G4Proton.cc

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// 
// ----------------------------------------------------------------------
//      GEANT 4 class implementation file
//
//      History: first implementation, based on object model of
//      4th April 1996, G.Cosmo
// **********************************************************************
//  New impelemenataion as an utility class  M.Asai, 26 July 2004
// ----------------------------------------------------------------------
 
#include "G4Proton.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
#include "G4ParticleTable.hh"
 
// ######################################################################
// ###                           PROTON                               ###
// ######################################################################
G4Proton* G4Proton::theInstance = 0;
 
G4Proton* G4Proton::Definition()
{
  if (theInstance !=0) return theInstance;
  const G4String name = "proton";
  // search in particle table]
  G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
  G4Ions* anInstance =  reinterpret_cast<G4Ions*>(pTable->FindParticle(name));
  if (anInstance ==0)
  {
  // create particle
  //
  //    Arguments for constructor are as follows
  //               name             mass          width         charge
  //             2*spin           parity  C-conjugation
  //          2*Isospin       2*Isospin3       G-parity
  //               type    lepton number  baryon number   PDG encoding
  //             stable         lifetime    decay table
  //             shortlived      subType    anti_encoding
  // use constants in CLHEP
  //  static const double   proton_mass_c2 = 938.27231 * MeV;
 
   anInstance = new G4Ions(
                 name,  proton_mass_c2,       0.0*MeV,       eplus, 
            1,              +1,             0,          
            1,              +1,             0,             
         "baryon",               0,            +1,        2212,
         true,            -1.0,          NULL,
        false,       "nucleon",         -2212,
         0.0,                0 
             );
 
    // Magnetic Moment
    G4double mN = eplus*hbar_Planck/2./(proton_mass_c2 /c_squared);
    anInstance->SetPDGMagneticMoment( 2.792847351 * mN);
  }
  theInstance = reinterpret_cast<G4Proton*>(anInstance);
  return theInstance;
}
 
G4Proton*  G4Proton::ProtonDefinition()
{
  return Definition();
}
 
G4Proton*  G4Proton::Proton()
{
  return Definition();
}