G4SigmaMinusField Class Reference

#include <G4SigmaMinusField.hh>

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Public Member Functions
	G4SigmaMinusField (G4V3DNucleus *nucleus, G4double coeff=0.36 *CLHEP::fermi)
virtual	~G4SigmaMinusField ()
virtual G4double	GetField (const G4ThreeVector &aPosition)
virtual G4double	GetBarrier ()
virtual G4double	GetCoeff ()
Public Member Functions inherited from G4VNuclearField
	G4VNuclearField (G4V3DNucleus *aNucleus=0)
virtual	~G4VNuclearField ()
void	SetNucleus (G4V3DNucleus *aNucleus)

Additional Inherited Members
Protected Attributes inherited from G4VNuclearField
G4V3DNucleus *	theNucleus
const G4double	radius

Detailed Description

Definition at line 46 of file G4SigmaMinusField.hh.

Constructor & Destructor Documentation

G4SigmaMinusField::G4SigmaMinusField	(	G4V3DNucleus *	nucleus,
		G4double	coeff = 0.36*CLHEP::fermi
	)

Definition at line 49 of file G4SigmaMinusField.cc.

  : G4VNuclearField(nucleus)
{
  theCoeff = coeff;
}

G4SigmaMinusField::~G4SigmaMinusField ( )

virtual

Definition at line 55 of file G4SigmaMinusField.cc.

{ }

Member Function Documentation

G4double G4SigmaMinusField::GetBarrier ( )

virtual

Implements G4VNuclearField.

Definition at line 77 of file G4SigmaMinusField.cc.

{
  G4double A = theNucleus->GetMassNumber();
  G4double Z = theNucleus->GetCharge();
  G4double coulombBarrier = (1.44/1.14) * MeV * Z / (1.0 + G4Pow::GetInstance()->A13(A));
  return -coulombBarrier;
}

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virtual G4double G4SigmaMinusField::GetCoeff ( )

inlinevirtual

Reimplemented from G4VNuclearField.

Definition at line 61 of file G4SigmaMinusField.hh.

{ return theCoeff; }

G4double G4SigmaMinusField::GetField ( const G4ThreeVector &  aPosition )

virtual

Implements G4VNuclearField.

Definition at line 58 of file G4SigmaMinusField.cc.

{
// Field is 0 out of the nucleus!
  if(aPosition.mag() >= radius) return 0.0;

  G4double sigmaMinusMass = G4SigmaMinus::SigmaMinus()->GetPDGMass();

  G4int A = theNucleus->GetMassNumber();
  G4int Z = theNucleus->GetCharge();
  G4double bindingEnergy = G4NucleiProperties::GetBindingEnergy(A, Z);
  G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
  G4double reducedMass = sigmaMinusMass*nucleusMass/(sigmaMinusMass+nucleusMass);

  const G4VNuclearDensity * nuclearDensity=theNucleus->GetNuclearDensity();
  G4double density = nuclearDensity->GetDensity(aPosition);

  return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density+GetBarrier();
}

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The documentation for this class was generated from the following files:

• source/geant4.10.03.p02/source/processes/hadronic/models/binary_cascade/include/G4SigmaMinusField.hh
• source/geant4.10.03.p02/source/processes/hadronic/models/binary_cascade/src/G4SigmaMinusField.cc