| Geant4 Cross Reference |
1 // 1 //
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15 // * use. Please see the license in the file << 14 // * use. *
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19 // * technical work of the GEANT4 collaboratio << 17 // * GEANT4 collaboration. *
20 // * By using, copying, modifying or distri << 18 // * By copying, distributing or modifying the Program (or any work *
21 // * any work based on the software) you ag << 19 // * based on the Program) you indicate your acceptance of this *
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23 // * acceptance of all terms of the Geant4 Sof <<
24 // ******************************************* 21 // ********************************************************************
25 // 22 //
26 // 23 //
27 // ------------------------------------------- 24 // -------------------------------------------------------------------
28 // 25 //
29 // GEANT4 Class file 26 // GEANT4 Class file
30 // 27 //
31 // 28 //
32 // File name: G4VhElectronicStoppingPower 29 // File name: G4VhElectronicStoppingPower
33 // 30 //
34 // Author: V.Ivanchenko (Vladimir.Ivanc 31 // Author: V.Ivanchenko (Vladimir.Ivanchenko@cern.ch)
35 // << 32 //
36 // Creation date: 20 July 2000 33 // Creation date: 20 July 2000
37 // 34 //
38 // Modifications: << 35 // Modifications:
39 // 20/07/2000 V.Ivanchenko First implementati 36 // 20/07/2000 V.Ivanchenko First implementation
40 // 37 //
41 // Class Description: << 38 // Class Description:
42 // 39 //
43 // Low energy hadrons/ions electronic stopping 40 // Low energy hadrons/ions electronic stopping power parametrisation
44 // 41 //
45 // Class Description: End << 42 // Class Description: End
46 // 43 //
47 // ------------------------------------------- 44 // -------------------------------------------------------------------
48 // 45 //
49 //....oooOO0OOooo........oooOO0OOooo........oo 46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
50 47
51 #include "G4VhElectronicStoppingPower.hh" << 48 #include "G4VhElectronicStoppingPower.hh"
52 #include "G4SystemOfUnits.hh" <<
53 #include "G4UnitsTable.hh" 49 #include "G4UnitsTable.hh"
54 #include "G4Exp.hh" <<
55 50
56 //....oooOO0OOooo........oooOO0OOooo........oo 51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
57 52
58 G4VhElectronicStoppingPower::G4VhElectronicSto 53 G4VhElectronicStoppingPower::G4VhElectronicStoppingPower():
59 theHeMassAMU(4.0026) 54 theHeMassAMU(4.0026)
60 {;} 55 {;}
61 56
62 //....oooOO0OOooo........oooOO0OOooo........oo 57 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
63 58
64 G4VhElectronicStoppingPower::~G4VhElectronicSt << 59 G4VhElectronicStoppingPower::~G4VhElectronicStoppingPower()
65 {;} 60 {;}
66 61
67 //....oooOO0OOooo........oooOO0OOooo........oo 62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
68 << 63
69 G4double G4VhElectronicStoppingPower::HeEffCha 64 G4double G4VhElectronicStoppingPower::HeEffChargeSquare(
70 const G4 << 65 const G4double z,
71 const G4 66 const G4double kineticEnergyHe) const
72 { 67 {
73 // The aproximation of He effective charge f << 68 // The aproximation of He effective charge from:
74 // J.F.Ziegler, J.P. Biersack, U. Littmark 69 // J.F.Ziegler, J.P. Biersack, U. Littmark
75 // The Stopping and Range of Ions in Matter, 70 // The Stopping and Range of Ions in Matter,
76 // Vol.1, Pergamon Press, 1985 71 // Vol.1, Pergamon Press, 1985
77 72
78 static const G4double c[6] = {0.2865, 0.126 << 73 static G4double c[6] = {0.2865, 0.1266, -0.001429,
79 0.02402,-0.01135, 0.001475} ; << 74 0.02402,-0.01135, 0.001475} ;
80 75
81 G4double e = std::log( std::max( 1.0, kineti << 76 G4double e = log( G4std::max( 1.0, kineticEnergyHe/(keV*GetHeMassAMU()))) ;
82 G4double x = c[0] ; 77 G4double x = c[0] ;
83 G4double y = 1.0 ; 78 G4double y = 1.0 ;
84 for (G4int i=1; i<6; i++) { 79 for (G4int i=1; i<6; i++) {
85 y *= e ; 80 y *= e ;
86 x += y * c[i] ; 81 x += y * c[i] ;
87 } 82 }
88 83
89 G4double w = 7.6 - e ; 84 G4double w = 7.6 - e ;
90 w = 1.0 + (0.007 + 0.00005*z) * G4Exp( -w*w << 85 w = 1.0 + (0.007 + 0.00005*z) * exp( -w*w ) ;
91 w = 4.0 * (1.0 - G4Exp(-x)) * w * w ; << 86 w = 4.0 * (1.0 - exp(-x)) * w * w ;
>> 87
92 return w; 88 return w;
93 } 89 }
94 90