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G4eBremParametrizedModel.hh
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//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// -------------------------------------------------------------------
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//
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// GEANT4 Class header file
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//
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//
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// File name: G4eBremParametrizedModel
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// extention of standard G4eBremsstrahlungModel
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//
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// Author: Andreas Schaelicke
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//
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// Creation date: 28.03.2008
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//
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// Modifications:
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//
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//
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// Class Description:
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//
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// Implementation of energy loss for gamma emission by electrons and
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// positrons including an improved version of the LPM effect
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// -------------------------------------------------------------------
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//
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#ifndef G4eBremParametrizedModel_h
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#define G4eBremParametrizedModel_h 1
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#include "
G4VEmModel.hh
"
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#include "
G4NistManager.hh
"
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class
G4ParticleChangeForLoss
;
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class
G4PhysicsVector
;
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class
G4eBremParametrizedModel
:
public
G4VEmModel
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{
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public
:
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explicit
G4eBremParametrizedModel
(
const
G4ParticleDefinition
*
p
=
nullptr
,
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const
G4String
& nam =
"eBremParam"
);
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virtual
~G4eBremParametrizedModel
();
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virtual
void
Initialise
(
const
G4ParticleDefinition
*,
const
G4DataVector
&)
override
;
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virtual
void
InitialiseLocal
(
const
G4ParticleDefinition
*,
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G4VEmModel
* masterModel)
override
;
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virtual
G4double
MinEnergyCut
(
const
G4ParticleDefinition
*,
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const
G4MaterialCutsCouple
*)
override
;
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virtual
G4double
ComputeDEDXPerVolume
(
const
G4Material
*,
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const
G4ParticleDefinition
*,
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G4double
kineticEnergy,
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G4double
cutEnergy)
override
;
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virtual
G4double
ComputeCrossSectionPerAtom
(
const
G4ParticleDefinition
*,
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G4double
tkin,
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G4double
Z
,
G4double
,
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G4double
cutEnergy,
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G4double
maxEnergy =
DBL_MAX
)
override
;
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virtual
void
SampleSecondaries
(std::vector<G4DynamicParticle*>*,
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const
G4MaterialCutsCouple
*,
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const
G4DynamicParticle
*,
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G4double
cutEnergy,
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G4double
maxEnergy)
override
;
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virtual
void
SetupForMaterial
(
const
G4ParticleDefinition
*,
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const
G4Material
*,
G4double
)
override
;
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private
:
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void
InitialiseConstants
();
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G4double
ComputeBremLoss
(
G4double
cutEnergy);
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G4double
ComputeXSectionPerAtom
(
G4double
cutEnergy);
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G4double
ComputeDXSectionPerAtom
(
G4double
gammaEnergy);
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G4double
ComputeParametrizedDXSectionPerAtom
(
G4double
kineticEnergy,
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G4double
gammaEnergy,
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G4double
Z);
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void
SetParticle
(
const
G4ParticleDefinition
*
p
);
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G4double
ScreenFunction1
(
G4double
ScreenVariable);
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G4double
ScreenFunction2
(
G4double
ScreenVariable);
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// * fast inline functions *
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inline
void
SetCurrentElement
(
const
G4double
);
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// hide assignment operator
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G4eBremParametrizedModel
&
operator=
(
const
G4eBremParametrizedModel
&
right
) =
delete
;
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G4eBremParametrizedModel
(
const
G4eBremParametrizedModel
&) =
delete
;
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protected
:
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G4NistManager
*
nist
;
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const
G4ParticleDefinition
*
particle
;
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G4ParticleDefinition
*
theGamma
;
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G4ParticleChangeForLoss
*
fParticleChange
;
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static
const
G4double
xgi
[8],
wgi
[8];
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G4double
minThreshold
;
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// cash
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G4double
particleMass
;
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G4double
kinEnergy
;
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G4double
totalEnergy
;
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G4double
currentZ
;
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G4double
z13
,
z23
,
lnZ
;
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G4double
densityFactor
;
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G4double
densityCorr
;
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G4double
Fel
,
Finel
;
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G4double
facFel
,
facFinel
;
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G4double
fMax
,
fCoulomb
;
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G4bool
isElectron
;
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private
:
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// consts
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G4double
lowKinEnergy
;
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G4double
fMigdalConstant
;
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G4double
bremFactor
;
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G4bool
isInitialised
;
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline
void
G4eBremParametrizedModel::SetCurrentElement
(
const
G4double
Z
)
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{
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//std::cout<<"SetCurrentElement Z="<<Z<<std::endl;
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if
(Z !=
currentZ
) {
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currentZ
=
Z
;
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G4int
iz =
G4int
(Z);
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z13
=
nist
->
GetZ13
(iz);
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z23
=
z13
*
z13
;
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lnZ
=
nist
->
GetLOGZ
(iz);
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Fel
=
facFel
-
lnZ
/3. ;
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Finel
=
facFinel
- 2.*
lnZ
/3. ;
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fCoulomb
=
GetCurrentElement
()->
GetfCoulomb
();
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fMax
=
Fel
-
fCoulomb
+
Finel
/
currentZ
+ (1.+1./
currentZ
)/12.;
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#endif
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geant4-10.6-release
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include
G4eBremParametrizedModel.hh
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:34
using
1.8.2 with
ECCE GitHub integration