1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | // G4IonCoulombCrossSection.hh |
---|
27 | //------------------------------------------------------------------- |
---|
28 | // |
---|
29 | // GEANT4 Class header file |
---|
30 | // |
---|
31 | // File name: G4IonCoulombCrossSection |
---|
32 | // |
---|
33 | // Author: Cristina Consolandi |
---|
34 | // |
---|
35 | // Creation date: 05.10.2010 from G4eCoulombScatteringModel |
---|
36 | // |
---|
37 | // Class Description: |
---|
38 | // Computation of Screen-Coulomb Cross Section |
---|
39 | // for protons, alpha and heavy Ions |
---|
40 | // |
---|
41 | // |
---|
42 | // Reference: |
---|
43 | // M.J. Boschini et al. "Nuclear and Non-Ionizing Energy-Loss |
---|
44 | // for Coulomb Scattered Particles from Low Energy up to Relativistic |
---|
45 | // Regime in Space Radiation Environment" |
---|
46 | // Accepted for publication in the Proceedings of the ICATPP Conference |
---|
47 | // on Cosmic Rays for Particle and Astroparticle Physics, Villa Olmo, 7-8 |
---|
48 | // October, 2010, to be published by World Scientific (Singapore). |
---|
49 | // |
---|
50 | // Available for downloading at: |
---|
51 | // http://arxiv.org/abs/1011.4822 |
---|
52 | // |
---|
53 | // ------------------------------------------------------------------- |
---|
54 | |
---|
55 | // |
---|
56 | #ifndef G4IonCoulombCrossSection_h |
---|
57 | #define G4IonCoulombCrossSection_h 1 |
---|
58 | |
---|
59 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
60 | |
---|
61 | #include "globals.hh" |
---|
62 | #include "G4Material.hh" |
---|
63 | #include "G4Element.hh" |
---|
64 | #include "G4ElementVector.hh" |
---|
65 | #include "G4NistManager.hh" |
---|
66 | #include "G4ThreeVector.hh" |
---|
67 | #include "G4Pow.hh" |
---|
68 | #include "G4LossTableManager.hh" |
---|
69 | |
---|
70 | class G4ParticleDefinition; |
---|
71 | |
---|
72 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
73 | |
---|
74 | class G4IonCoulombCrossSection |
---|
75 | { |
---|
76 | |
---|
77 | public: |
---|
78 | |
---|
79 | G4IonCoulombCrossSection(); |
---|
80 | |
---|
81 | virtual ~G4IonCoulombCrossSection(); |
---|
82 | |
---|
83 | void Initialise(const G4ParticleDefinition*, G4double cosThetaLim); |
---|
84 | |
---|
85 | G4double NuclearCrossSection(); |
---|
86 | |
---|
87 | G4double SampleCosineTheta(); |
---|
88 | |
---|
89 | inline void SetupParticle(const G4ParticleDefinition*); |
---|
90 | |
---|
91 | void SetupKinematic(G4double kinEnergy, G4double cut,G4int iz); |
---|
92 | |
---|
93 | void SetupTarget(G4double Z, G4double kinEnergy,G4int heavycorr); |
---|
94 | |
---|
95 | inline G4double GetMomentum2(); |
---|
96 | |
---|
97 | private: |
---|
98 | void SetScreenRSquare(G4int iz); |
---|
99 | |
---|
100 | |
---|
101 | G4IonCoulombCrossSection & operator=(const G4IonCoulombCrossSection &right); |
---|
102 | G4IonCoulombCrossSection(const G4IonCoulombCrossSection&); |
---|
103 | |
---|
104 | |
---|
105 | |
---|
106 | const G4ParticleDefinition* theProton; |
---|
107 | |
---|
108 | G4NistManager* fNistManager; |
---|
109 | |
---|
110 | protected: |
---|
111 | G4double coeff; |
---|
112 | |
---|
113 | //cost - min - max |
---|
114 | G4double cosThetaMin;// def 1.0 |
---|
115 | G4double cosThetaMax;// def -1.0 |
---|
116 | |
---|
117 | //SetupTarget |
---|
118 | G4double cosTetMinNuc;// -->cosThetaMin |
---|
119 | G4double cosTetMaxNuc;// -->cosThetaMax |
---|
120 | |
---|
121 | |
---|
122 | //cross section |
---|
123 | G4double nucXSection; |
---|
124 | |
---|
125 | //energy cut |
---|
126 | G4double ecut; |
---|
127 | G4double etag; |
---|
128 | |
---|
129 | // projectile........................ |
---|
130 | const G4ParticleDefinition* particle; |
---|
131 | |
---|
132 | G4double chargeSquare; |
---|
133 | G4double spin; |
---|
134 | G4double mass; |
---|
135 | |
---|
136 | //lab of incedent particle |
---|
137 | G4double tkinLab; |
---|
138 | G4double momLab2; |
---|
139 | G4double invbetaLab2; |
---|
140 | |
---|
141 | //relative system with nucleus |
---|
142 | G4double tkin; |
---|
143 | G4double mom2; |
---|
144 | G4double invbeta2; |
---|
145 | |
---|
146 | // target nucleus |
---|
147 | G4double targetZ; |
---|
148 | G4double targetMass; |
---|
149 | G4double screenZ; |
---|
150 | |
---|
151 | |
---|
152 | private: |
---|
153 | |
---|
154 | G4double alpha2; |
---|
155 | G4double ScreenRSquare; |
---|
156 | |
---|
157 | }; |
---|
158 | |
---|
159 | |
---|
160 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
161 | |
---|
162 | inline void G4IonCoulombCrossSection::SetupParticle(const G4ParticleDefinition* p) |
---|
163 | { |
---|
164 | particle = p; |
---|
165 | mass = particle->GetPDGMass(); |
---|
166 | spin = particle->GetPDGSpin(); |
---|
167 | if(0.0 != spin) { spin = 0.5; } |
---|
168 | G4double q = std::fabs(particle->GetPDGCharge()/eplus); |
---|
169 | chargeSquare = q*q; |
---|
170 | tkin = 0.0; |
---|
171 | } |
---|
172 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
173 | |
---|
174 | |
---|
175 | inline G4double G4IonCoulombCrossSection::GetMomentum2(){ |
---|
176 | return mom2; |
---|
177 | } |
---|
178 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
179 | |
---|
180 | #endif |
---|
181 | |
---|
182 | |
---|