| 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: geant4-09-03-cand-01 $
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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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