Gabriele Cosmo
119 lines
4.7 KiB
C++
119 lines
4.7 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// ----------------------------------------------------------------------------
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//
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// GEANT4 Class header file
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//
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// File name: G4GSPWACorrections
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//
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// Author: Mihaly Novak
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//
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// Creation date: 17.10.2017
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//
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// Modifications:
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//
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// Class description: class to describe and store correction factors to the
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// integrated quantities of G4GoudsmitSaundersonMscModel (screening parameter,
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// first and second moments) derived by using accurate Dirac-PWA based
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// integrated quantities.
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//
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// References:
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// M. Novak: https://arxiv.org/abs/2410.13361
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//
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// ----------------------------------------------------------------------------
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#ifndef G4GSPWACorrections_h
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#define G4GSPWACorrections_h 1
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#include <CLHEP/Units/SystemOfUnits.h>
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#include "globals.hh"
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#include <vector>
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#include <string>
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#include <sstream>
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class G4Material;
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class G4Element;
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class G4GSPWACorrections {
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public:
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G4GSPWACorrections(G4bool iselectron=true);
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~G4GSPWACorrections();
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void Initialise();
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void GetPWACorrectionFactors(G4double logekin, G4double beta2, G4int matindx,
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G4double &corToScr, G4double &corToQ1, G4double &corToG2PerG1);
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private:
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void InitDataPerElement();
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void InitDataPerMaterials();
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void LoadDataElement(const G4Element*);
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void InitDataMaterial(const G4Material*);
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void ClearDataPerElement();
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void ClearDataPerMaterial();
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// either per material or per Z
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struct DataPerMaterial {
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std::vector<G4double> fCorScreening; // correction factor to Moliere screening parameter
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std::vector<G4double> fCorFirstMoment; // correction factor to first moment
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std::vector<G4double> fCorSecondMoment; // correction factor to second
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};
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// data members
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private:
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G4bool fIsElectron;
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static constexpr G4int gMaxZet = 98; // max. Z for which correction data were computed (98)
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static constexpr G4int gNumEkin = 31; // number of kinetic energy grid points for Mott correction
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static constexpr G4int gNumBeta2 = 16; // \beta^2 values between [fMinBeta2-fMaxBeta2]
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static constexpr G4double gMinEkin = 1.*CLHEP::keV; // minimum kinetic energy value
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static constexpr G4double gMidEkin = 100.*CLHEP::keV; // kinetic energy at the border of the E_{kin}-\beta^2 grids
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static constexpr G4double gMaxBeta2 = 0.9999; // maximum \beta^2 value
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//
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G4double fMaxEkin; // from max fMaxBeta2 = 0.9999 (~50.5889 [MeV])
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G4double fLogMinEkin; // \ln[fMinEkin]
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G4double fInvLogDelEkin; // 1/[\ln(fMidEkin/fMinEkin)/(fNumEkin-fNumBeta2)]
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G4double fMinBeta2; // <= E_{kin}=100 [keV] (~0.300546)
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G4double fInvDelBeta2; // 1/[(fMaxBeta2-fMinBeta2)/(fNumBeta2-1)]
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//
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static const std::string gElemSymbols[];
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//
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std::vector<DataPerMaterial*> fDataPerElement; // size will be gMaxZet+1; won't be null only at used Z indices
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std::vector<DataPerMaterial*> fDataPerMaterial; // size will #materials; won't be null only at used mat. indices
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};
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#endif
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