G4AdjointPositron.cc

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// ------------------------------------------------------------
//      GEANT 4 class header file
//
//      History: 
//    1st March 2007 creation by L. Desorgher based on a modification of G4Positron        
//    06  Nov.  2008 modified for Geant4-09-02  by Hisaya Kurashige 
//
//-------------------------------------------------------------
// 
 
#include "G4AdjointPositron.hh"
#include "G4ParticleTable.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
 
// ######################################################################
// ###                         ADJOINT ELECTRON                       ###
// ######################################################################
G4AdjointPositron* G4AdjointPositron::theInstance = 0;
 
G4AdjointPositron* G4AdjointPositron::Definition()
{ 
  
  if (theInstance !=0) return theInstance;
  const G4String name = "adj_e+";
  // search in particle table]
  G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
  G4ParticleDefinition* anInstance = 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 electron_mass_c2 = 0.51099906 * MeV;
 
  // NOTE  : electric charge and magnetic moment is opposite 
  //         compared with real positron, because adjoint particles
  //         are used to back-trace
   anInstance = new G4ParticleDefinition(
                 name,  electron_mass_c2,       0.0*MeV,    -1.*eplus, 
            1,                 0,             0,          
            0,                 0,             0,             
         "adjoint",               -1,             0,    -10000011,
          true,             -1.0,          NULL,
                 false,           "adj_lepton"
              );
   // Bohr Magnetron
   G4double muB =  -0.5*eplus*hbar_Planck/(electron_mass_c2/c_squared) ;
   anInstance->SetPDGMagneticMoment( muB * 2.* 1.0011596521859 );
 
  }
  theInstance = reinterpret_cast<G4AdjointPositron*>(anInstance);
  return theInstance;
}
 
G4AdjointPositron*  G4AdjointPositron::AdjointPositronDefinition()
{
  return Definition();
}
 
G4AdjointPositron*  G4AdjointPositron::AdjointPositron()
{
  return Definition();
}