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>> 26 // $Id: G4CoulombScattering.cc 107365 2017-11-09 10:54:29Z gcosmo $
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 "G4IonCoulombScatteringModel.hh"
53 #include "G4Proton.hh" 54 #include "G4Proton.hh"
54 #include "G4EmParameters.hh" 55 #include "G4EmParameters.hh"
55 56
56 //....oooOO0OOooo........oooOO0OOooo........oo 57 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
57 58
58 G4CoulombScattering::G4CoulombScattering(const << 59 using namespace std;
59 : G4VEmProcess(nam), << 60
60 q2Max(CLHEP::TeV*CLHEP::TeV), << 61 G4CoulombScattering::G4CoulombScattering(const G4String& name)
61 isCombined(comb) << 62 : G4VEmProcess(name),q2Max(TeV*TeV),isInitialised(false)
62 { 63 {
>> 64 // G4cout << "G4CoulombScattering constructor "<< G4endl;
63 SetBuildTableFlag(true); 65 SetBuildTableFlag(true);
64 SetStartFromNullFlag(false); 66 SetStartFromNullFlag(false);
65 SetSplineFlag(false); << 67 SetIntegral(true);
66 SetCrossSectionType(fEmOnePeak); <<
67 SetSecondaryParticle(G4Proton::Proton()); 68 SetSecondaryParticle(G4Proton::Proton());
68 SetProcessSubType(fCoulombScattering); 69 SetProcessSubType(fCoulombScattering);
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 {} <<
76 <<
77 //....oooOO0OOooo........oooOO0OOooo........oo <<
78 <<
79 G4CoulombScattering::G4CoulombScattering(G4boo <<
80 : G4CoulombScattering("CoulombScat", comb) <<
81 {} 75 {}
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 G4EmParameters* param = G4EmParameters::Instance();
104 G4double a = param->FactorForAngleLimit()*CL 94 G4double a = param->FactorForAngleLimit()*CLHEP::hbarc/CLHEP::fermi;
105 q2Max = 0.5*a*a; 95 q2Max = 0.5*a*a;
106 G4double theta = param->MscThetaLimit(); 96 G4double theta = param->MscThetaLimit();
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()
115 } else { << 105 << " Emin(MeV)= " << MinKinEnergy()/MeV
116 SetSplineFlag(true); << 106 << " Emax(TeV)= " << MaxKinEnergy()/TeV
117 SetCrossSectionType(fEmDecreasing); << 107 << " nbins= " << LambdaBinning()
118 } << 108 << " theta= " << theta
>> 109 << G4endl;
>> 110 */
>> 111
119 isInitialised = true; 112 isInitialised = true;
120 G4double mass = p->GetPDGMass(); 113 G4double mass = p->GetPDGMass();
121 G4String name = p->GetParticleName(); 114 G4String name = p->GetParticleName();
122 << 115 //G4cout << name << " type: " << p->GetParticleType()
123 G4bool ion = false; << 116 //<< " mass= " << mass << G4endl;
124 if (mass > CLHEP::GeV || p->GetParticleType( << 117 yes = true;
>> 118 if (mass > GeV || p->GetParticleType() == "nucleus") {
125 SetBuildTableFlag(false); 119 SetBuildTableFlag(false);
126 ion = true; << 120 yes = false;
127 if(name != "GenericIon") { SetVerboseLevel 121 if(name != "GenericIon") { SetVerboseLevel(0); }
128 } else { 122 } else {
129 if(name != "e-" && name != "e+" && 123 if(name != "e-" && name != "e+" &&
130 name != "mu+" && name != "mu-" && name 124 name != "mu+" && name != "mu-" && name != "pi+" &&
131 name != "kaon+" && name != "proton" ) { 125 name != "kaon+" && name != "proton" ) { SetVerboseLevel(0); }
132 } 126 }
133 /* << 127
134 G4cout << "### G4CoulombScattering::Initiali << 128 if(!EmModel(0)) {
135 << p->GetParticleName() << 129 if(yes) { SetEmModel(new G4eCoulombScatteringModel()); }
136 << " Emin(MeV)= " << MinKinEnergy()/MeV << 130 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 } 131 }
149 G4VEmModel* model = EmModel(0); 132 G4VEmModel* model = EmModel(0);
150 G4double emin = std::max(param->MinKinEnergy 133 G4double emin = std::max(param->MinKinEnergy(),model->LowEnergyLimit());
151 G4double emax = std::min(param->MaxKinEnergy 134 G4double emax = std::min(param->MaxKinEnergy(),model->HighEnergyLimit());
152 model->SetPolarAngleLimit(theta); 135 model->SetPolarAngleLimit(theta);
153 model->SetLowEnergyLimit(emin); 136 model->SetLowEnergyLimit(emin);
154 model->SetHighEnergyLimit(emax); 137 model->SetHighEnergyLimit(emax);
155 AddEmModel(1, model); 138 AddEmModel(1, model);
156 } 139 }
157 140
158 //....oooOO0OOooo........oooOO0OOooo........oo 141 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
159 142
160 G4double G4CoulombScattering::MinPrimaryEnergy 143 G4double G4CoulombScattering::MinPrimaryEnergy(const G4ParticleDefinition* part,
161 const G4Material* mat) 144 const G4Material* mat)
162 { 145 {
163 // Pure Coulomb scattering 146 // Pure Coulomb scattering
164 G4double emin = 0.0; 147 G4double emin = 0.0;
165 148
166 // Coulomb scattering combined with multiple 149 // Coulomb scattering combined with multiple or hadronic scattering
167 G4double theta = G4EmParameters::Instance()- 150 G4double theta = G4EmParameters::Instance()->MscThetaLimit();
168 151
169 if(0.0 < theta) { 152 if(0.0 < theta) {
170 G4double p2 = q2Max*mat->GetIonisation()-> << 153 G4double p2 = q2Max*mat->GetIonisation()->GetInvA23()/(1.0 - cos(theta));
171 G4double mass = part->GetPDGMass(); 154 G4double mass = part->GetPDGMass();
172 emin = p2/(std::sqrt(p2 + mass*mass) + mas << 155 emin = sqrt(p2 + mass*mass) - mass;
173 } 156 }
174 157
175 return emin; 158 return emin;
176 } 159 }
177 160
178 //....oooOO0OOooo........oooOO0OOooo........oo 161 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
179 162
180 void G4CoulombScattering::StreamProcessInfo(st << 163 void G4CoulombScattering::StreamProcessInfo(std::ostream& outFile,
>> 164 G4String endOfLine) const
181 { 165 {
182 G4double tetmin = G4EmParameters::Instance() << 166 G4double tetmin = G4EmParameters::Instance()->MscThetaLimit()/degree;
183 outFile << " "; 167 outFile << " ";
184 if(tetmin > 179.) { outFile << "ThetaMin(p)" 168 if(tetmin > 179.) { outFile << "ThetaMin(p)"; }
185 else { outFile << tetmin; } 169 else { outFile << tetmin; }
186 outFile << " < Theta(degree) < 180"; 170 outFile << " < Theta(degree) < 180";
187 171
188 if(q2Max < DBL_MAX) { << 172 if(q2Max < DBL_MAX) { outFile << "; pLimit(GeV^1)= " << sqrt(q2Max)/GeV; }
189 outFile << ", pLimit(GeV^1)= " << std::sqr << 173 outFile << endOfLine;
190 } <<
191 outFile << G4endl; <<
192 } 174 }
193 175
194 //....oooOO0OOooo........oooOO0OOooo........oo 176 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
195 177
196 void G4CoulombScattering::ProcessDescription(s 178 void G4CoulombScattering::ProcessDescription(std::ostream& out) const
197 { 179 {
198 out << 180 out <<
199 " Coulomb scattering. Simulation of elastic << 181 "<strong>Coulomb scattering</strong>. Simulation of elastic scattering <br>"
200 " events individually. May be used in com << 182 "events individually. May be used in combination with multiple<br>"
201 " scattering, where Coulomb scattering is << 183 "scattering, where Coulomb scattering is used for hard (large angle)<br>"
202 " collisions and multiple scattering for << 184 "collisions and multiple scattering for soft collisions.";
203 G4VEmProcess::ProcessDescription(out); 185 G4VEmProcess::ProcessDescription(out);
204 } 186 }
205 187
206 //....oooOO0OOooo........oooOO0OOooo........oo 188 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
207 189