G4GEMCoulombBarrier Class Reference

#include <G4GEMCoulombBarrier.hh>

Inheritance diagram for G4GEMCoulombBarrier:

Public Member Functions
	G4GEMCoulombBarrier (G4int anA, G4int aZ)
virtual	~G4GEMCoulombBarrier ()
G4double	GetCoulombBarrier (G4int ARes, G4int ZRes, G4double U) const
virtual G4double	BarrierPenetrationFactor (G4double) const
G4double	CalcCompoundRadius (G4int ARes) const

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Detailed Description

Definition at line 37 of file G4GEMCoulombBarrier.hh.

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Constructor & Destructor Documentation

G4GEMCoulombBarrier::G4GEMCoulombBarrier	(	G4int	anA,
		G4int	aZ
	)

Definition at line 36 of file G4GEMCoulombBarrier.cc.

References G4GEMCoulombBarrier().

Referenced by G4GEMCoulombBarrier().

                                                            :
  G4VCoulombBarrier(anA,aZ) 
{}

G4GEMCoulombBarrier::~G4GEMCoulombBarrier

(

)

[virtual]

Definition at line 40 of file G4GEMCoulombBarrier.cc.

{}

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Member Function Documentation

virtual G4double G4GEMCoulombBarrier::BarrierPenetrationFactor

(

G4double

)

const [inline, virtual]

Reimplemented in G4AlphaGEMCoulombBarrier, and G4DeuteronGEMCoulombBarrier.

Definition at line 56 of file G4GEMCoulombBarrier.hh.

  {return 1.0;};

G4double G4GEMCoulombBarrier::CalcCompoundRadius

(

G4int

ARes

)

const

Definition at line 71 of file G4GEMCoulombBarrier.cc.

References G4VCoulombBarrier::GetA(), G4Pow::GetInstance(), and G4Pow::Z13().

{      
  G4Pow* g4pow = G4Pow::GetInstance();
  G4double AresOneThird = g4pow->Z13(ARes);
  G4int A = GetA();
  G4double AejectOneThird = g4pow->Z13(A);

  G4double Result = 0.0;
  if(A == 1){
    Result = 1.7* AresOneThird;

  } else if (A <= 4){
    Result = 1.7* AresOneThird + 1.2;

  } else {
    Result = 1.12*(AresOneThird + AejectOneThird) - 
      0.86*(AresOneThird+AejectOneThird)/(AresOneThird*AejectOneThird)+3.75;
  }
  return Result*fermi;
}

G4double G4GEMCoulombBarrier::GetCoulombBarrier	(	G4int	ARes,
		G4int	ZRes,
		G4double	U
	)			const [virtual]

Implements G4VCoulombBarrier.

Definition at line 43 of file G4GEMCoulombBarrier.cc.

References G4cout, and G4endl.

{
  G4double Barrier = 0.0;
  if (ZRes > ARes || ARes < 1) {
    G4cout << "G4GEMCoulombBarrier::GetCoulombBarrier: "
           << "Wrong values for "
           << "residual nucleus A = " << ARes << " "
           << "and residual nucleus Z = " << ZRes << G4endl;
    throw G4HadronicException(__FILE__, __LINE__,"FATAL error");
  }
  if (GetZ() == 0) {
    Barrier = 0.0;   // If there is no charge there is neither barrier

  } else {
    G4double CompoundRadius = CalcCompoundRadius(ARes);
    Barrier = ( elm_coupling * GetZ() * ZRes)/CompoundRadius;
      
    // Barrier penetration coeficient
    if(GetA() <= 4) { Barrier *= BarrierPenetrationFactor(G4double(ZRes)); }
  
    //JMQ 200709 effective decrease  of barrier with E* (Barashenkov)
    // (not inclued in original Furihata's formulation)
    Barrier /= (1.0 + std::sqrt(U/(static_cast<G4double>(2*ARes))));
  }
  return Barrier;
}

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

• G4GEMCoulombBarrier.hh
• G4GEMCoulombBarrier.cc

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