Construct G4EmStandardPhysics processes that are implemented in Celeritas. More...

#include <SupportedEmStandardPhysics.hh>

Inheritance diagram for celeritas::SupportedEmStandardPhysics:

Public Types
Type aliases
using	Options = GeantPhysicsOptions

Public Member Functions
	SupportedEmStandardPhysics (Options const &options)
	Construct with physics options.

void	ConstructParticle () override
	Build list of available particles.

void	ConstructProcess () override
	Build list of available processes and models.

Detailed Description

Construct G4EmStandardPhysics processes that are implemented in Celeritas.

This physics list is targeted at HEP experiments and reproduces most of the Geant4 G4EmStandardPhysics.

Limitations:

No support for generic ions
No hadronic EM interactions
Wentzel VI MSC is not supported
No polarized gamma processes

Electron/positron processes:

Processes	Model classes
Pair annihilation	G4eeToTwoGammaModel
Ionization	G4MollerBhabhaModel
Bremsstrahlung (low E)	G4SeltzerBergerModel
Bremsstrahlung (high E)	G4eBremsstrahlungRelModel
Coulomb scattering	G4eCoulombScatteringModel
Multiple scattering (low E)	G4UrbanMscModel
Multiple scattering (high E)	G4WentzelVIModel

Gamma processes:

Processes	Model classes
Compton scattering	G4KleinNishinaCompton
Photoelectric effect	G4LivermorePhotoElectricModel
Rayleigh scattering	G4LivermoreRayleighModel
Gamma conversion	G4PairProductionRelModel

If the gamma_general option is enabled, we create a single unified G4GammaGeneralProcess process, which embeds these other processes and calculates a combined total cross section. It's faster in Geant4 but shouldn't result in statistically different answers.

Muon processes are disabled by default:

Processes	Model classes
Pair production	G4MuPairProductionModel
Ionization (low E, mu-)	G4ICRU73QOModel
Ionization (low E, mu+)	G4BraggModel
Ionization (high E)	G4MuBetheBlochModel
Bremsstrahlung	G4MuBremsstrahlungModel
Coulomb scattering	G4eCoulombScatteringModel
Multiple scattering	G4WentzelVIModel

Warning: For muon-catalyzed fusion physics, the G4MuonMinusAtomicCapture , which is a G4VRestProcess with G4ProcessType::fHadronic , is added for mu- and is the exception to the EM-only rule. It does not require importing any cross section tables, but its inclusion enables muCF physics. This design decision may need revisiting in the future.

Note: Prior to version 11.1.0, Geant4 used the G4BetheBlochModel for muon ionization between 200 keV and 1 GeV and the G4MuBetheBlochModel above 1 GeV. Since version 11.1.0, the G4MuBetheBlochModel is used for all energies above 200 keV.

Member Function Documentation

◆ ConstructParticle()

void celeritas::SupportedEmStandardPhysics::ConstructParticle ( )

override

Build list of available particles.

The minimal E.M. set can be built by using G4EmBuilder::ConstructMinimalEmSet(); and includes gamma, e+, e-, mu+, mu-, pi+, pi-, K+, K-, p, pbar, deuteron, triton, He3, alpha, and generic ion, along with Geant4's pseudo-particles geantino and charged geantino.

This method is called when the physics list is provided to the run manager.

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

Public Types

Public Member Functions

Detailed Description

Member Function Documentation

◆ ConstructParticle()