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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class header file
30 //
31 //
32 // File name: G4ionEffectiveCharge
33 //
34 // Author: Vladimir Ivanchenko
35 //
36 // Creation date: 03.07.2004
37 //
38 // Modifications:
39 //
40 //
41 // Class Description:
42 //
43 // This class manages the simulation of effective charge of ions
44 // in the assumption of equilibrium between ion shelss and media.
45 // J.F.Ziegler and J.M.Manoyan, The stopping of ions in compaunds,
46 // Nucl. Inst. & Meth. in Phys. Res. B35 (1988) 215-228.
47 //
48
49 // -------------------------------------------------------------------
50 //
51
52 #ifndef G4ionEffectiveCharge_h
53 #define G4ionEffectiveCharge_h 1
54
55 #include "globals.hh"
56 #include "G4ParticleDefinition.hh"
57
58 class G4Material;
59 class G4Pow;
60
61 class G4ionEffectiveCharge
62 {
63
64 public:
65
66 explicit G4ionEffectiveCharge();
67
68 ~G4ionEffectiveCharge() = default;
69
70 G4double EffectiveChargeSquareRatio(
71 const G4ParticleDefinition* p,
72 const G4Material* material,
73 G4double kineticEnergy);
74
75 G4double EffectiveCharge(const G4ParticleDefinition* p,
76 const G4Material* material,
77 G4double kineticEnergy);
78
79 // hide assignment operator
80 G4ionEffectiveCharge & operator=(const G4ionEffectiveCharge &right) = delete;
81 G4ionEffectiveCharge(const G4ionEffectiveCharge&) = delete;
82
83 private:
84
85 G4Pow* g4calc;
86
87 const G4ParticleDefinition* lastPart = nullptr;
88 const G4Material* lastMat = nullptr;
89
90 G4double inveplus;
91 G4double lastKinEnergy;
92
93 G4double chargeCorrection;
94 G4double effCharge;
95
96 G4double energyHighLimit;
97 G4double energyLowLimit;
98 G4double energyBohr;
99 G4double massFactor;
100 G4double minCharge;
101 };
102
103 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
104 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
105
106 inline G4double G4ionEffectiveCharge::EffectiveChargeSquareRatio(
107 const G4ParticleDefinition* p,
108 const G4Material* material,
109 G4double kineticEnergy)
110 {
111 const G4double aCharge =
112 EffectiveCharge(p,material,kineticEnergy)*chargeCorrection*inveplus;
113 return aCharge*aCharge;
114 }
115
116 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
117
118 #endif
119