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G4ePairProduction.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4ePairProduction.cc
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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 file
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//
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//
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// File name: G4ePairProduction
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 17.03.2016
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//
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// Modifications:
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//
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// -------------------------------------------------------------------
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#include "
G4ePairProduction.hh
"
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#include "
G4SystemOfUnits.hh
"
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#include "
G4Electron.hh
"
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#include "
G4Positron.hh
"
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#include "
G4VEmModel.hh
"
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#include "
G4VEmFluctuationModel.hh
"
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#include "
G4MuPairProductionModel.hh
"
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#include "
G4ElementData.hh
"
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#include "
G4EmParameters.hh
"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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using namespace
std;
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G4ePairProduction::G4ePairProduction
(
const
G4String
&
name
)
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:
G4VEnergyLossProcess
(name),
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theParticle(nullptr),
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lowestKinEnergy(100.*
MeV
),
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isInitialised(
false
)
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{
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SetProcessSubType
(
fPairProdByCharged
);
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SetSecondaryParticle
(
G4Positron::Positron
());
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SetIonisation
(
false
);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4bool
G4ePairProduction::IsApplicable
(
const
G4ParticleDefinition
&
p
)
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{
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return
(
G4Electron::Electron
() == &p ||
G4Positron::Positron
() == &p);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double
G4ePairProduction::MinPrimaryEnergy
(
const
G4ParticleDefinition
*,
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const
G4Material
*,
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G4double
)
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{
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return
lowestKinEnergy
;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void
G4ePairProduction::InitialiseEnergyLossProcess
(
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const
G4ParticleDefinition
*
part
,
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const
G4ParticleDefinition
*)
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{
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if
(!
isInitialised
) {
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isInitialised
=
true
;
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theParticle
=
part
;
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G4MuPairProductionModel
* mod =
new
G4MuPairProductionModel
(part,
"ePairProd"
);
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SetEmModel
(mod);
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lowestKinEnergy
=
std::max
(
lowestKinEnergy
, part->
GetPDGMass
()*8.0);
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mod->
SetLowestKineticEnergy
(
lowestKinEnergy
);
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G4VEmFluctuationModel
*
fm
=
nullptr
;
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G4EmParameters
* param =
G4EmParameters::Instance
();
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mod->
SetLowEnergyLimit
(param->
MinKinEnergy
());
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mod->
SetHighEnergyLimit
(param->
MaxKinEnergy
());
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AddEmModel
(1, mod, fm);
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void
G4ePairProduction::StreamProcessInfo
(std::ostream& out)
const
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{
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G4ElementData
* ed =
EmModel
(0)->
GetElementData
();
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if
(ed) {
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for
(
G4int
Z
=1;
Z
<93; ++
Z
) {
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G4Physics2DVector
* pv = ed->
GetElement2DData
(
Z
);
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if
(pv) {
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out <<
" Sampling table "
<< pv->
GetLengthY
()
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<<
"x"
<< pv->
GetLengthX
() <<
"; from "
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<<
G4Exp
(pv->
GetY
(0))/
GeV
<<
" GeV to "
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<<
G4Exp
(pv->
GetY
(pv->
GetLengthY
()-1))/
TeV
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<<
" TeV "
<<
G4endl
;
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break
;
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}
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}
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void
G4ePairProduction::ProcessDescription
(std::ostream& out)
const
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{
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out <<
" Pair production"
;
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G4VEnergyLossProcess::ProcessDescription
(out);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
geant4
tree
geant4-10.6-release
source
processes
electromagnetic
muons
src
G4ePairProduction.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:33
using
1.8.2 with
ECCE GitHub integration