G4Alpha.cc

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//
// $Id$
//
// 
// ----------------------------------------------------------------------
//      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 "G4Alpha.hh"
#include "G4SystemOfUnits.hh"
#include "G4ParticleTable.hh"
 
// ######################################################################
// ###                           ALPHA                                ###
// ######################################################################
 
G4Alpha* G4Alpha::theInstance = 0;
 
G4Alpha* G4Alpha::Definition()
{
  if (theInstance !=0) return theInstance;
  const G4String name = "alpha";
  // 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
  //             excitation
   anInstance = new G4Ions(
                 name,    3.727379*GeV,       0.0*MeV,  +2.0*eplus,
                    0,              +1,             0,
                    0,               0,             0,
            "nucleus",               0,            +4,  1000020040,
                 true,            -1.0,          NULL,
         false,       "static",   -1000020040, 
                 0.0
               );
 
  }
 
  theInstance = reinterpret_cast<G4Alpha*>(anInstance);
  return theInstance;
}
 
G4Alpha*  G4Alpha::AlphaDefinition()
{
  return Definition();
}
 
G4Alpha*  G4Alpha::Alpha()
{
  return Definition();
}