Gabriele Cosmo
228 lines
9.0 KiB
C++
228 lines
9.0 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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// ClassName: G4Element
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//
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// Description: Contains element properties
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//
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// Class description:
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//
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// An element is a chemical element either directly defined in terms of
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// its characteristics: its name, symbol,
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// Z (effective atomic number)
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// N (effective number of nucleons)
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// A (effective mass of a mole)
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// or in terms of a collection of constituent isotopes with specified
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// relative abundance (i.e. fraction of nb of atoms per volume).
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//
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// Quantities, with physical meaning or not, which are constant in a given
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// element are computed and stored here as Derived data members.
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//
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// The class contains as a private static member the table of defined
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// elements (an ordered vector of elements).
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//
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// Elements can be assembled singly or in mixtures into materials used
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// in volume definitions via the G4Material class.
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//
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// It is strongly recommended do not delete G4Element instance in the
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// user code. All G4Elements will be automatically deleted at the end
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// of Geant4 session
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// 09-07-96, new data members added by L.Urban
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// 17-01-97, aesthetic rearrangement, M.Maire
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// 20-01-97, Tsai formula for the rad length, M.Maire
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// 21-01-97, remove mixture flag, M.Maire
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// 24-01-97, new data member: fTaul
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// new method: ComputeIonisationPara, M.Maire
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// 20-03-97, corrected initialization of pointers, M.Maire
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// 27-06-97, new function GetIsotope(int), M.Maire
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// 24-02-98, fWeightVector becomes fRelativeAbundanceVector
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// 27-04-98, atomic shell stuff, V. Grichine
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// 09-07-98, Ionisation parameters removed from the class, M.Maire
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// 04-08-98, new method GetElement(elementName), M.Maire
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// 16-11-98, Subshell -> Shell, mma
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// 30-03-01, suppression of the warning message in GetElement
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// 17-07-01, migration to STL, M. Verderi
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// 13-09-01, stl migration. Suppression of the data member fIndexInTable
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// 14-09-01, fCountUse: nb of materials which use this element
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// 26-02-02, fIndexInTable renewed
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// 01-04-05, new data member fIndexZ to count the number of elements with same Z
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// 17-10-06: Add Get/Set fNaturalAbundance (V.Ivanchenko)
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// 17.09.09, add fNbOfShellElectrons and methods (V. Grichine)
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#ifndef G4ELEMENT_HH
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#define G4ELEMENT_HH 1
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#include "G4ElementTable.hh"
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#include "G4ElementVector.hh"
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#include "G4IonisParamElm.hh"
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#include "G4Isotope.hh"
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#include "G4IsotopeVector.hh"
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#include "G4ios.hh"
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#include "globals.hh"
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#include <vector>
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class G4Element
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{
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public: // with description
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// Constructor to Build an element directly; no reference to isotopes
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G4Element(const G4String& name, // its name
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const G4String& symbol, // its symbol
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G4double Zeff, // atomic number
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G4double Aeff); // mass of mole
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// Constructor to Build an element from isotopes via AddIsotope
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G4Element(const G4String& name, // its name
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const G4String& symbol, // its symbol
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G4int nbIsotopes); // nb of isotopes
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virtual ~G4Element();
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G4Element(G4Element&) = delete;
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const G4Element& operator=(const G4Element&) = delete;
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// Add an isotope to the element
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void AddIsotope(G4Isotope* isotope, // isotope
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G4double RelativeAbundance); // fraction of nb of
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// atomes per volume
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// Retrieval methods
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inline const G4String& GetName() const { return fName; }
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inline const G4String& GetSymbol() const { return fSymbol; }
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// Atomic number
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inline G4double GetZ() const { return fZeff; }
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inline G4int GetZasInt() const { return fZ; }
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// Atomic weight in atomic units
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inline G4double GetN() const { return fNeff; }
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inline G4double GetAtomicMassAmu() const { return fNeff; }
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// Mass of a mole in Geant4 units for atoms with atomic shell
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inline G4double GetA() const { return fAeff; }
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inline G4bool GetNaturalAbundanceFlag() const;
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inline void SetNaturalAbundanceFlag(G4bool);
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// the number of atomic shells in this element:
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inline G4int GetNbOfAtomicShells() const { return fNbOfAtomicShells; }
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// the binding energy of the shell, ground shell index=0
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G4double GetAtomicShell(G4int index) const;
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// the number of electrons at the shell, ground shell index=0
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G4int GetNbOfShellElectrons(G4int index) const;
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// number of isotopes constituing this element:
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inline std::size_t GetNumberOfIsotopes() const { return fNumberOfIsotopes; }
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// vector of pointers to isotopes constituing this element:
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inline G4IsotopeVector* GetIsotopeVector() const { return theIsotopeVector; }
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// vector of relative abundance of each isotope:
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inline G4double* GetRelativeAbundanceVector() const { return fRelativeAbundanceVector; }
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inline const G4Isotope* GetIsotope(G4int iso) const { return (*theIsotopeVector)[iso]; }
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// the (static) Table of Elements:
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static const G4ElementTable* GetElementTable();
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static std::size_t GetNumberOfElements();
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// the index of this element in the Table:
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inline std::size_t GetIndex() const { return fIndexInTable; }
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// return pointer to an element, given its name:
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static G4Element* GetElement(const G4String& name, G4bool warning = true);
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// Coulomb correction factor:
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inline G4double GetfCoulomb() const { return fCoulomb; }
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// Tsai formula for the radiation length:
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inline G4double GetfRadTsai() const { return fRadTsai; }
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// pointer to ionisation parameters:
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inline G4IonisParamElm* GetIonisation() const { return fIonisation; }
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// printing methods
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friend std::ostream& operator<<(std::ostream&, const G4Element*);
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friend std::ostream& operator<<(std::ostream&, const G4Element&);
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friend std::ostream& operator<<(std::ostream&, const G4ElementTable&);
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friend std::ostream& operator<<(std::ostream&, const G4ElementVector&);
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inline void SetName(const G4String& name) { fName = name; }
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G4bool operator==(const G4Element&) const = delete;
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G4bool operator!=(const G4Element&) const = delete;
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private:
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void InitializePointers();
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void ComputeDerivedQuantities();
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void ComputeCoulombFactor();
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void ComputeLradTsaiFactor();
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void AddNaturalIsotopes();
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// Mutable access to the element table.
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static G4ElementTable& GetElementTableRef();
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// Basic data members (which define an Element)
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G4String fName; // name
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G4String fSymbol; // symbol
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G4double fZeff; // Effective atomic number
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G4double fNeff; // Effective number of nucleons
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G4double fAeff; // Effective mass of a mole
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G4int fZ;
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G4int fNbOfAtomicShells; // number of atomic shells
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G4double* fAtomicShells; // Pointer to atomic shell binding energies
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G4int* fNbOfShellElectrons; // Pointer to the number of subshell electrons
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G4int fNumberOfIsotopes; // Number of isotopes added to the element
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G4IsotopeVector* theIsotopeVector; // vector of constituent isotopes of the element
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G4double* fRelativeAbundanceVector; // Fraction nb of atomes per volume
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// for each constituent
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// Set up the static Table of Elements
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std::size_t fIndexInTable;
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G4bool fNaturalAbundance;
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// Derived data members (computed from the basic data members)
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G4double fCoulomb; // Coulomb correction factor
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G4double fRadTsai; // Tsai formula for the radiation length
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G4IonisParamElm* fIonisation; // Pointer to ionisation parameters
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};
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inline G4bool G4Element::GetNaturalAbundanceFlag() const { return fNaturalAbundance; }
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inline void G4Element::SetNaturalAbundanceFlag(G4bool val) { fNaturalAbundance = val; }
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#endif
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