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>> 26 // $Id: G4eCoulombScatteringModel.hh,v 1.5 2006/10/19 09:44:27 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-08-03-patch-01 $
26 // 28 //
27 // ------------------------------------------- 29 // -------------------------------------------------------------------
28 // 30 //
29 // GEANT4 Class header file 31 // GEANT4 Class header file
30 // 32 //
31 // 33 //
32 // File name: G4eCoulombScatteringModel 34 // File name: G4eCoulombScatteringModel
33 // 35 //
34 // Author: Vladimir Ivanchenko 36 // Author: Vladimir Ivanchenko
35 // 37 //
36 // Creation date: 19.02.2006 38 // Creation date: 19.02.2006
37 // 39 //
38 // Modifications: 40 // Modifications:
39 // 01.08.06 V.Ivanchenko extend upper limit of 41 // 01.08.06 V.Ivanchenko extend upper limit of table to TeV and review the
40 // logic of building - only elements 42 // logic of building - only elements from G4ElementTable
41 // 08.08.06 V.Ivanchenko build internal table 43 // 08.08.06 V.Ivanchenko build internal table in ekin scale, introduce faclim
42 // 19.08.06 V.Ivanchenko add inline function S 44 // 19.08.06 V.Ivanchenko add inline function ScreeningParameter and
43 // make some members pro 45 // make some members protected
44 // 09.10.07 V.Ivanchenko reorganized methods, <<
45 // 09.06.08 V.Ivanchenko add SelectIsotope and <<
46 // 17.06.09 C.Consoalndi modified SetupTarget <<
47 // 27.05.10 V.Ivanchenko added G4WentzelOKandV <<
48 // compute cross sections and sam <<
49 // <<
50 // 46 //
51 // Class Description: 47 // Class Description:
52 // 48 //
53 // Implementation of eCoulombScattering of a c << 49 // Implementation of eCoulombScattering of pointlike charge particle
54 // on Atomic Nucleus for interval of scatterin 50 // on Atomic Nucleus for interval of scattering anles in Lab system
55 // thetaMin - ThetaMax. << 51 // thetaMin - ThetaMax, nucleus recoil is neglected.
56 // The model based on analysis of J.M.Fernan 52 // The model based on analysis of J.M.Fernandez-Varea et al.
57 // NIM B73(1993)447 originated from G.Wentzel 53 // NIM B73(1993)447 originated from G.Wentzel Z.Phys. 40(1927)590 with
58 // screening parameter from H.A.Bethe Phys. Re 54 // screening parameter from H.A.Bethe Phys. Rev. 89 (1953) 1256.
59 // 55 //
60 56
61 // ------------------------------------------- 57 // -------------------------------------------------------------------
62 // 58 //
63 59
64 #ifndef G4eCoulombScatteringModel_h 60 #ifndef G4eCoulombScatteringModel_h
65 #define G4eCoulombScatteringModel_h 1 61 #define G4eCoulombScatteringModel_h 1
66 62
67 #include "G4VEmModel.hh" 63 #include "G4VEmModel.hh"
>> 64 #include "G4PhysicsTable.hh"
68 #include "globals.hh" 65 #include "globals.hh"
69 #include "G4MaterialCutsCouple.hh" <<
70 #include "G4WentzelOKandVIxSection.hh" <<
71 66
72 class G4ParticleChangeForGamma; 67 class G4ParticleChangeForGamma;
73 class G4ParticleDefinition; <<
74 class G4IonTable; <<
75 class G4NistManager; <<
76 68
77 class G4eCoulombScatteringModel : public G4VEm 69 class G4eCoulombScatteringModel : public G4VEmModel
78 { 70 {
79 71
80 public: 72 public:
81 73
82 explicit G4eCoulombScatteringModel(G4bool co << 74 G4eCoulombScatteringModel(G4double thetaMin = 0.0, G4double thetaMax = pi,
>> 75 G4bool build = true, G4double tlim = TeV*TeV,
>> 76 const G4String& nam = "eCoulombScattering");
83 77
84 ~G4eCoulombScatteringModel() override; << 78 virtual ~G4eCoulombScatteringModel();
85 79
86 void Initialise(const G4ParticleDefinition*, << 80 virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
87 81
88 void InitialiseLocal(const G4ParticleDefinit << 82 virtual G4double ComputeCrossSectionPerAtom(
89 G4VEmModel* masterModel <<
90 <<
91 G4double ComputeCrossSectionPerAtom( <<
92 const G4Partic 83 const G4ParticleDefinition*,
93 G4double kinEnergy, << 84 G4double kinEnergy,
94 G4double Z, << 85 G4double Z,
95 G4double A, << 86 G4double A,
96 G4double cut, << 87 G4double cut,
97 G4double emax) override; << 88 G4double emax);
98 << 89
99 void SampleSecondaries(std::vector<G4Dynamic << 90 virtual std::vector<G4DynamicParticle*>* SampleSecondaries(
100 const G4MaterialCutsCouple*, << 91 const G4MaterialCutsCouple*,
101 const G4DynamicParticle*, << 92 const G4DynamicParticle*,
102 G4double tmin, << 93 G4double tmin,
103 G4double maxEnergy) override; << 94 G4double maxEnergy);
104 <<
105 G4double MinPrimaryEnergy(const G4Material*, <<
106 G4double) final; <<
107 <<
108 // defines low energy limit of the model <<
109 inline void SetLowEnergyThreshold(G4double v <<
110 95
111 // user definition of low-energy threshold o << 96 protected:
112 inline void SetRecoilThreshold(G4double eth) <<
113 97
114 // defines low energy limit on energy transf << 98 G4double ScreeningParameter(G4double Z, G4double q2,
115 inline void SetFixedCut(G4double); << 99 G4double mom2, G4double invbeta2);
116 100
117 // low energy limit on energy transfer to at << 101 private:
118 inline G4double GetFixedCut() const; << 102
>> 103 G4double CalculateCrossSectionPerAtom(const G4ParticleDefinition*,
>> 104 G4double kinEnergy,
>> 105 G4double Z);
119 106
120 // hide assignment operator 107 // hide assignment operator
121 G4eCoulombScatteringModel & operator= << 108 G4eCoulombScatteringModel & operator=(const G4eCoulombScatteringModel &right);
122 (const G4eCoulombScatteringModel &right) = d << 109 G4eCoulombScatteringModel(const G4eCoulombScatteringModel&);
123 G4eCoulombScatteringModel(const G4eCoulombS <<
124 110
125 protected: 111 protected:
126 112
127 inline void DefineMaterial(const G4MaterialC << 113 G4ParticleChangeForGamma* fParticleChange;
128 <<
129 inline void SetupParticle(const G4ParticleDe <<
130 <<
131 private: <<
132 <<
133 G4IonTable* theIonTable; <<
134 G4ParticleChangeForGamma* fParticleChange = <<
135 G4WentzelOKandVIxSection* wokvi; <<
136 G4NistManager* fNistManager; <<
137 <<
138 const std::vector<G4double>* pCuts = nullptr <<
139 <<
140 const G4ParticleDefinition* particle = nullp <<
141 const G4ParticleDefinition* theProton; <<
142 <<
143 const G4MaterialCutsCouple* currentCouple = <<
144 const G4Material* currentMaterial = nullptr; <<
145 G4int currentMaterialIndex = 0; <<
146 <<
147 G4double cosThetaMin = 1.0; <<
148 G4double cosThetaMax = -1.0; <<
149 G4double recoilThreshold = 0.0; <<
150 G4double elecRatio = 0.0; <<
151 G4double fixedCut = -1.0; <<
152 G4double mass; <<
153 <<
154 G4bool isCombined; <<
155 }; <<
156 114
157 //....oooOO0OOooo........oooOO0OOooo........oo << 115 G4double coeff;
>> 116 G4double cosThetaMin;
>> 117 G4double cosThetaMax;
>> 118 G4double q2Limit;
158 119
159 inline <<
160 void G4eCoulombScatteringModel::DefineMaterial <<
161 { <<
162 if(cup != currentCouple) { <<
163 currentCouple = cup; <<
164 currentMaterial = cup->GetMaterial(); <<
165 currentMaterialIndex = currentCouple->GetI <<
166 } <<
167 } <<
168 120
169 //....oooOO0OOooo........oooOO0OOooo........oo << 121 private:
170 122
171 inline << 123 G4PhysicsTable* theCrossSectionTable;
172 void G4eCoulombScatteringModel::SetupParticle( <<
173 { <<
174 // Initialise mass and charge <<
175 if(p != particle) { <<
176 particle = p; <<
177 mass = particle->GetPDGMass(); <<
178 wokvi->SetupParticle(p); <<
179 } <<
180 } <<
181 124
182 //....oooOO0OOooo........oooOO0OOooo........oo << 125 G4double a0;
>> 126 G4double lowKEnergy;
>> 127 G4double highKEnergy;
>> 128 G4double alpha2;
>> 129 G4double faclim;
>> 130
>> 131 G4int nbins;
>> 132 G4int nmax;
>> 133 G4int index[100];
183 134
184 inline void G4eCoulombScatteringModel::SetReco << 135 G4bool buildTable;
185 { << 136 G4bool isInitialised;
186 recoilThreshold = eth; << 137 };
187 } <<
188 138
189 //....oooOO0OOooo........oooOO0OOooo........oo << 139 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
190 140
191 inline void G4eCoulombScatteringModel::SetFixe << 141 inline G4double G4eCoulombScatteringModel::ComputeCrossSectionPerAtom(
>> 142 const G4ParticleDefinition* p,
>> 143 G4double kinEnergy,
>> 144 G4double Z, G4double,
>> 145 G4double, G4double)
192 { 146 {
193 fixedCut = val; << 147 G4double x;
>> 148 G4bool b;
>> 149 if(theCrossSectionTable) {
>> 150 x = std::exp((((*theCrossSectionTable)[index[G4int(Z)]]))
>> 151 ->GetValue(kinEnergy, b));
>> 152 } else x = CalculateCrossSectionPerAtom(p, kinEnergy, Z);
>> 153
>> 154 // G4cout << "G4eCoulombScatteringModel: e= " << kinEnergy
>> 155 // << " cs= " << x << G4endl;
>> 156 return x;
194 } 157 }
195 158
196 //....oooOO0OOooo........oooOO0OOooo........oo << 159 inline G4double G4eCoulombScatteringModel::ScreeningParameter(
197 << 160 G4double Z,
198 inline G4double G4eCoulombScatteringModel::Get << 161 G4double q2,
>> 162 G4double mom2,
>> 163 G4double invbeta2)
199 { 164 {
200 return fixedCut; << 165 G4double a = invbeta2*Z*Z*q2*alpha2;
>> 166 return std::pow(Z,0.6666667)*a0*(1.13 + 3.76*a)/mom2;
201 } 167 }
202 168
203 //....oooOO0OOooo........oooOO0OOooo........oo 169 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
204 170
205 #endif 171 #endif
206 172