Geant4 Cross Reference |
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These * 9 // * include a list of copyright holders. 9 // * include a list of copyright holders. * 10 // * 10 // * * 11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing * 12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this * 13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, * 14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its * 15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. * 17 // * 17 // * * 18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************* 24 // ******************************************************************** 25 // 25 // 26 // 26 // 27 // ------------------------------------------- 27 // ------------------------------------------------------------------- 28 // 28 // 29 // GEANT4 Class file 29 // GEANT4 Class file 30 // 30 // 31 // 31 // 32 // File name: G4VhElectronicStoppingPower 32 // File name: G4VhElectronicStoppingPower 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 // Low energy hadrons/ions electronic stopping 43 // Low energy hadrons/ions electronic stopping power parametrisation 44 // 44 // 45 // Class Description: End << 45 // Class Description: End 46 // 46 // 47 // ------------------------------------------- 47 // ------------------------------------------------------------------- 48 // 48 // 49 //....oooOO0OOooo........oooOO0OOooo........oo 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 50 50 51 #include "G4VhElectronicStoppingPower.hh" << 51 #include "G4VhElectronicStoppingPower.hh" 52 #include "G4SystemOfUnits.hh" << 53 #include "G4UnitsTable.hh" 52 #include "G4UnitsTable.hh" 54 #include "G4Exp.hh" << 55 53 56 //....oooOO0OOooo........oooOO0OOooo........oo 54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 57 55 58 G4VhElectronicStoppingPower::G4VhElectronicSto 56 G4VhElectronicStoppingPower::G4VhElectronicStoppingPower(): 59 theHeMassAMU(4.0026) 57 theHeMassAMU(4.0026) 60 {;} 58 {;} 61 59 62 //....oooOO0OOooo........oooOO0OOooo........oo 60 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 63 61 64 G4VhElectronicStoppingPower::~G4VhElectronicSt << 62 G4VhElectronicStoppingPower::~G4VhElectronicStoppingPower() 65 {;} 63 {;} 66 64 67 //....oooOO0OOooo........oooOO0OOooo........oo 65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 68 << 66 69 G4double G4VhElectronicStoppingPower::HeEffCha 67 G4double G4VhElectronicStoppingPower::HeEffChargeSquare( 70 const G4 << 68 const G4double z, 71 const G4 69 const G4double kineticEnergyHe) const 72 { 70 { 73 // The aproximation of He effective charge f << 71 // The aproximation of He effective charge from: 74 // J.F.Ziegler, J.P. Biersack, U. Littmark 72 // J.F.Ziegler, J.P. Biersack, U. Littmark 75 // The Stopping and Range of Ions in Matter, 73 // The Stopping and Range of Ions in Matter, 76 // Vol.1, Pergamon Press, 1985 74 // Vol.1, Pergamon Press, 1985 77 75 78 static const G4double c[6] = {0.2865, 0.126 << 76 static G4double c[6] = {0.2865, 0.1266, -0.001429, 79 0.02402,-0.01135, 0.001475} ; << 77 0.02402,-0.01135, 0.001475} ; 80 78 81 G4double e = std::log( std::max( 1.0, kineti << 79 G4double e = std::log( std::max( 1.0, kineticEnergyHe/(keV*GetHeMassAMU()))) ; 82 G4double x = c[0] ; 80 G4double x = c[0] ; 83 G4double y = 1.0 ; 81 G4double y = 1.0 ; 84 for (G4int i=1; i<6; i++) { 82 for (G4int i=1; i<6; i++) { 85 y *= e ; 83 y *= e ; 86 x += y * c[i] ; 84 x += y * c[i] ; 87 } 85 } 88 86 89 G4double w = 7.6 - e ; 87 G4double w = 7.6 - e ; 90 w = 1.0 + (0.007 + 0.00005*z) * G4Exp( -w*w << 88 w = 1.0 + (0.007 + 0.00005*z) * std::exp( -w*w ) ; 91 w = 4.0 * (1.0 - G4Exp(-x)) * w * w ; << 89 w = 4.0 * (1.0 - std::exp(-x)) * w * w ; 92 return w; 90 return w; 93 } 91 } 94 92