G4hZiegler1985p Class Reference

#include <G4hZiegler1985p.hh>

Inheritance diagram for G4hZiegler1985p:

Public Member Functions
	G4hZiegler1985p ()
	~G4hZiegler1985p ()
G4bool	HasMaterial (const G4Material *material)
G4double	StoppingPower (const G4Material *material, G4double kineticEnergy)
G4double	ElectronicStoppingPower (G4double z, G4double kineticEnergy) const
Public Member Functions inherited from G4VhElectronicStoppingPower
	G4VhElectronicStoppingPower ()
virtual	~G4VhElectronicStoppingPower ()

Additional Inherited Members
Protected Member Functions inherited from G4VhElectronicStoppingPower
G4double	HeEffChargeSquare (const G4double z, const G4double kineticEnergyHe) const
G4double	GetHeMassAMU () const

Detailed Description

Definition at line 59 of file G4hZiegler1985p.hh.

Constructor & Destructor Documentation

G4hZiegler1985p::G4hZiegler1985p

(

)

Definition at line 168 of file G4hZiegler1985p.cc.

                                :G4VhElectronicStoppingPower(), 
  protonMassAMU(1.007276)
{;}

G4hZiegler1985p::~G4hZiegler1985p

(

)

Definition at line 174 of file G4hZiegler1985p.cc.

{;}

Member Function Documentation

G4double G4hZiegler1985p::ElectronicStoppingPower ( G4double  z, G4double  kineticEnergy  ) const

virtual

Implements G4VhElectronicStoppingPower.

Definition at line 203 of file G4hZiegler1985p.cc.

References python.hepunit::keV.

Referenced by StoppingPower().

{
  G4double ionloss ;
  G4int i = G4int(z) - 1 ;  // index of atom
  if(i < 0)  i = 0 ;
  if(i > 91) i = 91 ;
  
  // The data and the fit from: 
  // J.F.Ziegler, J.P.Biersack, U.Littmark The Stoping and
  // Range of Ions in Solids, Vol.1, Pergamon Press, 1985
  // Proton kinetic energy for parametrisation in Ziegler's units (keV/amu)  
  
  G4double T = kineticEnergy/(keV*protonMassAMU) ; 
  
  
  
  G4double e = T ;
  if ( T < 25.0 ) e = 25.0 ;
  
  // universal approximation  
  G4double slow  = a[i][0] * std::pow(e, a[i][1]) + a[i][2] * std::pow(e, a[i][3])  ;
  G4double shigh = std::log( a[i][6]/e + a[i][7]*e ) * a[i][4] / std::pow(e, a[i][5]) ;
  ionloss = slow*shigh / (slow + shigh) ; 
    
  // low energy region
  if ( T < 25.0 ) {
    
    G4double  sLocal = 0.45 ;
    // light elements
    if(6.5 > z) sLocal = 0.25 ;
    // semiconductors
    if(5 == i || 13 == i || 31 == i) sLocal = 0.375 ;
    
    ionloss *= std::pow(T/25.0, sLocal) ;
  }
  
  if ( ionloss < 0.0) ionloss = 0.0 ;
  
  return ionloss;
}

G4bool G4hZiegler1985p::HasMaterial ( const G4Material *  material )

virtual

Implements G4VhElectronicStoppingPower.

Definition at line 179 of file G4hZiegler1985p.cc.

References G4Material::GetNumberOfElements().

{
  if(1 == (material->GetNumberOfElements())) return true;
  return false ;
}

G4double G4hZiegler1985p::StoppingPower ( const G4Material *  material, G4double  kineticEnergy  )

virtual

Implements G4VhElectronicStoppingPower.

Definition at line 187 of file G4hZiegler1985p.cc.

References ElectronicStoppingPower(), G4Material::GetNumberOfElements(), G4Material::GetZ(), and z.

{
  G4double ionloss = 0.0 ;

  // pure material (normally not the case for this function)
  if(1 == (material->GetNumberOfElements())) {
    G4double z = material->GetZ() ;
    ionloss = ElectronicStoppingPower( z, kineticEnergy ) ;  
  }
  
  return ionloss;
}  

---

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

• G4hZiegler1985p.hh
• G4hZiegler1985p.cc