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>> 26 // $Id: G4CoulombScattering.cc,v 1.28 2010-05-25 18:41:12 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-09-04-patch-01 $
26 // 28 //
27 // ------------------------------------------- 29 // -------------------------------------------------------------------
28 // 30 //
29 // GEANT4 Class file 31 // GEANT4 Class file
30 // 32 //
31 // 33 //
32 // File name: G4CoulombScattering 34 // File name: G4CoulombScattering
33 // 35 //
34 // Author: Vladimir Ivanchenko 36 // Author: Vladimir Ivanchenko
35 // 37 //
36 // Creation date: 22.08.2004 38 // Creation date: 22.08.2004
37 // 39 //
38 // Modifications: 40 // Modifications:
39 // 01.08.06 V.Ivanchenko add choice between G4 41 // 01.08.06 V.Ivanchenko add choice between G4eCoulombScatteringModel and
40 // G4CoulombScatteringModel 42 // G4CoulombScatteringModel
41 // 43 //
42 44
43 // 45 //
44 // ------------------------------------------- 46 // -------------------------------------------------------------------
45 // 47 //
46 //....oooOO0OOooo........oooOO0OOooo........oo 48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
47 //....oooOO0OOooo........oooOO0OOooo........oo 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
48 50
49 #include "G4CoulombScattering.hh" 51 #include "G4CoulombScattering.hh"
50 #include "G4SystemOfUnits.hh" << 52 #include "G4CoulombScatteringModel.hh"
51 #include "G4eCoulombScatteringModel.hh" 53 #include "G4eCoulombScatteringModel.hh"
52 #include "G4IonCoulombScatteringModel.hh" << 54 //#include "G4hCoulombScatteringModel.hh"
>> 55 #include "G4Electron.hh"
53 #include "G4Proton.hh" 56 #include "G4Proton.hh"
54 #include "G4EmParameters.hh" << 57 #include "G4LossTableManager.hh"
55 58
56 //....oooOO0OOooo........oooOO0OOooo........oo 59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
57 60
58 G4CoulombScattering::G4CoulombScattering(const << 61 using namespace std;
59 : G4VEmProcess(nam), << 62
60 q2Max(CLHEP::TeV*CLHEP::TeV), << 63 G4CoulombScattering::G4CoulombScattering(const G4String& name)
61 isCombined(comb) << 64 : G4VEmProcess(name),thetaMin(0.0),thetaMax(pi),q2Max(TeV*TeV),
>> 65 isInitialised(false)
62 { 66 {
>> 67 // G4cout << "G4CoulombScattering constructor "<< G4endl;
63 SetBuildTableFlag(true); 68 SetBuildTableFlag(true);
64 SetStartFromNullFlag(false); 69 SetStartFromNullFlag(false);
65 SetSplineFlag(false); << 70 SetIntegral(true);
66 SetCrossSectionType(fEmOnePeak); << 71 thEnergy = PeV;
67 SetSecondaryParticle(G4Proton::Proton()); << 72 thEnergyElec = PeV;
>> 73 if(name == "CoulombScat") {
>> 74 thEnergy = 10.*MeV;
>> 75 thEnergyElec = 10.*GeV;
>> 76 }
>> 77 SetSecondaryParticle(G4Electron::Electron());
68 SetProcessSubType(fCoulombScattering); 78 SetProcessSubType(fCoulombScattering);
69 } 79 }
70 80
71 //....oooOO0OOooo........oooOO0OOooo........oo 81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
72 82
73 G4CoulombScattering::G4CoulombScattering(const << 83 G4CoulombScattering::~G4CoulombScattering()
74 : G4CoulombScattering(nam, true) <<
75 {} <<
76 <<
77 //....oooOO0OOooo........oooOO0OOooo........oo <<
78 <<
79 G4CoulombScattering::G4CoulombScattering(G4boo <<
80 : G4CoulombScattering("CoulombScat", comb) <<
81 {} 84 {}
82 <<
83 //....oooOO0OOooo........oooOO0OOooo........oo <<
84 <<
85 G4CoulombScattering::~G4CoulombScattering() = <<
86 85
87 //....oooOO0OOooo........oooOO0OOooo........oo 86 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
88 87
89 G4bool G4CoulombScattering::IsApplicable(const 88 G4bool G4CoulombScattering::IsApplicable(const G4ParticleDefinition& p)
90 { 89 {
91 return (p.GetPDGCharge() != 0.0); << 90 return (p.GetPDGCharge() != 0.0 && !p.IsShortLived());
92 } 91 }
93 92
94 //....oooOO0OOooo........oooOO0OOooo........oo 93 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
95 94
96 void G4CoulombScattering::InitialiseProcess(co 95 void G4CoulombScattering::InitialiseProcess(const G4ParticleDefinition* p)
97 { 96 {
98 // second initialisation not allowed for the << 97 //G4cout << "### G4CoulombScattering::InitialiseProcess : "
99 // this means that polar angle limit change << 98 // << p->GetParticleName() << G4endl;
100 // after first initialisation << 99 G4double a =
101 if(isInitialised) { return; } << 100 G4LossTableManager::Instance()->FactorForAngleLimit()*CLHEP::hbarc/CLHEP::fermi;
102 <<
103 G4EmParameters* param = G4EmParameters::Inst <<
104 G4double a = param->FactorForAngleLimit()*CL <<
105 q2Max = 0.5*a*a; 101 q2Max = 0.5*a*a;
106 G4double theta = param->MscThetaLimit(); << 102
>> 103 // second initialisation
>> 104 if(isInitialised) {
>> 105 G4VEmModel* mod = GetModelByIndex(0);
>> 106 mod->SetPolarAngleLimit(PolarAngleLimit());
>> 107 mod = GetModelByIndex(1);
>> 108 if(mod) { mod->SetPolarAngleLimit(PolarAngleLimit()); }
107 109
108 // restricted or non-restricted cross sectio << 110 // first initialisation
109 if(isCombined) { <<
110 if(theta == CLHEP::pi) { <<
111 // for restriced single scattering chang <<
112 SetCrossSectionType(fEmIncreasing); <<
113 SetStartFromNullFlag(true); <<
114 } <<
115 } else { 111 } else {
116 SetSplineFlag(true); << 112 isInitialised = true;
117 SetCrossSectionType(fEmDecreasing); << 113 aParticle = p;
118 } << 114 G4double mass = p->GetPDGMass();
119 isInitialised = true; << 115 G4String name = p->GetParticleName();
120 G4double mass = p->GetPDGMass(); << 116 //G4cout << name << " type: " << p->GetParticleType()
121 G4String name = p->GetParticleName(); << 117 //<< " mass= " << mass << G4endl;
122 << 118 if (mass > GeV || p->GetParticleType() == "nucleus") {
123 G4bool ion = false; << 119 SetBuildTableFlag(false);
124 if (mass > CLHEP::GeV || p->GetParticleType( << 120 if(name != "GenericIon") { SetVerboseLevel(0); }
125 SetBuildTableFlag(false); << 121 } else {
126 ion = true; << 122 if(name != "e-" && name != "e+" &&
127 if(name != "GenericIon") { SetVerboseLevel << 123 name != "mu+" && name != "mu-" && name != "pi+" &&
128 } else { << 124 name != "kaon+" && name != "proton" ) { SetVerboseLevel(0); }
129 if(name != "e-" && name != "e+" && << 125 }
130 name != "mu+" && name != "mu-" && name <<
131 name != "kaon+" && name != "proton" ) { <<
132 } <<
133 /* <<
134 G4cout << "### G4CoulombScattering::Initiali <<
135 << p->GetParticleName() <<
136 << " Emin(MeV)= " << MinKinEnergy()/MeV <<
137 << " Emax(TeV)= " << MaxKinEnergy()/TeV <<
138 << " nbins= " << LambdaBinning() <<
139 << " theta= " << theta <<
140 << " mass(MeV)= " << mass <<
141 << " isCombined=" << isCombined <<
142 << " ion=" << ion <<
143 << G4endl; <<
144 */ <<
145 if(nullptr == EmModel(0)) { <<
146 if(ion) { SetEmModel(new G4IonCoulombScatt <<
147 else { SetEmModel(new G4eCoulombScattering <<
148 } <<
149 G4VEmModel* model = EmModel(0); <<
150 G4double emin = std::max(param->MinKinEnergy <<
151 G4double emax = std::min(param->MaxKinEnergy <<
152 model->SetPolarAngleLimit(theta); <<
153 model->SetLowEnergyLimit(emin); <<
154 model->SetHighEnergyLimit(emax); <<
155 AddEmModel(1, model); <<
156 } <<
157 <<
158 //....oooOO0OOooo........oooOO0OOooo........oo <<
159 <<
160 G4double G4CoulombScattering::MinPrimaryEnergy <<
161 const G4Material* mat) <<
162 { <<
163 // Pure Coulomb scattering <<
164 G4double emin = 0.0; <<
165 <<
166 // Coulomb scattering combined with multiple <<
167 G4double theta = G4EmParameters::Instance()- <<
168 126
169 if(0.0 < theta) { << 127 G4double emin = MinKinEnergy();
170 G4double p2 = q2Max*mat->GetIonisation()-> << 128 G4double emax = MaxKinEnergy();
171 G4double mass = part->GetPDGMass(); << 129 // G4gCoulombScatteringModel* model = new G4hCoulombScatteringModel();
172 emin = p2/(std::sqrt(p2 + mass*mass) + mas << 130 G4eCoulombScatteringModel* model = new G4eCoulombScatteringModel();
>> 131 model->SetPolarAngleLimit(PolarAngleLimit());
>> 132 model->SetLowEnergyLimit(emin);
>> 133 model->SetHighEnergyLimit(emax);
>> 134 AddEmModel(1, model);
>> 135 /*
>> 136
>> 137 G4double eth = thEnergy;
>> 138 if(mass < MeV) eth = thEnergyElec;
>> 139 if(eth > emin) {
>> 140 G4eCoulombScatteringModel* model = new G4eCoulombScatteringModel();
>> 141 model->SetPolarAngleLimit(PolarAngleLimit());
>> 142 model->SetLowEnergyLimit(emin);
>> 143 model->SetHighEnergyLimit(std::min(eth,emax));
>> 144 AddEmModel(1, model);
>> 145 }
>> 146 if(eth < emax) {
>> 147 G4CoulombScatteringModel* model = new G4CoulombScatteringModel();
>> 148 model->SetPolarAngleLimit(PolarAngleLimit());
>> 149 model->SetLowEnergyLimit(eth);
>> 150 model->SetHighEnergyLimit(emax);
>> 151 AddEmModel(2, model);
>> 152 }
>> 153 */
173 } 154 }
174 <<
175 return emin; <<
176 } 155 }
177 156
178 //....oooOO0OOooo........oooOO0OOooo........oo 157 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
179 158
180 void G4CoulombScattering::StreamProcessInfo(st << 159 void G4CoulombScattering::PrintInfo()
181 { 160 {
182 G4double tetmin = G4EmParameters::Instance() << 161 G4cout << " " << PolarAngleLimit()/degree
183 outFile << " "; << 162 << " < Theta(degree) < 180"
184 if(tetmin > 179.) { outFile << "ThetaMin(p)" << 163 << ", Eth(MeV)= ";
185 else { outFile << tetmin; } <<
186 outFile << " < Theta(degree) < 180"; <<
187 <<
188 if(q2Max < DBL_MAX) { <<
189 outFile << ", pLimit(GeV^1)= " << std::sqr <<
190 } <<
191 outFile << G4endl; <<
192 } <<
193 164
194 //....oooOO0OOooo........oooOO0OOooo........oo << 165 if(aParticle->GetPDGMass() < MeV) G4cout << thEnergyElec;
>> 166 else G4cout << thEnergy;
195 167
196 void G4CoulombScattering::ProcessDescription(s << 168 if(q2Max < DBL_MAX) { G4cout << "; pLimit(GeV^1)= " << sqrt(q2Max)/GeV; }
197 { << 169 G4cout << G4endl;
198 out << <<
199 " Coulomb scattering. Simulation of elastic <<
200 " events individually. May be used in com <<
201 " scattering, where Coulomb scattering is <<
202 " collisions and multiple scattering for <<
203 G4VEmProcess::ProcessDescription(out); <<
204 } 170 }
205 171
206 //....oooOO0OOooo........oooOO0OOooo........oo << 172 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
207 173