| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // G4ScreeningMottCrossSection.hh 26 // G4ScreeningMottCrossSection.hh
27 //-------------------------------------------- 27 //-------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class header file 29 // GEANT4 Class header file
30 // 30 //
31 // File name: G4ScreeningMottCrossSection 31 // File name: G4ScreeningMottCrossSection
32 // 32 //
33 // Author: Cristina Consolandi 33 // Author: Cristina Consolandi
34 // 34 //
35 // Creation date: 20.10.2011 << 35 // Creation date: 20.10.2011
36 // 36 //
37 // Modifications: 37 // Modifications:
>> 38 // 27-05-2012 Added Analytic Fitting to the Mott Cross Section by means of G4MottCoefficients class.
>> 39 //
38 // 40 //
39 // Class Description: 41 // Class Description:
40 // Computation of electron Coulomb Scatte 42 // Computation of electron Coulomb Scattering Cross Section.
41 // Suitable for high energy electrons and << 43 // Suitable for high energy electrons and light target materials.
42 // 44 //
43 // Reference: 45 // Reference:
44 // M.J. Boschini et al. 46 // M.J. Boschini et al.
45 // "Non Ionizing Energy Loss induced by El 47 // "Non Ionizing Energy Loss induced by Electrons in the Space Environment"
46 // Proc. of the 13th Int. Conf. on Partic << 48 // Proc. of the 13th International Conference on Particle Physics and Advanced Technology
47 // (13th ICPPAT, Como 3-7/10/2011), World 49 // (13th ICPPAT, Como 3-7/10/2011), World Scientific (Singapore).
48 // Available at: http://arxiv.org/abs/111 50 // Available at: http://arxiv.org/abs/1111.4042v4
49 // 51 //
50 // 1) Mott Differential Cross Section App << 52 // 1) Mott Differential Cross Section Approximation:
51 // For Target material up to Z=92 (U): 53 // For Target material up to Z=92 (U):
52 // As described in http://arxiv.org/ab << 54 // As described in http://arxiv.org/abs/1111.4042v4
53 // par. 2.1 , eq. (16)-(17) 55 // par. 2.1 , eq. (16)-(17)
54 // Else (Z>92): 56 // Else (Z>92):
55 // W. A. McKinley and H. Fashbach, Phy 57 // W. A. McKinley and H. Fashbach, Phys. Rev. 74, (1948) 1759.
56 // 2) Screening coefficient: << 58 // 2) Screening coefficient:
57 // vomn G. Moliere, Z. Naturforsh A2 (194 59 // vomn G. Moliere, Z. Naturforsh A2 (1947), 133-145; A3 (1948), 78.
58 // 3) Nuclear Form Factor: << 60 // 3) Nuclear Form Factor:
59 // A.V. Butkevich et al. Nucl. Instr. Met << 61 // A.V. Butkevich et al. Nucl. Instr. and Meth. in Phys. Res. A 488 (2002), 282-294.
60 // 62 //
61 // ------------------------------------------- << 63 // ----------------------------------------------------------------------------------------
62 64
63 // 65 //
64 #ifndef G4ScreeningMottCrossSection_h 66 #ifndef G4ScreeningMottCrossSection_h
65 #define G4ScreeningMottCrossSection_h 1 67 #define G4ScreeningMottCrossSection_h 1
66 68
67 //....oooOO0OOooo........oooOO0OOooo........oo 69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
68 70
>> 71
>> 72 #include "G4MottCoefficients.hh"
69 #include "globals.hh" 73 #include "globals.hh"
70 #include "G4ParticleDefinition.hh" << 74 #include "G4Material.hh"
71 #include <vector> << 75 #include "G4Element.hh"
>> 76 #include "G4ElementVector.hh"
>> 77 #include "G4NistManager.hh"
>> 78 #include "G4ThreeVector.hh"
>> 79 #include "G4Pow.hh"
>> 80 #include "G4LossTableManager.hh"
72 81
73 //....oooOO0OOooo........oooOO0OOooo........oo 82 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
74 83
75 static const G4int DIMMOTT = 750; << 84 static const G4int DIM = 750;
76 85
77 class G4NistManager; << 86 class G4ParticleDefinition;
78 class G4Pow; <<
79 87
80 class G4ScreeningMottCrossSection 88 class G4ScreeningMottCrossSection
81 { 89 {
82 90
83 public: 91 public:
84 92
85 explicit G4ScreeningMottCrossSection(); << 93 explicit G4ScreeningMottCrossSection();
86 94
87 ~G4ScreeningMottCrossSection(); << 95 virtual ~G4ScreeningMottCrossSection();
88 96
89 void Initialise(const G4ParticleDefinition*, << 97 void Initialise(const G4ParticleDefinition*, G4double cosThetaLim);
90 98
91 void SetupKinematic(G4double kinEnergy, G4in << 99 G4double GetScreeningAngle();
>> 100 void SetScreeningCoefficient();
>> 101
>> 102 inline void SetupParticle(const G4ParticleDefinition*);
>> 103 void SetupKinematic(G4double kinEnergy ,G4double Z);
>> 104
>> 105 G4double NuclearCrossSection(G4int form);
>> 106 G4ThreeVector GetNewDirection();
>> 107
>> 108 inline G4double GetMom2CM()const;
>> 109 inline G4double GetMom2Lab()const;
>> 110 inline G4double GetTrec() const;
>> 111 inline G4double GetScreeningCoefficient() const;
>> 112 inline G4double GetTotalCross() const;
>> 113
>> 114 G4double McFcorrection(G4double);
>> 115 G4double RatioMottRutherford(G4double);
>> 116 G4double FormFactor2ExpHof(G4double);
>> 117 G4double FormFactor2Gauss(G4double);
>> 118 G4double FormFactor2UniformHelm(G4double);
>> 119 G4double GetScatteringAngle();
>> 120 G4double AngleDistribution(G4double);
>> 121
>> 122 private:
92 123
93 G4double NuclearCrossSection(G4int form, G4i << 124 G4ScreeningMottCrossSection & operator=(const G4ScreeningMottCrossSection &right) = delete;
94 G4double GetScatteringAngle(G4int form, G4in << 125 G4ScreeningMottCrossSection(const G4ScreeningMottCrossSection&) = delete;
95 126
96 G4double RatioMottRutherford(G4double tet); << 127 G4NistManager* fNistManager;
97 G4double RatioMottRutherfordCosT(G4double si << 128 G4Pow* fG4pow;
>> 129 G4MottCoefficients * mottcoeff;
>> 130
>> 131 G4double TotalCross;
>> 132
>> 133 //cost - min - max
>> 134 G4double cosThetaMin;// def 1.0
>> 135 G4double cosThetaMax;// def -1.0
>> 136
>> 137 G4double cosTetMinNuc;
>> 138 G4double cosTetMaxNuc;
>> 139
>> 140 //energy cut
>> 141 G4double ecut;
>> 142 G4double etag;
>> 143
>> 144 // projectile........................
>> 145 const G4ParticleDefinition* particle;
>> 146
>> 147 G4double spin;
>> 148 G4double mass;
>> 149
>> 150 //lab of incedent particle
>> 151 G4double tkinLab;
>> 152 G4double momLab2;
>> 153 G4double invbetaLab2;
>> 154
>> 155 //relative system with nucleus
>> 156 G4double mu_rel;
>> 157 G4double tkin;
>> 158 G4double mom2;
>> 159 G4double invbeta2;
>> 160 G4double beta;
>> 161 G4double gamma;
>> 162
>> 163 // target nucleus
>> 164 G4double targetZ;
>> 165 G4double targetA;
>> 166 G4double targetMass;
>> 167 G4double Trec;
>> 168 G4double As;
>> 169 G4double coeffb[5][6];
>> 170
>> 171 //constants
>> 172 G4double alpha;
>> 173 G4double htc2;
>> 174 G4double e2;
98 175
99 G4double McFcorrection(G4double sin2t2); << 176 //angle
100 inline void SetupParticle(const G4ParticleDe << 177 G4double cross[DIM];
>> 178 };
101 179
102 G4ScreeningMottCrossSection & operator= <<
103 (const G4ScreeningMottCrossSection &right) = <<
104 G4ScreeningMottCrossSection(const G4Screenin <<
105 180
106 private: << 181 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
107 182
108 G4double ComputeAngle(G4int idx, G4double& r << 183 inline void G4ScreeningMottCrossSection::SetupParticle(const G4ParticleDefinition* p)
>> 184 {
>> 185 particle = p;
>> 186 mass = particle->GetPDGMass();
>> 187 spin = particle->GetPDGSpin();
>> 188 if(0.0 != spin) { spin = 0.5; }
>> 189 tkin = 0.0;
>> 190 }
>> 191 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
109 192
110 G4double FormFactor2ExpHof(G4double sin2t2); <<
111 G4double FormFactor2Gauss(G4double sin2t2); <<
112 G4double FormFactor2UniformHelm(G4double sin <<
113 G4double DifferentialXSection(G4int idx, G4i <<
114 <<
115 G4double GetTransitionRandom(); <<
116 <<
117 G4NistManager* fNistManager; <<
118 G4Pow* fG4pow; <<
119 <<
120 const G4ParticleDefinition* particle; <<
121 <<
122 G4double fTotalCross; <<
123 //cost - min - max <<
124 G4double cosThetaMin;// def 1.0 <<
125 G4double cosThetaMax;// def -1. <<
126 <<
127 G4double cosTetMinNuc; <<
128 G4double cosTetMaxNuc; <<
129 <<
130 //energy cut <<
131 G4double ecut; <<
132 G4double etag; <<
133 <<
134 G4double spin; <<
135 G4double mass; <<
136 <<
137 //lab of incedent particle <<
138 G4double tkinLab; <<
139 G4double momLab2; <<
140 G4double invbetaLab2; <<
141 <<
142 //relative system with nucleus <<
143 G4double mu_rel; <<
144 G4double tkin; <<
145 G4double mom2; <<
146 G4double invbeta2; <<
147 G4double beta; <<
148 G4double gamma; <<
149 <<
150 //constants <<
151 G4double alpha; <<
152 G4double htc2; <<
153 G4double e2; <<
154 <<
155 // target nucleus <<
156 G4double targetMass; <<
157 G4double As; <<
158 G4int targetZ; <<
159 G4int targetA; <<
160 193
161 // working array << 194 inline G4double G4ScreeningMottCrossSection::GetMom2CM() const
162 std::vector<G4double> cross; << 195 {
163 }; << 196 return mom2;
>> 197 }
>> 198 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
164 199
165 200
>> 201 inline G4double G4ScreeningMottCrossSection::GetMom2Lab() const
>> 202 {
>> 203 return momLab2;
>> 204 }
>> 205
>> 206
>> 207 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 208
>> 209 inline G4double G4ScreeningMottCrossSection::GetTrec() const
>> 210 {
>> 211 return Trec;
>> 212 }
>> 213
166 //....oooOO0OOooo........oooOO0OOooo........oo 214 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
167 215
168 inline << 216 inline G4double G4ScreeningMottCrossSection::GetScreeningCoefficient() const
169 void G4ScreeningMottCrossSection::SetupParticl <<
170 { 217 {
171 particle = p; << 218 return As;
172 mass = particle->GetPDGMass(); << 219 }
173 spin = particle->GetPDGSpin(); << 220
174 if(0.0 != spin) { spin = 0.5; } << 221
175 tkin = 0.0; << 222 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 223
>> 224 inline G4double G4ScreeningMottCrossSection::GetTotalCross() const
>> 225 {
>> 226 return TotalCross;
176 } 227 }
177 228
178 //....oooOO0OOooo........oooOO0OOooo........oo 229 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
179 230
180 #endif 231 #endif
>> 232
>> 233
181 234