1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // $Id: G4ionEffectiveCharge.hh,v 1.12 2008/09/20 19:39:34 vnivanch Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
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28 | // |
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29 | // ------------------------------------------------------------------- |
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30 | // |
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31 | // GEANT4 Class header file |
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32 | // |
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33 | // |
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34 | // File name: G4ionEffectiveCharge |
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35 | // |
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36 | // Author: Vladimir Ivanchenko |
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37 | // |
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38 | // Creation date: 03.07.2004 |
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39 | // |
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40 | // Modifications: |
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41 | // |
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42 | // |
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43 | // Class Description: |
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44 | // |
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45 | // This class manages the simulation of effective charge of ions |
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46 | // in the assumption of equilibrium between ion shelss and media. |
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47 | // J.F.Ziegler and J.M.Manoyan, The stopping of ions in compaunds, |
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48 | // Nucl. Inst. & Meth. in Phys. Res. B35 (1988) 215-228. |
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49 | // |
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50 | |
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51 | // ------------------------------------------------------------------- |
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52 | // |
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53 | |
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54 | #ifndef G4ionEffectiveCharge_h |
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55 | #define G4ionEffectiveCharge_h 1 |
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56 | |
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57 | #include "globals.hh" |
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58 | #include "G4ParticleDefinition.hh" |
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59 | |
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60 | class G4Material; |
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61 | class G4NistManager; |
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62 | |
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63 | class G4ionEffectiveCharge |
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64 | { |
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65 | |
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66 | public: |
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67 | |
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68 | G4ionEffectiveCharge(); |
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69 | |
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70 | virtual ~G4ionEffectiveCharge(); |
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71 | |
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72 | G4double EffectiveChargeSquareRatio( |
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73 | const G4ParticleDefinition* p, |
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74 | const G4Material* material, |
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75 | G4double kineticEnergy); |
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76 | |
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77 | G4double EffectiveCharge(const G4ParticleDefinition* p, |
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78 | const G4Material* material, |
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79 | G4double kineticEnergy); |
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80 | |
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81 | private: |
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82 | |
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83 | // hide assignment operator |
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84 | G4ionEffectiveCharge & operator=(const G4ionEffectiveCharge &right); |
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85 | G4ionEffectiveCharge(const G4ionEffectiveCharge&); |
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86 | |
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87 | G4NistManager* nist; |
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88 | |
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89 | const G4ParticleDefinition* lastPart; |
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90 | const G4Material* lastMat; |
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91 | G4double lastKinEnergy; |
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92 | |
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93 | G4double chargeCorrection; |
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94 | G4double effCharge; |
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95 | |
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96 | G4double energyHighLimit; |
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97 | G4double energyLowLimit; |
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98 | G4double energyBohr; |
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99 | G4double massFactor; |
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100 | G4double minCharge; |
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101 | }; |
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102 | |
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103 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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104 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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105 | |
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106 | inline G4double G4ionEffectiveCharge::EffectiveChargeSquareRatio( |
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107 | const G4ParticleDefinition* p, |
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108 | const G4Material* material, |
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109 | G4double kineticEnergy) |
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110 | { |
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111 | G4double charge = effCharge; |
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112 | if( kineticEnergy != lastKinEnergy || material != lastMat || p != lastPart) { |
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113 | charge = EffectiveCharge(p,material,kineticEnergy); |
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114 | } |
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115 | charge *= chargeCorrection/CLHEP::eplus; |
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116 | |
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117 | return charge*charge; |
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118 | } |
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119 | |
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120 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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121 | |
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122 | #endif |
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