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>> 26 // $Id$
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class header file 30 // GEANT4 Class header file
30 // 31 //
31 // 32 //
32 // File name: G4ionEffectiveCharge 33 // File name: G4ionEffectiveCharge
33 // 34 //
34 // Author: Vladimir Ivanchenko 35 // Author: Vladimir Ivanchenko
35 // 36 //
36 // Creation date: 03.07.2004 37 // Creation date: 03.07.2004
37 // 38 //
38 // Modifications: 39 // Modifications:
39 // 40 //
40 // 41 //
41 // Class Description: 42 // Class Description:
42 // 43 //
43 // This class manages the simulation of effect 44 // This class manages the simulation of effective charge of ions
44 // in the assumption of equilibrium between io 45 // in the assumption of equilibrium between ion shelss and media.
45 // J.F.Ziegler and J.M.Manoyan, The stopping o 46 // J.F.Ziegler and J.M.Manoyan, The stopping of ions in compaunds,
46 // Nucl. Inst. & Meth. in Phys. Res. B35 (1988 47 // Nucl. Inst. & Meth. in Phys. Res. B35 (1988) 215-228.
47 // 48 //
48 49
49 // ------------------------------------------- 50 // -------------------------------------------------------------------
50 // 51 //
51 52
52 #ifndef G4ionEffectiveCharge_h 53 #ifndef G4ionEffectiveCharge_h
53 #define G4ionEffectiveCharge_h 1 54 #define G4ionEffectiveCharge_h 1
54 55
55 #include "globals.hh" 56 #include "globals.hh"
56 #include "G4ParticleDefinition.hh" 57 #include "G4ParticleDefinition.hh"
57 58
58 class G4Material; 59 class G4Material;
59 class G4Pow; 60 class G4Pow;
60 61
61 class G4ionEffectiveCharge 62 class G4ionEffectiveCharge
62 { 63 {
63 64
64 public: 65 public:
65 66
66 explicit G4ionEffectiveCharge(); 67 explicit G4ionEffectiveCharge();
67 68
68 ~G4ionEffectiveCharge() = default; << 69 virtual ~G4ionEffectiveCharge();
69 70
70 G4double EffectiveChargeSquareRatio( 71 G4double EffectiveChargeSquareRatio(
71 const G4ParticleDef 72 const G4ParticleDefinition* p,
72 const G4Material* m 73 const G4Material* material,
73 G4double kineticEnergy); 74 G4double kineticEnergy);
74 75
75 G4double EffectiveCharge(const G4ParticleDef 76 G4double EffectiveCharge(const G4ParticleDefinition* p,
76 const G4Material* m 77 const G4Material* material,
77 G4double kineticEnergy); 78 G4double kineticEnergy);
78 79
>> 80 private:
>> 81
79 // hide assignment operator 82 // hide assignment operator
80 G4ionEffectiveCharge & operator=(const G4ion 83 G4ionEffectiveCharge & operator=(const G4ionEffectiveCharge &right) = delete;
81 G4ionEffectiveCharge(const G4ionEffectiveCha 84 G4ionEffectiveCharge(const G4ionEffectiveCharge&) = delete;
82 85
83 private: << 86 static const G4double inveplus;
84 <<
85 G4Pow* g4calc; 87 G4Pow* g4calc;
86 88
87 const G4ParticleDefinition* lastPart = nullp << 89 const G4ParticleDefinition* lastPart;
88 const G4Material* lastMat = nullpt << 90 const G4Material* lastMat;
89 <<
90 G4double inveplus; <<
91 G4double lastKinEnergy; 91 G4double lastKinEnergy;
92 92
93 G4double chargeCorrection 93 G4double chargeCorrection;
94 G4double effCharge; 94 G4double effCharge;
95 95
96 G4double energyHighLimit; 96 G4double energyHighLimit;
97 G4double energyLowLimit; 97 G4double energyLowLimit;
98 G4double energyBohr; 98 G4double energyBohr;
99 G4double massFactor; 99 G4double massFactor;
100 G4double minCharge; 100 G4double minCharge;
101 }; 101 };
102 102
103 //....oooOO0OOooo........oooOO0OOooo........oo 103 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
104 //....oooOO0OOooo........oooOO0OOooo........oo 104 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
105 105
106 inline G4double G4ionEffectiveCharge::Effectiv 106 inline G4double G4ionEffectiveCharge::EffectiveChargeSquareRatio(
107 const G4ParticleDef 107 const G4ParticleDefinition* p,
108 const G4Material* m 108 const G4Material* material,
109 G4double kineticEnergy) 109 G4double kineticEnergy)
110 { 110 {
111 const G4double aCharge = << 111 G4double charge = effCharge;
112 EffectiveCharge(p,material,kineticEnergy)* << 112 if( kineticEnergy != lastKinEnergy || material != lastMat || p != lastPart) {
113 return aCharge*aCharge; << 113 charge = EffectiveCharge(p,material,kineticEnergy);
>> 114 }
>> 115 charge *= chargeCorrection*inveplus;
>> 116
>> 117 return charge*charge;
114 } 118 }
115 119
116 //....oooOO0OOooo........oooOO0OOooo........oo 120 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
117 121
118 #endif 122 #endif
119 123