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25 // 25 //
>> 26 // $Id: G4ElectronIonPair.hh,v 1.5 2010-10-25 17:23:01 vnivanch Exp $
>> 27 // GEANT4 tag $Name: not supported by cvs2svn $
>> 28 //
>> 29 //
26 #ifndef G4ElectronIonPair_h 30 #ifndef G4ElectronIonPair_h
27 #define G4ElectronIonPair_h 1 31 #define G4ElectronIonPair_h 1
28 32
29 // ------------------------------------------- 33 // -------------------------------------------------------------
30 // 34 //
31 // GEANT4 Class header file 35 // GEANT4 Class header file
32 // 36 //
33 // 37 //
34 // File name: G4ElectronIonPair 38 // File name: G4ElectronIonPair
35 // 39 //
36 // Author: Vladimir Ivanchenko 40 // Author: Vladimir Ivanchenko
37 // 41 //
38 // Creation date: 08.07.2008 42 // Creation date: 08.07.2008
39 // 43 //
40 // Modifications: 44 // Modifications:
41 // 45 //
42 // 46 //
43 // Class Description: 47 // Class Description:
44 // Compution on number of electon-ion or ele 48 // Compution on number of electon-ion or electorn-hole pairs
45 // at the step of a particle and sampling io 49 // at the step of a particle and sampling ionisation points
46 // in space 50 // in space
47 // 51 //
48 // Based on ICRU Report 31, 1979 52 // Based on ICRU Report 31, 1979
49 // "Average Energy Required to Produce an Ion 53 // "Average Energy Required to Produce an Ion Pair"
50 // 54 //
51 // 06.04.2010 V. Grichine, substitute Gauss by 55 // 06.04.2010 V. Grichine, substitute Gauss by Gamma for ionisation
52 // distribution at fix 56 // distribution at fixed energy deposition
53 // 57 //
54 // ------------------------------------------- 58 // -------------------------------------------------------------
55 59
56 //....oooOO0OOooo........oooOO0OOooo........oo 60 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
57 //....oooOO0OOooo........oooOO0OOooo........oo 61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
58 62
59 #include "globals.hh" 63 #include "globals.hh"
60 #include "G4Step.hh" 64 #include "G4Step.hh"
61 #include "G4ParticleDefinition.hh" 65 #include "G4ParticleDefinition.hh"
62 #include "G4ThreeVector.hh" 66 #include "G4ThreeVector.hh"
63 #include "G4VProcess.hh" 67 #include "G4VProcess.hh"
64 #include "Randomize.hh" <<
65 #include <vector> 68 #include <vector>
66 69
67 //....oooOO0OOooo........oooOO0OOooo........oo 70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
68 71
69 class G4Material; 72 class G4Material;
70 73
71 class G4ElectronIonPair 74 class G4ElectronIonPair
72 { 75 {
73 public: 76 public:
74 77
75 explicit G4ElectronIonPair(G4int verb); << 78 G4ElectronIonPair();
76 79
77 virtual ~G4ElectronIonPair(); 80 virtual ~G4ElectronIonPair();
78 81
79 // compute mean number of ionisation points 82 // compute mean number of ionisation points at a step
80 G4double MeanNumberOfIonsAlongStep(const G4P 83 G4double MeanNumberOfIonsAlongStep(const G4ParticleDefinition*,
81 const G4Material*, 84 const G4Material*,
82 G4double edepTotal, 85 G4double edepTotal,
83 G4double edepNIEL = 0.0); 86 G4double edepNIEL = 0.0);
84 87
85 inline G4double MeanNumberOfIonsAlongStep(co 88 inline G4double MeanNumberOfIonsAlongStep(const G4Step*);
86 89
87 inline G4int SampleNumberOfIonsAlongStep(con 90 inline G4int SampleNumberOfIonsAlongStep(const G4Step*);
88 91
89 // returns pointer to the new vector of posi 92 // returns pointer to the new vector of positions of
90 // ionisation points in the World coordinate 93 // ionisation points in the World coordinate system
91 std::vector<G4ThreeVector>* SampleIonsAlongS 94 std::vector<G4ThreeVector>* SampleIonsAlongStep(const G4Step*);
92 95
93 // compute number of holes in the atom after 96 // compute number of holes in the atom after PostStep interaction
94 G4int ResidualeChargePostStep(const G4Partic 97 G4int ResidualeChargePostStep(const G4ParticleDefinition*,
95 const G4TrackVector* secondary = nullp << 98 const G4TrackVector* secondary = 0,
96 G4int processSubType = -1) const; << 99 G4int processSubType = -1);
97 100
98 inline G4int ResidualeChargePostStep(const G << 101 inline G4int ResidualeChargePostStep(const G4Step*);
99 102
100 // find mean energies per ionisation 103 // find mean energies per ionisation
101 G4double FindG4MeanEnergyPerIonPair(const G4 << 104 G4double FindG4MeanEnergyPerIonPair(const G4Material*);
102 105
103 // dump mean energies per ionisation used in 106 // dump mean energies per ionisation used in run time
104 void DumpMeanEnergyPerIonPair() const; << 107 void DumpMeanEnergyPerIonPair();
105 108
106 // dump G4 list 109 // dump G4 list
107 void DumpG4MeanEnergyPerIonPair() const; << 110 void DumpG4MeanEnergyPerIonPair();
108 111
109 inline void SetVerbose(G4int); 112 inline void SetVerbose(G4int);
110 113
111 // hide assignment operator <<
112 G4ElectronIonPair & operator=(const G4Electr <<
113 G4ElectronIonPair(const G4ElectronIonPair&) <<
114 <<
115 private: 114 private:
116 115
117 void Initialise(); 116 void Initialise();
118 117
119 G4double FindMeanEnergyPerIonPair(const G4Ma << 118 G4double FindMeanEnergyPerIonPair(const G4Material*);
120 119
121 // cache << 120 // hide assignment operator
>> 121 G4ElectronIonPair & operator=(const G4ElectronIonPair &right);
>> 122 G4ElectronIonPair(const G4ElectronIonPair&);
>> 123
>> 124 // cash
122 const G4Material* curMaterial; 125 const G4Material* curMaterial;
123 G4double curMeanEnergy; 126 G4double curMeanEnergy;
124 127
125 G4double invFanoFactor; << 128 G4double FanoFactor;
126 129
127 G4int verbose; 130 G4int verbose;
128 G4int nMaterials; 131 G4int nMaterials;
129 132
130 // list of G4 NIST materials with mean energ 133 // list of G4 NIST materials with mean energy per ion defined
131 std::vector<G4double> g4MatData; 134 std::vector<G4double> g4MatData;
132 std::vector<G4String> g4MatNames; 135 std::vector<G4String> g4MatNames;
133 }; 136 };
134 137
135 inline G4double 138 inline G4double
136 G4ElectronIonPair::MeanNumberOfIonsAlongStep(c << 139 G4ElectronIonPair::MeanNumberOfIonsAlongStep(const G4Step* step)
137 { 140 {
138 return MeanNumberOfIonsAlongStep(step->GetTr 141 return MeanNumberOfIonsAlongStep(step->GetTrack()->GetParticleDefinition(),
139 step->GetPreStepPoint()->GetMateria 142 step->GetPreStepPoint()->GetMaterial(),
140 step->GetTotalEnergyDeposit(), 143 step->GetTotalEnergyDeposit(),
141 step->GetNonIonizingEnergyDeposit() 144 step->GetNonIonizingEnergyDeposit());
142 } 145 }
143 146
144 inline G4int << 147 inline
145 G4ElectronIonPair::SampleNumberOfIonsAlongStep << 148 G4int G4ElectronIonPair::SampleNumberOfIonsAlongStep(const G4Step* step)
146 { 149 {
147 // use gamma distribution with mean value n= <<
148 // dispersion D=meanion/invFanoFactor <<
149 G4double meanion = MeanNumberOfIonsAlongStep 150 G4double meanion = MeanNumberOfIonsAlongStep(step);
150 return G4lrint(G4RandGamma::shoot(meanion*in << 151 G4double lambda = 1./FanoFactor;
>> 152 G4double a = meanion*lambda;
>> 153
>> 154 // old Gauss implementation
>> 155 // G4double sig = FanoFactor*std::sqrt(meanion);
>> 156 // G4int nion = G4int(G4RandGauss::shoot(meanion,sig) + 0.5);
>> 157
>> 158 G4int nion = G4int(CLHEP::RandGamma::shoot(a,lambda) + 0.5);
>> 159 return nion;
151 } 160 }
152 161
153 inline G4int << 162 inline
154 G4ElectronIonPair::ResidualeChargePostStep(con << 163 G4int G4ElectronIonPair::ResidualeChargePostStep(const G4Step* step)
155 { 164 {
156 G4int subtype = -1; 165 G4int subtype = -1;
157 const G4VProcess* proc = step->GetPostStepPo 166 const G4VProcess* proc = step->GetPostStepPoint()->GetProcessDefinedStep();
158 if(proc) { subtype = proc->GetProcessSubType 167 if(proc) { subtype = proc->GetProcessSubType(); }
159 return ResidualeChargePostStep(step->GetTrac 168 return ResidualeChargePostStep(step->GetTrack()->GetParticleDefinition(),
160 step->GetSecondary(), 169 step->GetSecondary(),
161 subtype); 170 subtype);
162 } 171 }
163 172
164 inline void G4ElectronIonPair::SetVerbose(G4in 173 inline void G4ElectronIonPair::SetVerbose(G4int val)
165 { 174 {
166 verbose = val; 175 verbose = val;
167 } 176 }
168 177
169 #endif 178 #endif
170 179
171 180