// -------------------------------------------------------------------------
// -----                       FairIon header file                      -----
// -----          Created 27/08/04  by V. Friese / D.Bertini           -----
// -------------------------------------------------------------------------

/** FairIon.h
 *@author V.Friese <v.friese@gsi.de>
 *@author D.Bertini <d.bertini@gsi.de>
 **
 ** A class for the user definition of an ion. It will be instantiated
 ** from the constructor of the FairIonGenerator.
 **/


#ifndef FAIRION_H
#define FAIRION_H

#include "TNamed.h"
class FairLogger;
class FairIon: public TNamed
{
  public:

    /** Default constructor **/
    FairIon();


    /** Standard constructor
     *@param name  name
     *@param z     atomic number
     *@param a     atomic mass
     *@param q     electric charge
     *@param e     excitation energy
     *@param m     mass [GeV]
     ** If mass is not given, it will be set to a times the proton mass.
     **/

    FairIon(const char* name, Int_t z, Int_t a, Int_t q, Double_t e=0., Double_t m=0.);
    void SetParams( const char* name, Int_t z, Int_t a,
                    Int_t q, Double_t e=0., Double_t m=0.) {
      SetName(name);
      fZ=z;
      fA=a;
      fQ=q;
      fExcEnergy=e;
      fMass=m;
    }
    /** Destructor **/
    virtual ~FairIon();


    /** Accessors **/
    /**
    * Return the atomic number
    */
    Int_t GetZ()            const { return fZ; }
    /**
     * Return the atomic mass
    */
    Int_t GetA()            const { return fA; }
    /**
     * Return the charge
    */
    Int_t GetQ()            const { return fQ; }
    /**
    * Return the  excitation energy
    */
    Double_t GetExcEnergy() const { return fExcEnergy; }
    /**
    * Return the mass in GeV
    */
    Double_t GetMass()      const { return fMass; }

    /** Modifiers **/
    /**
    * Set the  excitation energy
    */
    void SetExcEnergy(Double_t eExc) { fExcEnergy = eExc; }
    /**
    * Set the mass in GeV
    */
    void SetMass(Double_t mass)      { fMass = mass*amu; }


  private:

    /** Data members **/

    static Int_t fgNIon;  //! /// Number of ions instantiated. One per generator.
    Int_t    fZ;          /// Atomic number
    Int_t    fA;          /// Atomic mass
    Int_t    fQ;          /// Electric charge
    Double_t fExcEnergy;  /// Excitation energy [GeV]
    Double_t fMass;       /// Mass [GeV]
    FairLogger* fLogger;  //! /// FairLogger
    static const Double_t amu; ///  .931494028 Gev/c**2


    ClassDef(FairIon,2);

};



#endif