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28 // ===========================================
29 // GEANT4 class header file
30 //
31 // Class: G4IonDEDXScalingICRU7
32 //
33 // Base class: G4VIonDEDXScalingAlgo
34 //
35 // Author: Anton Lechner (Anton.
36 //
37 // First implementation: 10. 05. 2009
38 //
39 // Modifications: 12. 11. 2009 - Moved all dec
40 // scaling for h
41 // Adapting Scal
42 // to changes in
43 //
44 // Class description:
45 // dE/dx scaling algorithm applied on top o
46 // covered by the ICRU 73 report)
47 //
48 // Comments:
49 //
50 // ===========================================
51
52 #ifndef G4IONDEDXSCALINGICRU73_HH
53 #define G4IONDEDXSCALINGICRU73_HH
54
55 #include "globals.hh"
56 #include "G4VIonDEDXScalingAlgorithm.hh"
57 #include "G4Material.hh"
58 #include "G4ParticleDefinition.hh"
59 #include <vector>
60 #include "G4Exp.hh"
61
62 class G4IonDEDXScalingICRU73 : public G4VIonDE
63
64 public:
65 explicit G4IonDEDXScalingICRU73(G4int minAto
66 G4int maxAtomicNumberIon = 102);
67 ~G4IonDEDXScalingICRU73();
68
69 // Function for scaling the kinetic energy (
70 // Returns scaling factor for a given ion.
71 G4double ScalingFactorEnergy(
72 const G4ParticleDefinition* parti
73 const G4Material* material) overr
74
75
76 // Function for scaling the dE/dx value (no
77 // Returns scaling factor for a given ion-m
78 // a given kinetic energy.
79 G4double ScalingFactorDEDX(
80 const G4ParticleDefinition* parti
81 const G4Material*,
82 G4double kineticEnergy) override;
83
84
85 // Function for defining a base particle fo
86 // (no base particle by default). Returns a
87 // particle.
88 G4int AtomicNumberBaseIon(
89 G4int atomicNumberIon,
90 const G4Material*) override;
91
92 private:
93 void UpdateCacheParticle(
94 const G4ParticleDefinition* parti
95
96 void UpdateCacheMaterial(
97 const G4Material* material);
98
99 void CreateReferenceParticles();
100
101 G4double EquilibriumCharge(
102 G4double mass,
103 G4double charge,
104 G4double atomicNumberPow,
105 G4double kineticEnergy);
106
107 // Scaling is only applied for ions with at
108 // defined by the following parameters:
109 G4int minAtomicNumber;
110 G4int maxAtomicNumber;
111
112 G4bool referencePrepared;
113
114 // Some properties of reference particle (F
115 ///////////////////////////G4ParticleDefini
116 G4int atomicNumberRefFe;
117 G4int massNumberRefFe;
118 G4double atomicNumberRefPow23Fe;
119 G4double chargeRefFe;
120 G4double massRefFe;
121
122 // Some properties of reference particle (A
123 ///////////////////////////G4ParticleDefini
124 G4int atomicNumberRefAr;
125 G4int massNumberRefAr;
126 G4double atomicNumberRefPow23Ar;
127 G4double chargeRefAr;
128 G4double massRefAr;
129
130 // Flag indicating the use of Fe ions as re
131 G4bool useFe;
132
133 // Some properties of projectiles are store
134 const G4ParticleDefinition* cacheParticle;
135 G4int cacheMassNumber;
136 G4int cacheAtomicNumber;
137 G4double cacheAtomicNumberPow23;
138 G4double cacheCharge;
139 G4double cacheMass;
140
141 // Material pointer
142 const G4Material* cacheMaterial;
143 };
144
145 // ###########################################
146
147 inline void G4IonDEDXScalingICRU73::UpdateCach
148 const G4ParticleDefinition* partic
149
150 if(particle != cacheParticle) {
151
152 cacheParticle = particle;
153 cacheAtomicNumber = particle -> GetAtomic
154 cacheMassNumber = particle -> GetAtomicMa
155 cacheCharge = particle -> GetPDGCharge();
156 cacheMass = particle -> GetPDGMass();
157 cacheAtomicNumberPow23 = std::pow(G4doubl
158 }
159 }
160
161 // ###########################################
162
163 inline void G4IonDEDXScalingICRU73::UpdateCach
164 const G4Material* material) {
165
166 if(cacheMaterial != material) {
167
168 cacheMaterial = material;
169
170 useFe = true;
171
172 size_t nmbElements = material -> GetNumbe
173 if( nmbElements > 1 ) useFe = false;
174
175 if( material -> GetName() == "G4_WATER" )
176 }
177 }
178
179 // ###########################################
180
181 inline G4double G4IonDEDXScalingICRU73::Equili
182 G4double m
183 G4double c
184 G4double a
185 G4double k
186
187 G4double totalEnergy = kineticEnergy + mass
188 G4double betaSquared = kineticEnergy *
189 (totalEnergy + mass) / (tota
190
191 G4double beta = std::sqrt( betaSquared );
192
193 G4double velOverBohrVel = beta / CLHEP::fine
194
195 G4double q1 = 1.0 - G4Exp(-velOverBohrVel /
196
197 return q1 * charge;
198 }
199
200 // ###########################################
201
202 #endif
203