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27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class file 29 // GEANT4 Class file
30 // 30 //
31 // 31 //
32 // File name: G4CoulombScattering 32 // File name: G4CoulombScattering
33 // 33 //
34 // Author: Vladimir Ivanchenko 34 // Author: Vladimir Ivanchenko
35 // 35 //
36 // Creation date: 22.08.2004 36 // Creation date: 22.08.2004
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 01.08.06 V.Ivanchenko add choice between G4 39 // 01.08.06 V.Ivanchenko add choice between G4eCoulombScatteringModel and
40 // G4CoulombScatteringModel 40 // G4CoulombScatteringModel
41 // 41 //
42 42
43 // 43 //
44 // ------------------------------------------- 44 // -------------------------------------------------------------------
45 // 45 //
46 //....oooOO0OOooo........oooOO0OOooo........oo 46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
47 //....oooOO0OOooo........oooOO0OOooo........oo 47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
48 48
49 #include "G4CoulombScattering.hh" 49 #include "G4CoulombScattering.hh"
50 #include "G4SystemOfUnits.hh" 50 #include "G4SystemOfUnits.hh"
51 #include "G4eCoulombScatteringModel.hh" 51 #include "G4eCoulombScatteringModel.hh"
52 #include "G4IonCoulombScatteringModel.hh" 52 #include "G4IonCoulombScatteringModel.hh"
53 #include "G4Proton.hh" 53 #include "G4Proton.hh"
54 #include "G4EmParameters.hh" 54 #include "G4EmParameters.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 } 69 }
70 70
71 //....oooOO0OOooo........oooOO0OOooo........oo 71 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
72 72
73 G4CoulombScattering::G4CoulombScattering(const << 73 G4CoulombScattering::~G4CoulombScattering()
74 : G4CoulombScattering(nam, true) <<
75 {} <<
76 <<
77 //....oooOO0OOooo........oooOO0OOooo........oo <<
78 <<
79 G4CoulombScattering::G4CoulombScattering(G4boo <<
80 : G4CoulombScattering("CoulombScat", comb) <<
81 {} 74 {}
82 <<
83 //....oooOO0OOooo........oooOO0OOooo........oo <<
84 <<
85 G4CoulombScattering::~G4CoulombScattering() = <<
86 75
87 //....oooOO0OOooo........oooOO0OOooo........oo 76 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
88 77
89 G4bool G4CoulombScattering::IsApplicable(const 78 G4bool G4CoulombScattering::IsApplicable(const G4ParticleDefinition& p)
90 { 79 {
91 return (p.GetPDGCharge() != 0.0); << 80 return (p.GetPDGCharge() != 0.0 && !p.IsShortLived());
92 } 81 }
93 82
94 //....oooOO0OOooo........oooOO0OOooo........oo 83 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
95 84
96 void G4CoulombScattering::InitialiseProcess(co 85 void G4CoulombScattering::InitialiseProcess(const G4ParticleDefinition* p)
97 { 86 {
98 // second initialisation not allowed for the 87 // second initialisation not allowed for the time being
99 // this means that polar angle limit change 88 // this means that polar angle limit change will not be appled
100 // after first initialisation 89 // after first initialisation
101 if(isInitialised) { return; } 90 if(isInitialised) { return; }
102 91
103 G4EmParameters* param = G4EmParameters::Inst 92 G4EmParameters* param = G4EmParameters::Instance();
104 G4double a = param->FactorForAngleLimit()*CL 93 G4double a = param->FactorForAngleLimit()*CLHEP::hbarc/CLHEP::fermi;
105 q2Max = 0.5*a*a; 94 q2Max = 0.5*a*a;
106 G4double theta = param->MscThetaLimit(); 95 G4double theta = param->MscThetaLimit();
107 96
108 // restricted or non-restricted cross sectio 97 // restricted or non-restricted cross section table
109 if(isCombined) { << 98 G4bool yes = false;
110 if(theta == CLHEP::pi) { << 99 if(theta == CLHEP::pi) { yes = true; }
111 // for restriced single scattering chang << 100 SetStartFromNullFlag(yes);
112 SetCrossSectionType(fEmIncreasing); << 101 /*
113 SetStartFromNullFlag(true); << 102 G4cout << "### G4CoulombScattering::InitialiseProcess: "
114 } << 103 << p->GetParticleName()
115 } else { << 104 << " Emin(MeV)= " << MinKinEnergy()/MeV
116 SetSplineFlag(true); << 105 << " Emax(TeV)= " << MaxKinEnergy()/TeV
117 SetCrossSectionType(fEmDecreasing); << 106 << " nbins= " << LambdaBinning()
118 } << 107 << " theta= " << theta
>> 108 << G4endl;
>> 109 */
>> 110
119 isInitialised = true; 111 isInitialised = true;
120 G4double mass = p->GetPDGMass(); 112 G4double mass = p->GetPDGMass();
121 G4String name = p->GetParticleName(); 113 G4String name = p->GetParticleName();
122 << 114 //G4cout << name << " type: " << p->GetParticleType()
123 G4bool ion = false; << 115 //<< " mass= " << mass << G4endl;
124 if (mass > CLHEP::GeV || p->GetParticleType( << 116 yes = true;
>> 117 if (mass > GeV || p->GetParticleType() == "nucleus") {
125 SetBuildTableFlag(false); 118 SetBuildTableFlag(false);
126 ion = true; << 119 yes = false;
127 if(name != "GenericIon") { SetVerboseLevel 120 if(name != "GenericIon") { SetVerboseLevel(0); }
128 } else { 121 } else {
129 if(name != "e-" && name != "e+" && 122 if(name != "e-" && name != "e+" &&
130 name != "mu+" && name != "mu-" && name 123 name != "mu+" && name != "mu-" && name != "pi+" &&
131 name != "kaon+" && name != "proton" ) { 124 name != "kaon+" && name != "proton" ) { SetVerboseLevel(0); }
132 } 125 }
133 /* << 126
134 G4cout << "### G4CoulombScattering::Initiali << 127 if(!EmModel(0)) {
135 << p->GetParticleName() << 128 if(yes) { SetEmModel(new G4eCoulombScatteringModel()); }
136 << " Emin(MeV)= " << MinKinEnergy()/MeV << 129 else { SetEmModel(new G4IonCoulombScatteringModel()); }
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 } 130 }
149 G4VEmModel* model = EmModel(0); 131 G4VEmModel* model = EmModel(0);
150 G4double emin = std::max(param->MinKinEnergy 132 G4double emin = std::max(param->MinKinEnergy(),model->LowEnergyLimit());
151 G4double emax = std::min(param->MaxKinEnergy 133 G4double emax = std::min(param->MaxKinEnergy(),model->HighEnergyLimit());
152 model->SetPolarAngleLimit(theta); 134 model->SetPolarAngleLimit(theta);
153 model->SetLowEnergyLimit(emin); 135 model->SetLowEnergyLimit(emin);
154 model->SetHighEnergyLimit(emax); 136 model->SetHighEnergyLimit(emax);
155 AddEmModel(1, model); 137 AddEmModel(1, model);
156 } 138 }
157 139
158 //....oooOO0OOooo........oooOO0OOooo........oo 140 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
159 141
160 G4double G4CoulombScattering::MinPrimaryEnergy 142 G4double G4CoulombScattering::MinPrimaryEnergy(const G4ParticleDefinition* part,
161 const G4Material* mat) 143 const G4Material* mat)
162 { 144 {
163 // Pure Coulomb scattering 145 // Pure Coulomb scattering
164 G4double emin = 0.0; 146 G4double emin = 0.0;
165 147
166 // Coulomb scattering combined with multiple 148 // Coulomb scattering combined with multiple or hadronic scattering
167 G4double theta = G4EmParameters::Instance()- 149 G4double theta = G4EmParameters::Instance()->MscThetaLimit();
168 150
169 if(0.0 < theta) { 151 if(0.0 < theta) {
170 G4double p2 = q2Max*mat->GetIonisation()-> << 152 G4double p2 = q2Max*mat->GetIonisation()->GetInvA23()/(1.0 - cos(theta));
171 G4double mass = part->GetPDGMass(); 153 G4double mass = part->GetPDGMass();
172 emin = p2/(std::sqrt(p2 + mass*mass) + mas << 154 emin = sqrt(p2 + mass*mass) - mass;
173 } 155 }
174 156
175 return emin; 157 return emin;
176 } 158 }
177 159
178 //....oooOO0OOooo........oooOO0OOooo........oo 160 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
179 161
180 void G4CoulombScattering::StreamProcessInfo(st 162 void G4CoulombScattering::StreamProcessInfo(std::ostream& outFile) const
181 { 163 {
182 G4double tetmin = G4EmParameters::Instance() << 164 G4double tetmin = G4EmParameters::Instance()->MscThetaLimit()/degree;
183 outFile << " "; 165 outFile << " ";
184 if(tetmin > 179.) { outFile << "ThetaMin(p)" 166 if(tetmin > 179.) { outFile << "ThetaMin(p)"; }
185 else { outFile << tetmin; } 167 else { outFile << tetmin; }
186 outFile << " < Theta(degree) < 180"; 168 outFile << " < Theta(degree) < 180";
187 169
188 if(q2Max < DBL_MAX) { << 170 if(q2Max < DBL_MAX) { outFile << "; pLimit(GeV^1)= " << sqrt(q2Max)/GeV; }
189 outFile << ", pLimit(GeV^1)= " << std::sqr <<
190 } <<
191 outFile << G4endl; 171 outFile << G4endl;
192 } 172 }
193 173
194 //....oooOO0OOooo........oooOO0OOooo........oo 174 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
195 175
196 void G4CoulombScattering::ProcessDescription(s 176 void G4CoulombScattering::ProcessDescription(std::ostream& out) const
197 { 177 {
198 out << 178 out <<
199 " Coulomb scattering. Simulation of elastic 179 " Coulomb scattering. Simulation of elastic scattering\n" <<
200 " events individually. May be used in com 180 " events individually. May be used in combination with multiple\n" <<
201 " scattering, where Coulomb scattering is 181 " scattering, where Coulomb scattering is used for hard (large angle)\n" <<
202 " collisions and multiple scattering for 182 " collisions and multiple scattering for soft collisions.";
203 G4VEmProcess::ProcessDescription(out); 183 G4VEmProcess::ProcessDescription(out);
204 } 184 }
205 185
206 //....oooOO0OOooo........oooOO0OOooo........oo 186 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
207 187