| Geant4 Cross Reference |
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25 // 25 //
26 // 26 //
27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class file 29 // GEANT4 Class file
30 // 30 //
31 // 31 //
32 // File name: G4hZiegler1985Nuclear 32 // File name: G4hZiegler1985Nuclear
33 // 33 //
34 // Author: V.Ivanchenko (Vladimir.Ivanc 34 // Author: V.Ivanchenko (Vladimir.Ivanchenko@cern.ch)
35 // 35 //
36 // Creation date: 20 July 2000 36 // Creation date: 20 July 2000
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 20/07/2000 V.Ivanchenko First implementati 39 // 20/07/2000 V.Ivanchenko First implementation
40 // 40 //
41 // Class Description: 41 // Class Description:
42 // 42 //
43 // Nuclear stopping power parametrised accordi 43 // Nuclear stopping power parametrised according to
44 // J.F.Ziegler, J.P. Biersack, U. Littmark 44 // J.F.Ziegler, J.P. Biersack, U. Littmark
45 // The Stopping and Range of Ions in Matter, 45 // The Stopping and Range of Ions in Matter,
46 // Vol.1, Pergamon Press, 1985 46 // Vol.1, Pergamon Press, 1985
47 // 47 //
48 // Class Description: End 48 // Class Description: End
49 // 49 //
50 // ------------------------------------------- 50 // -------------------------------------------------------------------
51 // 51 //
52 //....oooOO0OOooo........oooOO0OOooo........oo 52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
53 53
54 #include "G4hZiegler1985Nuclear.hh" 54 #include "G4hZiegler1985Nuclear.hh"
55 55
56 #include "globals.hh" 56 #include "globals.hh"
57 #include "Randomize.hh" 57 #include "Randomize.hh"
58 #include "G4SystemOfUnits.hh" 58 #include "G4SystemOfUnits.hh"
59 #include "G4UnitsTable.hh" 59 #include "G4UnitsTable.hh"
60 60
61 //....oooOO0OOooo........oooOO0OOooo........oo 61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
62 62
63 G4hZiegler1985Nuclear::G4hZiegler1985Nuclear() 63 G4hZiegler1985Nuclear::G4hZiegler1985Nuclear():G4VhNuclearStoppingPower()
64 {;} 64 {;}
65 65
66 //....oooOO0OOooo........oooOO0OOooo........oo 66 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
67 67
68 G4hZiegler1985Nuclear::~G4hZiegler1985Nuclear( 68 G4hZiegler1985Nuclear::~G4hZiegler1985Nuclear()
69 {;} 69 {;}
70 70
71 //....oooOO0OOooo........oooOO0OOooo........oo 71 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
72 72
73 G4double G4hZiegler1985Nuclear::NuclearStoppin 73 G4double G4hZiegler1985Nuclear::NuclearStoppingPower(G4double kineticEnergy,
74 G4double z1, G 74 G4double z1, G4double z2,
75 G4double m1, G 75 G4double m1, G4double m2Local) const
76 { 76 {
77 G4double energy = kineticEnergy/keV ; // en 77 G4double energy = kineticEnergy/keV ; // energy in keV
78 G4double ionloss ; 78 G4double ionloss ;
79 79
80 G4double rm = (m1 + m2Local) * ( std::pow(z1 80 G4double rm = (m1 + m2Local) * ( std::pow(z1, .23) + std::pow(z2, .23)) ;
81 81
82 G4double er = 32.536 * m2Local * energy / ( 82 G4double er = 32.536 * m2Local * energy / ( z1 * z2 * rm ) ; // reduced energy
83 83
84 if ( er <= 30 ) { 84 if ( er <= 30 ) {
85 ionloss = 0.5*std::log(1+1.1383*er)/ 85 ionloss = 0.5*std::log(1+1.1383*er)/
86 (er+0.01312*std::pow(er,0.21226)+ 86 (er+0.01312*std::pow(er,0.21226)+0.19593*std::sqrt(er)) ;
87 87
88 } else { 88 } else {
89 ionloss = 0.5*std::log(er)/er ; 89 ionloss = 0.5*std::log(er)/er ;
90 } 90 }
91 91
92 // Stragling 92 // Stragling
93 if(lossFlucFlag) { 93 if(lossFlucFlag) {
94 G4double sig = 4.0 * m1 * m2Local / ((m1 + 94 G4double sig = 4.0 * m1 * m2Local / ((m1 + m2Local)*(m1 + m2Local)*
95 (4.0 + 0.197*std::pow(er,-1. 95 (4.0 + 0.197*std::pow(er,-1.6991)+6.584*std::pow(er,-1.0494))) ;
96 96
97 ionloss *= G4RandGauss::shoot(1.0,sig) ; 97 ionloss *= G4RandGauss::shoot(1.0,sig) ;
98 } 98 }
99 99
100 ionloss *= 8.462 * z1 * z2 * m1 / rm ; // Re 100 ionloss *= 8.462 * z1 * z2 * m1 / rm ; // Return to [ev/(10^15 atoms/cm^2]
101 101
102 if ( ionloss < 0.0) ionloss = 0.0 ; 102 if ( ionloss < 0.0) ionloss = 0.0 ;
103 103
104 return ionloss; 104 return ionloss;
105 } 105 }
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111 111