Import Geant4 6.0.0 source tree

2016-06-09 10:41:53 +02:00
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+//
+// ********************************************************************
+// * DISCLAIMER                                                       *
+// *                                                                  *
+// * The following disclaimer summarizes all the specific disclaimers *
+// * of contributors to this software. The specific disclaimers,which *
+// * govern, are listed with their locations in:                      *
+// *   http://cern.ch/geant4/license                                  *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.                                                             *
+// *                                                                  *
+// * This  code  implementation is the  intellectual property  of the *
+// * GEANT4 collaboration.                                            *
+// * By copying,  distributing  or modifying the Program (or any work *
+// * based  on  the Program)  you indicate  your  acceptance of  this *
+// * statement, and all its terms.                                    *
+// ********************************************************************
+//
+//
+// -------------------------------------------------------------------
+//      GEANT 4 class implementation file 
+//
+//      CERN, Geneva, Switzerland
+//
+//      File name:     G4PionZeroField.cc
+//
+//      Author:        Alessandro Brunengo (Alessandro.Brunengo@ge.infn.it)
+// 
+//      Creation date: 5 June 2000
+// -------------------------------------------------------------------
+#include "G4PionZeroField.hh"
+#include "G4NucleiPropertiesTable.hh"
+#include "G4VNuclearDensity.hh"
+#include "G4FermiMomentum.hh"
+#include "G4PionZero.hh"
+#include "G4HadTmpUtil.hh"
+
+
+G4PionZeroField::G4PionZeroField(G4V3DNucleus * nucleus, G4double coeff)
+  : G4VNuclearField(nucleus)
+{
+  theCoeff = coeff;
+}
+
+
+G4PionZeroField::~G4PionZeroField()
+{ }
+
+
+const G4PionZeroField & G4PionZeroField::operator=(const G4PionZeroField &)
+{
+  throw G4HadronicException(__FILE__, __LINE__, "G4PionZeroField::operator= meant not to be accessible");
+  return *this;
+}
+
+
+G4int G4PionZeroField::operator==(const G4PionZeroField &) const
+{
+  throw G4HadronicException(__FILE__, __LINE__, "G4PionZeroField::operator== meant not to be accessible");
+  return 0;
+}
+
+
+G4int G4PionZeroField::operator!=(const G4PionZeroField &) const
+{
+  throw G4HadronicException(__FILE__, __LINE__, "G4PionZeroField::operator!= meant not to be accessible");
+  return 1;
+}
+
+
+G4double G4PionZeroField::GetField(const G4ThreeVector & aPosition)
+{
+// Field is 0 out of the nucleus!
+  if(aPosition.mag() >= radius) return 0.0;
+
+  G4double pionZeroMass = G4PionZero::PionZero()->GetPDGMass();
+  G4double A = theNucleus->GetMassNumber();
+  G4double Z = theNucleus->GetCharge();
+
+  G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(G4lrint(Z), G4lrint(A));
+  G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
+  G4double reducedMass = pionZeroMass*nucleusMass/(pionZeroMass+nucleusMass);
+
+
+  G4double density = A*theNucleus->GetNuclearDensity()->GetDensity(aPosition);
+  G4double nucleonMass = (proton_mass_c2+neutron_mass_c2)/2;
+
+  return 2.*pi*hbarc*hbarc/reducedMass*(1+pionZeroMass/nucleonMass)*theCoeff*density;
+}
+
+G4double G4PionZeroField::GetBarrier()
+{
+  return 0;
+}