include/Geant4/G4ionEffectiveCharge.hh

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
0004 // *                                                                  *
0005 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
0006 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
0007 // * conditions of the Geant4 Software License,  included in the file *
0008 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
0009 // * include a list of copyright holders.                             *
0010 // *                                                                  *
0011 // * Neither the authors of this software system, nor their employing *
0012 // * institutes,nor the agencies providing financial support for this *
0013 // * work  make  any representation or  warranty, express or implied, *
0014 // * regarding  this  software system or assume any liability for its *
0015 // * use.  Please see the license in the file  LICENSE  and URL above *
0016 // * for the full disclaimer and the limitation of liability.         *
0017 // *                                                                  *
0018 // * This  code  implementation is the result of  the  scientific and *
0019 // * technical work of the GEANT4 collaboration.                      *
0020 // * By using,  copying,  modifying or  distributing the software (or *
0021 // * any work based  on the software)  you  agree  to acknowledge its *
0022 // * use  in  resulting  scientific  publications,  and indicate your *
0023 // * acceptance of all terms of the Geant4 Software license.          *
0024 // ********************************************************************
0025 //
0026 //
0027 // -------------------------------------------------------------------
0028 //
0029 // GEANT4 Class header file
0030 //
0031 //
0032 // File name:     G4ionEffectiveCharge
0033 //
0034 // Author:        Vladimir Ivanchenko
0035 //
0036 // Creation date: 03.07.2004
0037 //
0038 // Modifications:
0039 //
0040 //
0041 // Class Description:
0042 //
0043 // This class manages the simulation of effective charge of ions
0044 // in the assumption of equilibrium between ion shelss and media.
0045 // J.F.Ziegler and J.M.Manoyan, The stopping of ions in compaunds,
0046 // Nucl. Inst. & Meth. in Phys. Res. B35 (1988) 215-228.
0047 //
0048
0049 // -------------------------------------------------------------------
0050 //
0051
0052 #ifndef G4ionEffectiveCharge_h
0053 #define G4ionEffectiveCharge_h 1
0054
0055 #include "globals.hh"
0056 #include "G4ParticleDefinition.hh"
0057
0058 class G4Material;
0059 class G4Pow;
0060
0061 class G4ionEffectiveCharge
0062 {
0063
0064 public:
0065
0066   explicit G4ionEffectiveCharge();
0067
0068   ~G4ionEffectiveCharge() = default;
0069
0070   G4double EffectiveChargeSquareRatio(
0071                            const G4ParticleDefinition* p,
0072                            const G4Material* material,
0073                      G4double kineticEnergy);
0074
0075   G4double EffectiveCharge(const G4ParticleDefinition* p,
0076                            const G4Material* material,
0077                      G4double kineticEnergy);
0078
0079   // hide assignment operator
0080   G4ionEffectiveCharge & operator=(const G4ionEffectiveCharge &right) = delete;
0081   G4ionEffectiveCharge(const G4ionEffectiveCharge&) = delete;
0082
0083 private:
0084
0085   G4Pow*                      g4calc;
0086
0087   const G4ParticleDefinition* lastPart = nullptr;
0088   const G4Material*           lastMat = nullptr;
0089
0090   G4double                    inveplus;
0091   G4double                    lastKinEnergy;
0092
0093   G4double                    chargeCorrection;
0094   G4double                    effCharge;
0095
0096   G4double                    energyHighLimit;
0097   G4double                    energyLowLimit;
0098   G4double                    energyBohr;
0099   G4double                    massFactor;
0100   G4double                    minCharge;
0101 };
0102
0103 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0104 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0105
0106 inline G4double G4ionEffectiveCharge::EffectiveChargeSquareRatio(
0107                            const G4ParticleDefinition* p,
0108                            const G4Material* material,
0109                      G4double kineticEnergy)
0110 {
0111   const G4double aCharge =
0112     EffectiveCharge(p,material,kineticEnergy)*chargeCorrection*inveplus;
0113   return aCharge*aCharge;
0114 }
0115
0116 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0117
0118 #endif