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>> 26 // $Id: G4CoulombScattering.cc 66241 2012-12-13 18:34:42Z gunter $
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class file 30 // GEANT4 Class file
30 // 31 //
31 // 32 //
32 // File name: G4CoulombScattering 33 // File name: G4CoulombScattering
33 // 34 //
34 // Author: Vladimir Ivanchenko 35 // Author: Vladimir Ivanchenko
35 // 36 //
36 // Creation date: 22.08.2004 37 // Creation date: 22.08.2004
37 // 38 //
38 // Modifications: 39 // Modifications:
39 // 01.08.06 V.Ivanchenko add choice between G4 40 // 01.08.06 V.Ivanchenko add choice between G4eCoulombScatteringModel and
40 // G4CoulombScatteringModel 41 // G4CoulombScatteringModel
41 // 42 //
42 43
43 // 44 //
44 // ------------------------------------------- 45 // -------------------------------------------------------------------
45 // 46 //
46 //....oooOO0OOooo........oooOO0OOooo........oo 47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
47 //....oooOO0OOooo........oooOO0OOooo........oo 48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
48 49
49 #include "G4CoulombScattering.hh" 50 #include "G4CoulombScattering.hh"
50 #include "G4SystemOfUnits.hh" 51 #include "G4SystemOfUnits.hh"
51 #include "G4eCoulombScatteringModel.hh" 52 #include "G4eCoulombScatteringModel.hh"
52 #include "G4IonCoulombScatteringModel.hh" <<
53 #include "G4Proton.hh" 53 #include "G4Proton.hh"
54 #include "G4EmParameters.hh" << 54 #include "G4LossTableManager.hh"
55 55
56 //....oooOO0OOooo........oooOO0OOooo........oo 56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
57 57
58 G4CoulombScattering::G4CoulombScattering(const << 58 using namespace std;
59 : G4VEmProcess(nam), << 59
60 q2Max(CLHEP::TeV*CLHEP::TeV), << 60 G4CoulombScattering::G4CoulombScattering(const G4String& name)
61 isCombined(comb) << 61 : G4VEmProcess(name),q2Max(TeV*TeV),isInitialised(false)
62 { 62 {
>> 63 // G4cout << "G4CoulombScattering constructor "<< G4endl;
63 SetBuildTableFlag(true); 64 SetBuildTableFlag(true);
64 SetStartFromNullFlag(false); 65 SetStartFromNullFlag(false);
65 SetSplineFlag(false); << 66 SetIntegral(true);
66 SetCrossSectionType(fEmOnePeak); <<
67 SetSecondaryParticle(G4Proton::Proton()); 67 SetSecondaryParticle(G4Proton::Proton());
68 SetProcessSubType(fCoulombScattering); 68 SetProcessSubType(fCoulombScattering);
>> 69 SetSplineFlag(true);
69 } 70 }
70 71
71 //....oooOO0OOooo........oooOO0OOooo........oo 72 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
72 73
73 G4CoulombScattering::G4CoulombScattering(const << 74 G4CoulombScattering::~G4CoulombScattering()
74 : G4CoulombScattering(nam, true) <<
75 {} 75 {}
76 <<
77 //....oooOO0OOooo........oooOO0OOooo........oo <<
78 <<
79 G4CoulombScattering::G4CoulombScattering(G4boo <<
80 : G4CoulombScattering("CoulombScat", comb) <<
81 {} <<
82 <<
83 //....oooOO0OOooo........oooOO0OOooo........oo <<
84 <<
85 G4CoulombScattering::~G4CoulombScattering() = <<
86 76
87 //....oooOO0OOooo........oooOO0OOooo........oo 77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
88 78
89 G4bool G4CoulombScattering::IsApplicable(const 79 G4bool G4CoulombScattering::IsApplicable(const G4ParticleDefinition& p)
90 { 80 {
91 return (p.GetPDGCharge() != 0.0); << 81 return (p.GetPDGCharge() != 0.0 && !p.IsShortLived());
92 } 82 }
93 83
94 //....oooOO0OOooo........oooOO0OOooo........oo 84 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
95 85
96 void G4CoulombScattering::InitialiseProcess(co 86 void G4CoulombScattering::InitialiseProcess(const G4ParticleDefinition* p)
97 { 87 {
98 // second initialisation not allowed for the 88 // second initialisation not allowed for the time being
99 // this means that polar angle limit change 89 // this means that polar angle limit change will not be appled
100 // after first initialisation 90 // after first initialisation
101 if(isInitialised) { return; } 91 if(isInitialised) { return; }
102 92
103 G4EmParameters* param = G4EmParameters::Inst << 93 G4double a = G4LossTableManager::Instance()->FactorForAngleLimit()
104 G4double a = param->FactorForAngleLimit()*CL << 94 *CLHEP::hbarc/CLHEP::fermi;
105 q2Max = 0.5*a*a; 95 q2Max = 0.5*a*a;
106 G4double theta = param->MscThetaLimit(); << 96 G4double theta = PolarAngleLimit();
107 97
108 // restricted or non-restricted cross sectio 98 // restricted or non-restricted cross section table
109 if(isCombined) { << 99 G4bool yes = false;
110 if(theta == CLHEP::pi) { << 100 if(theta == CLHEP::pi) { yes = true; }
111 // for restriced single scattering chang << 101 SetStartFromNullFlag(yes);
112 SetCrossSectionType(fEmIncreasing); << 102 /*
113 SetStartFromNullFlag(true); << 103 G4cout << "### G4CoulombScattering::InitialiseProcess: "
114 } << 104 << p->GetParticleName()
>> 105 << " Emin(MeV)= " << MinKinEnergy()/MeV
>> 106 << " Emax(TeV)= " << MaxKinEnergy()/TeV
>> 107 << " nbins= " << LambdaBinning()
>> 108 << " theta= " << theta
>> 109 << G4endl;
>> 110 */
>> 111 /*
>> 112 // second initialisation
>> 113 if(isInitialised) {
>> 114 G4VEmModel* mod = EmModel(1);
>> 115 mod->SetPolarAngleLimit(theta);
>> 116 mod = GetModelByIndex(1);
>> 117 if(mod) { mod->SetPolarAngleLimit(theta); }
>> 118
>> 119 // first initialisation
115 } else { 120 } else {
116 SetSplineFlag(true); << 121 */
117 SetCrossSectionType(fEmDecreasing); << 122
118 } <<
119 isInitialised = true; 123 isInitialised = true;
120 G4double mass = p->GetPDGMass(); 124 G4double mass = p->GetPDGMass();
121 G4String name = p->GetParticleName(); 125 G4String name = p->GetParticleName();
122 << 126 //G4cout << name << " type: " << p->GetParticleType()
123 G4bool ion = false; << 127 //<< " mass= " << mass << G4endl;
124 if (mass > CLHEP::GeV || p->GetParticleType( << 128 if (mass > GeV || p->GetParticleType() == "nucleus") {
125 SetBuildTableFlag(false); 129 SetBuildTableFlag(false);
126 ion = true; <<
127 if(name != "GenericIon") { SetVerboseLevel 130 if(name != "GenericIon") { SetVerboseLevel(0); }
128 } else { 131 } else {
129 if(name != "e-" && name != "e+" && 132 if(name != "e-" && name != "e+" &&
130 name != "mu+" && name != "mu-" && name 133 name != "mu+" && name != "mu-" && name != "pi+" &&
131 name != "kaon+" && name != "proton" ) { 134 name != "kaon+" && name != "proton" ) { SetVerboseLevel(0); }
132 } 135 }
133 /* << 136
134 G4cout << "### G4CoulombScattering::Initiali << 137 if(!EmModel(1)) { SetEmModel(new G4eCoulombScatteringModel(), 1); }
135 << p->GetParticleName() << 138 G4VEmModel* model = EmModel(1);
136 << " Emin(MeV)= " << MinKinEnergy()/MeV << 139 G4double emin = std::max(MinKinEnergy(),model->LowEnergyLimit());
137 << " Emax(TeV)= " << MaxKinEnergy()/TeV << 140 G4double emax = std::min(MaxKinEnergy(),model->HighEnergyLimit());
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); 141 model->SetPolarAngleLimit(theta);
153 model->SetLowEnergyLimit(emin); 142 model->SetLowEnergyLimit(emin);
154 model->SetHighEnergyLimit(emax); 143 model->SetHighEnergyLimit(emax);
155 AddEmModel(1, model); 144 AddEmModel(1, model);
156 } 145 }
157 146
158 //....oooOO0OOooo........oooOO0OOooo........oo 147 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
159 148
160 G4double G4CoulombScattering::MinPrimaryEnergy 149 G4double G4CoulombScattering::MinPrimaryEnergy(const G4ParticleDefinition* part,
161 const G4Material* mat) 150 const G4Material* mat)
162 { 151 {
163 // Pure Coulomb scattering 152 // Pure Coulomb scattering
164 G4double emin = 0.0; 153 G4double emin = 0.0;
165 154
166 // Coulomb scattering combined with multiple 155 // Coulomb scattering combined with multiple or hadronic scattering
167 G4double theta = G4EmParameters::Instance()- << 156 G4double theta = PolarAngleLimit();
168 <<
169 if(0.0 < theta) { 157 if(0.0 < theta) {
170 G4double p2 = q2Max*mat->GetIonisation()-> << 158 G4double p2 = q2Max*mat->GetIonisation()->GetInvA23()/(1.0 - cos(theta));
171 G4double mass = part->GetPDGMass(); 159 G4double mass = part->GetPDGMass();
172 emin = p2/(std::sqrt(p2 + mass*mass) + mas << 160 emin = sqrt(p2 + mass*mass) - mass;
173 } 161 }
174 162
175 return emin; 163 return emin;
176 } 164 }
177 165
178 //....oooOO0OOooo........oooOO0OOooo........oo 166 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
179 167
180 void G4CoulombScattering::StreamProcessInfo(st << 168 void G4CoulombScattering::PrintInfo()
181 { 169 {
182 G4double tetmin = G4EmParameters::Instance() << 170 G4cout << " " << PolarAngleLimit()/degree
183 outFile << " "; << 171 << " < Theta(degree) < 180";
184 if(tetmin > 179.) { outFile << "ThetaMin(p)" <<
185 else { outFile << tetmin; } <<
186 outFile << " < Theta(degree) < 180"; <<
187 172
188 if(q2Max < DBL_MAX) { << 173 if(q2Max < DBL_MAX) { G4cout << "; pLimit(GeV^1)= " << sqrt(q2Max)/GeV; }
189 outFile << ", pLimit(GeV^1)= " << std::sqr << 174 G4cout << G4endl;
190 } <<
191 outFile << G4endl; <<
192 } 175 }
193 176
194 //....oooOO0OOooo........oooOO0OOooo........oo 177 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
195 <<
196 void G4CoulombScattering::ProcessDescription(s <<
197 { <<
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 } <<
205 <<
206 //....oooOO0OOooo........oooOO0OOooo........oo <<
207 178