e0m = photonEnergy0 / electron_ 142 // G4double e0m = photonEnergy0 / electron_mass_c2 ;
141 G4ParticleMomentum photonDirection0 = incide 143 G4ParticleMomentum photonDirection0 = incidentPhoton->GetMomentumDirection();
142 144
143 // Select randomly one element in the curren 145 // Select randomly one element in the current material
144 const G4MaterialCutsCouple* couple = aTrack. 146 const G4MaterialCutsCouple* couple = aTrack.GetMaterialCutsCouple();
145 G4int Z = crossSectionHandler->SelectRandomA 147 G4int Z = crossSectionHandler->SelectRandomAtom(couple,photonEnergy0);
146 148
147 // Sample the angle of the scattered photon 149 // Sample the angle of the scattered photon
148 150
149 G4double wlPhoton = h_Planck*c_light/photonE 151 G4double wlPhoton = h_Planck*c_light/photonEnergy0;
150 152
151 G4double gReject,x,dataFormFactor; 153 G4double gReject,x,dataFormFactor;
152 G4double randomFormFactor; 154 G4double randomFormFactor;
153 G4double cosTheta; 155 G4double cosTheta;
154 G4double sinTheta; 156 G4double sinTheta;
155 G4double fcostheta; 157 G4double fcostheta;
156 158
157 do 159 do
158 { 160 {
159 do 161 do
160 { 162 {
161 cosTheta = 2. * G4UniformRand() - 1.; 163 cosTheta = 2. * G4UniformRand() - 1.;
162 fcostheta = ( 1. + cosTheta*cosTheta)/2. 164 fcostheta = ( 1. + cosTheta*cosTheta)/2.;
163 } while (fcostheta < G4UniformRand()); 165 } while (fcostheta < G4UniformRand());
164 166
165 G4double sinThetaHalf = std::sqrt((1. - 167 G4double sinThetaHalf = std::sqrt((1. - cosTheta) / 2.);
166 x = sinThetaHalf / (wlPhoton/cm); 168 x = sinThetaHalf / (wlPhoton/cm);
167 if (x > 1.e+005) 169 if (x > 1.e+005)
168 dataFormFactor = formFactorData->Find 170 dataFormFactor = formFactorData->FindValue(x,Z-1);
169 else 171 else
170 dataFormFactor = formFactorData->Find 172 dataFormFactor = formFactorData->FindValue(0.,Z-1);
171 randomFormFactor = G4UniformRand() * Z * 173 randomFormFactor = G4UniformRand() * Z * Z;
172 sinTheta = std::sqrt(1. - cosTheta*cosTh 174 sinTheta = std::sqrt(1. - cosTheta*cosTheta);
173 gReject = dataFormFactor * dataFormFacto 175 gReject = dataFormFactor * dataFormFactor;
174 176
175 } while( gReject < randomFormFactor); 177 } while( gReject < randomFormFactor);
176 178
177 // Scattered photon angles. ( Z - axis along 179 // Scattered photon angles. ( Z - axis along the parent photon)
178 G4double phi = twopi * G4UniformRand() ; 180 G4double phi = twopi * G4UniformRand() ;
179 G4double dirX = sinTheta*std::cos(phi); 181 G4double dirX = sinTheta*std::cos(phi);
180 G4double dirY = sinTheta*std::sin(phi); 182 G4double dirY = sinTheta*std::sin(phi);
181 G4double dirZ = cosTheta; 183 G4double dirZ = cosTheta;
182 184
183 // Update G4VParticleChange for the scattere 185 // Update G4VParticleChange for the scattered photon
184 G4ThreeVector photonDirection1(dirX, dirY, d 186 G4ThreeVector photonDirection1(dirX, dirY, dirZ);
185 187
186 photonDirection1.rotateUz(photonDirection0); 188 photonDirection1.rotateUz(photonDirection0);
187 aParticleChange.ProposeEnergy(photonEnergy0) 189 aParticleChange.ProposeEnergy(photonEnergy0);
188 aParticleChange.ProposeMomentumDirection(pho 190 aParticleChange.ProposeMomentumDirection(photonDirection1);
189 191
190 aParticleChange.SetNumberOfSecondaries(0); 192 aParticleChange.SetNumberOfSecondaries(0);
191 193
192 return G4VDiscreteProcess::PostStepDoIt(aTra 194 return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
193 } 195 }
194 196
195 G4bool G4LowEnergyRayleigh::IsApplicable(const 197 G4bool G4LowEnergyRayleigh::IsApplicable(const G4ParticleDefinition& particle)
196 { 198 {
197 return ( &particle == G4Gamma::Gamma() ); 199 return ( &particle == G4Gamma::Gamma() );
198 } 200 }
199 201
200 G4double G4LowEnergyRayleigh::GetMeanFreePath( 202 G4double G4LowEnergyRayleigh::GetMeanFreePath(const G4Track& track,
201 G4double, // previousStepSize 203 G4double, // previousStepSize
202 G4ForceCondition*) 204 G4ForceCondition*)
203 { 205 {
204 const G4DynamicParticle* photon = track.GetD 206 const G4DynamicParticle* photon = track.GetDynamicParticle();
205 G4double energy = photon->GetKineticEnergy() 207 G4double energy = photon->GetKineticEnergy();
206 const G4MaterialCutsCouple* couple = track.G 208 const G4MaterialCutsCouple* couple = track.GetMaterialCutsCouple();
207 size_t materialIndex = couple->GetIndex(); 209 size_t materialIndex = couple->GetIndex();
208 210
209 G4double meanFreePath; 211 G4double meanFreePath;
210 if (energy > highEnergyLimit) meanFreePath = 212 if (energy > highEnergyLimit) meanFreePath = meanFreePathTable->FindValue(highEnergyLimit,materialIndex);
211 else if (energy < lowEnergyLimit) meanFreePa 213 else if (energy < lowEnergyLimit) meanFreePath = DBL_MAX;
212 else meanFreePath = meanFreePathTable->FindV 214 else meanFreePath = meanFreePathTable->FindValue(energy,materialIndex);
213 return meanFreePath; 215 return meanFreePath;
214 } 216 }
215 217