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Import Geant4 10.5.0.beta source tree

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This commit is contained in:
Gabriele Cosmo
2018-06-29 10:58:11 +02:00
parent fe81a77428
commit 6aa23be517
1581 changed files with 124288 additions and 83758 deletions
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source/processes/electromagnetic/standard/include/G4BetheHeitlerModel.hh
+80 -37
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@@ -23,7 +23,7 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// $Id: G4BetheHeitlerModel.hh 106628 2017-10-17 06:25:38Z gcosmo $
// $Id: G4BetheHeitlerModel.hh 110527 2018-05-29 06:09:58Z gcosmo $
//
// -------------------------------------------------------------------
//
@@ -38,6 +38,8 @@
//
// Modifications:
// 02-02-06 Remove InitialiseCrossSectionPerAtom();
// 28-05-18 New version with improved screening function approximation, improved
// efficiency, documentation and cleanup (M. Novak)
//
// Class Description:
//
@@ -54,6 +56,8 @@
#include "G4PhysicsTable.hh"
#include "G4Log.hh"
#include <vector>
class G4ParticleChangeForGamma;
class G4Pow;
@@ -63,70 +67,109 @@ class G4BetheHeitlerModel : public G4VEmModel
public:
explicit G4BetheHeitlerModel(const G4ParticleDefinition* p = 0,
const G4String& nam = "BetheHeitler");
const G4String& nam = "BetheHeitler");
virtual ~G4BetheHeitlerModel();
virtual void Initialise(const G4ParticleDefinition*,
const G4DataVector&) override;
const G4DataVector&) override;
virtual void InitialiseLocal(const G4ParticleDefinition*,
G4VEmModel* masterModel) override;
G4VEmModel* masterModel) override;
virtual G4double ComputeCrossSectionPerAtom(
const G4ParticleDefinition*,
G4double kinEnergy,
G4double Z,
G4double A=0.,
G4double cut=0.,
G4double emax=DBL_MAX) override;
virtual G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
G4double kinEnergy,
G4double Z,
G4double A=0.,
G4double cut=0.,
G4double emax=DBL_MAX) override;
virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
const G4MaterialCutsCouple*,
const G4DynamicParticle*,
G4double tmin,
G4double maxEnergy) override;
const G4MaterialCutsCouple*,
const G4DynamicParticle*,
G4double tmin,
G4double maxEnergy) override;
protected:
inline G4double ScreenFunction1(const G4double delta);
inline G4double ScreenFunction2(const G4double delta);
inline void ScreenFunction12(const G4double delta, G4double &f1, G4double &f2);
void InitialiseElementData();
struct ElementData {
G4double fDeltaMaxLow;
G4double fDeltaMaxHigh;
};
private:
G4double ScreenFunction1(G4double ScreenVariable);
G4double ScreenFunction2(G4double ScreenVariable);
// hide assignment operator
G4BetheHeitlerModel & operator=(const G4BetheHeitlerModel &right) = delete;
G4BetheHeitlerModel(const G4BetheHeitlerModel&) = delete;
protected:
static const G4int gMaxZet;
G4Pow* fG4Calc;
G4ParticleDefinition* fTheGamma;
G4ParticleDefinition* fTheElectron;
G4ParticleDefinition* fThePositron;
G4ParticleChangeForGamma* fParticleChange;
G4Pow* g4calc;
G4ParticleDefinition* theGamma;
G4ParticleDefinition* theElectron;
G4ParticleDefinition* thePositron;
G4ParticleChangeForGamma* fParticleChange;
static std::vector<ElementData*> gElementData;
};
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
inline G4double G4BetheHeitlerModel::ScreenFunction1(G4double ScreenVariable)
//
// Bethe screening functions for the elastic (coherent) scattering:
// Bethe's phi1, phi2 coherent screening functions were computed numerically
// by using (the universal) atomic form factors computed based on the Thomas-
// Fermi model of the atom (using numerical solution of the Thomas-Fermi
// screening function instead of Moliere's analytical approximation). The
// numerical results can be well approximated (better than Butcher & Messel
// especially near the delta=1 limit) by:
// ## if delta <= 1.4
// phi1(delta) = 20.806 - delta*(3.190 - 0.5710*delta)
// phi2(delta) = 20.234 - delta*(2.126 - 0.0903*delta)
// ## if delta > 1.4
// phi1(delta) = phi2(delta) = 21.0190 - 4.145*ln(delta + 0.958)
// with delta = 136mc^2kZ^{-1/3}/[E(Eg-E)] = 136Z^{-1/3}eps0/[eps(1-eps)] where
// Eg is the initial photon energy, E is the total energy transferred to one of
// the e-/e+ pair, eps0 = mc^2/Eg and eps = E/Eg.
// compute the value of the screening function 3*PHI1 - PHI2
// Compute the value of the screening function 3*PHI1(delta) - PHI2(delta):
inline G4double G4BetheHeitlerModel::ScreenFunction1(const G4double delta)
{
return (ScreenVariable > 1.)
? 42.24 - 8.368*G4Log(ScreenVariable+0.952)
: 42.392 - ScreenVariable*(7.796 - 1.961*ScreenVariable);
return (delta > 1.4) ? 42.038 - 8.29*G4Log(delta + 0.958)
: 42.184 - delta*(7.444 - 1.623*delta);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
inline G4double G4BetheHeitlerModel::ScreenFunction2(G4double ScreenVariable)
// compute the value of the screening function 1.5*PHI1 - 0.5*PHI2
// Compute the value of the screening function 1.5*PHI1(delta) +0.5*PHI2(delta):
inline G4double G4BetheHeitlerModel::ScreenFunction2(const G4double delta)
{
return (ScreenVariable > 1.)
? 42.24 - 8.368*G4Log(ScreenVariable+0.952)
: 41.405 - ScreenVariable*(5.828 - 0.8945*ScreenVariable);
return (delta > 1.4) ? 42.038 - 8.29*G4Log(delta + 0.958)
: 41.326 - delta*(5.848 - 0.902*delta);
}
// Same as ScreenFunction1 and ScreenFunction2 but computes them at once
inline void G4BetheHeitlerModel::ScreenFunction12(const G4double delta,
G4double &f1, G4double &f2)
{
if (delta > 1.4) {
f1 = 42.038 - 8.29*G4Log(delta + 0.958);
f2 = f1;
} else {
f1 = 42.184 - delta*(7.444 - 1.623*delta);
f2 = 41.326 - delta*(5.848 - 0.902*delta);
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
#endif