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GammaLeptoNuclearPhysics.cc
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the newest version in sPHENIX GitHub for file GammaLeptoNuclearPhysics.cc
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// $Id: $
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// //
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// File: GammaLeptoNuclearPhysics.cc //
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// Description: Gamma-nuclear, electro-nuclear and muon-nuclear physics //
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// constructor for EICPhysicsList //
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// //
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// Author: Dennis H. Wright (SLAC) //
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// Date: 20 July 2018 //
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// //
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#include "
GammaLeptoNuclearPhysics.hh
"
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#include <Geant4/G4ProcessManager.hh>
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#include <Geant4/G4PhotoNuclearProcess.hh>
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#include <Geant4/G4ElectronNuclearProcess.hh>
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#include <Geant4/G4PositronNuclearProcess.hh>
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#include <Geant4/G4MuonNuclearProcess.hh>
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#include <Geant4/G4CascadeInterface.hh>
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#include <Geant4/G4ElectroVDNuclearModel.hh>
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#include <Geant4/G4MuonVDNuclearModel.hh>
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#include <Geant4/G4TheoFSGenerator.hh>
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#include <Geant4/G4ExcitedStringDecay.hh>
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#include <Geant4/G4QGSMFragmentation.hh>
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#include <Geant4/G4GeneratorPrecompoundInterface.hh>
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#include <Geant4/G4SystemOfUnits.hh>
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GammaLeptoNuclearPhysics::GammaLeptoNuclearPhysics
():
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qgsp(nullptr),
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stringModel(nullptr),
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stringDecay(nullptr),
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fragModel(nullptr),
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preCompoundModel(nullptr)
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{}
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GammaLeptoNuclearPhysics::~GammaLeptoNuclearPhysics
()
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{
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delete
stringDecay
;
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delete
stringModel
;
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delete
fragModel
;
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delete
preCompoundModel
;
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}
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void
GammaLeptoNuclearPhysics::ConstructProcess
()
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{
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// Use Bertini cascade for low energies
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G4CascadeInterface
* theGammaReaction =
new
G4CascadeInterface
;
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theGammaReaction->
SetMinEnergy
(0.0);
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theGammaReaction->
SetMaxEnergy
(3.5*
GeV
);
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// Use QGSP for high energies
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qgsp
=
new
G4TheoFSGenerator
(
"QGSP"
);
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stringModel
=
new
G4QGSModel<G4GammaParticipants>
;
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stringDecay
=
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new
G4ExcitedStringDecay
(
fragModel
=
new
G4QGSMFragmentation
);
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stringModel
->
SetFragmentationModel
(
stringDecay
);
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preCompoundModel
=
new
G4GeneratorPrecompoundInterface
();
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qgsp
->
SetHighEnergyGenerator
(
stringModel
);
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qgsp
->
SetTransport
(
preCompoundModel
);
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qgsp
->
SetMinEnergy
(3*
GeV
);
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qgsp
->
SetMaxEnergy
(100*
TeV
);
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// Lepto-nuclear models
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G4ElectroVDNuclearModel
* evdn =
new
G4ElectroVDNuclearModel
;
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G4MuonVDNuclearModel
* mvdn =
new
G4MuonVDNuclearModel
;
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G4ProcessManager
* procMan = 0;
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// Gamma
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procMan =
G4Gamma::Gamma
()->
GetProcessManager
();
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G4PhotoNuclearProcess
* pnProc =
new
G4PhotoNuclearProcess
;
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pnProc->
RegisterMe
(theGammaReaction);
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pnProc->
RegisterMe
(
qgsp
);
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procMan->
AddDiscreteProcess
(pnProc);
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// Electron
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procMan =
G4Electron::Electron
()->
GetProcessManager
();
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G4ElectronNuclearProcess
* emn =
new
G4ElectronNuclearProcess
;
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emn->
RegisterMe
(evdn);
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procMan->
AddDiscreteProcess
(emn);
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// Positron
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procMan =
G4Positron::Positron
()->
GetProcessManager
();
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G4PositronNuclearProcess
* epn =
new
G4PositronNuclearProcess
;
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epn->
RegisterMe
(evdn);
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procMan->
AddDiscreteProcess
(epn);
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// Muon-
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procMan =
G4MuonMinus::MuonMinus
()->
GetProcessManager
();
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G4MuonNuclearProcess
* mun =
new
G4MuonNuclearProcess
;
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mun->
RegisterMe
(mvdn);
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procMan->
AddDiscreteProcess
(mun);
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// Muon+
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procMan =
G4MuonPlus::MuonPlus
()->
GetProcessManager
();
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procMan->
AddDiscreteProcess
(mun);
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}
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void
GammaLeptoNuclearPhysics::ConstructParticle
()
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{}
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GammaLeptoNuclearPhysics.cc
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