| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // ------------------------------------------- 26 // --------------------------------------------------------------------
27 // 27 //
28 // 28 //
29 // Author: A. Forti 29 // Author: A. Forti
30 // Maria Grazia Pia (Maria.Grazia.Pia@ 30 // Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
31 // 31 //
32 // History: 32 // History:
33 // -------- 33 // --------
34 // Added Livermore data table construction met 34 // Added Livermore data table construction methods A. Forti
35 // Added BuildMeanFreePath A. Forti 35 // Added BuildMeanFreePath A. Forti
36 // Added PostStepDoIt A. Forti 36 // Added PostStepDoIt A. Forti
37 // Added SelectRandomAtom A. Forti 37 // Added SelectRandomAtom A. Forti
38 // Added map of the elements A.Forti 38 // Added map of the elements A.Forti
39 // 24.04.01 V.Ivanchenko remove RogueWave 39 // 24.04.01 V.Ivanchenko remove RogueWave
40 // 11.08.2001 MGP - Major revision according t 40 // 11.08.2001 MGP - Major revision according to a design iteration
41 // 06.10.2001 MGP - Added strategy to test ran 41 // 06.10.2001 MGP - Added strategy to test range for secondary generation
42 // 05.06.2002 F.Longo and G.Depaola - bug fix 42 // 05.06.2002 F.Longo and G.Depaola - bug fixed in angular distribution
43 // 20.10.2002 G. Depaola - Change sampling m 43 // 20.10.2002 G. Depaola - Change sampling method of theta
44 // 22.01.2003 V.Ivanchenko - Cut per region 44 // 22.01.2003 V.Ivanchenko - Cut per region
45 // 24.04.2003 V.Ivanchenko - Cut per region mf 45 // 24.04.2003 V.Ivanchenko - Cut per region mfpt
46 // 46 //
47 // ------------------------------------------- 47 // --------------------------------------------------------------------
48 48
49 #include "G4LowEnergyRayleigh.hh" 49 #include "G4LowEnergyRayleigh.hh"
50 #include "Randomize.hh" 50 #include "Randomize.hh"
51 #include "G4PhysicalConstants.hh" 51 #include "G4PhysicalConstants.hh"
52 #include "G4SystemOfUnits.hh" 52 #include "G4SystemOfUnits.hh"
53 #include "G4ParticleDefinition.hh" 53 #include "G4ParticleDefinition.hh"
54 #include "G4Track.hh" 54 #include "G4Track.hh"
55 #include "G4Step.hh" 55 #include "G4Step.hh"
56 #include "G4ForceCondition.hh" 56 #include "G4ForceCondition.hh"
57 #include "G4Gamma.hh" 57 #include "G4Gamma.hh"
58 #include "G4Electron.hh" 58 #include "G4Electron.hh"
59 #include "G4DynamicParticle.hh" 59 #include "G4DynamicParticle.hh"
60 #include "G4VParticleChange.hh" 60 #include "G4VParticleChange.hh"
61 #include "G4ThreeVector.hh" 61 #include "G4ThreeVector.hh"
62 #include "G4RDVCrossSectionHandler.hh" 62 #include "G4RDVCrossSectionHandler.hh"
63 #include "G4RDCrossSectionHandler.hh" 63 #include "G4RDCrossSectionHandler.hh"
64 #include "G4RDVEMDataSet.hh" 64 #include "G4RDVEMDataSet.hh"
65 #include "G4RDCompositeEMDataSet.hh" 65 #include "G4RDCompositeEMDataSet.hh"
66 #include "G4RDVDataSetAlgorithm.hh" 66 #include "G4RDVDataSetAlgorithm.hh"
67 #include "G4RDLogLogInterpolation.hh" 67 #include "G4RDLogLogInterpolation.hh"
68 68
69 #include "G4MaterialCutsCouple.hh" 69 #include "G4MaterialCutsCouple.hh"
70 70
71 G4LowEnergyRayleigh::G4LowEnergyRayleigh(const 71 G4LowEnergyRayleigh::G4LowEnergyRayleigh(const G4String& processName)
72 : G4VDiscreteProcess(processName), 72 : G4VDiscreteProcess(processName),
73 lowEnergyLimit(250*eV), 73 lowEnergyLimit(250*eV),
74 highEnergyLimit(100*GeV), 74 highEnergyLimit(100*GeV),
75 intrinsicLowEnergyLimit(10*eV), 75 intrinsicLowEnergyLimit(10*eV),
76 intrinsicHighEnergyLimit(100*GeV) 76 intrinsicHighEnergyLimit(100*GeV)
77 { 77 {
78 if (lowEnergyLimit < intrinsicLowEnergyLimit 78 if (lowEnergyLimit < intrinsicLowEnergyLimit ||
79 highEnergyLimit > intrinsicHighEnergyLim 79 highEnergyLimit > intrinsicHighEnergyLimit)
80 { 80 {
81 G4Exception("G4LowEnergyRayleigh::G4LowE 81 G4Exception("G4LowEnergyRayleigh::G4LowEnergyRayleigh()",
82 "OutOfRange", FatalException 82 "OutOfRange", FatalException,
83 "Energy limit outside intrin 83 "Energy limit outside intrinsic process validity range!");
84 } 84 }
85 85
86 crossSectionHandler = new G4RDCrossSectionHa 86 crossSectionHandler = new G4RDCrossSectionHandler();
87 87
88 G4RDVDataSetAlgorithm* ffInterpolation = new 88 G4RDVDataSetAlgorithm* ffInterpolation = new G4RDLogLogInterpolation;
89 G4String formFactorFile = "rayl/re-ff-"; 89 G4String formFactorFile = "rayl/re-ff-";
90 formFactorData = new G4RDCompositeEMDataSet( 90 formFactorData = new G4RDCompositeEMDataSet(ffInterpolation,1.,1.);
91 formFactorData->LoadData(formFactorFile); 91 formFactorData->LoadData(formFactorFile);
92 92
93 meanFreePathTable = 0; 93 meanFreePathTable = 0;
94 94
95 if (verboseLevel > 0) 95 if (verboseLevel > 0)
96 { 96 {
97 G4cout << GetProcessName() << " is crea 97 G4cout << GetProcessName() << " is created " << G4endl
98 << "Energy range: " 98 << "Energy range: "
99 << lowEnergyLimit / keV << " keV - " 99 << lowEnergyLimit / keV << " keV - "
100 << highEnergyLimit / GeV << " GeV" 100 << highEnergyLimit / GeV << " GeV"
101 << G4endl; 101 << G4endl;
102 } 102 }
103 } 103 }
104 104
105 G4LowEnergyRayleigh::~G4LowEnergyRayleigh() 105 G4LowEnergyRayleigh::~G4LowEnergyRayleigh()
106 { 106 {
107 delete meanFreePathTable; 107 delete meanFreePathTable;
108 delete crossSectionHandler; 108 delete crossSectionHandler;
109 delete formFactorData; 109 delete formFactorData;
110 } 110 }
111 111
112 void G4LowEnergyRayleigh::BuildPhysicsTable(co 112 void G4LowEnergyRayleigh::BuildPhysicsTable(const G4ParticleDefinition& )
113 { 113 {
114 114
115 crossSectionHandler->Clear(); 115 crossSectionHandler->Clear();
116 G4String crossSectionFile = "rayl/re-cs-"; 116 G4String crossSectionFile = "rayl/re-cs-";
117 crossSectionHandler->LoadData(crossSectionFi 117 crossSectionHandler->LoadData(crossSectionFile);
118 118
119 delete meanFreePathTable; 119 delete meanFreePathTable;
120 meanFreePathTable = crossSectionHandler->Bui 120 meanFreePathTable = crossSectionHandler->BuildMeanFreePathForMaterials();
121 } 121 }
122 122
123 G4VParticleChange* G4LowEnergyRayleigh::PostSt 123 G4VParticleChange* G4LowEnergyRayleigh::PostStepDoIt(const G4Track& aTrack,
124 const G4Step& aStep) 124 const G4Step& aStep)
125 { 125 {
126 126
127 aParticleChange.Initialize(aTrack); 127 aParticleChange.Initialize(aTrack);
128 128
129 const G4DynamicParticle* incidentPhoton = aT 129 const G4DynamicParticle* incidentPhoton = aTrack.GetDynamicParticle();
130 G4double photonEnergy0 = incidentPhoton->Get 130 G4double photonEnergy0 = incidentPhoton->GetKineticEnergy();
131 131
132 if (photonEnergy0 <= lowEnergyLimit) 132 if (photonEnergy0 <= lowEnergyLimit)
133 { 133 {
134 aParticleChange.ProposeTrackStatus(fStop 134 aParticleChange.ProposeTrackStatus(fStopAndKill);
135 aParticleChange.ProposeEnergy(0.); 135 aParticleChange.ProposeEnergy(0.);
136 aParticleChange.ProposeLocalEnergyDeposi 136 aParticleChange.ProposeLocalEnergyDeposit(photonEnergy0);
137 return G4VDiscreteProcess::PostStepDoIt( 137 return G4VDiscreteProcess::PostStepDoIt(aTrack,aStep);
138 } 138 }
139 139
140 // G4double e0m = photonEnergy0 / electron_ 140 // G4double e0m = photonEnergy0 / electron_mass_c2 ;
141 G4ParticleMomentum photonDirection0 = incide 141 G4ParticleMomentum photonDirection0 = incidentPhoton->GetMomentumDirection();
142 142
143 // Select randomly one element in the curren 143 // Select randomly one element in the current material
144 const G4MaterialCutsCouple* couple = aTrack. 144 const G4MaterialCutsCouple* couple = aTrack.GetMaterialCutsCouple();
145 G4int Z = crossSectionHandler->SelectRandomA 145 G4int Z = crossSectionHandler->SelectRandomAtom(couple,photonEnergy0);
146 146
147 // Sample the angle of the scattered photon 147 // Sample the angle of the scattered photon
148 148
149 G4double wlPhoton = h_Planck*c_light/photonE 149 G4double wlPhoton = h_Planck*c_light/photonEnergy0;
150 150
151 G4double gReject,x,dataFormFactor; 151 G4double gReject,x,dataFormFactor;
152 G4double randomFormFactor; 152 G4double randomFormFactor;
153 G4double cosTheta; 153 G4double cosTheta;
154 G4double sinTheta; 154 G4double sinTheta;
155 G4double fcostheta; 155 G4double fcostheta;
156 156
157 do 157 do
158 { 158 {
159 do 159 do
160 { 160 {
161 cosTheta = 2. * G4UniformRand() - 1.; 161 cosTheta = 2. * G4UniformRand() - 1.;
162 fcostheta = ( 1. + cosTheta*cosTheta)/2. 162 fcostheta = ( 1. + cosTheta*cosTheta)/2.;
163 } while (fcostheta < G4UniformRand()); 163 } while (fcostheta < G4UniformRand());
164 164
165 G4double sinThetaHalf = std::sqrt((1. - 165 G4double sinThetaHalf = std::sqrt((1. - cosTheta) / 2.);
166 x = sinThetaHalf / (wlPhoton/cm); 166 x = sinThetaHalf / (wlPhoton/cm);
167 if (x > 1.e+005) 167 if (x > 1.e+005)
168 dataFormFactor = formFactorData->Find 168 dataFormFactor = formFactorData->FindValue(x,Z-1);
169 else 169 else
170 dataFormFactor = formFactorData->Find 170 dataFormFactor = formFactorData->FindValue(0.,Z-1);
171 randomFormFactor = G4UniformRand() * Z * 171 randomFormFactor = G4UniformRand() * Z * Z;
172 sinTheta = std::sqrt(1. - cosTheta*cosTh 172 sinTheta = std::sqrt(1. - cosTheta*cosTheta);
173 gReject = dataFormFactor * dataFormFacto 173 gReject = dataFormFactor * dataFormFactor;
174 174
175 } while( gReject < randomFormFactor); 175 } while( gReject < randomFormFactor);
176 176
177 // Scattered photon angles. ( Z - axis along 177 // Scattered photon angles. ( Z - axis along the parent photon)
178 G4double phi = twopi * G4UniformRand() ; 178 G4double phi = twopi * G4UniformRand() ;
179 G4double dirX = sinTheta*std::cos(phi); 179 G4double dirX = sinTheta*std::cos(phi);
180 G4double dirY = sinTheta*std::sin(phi); 180 G4double dirY = sinTheta*std::sin(phi);
181 G4double dirZ = cosTheta; 181 G4double dirZ = cosTheta;
182 182
183 // Update G4VParticleChange for the scattere 183 // Update G4VParticleChange for the scattered photon
184 G4ThreeVector photonDirection1(dirX, dirY, d 184 G4ThreeVector photonDirection1(dirX, dirY, dirZ);
185 185
186 photonDirection1.rotateUz(photonDirection0); 186 photonDirection1.rotateUz(photonDirection0);
187 aParticleChange.ProposeEnergy(photonEnergy0) 187 aParticleChange.ProposeEnergy(photonEnergy0);
188 aParticleChange.ProposeMomentumDirection(pho 188 aParticleChange.ProposeMomentumDirection(photonDirection1);
189 189
190 aParticleChange.SetNumberOfSecondaries(0); 190 aParticleChange.SetNumberOfSecondaries(0);
191 191
192 return G4VDiscreteProcess::PostStepDoIt(aTra 192 return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
193 } 193 }
194 194
195 G4bool G4LowEnergyRayleigh::IsApplicable(const 195 G4bool G4LowEnergyRayleigh::IsApplicable(const G4ParticleDefinition& particle)
196 { 196 {
197 return ( &particle == G4Gamma::Gamma() ); 197 return ( &particle == G4Gamma::Gamma() );
198 } 198 }
199 199
200 G4double G4LowEnergyRayleigh::GetMeanFreePath( 200 G4double G4LowEnergyRayleigh::GetMeanFreePath(const G4Track& track,
201 G4double, // previousStepSize 201 G4double, // previousStepSize
202 G4ForceCondition*) 202 G4ForceCondition*)
203 { 203 {
204 const G4DynamicParticle* photon = track.GetD 204 const G4DynamicParticle* photon = track.GetDynamicParticle();
205 G4double energy = photon->GetKineticEnergy() 205 G4double energy = photon->GetKineticEnergy();
206 const G4MaterialCutsCouple* couple = track.G 206 const G4MaterialCutsCouple* couple = track.GetMaterialCutsCouple();
207 size_t materialIndex = couple->GetIndex(); 207 size_t materialIndex = couple->GetIndex();
208 208
209 G4double meanFreePath; 209 G4double meanFreePath;
210 if (energy > highEnergyLimit) meanFreePath = 210 if (energy > highEnergyLimit) meanFreePath = meanFreePathTable->FindValue(highEnergyLimit,materialIndex);
211 else if (energy < lowEnergyLimit) meanFreePa 211 else if (energy < lowEnergyLimit) meanFreePath = DBL_MAX;
212 else meanFreePath = meanFreePathTable->FindV 212 else meanFreePath = meanFreePathTable->FindValue(energy,materialIndex);
213 return meanFreePath; 213 return meanFreePath;
214 } 214 }
215 215