Gabriele Cosmo
109 lines
4.4 KiB
C++
109 lines
4.4 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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// $Id$
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//
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//
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// ----------------------------------------------------------------------
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// GEANT 4 class implementation file
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//
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// History: first implementation, based on object model of
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// 4th April 1996, G.Cosmo
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// H.Kurashige 7 July 1996
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// add neutron life time Oct 17 2000
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// **********************************************************************
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// New impelemenataion as an utility class M.Asai, 26 July 2004
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// ----------------------------------------------------------------------
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#include "G4Neutron.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4ParticleTable.hh"
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#include "G4NeutronBetaDecayChannel.hh"
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#include "G4DecayTable.hh"
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// ######################################################################
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// ### NEUTRON ###
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// ######################################################################
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G4Neutron* G4Neutron::theInstance = 0;
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G4Neutron* G4Neutron::Definition()
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{
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if (theInstance !=0) return theInstance;
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const G4String name = "neutron";
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// search in particle table]
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G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
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G4Ions* anInstance = reinterpret_cast<G4Ions*>(pTable->FindParticle(name));
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if (anInstance ==0)
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{
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// create particle
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//
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// Arguments for constructor are as follows
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// name mass width charge
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// 2*spin parity C-conjugation
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// 2*Isospin 2*Isospin3 G-parity
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// type lepton number baryon number PDG encoding
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// stable lifetime decay table
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// shortlived subType anti_encoding
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// use constants in CLHEP
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// static const double neutron_mass_c2 = 939.56563 * MeV;
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anInstance = new G4Ions(
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name, neutron_mass_c2, 7.467e-28*GeV, 0.0,
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1, +1, 0,
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1, -1, 0,
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"baryon", 0, +1, 2112,
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false, 885.7*second, NULL,
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false, "nucleon", 0,
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0.0
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);
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// Magnetic Moment
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G4double mN = eplus*hbar_Planck/2./(proton_mass_c2 /c_squared);
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anInstance->SetPDGMagneticMoment( -1.9130427 * mN);
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//create Decay Table
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G4DecayTable* table = new G4DecayTable();
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// create a decay channel
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G4VDecayChannel* mode = new G4NeutronBetaDecayChannel("neutron",1.00);
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table->Insert(mode);
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anInstance->SetDecayTable(table);
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}
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theInstance = reinterpret_cast<G4Neutron*>(anInstance);
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return theInstance;
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}
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G4Neutron* G4Neutron::NeutronDefinition()
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{
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return Definition();
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}
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G4Neutron* G4Neutron::Neutron()
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{
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return Definition();
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}
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