celeritas::GeantPhysicsOptions Struct Reference

Construction options for Geant physics. More...

#include <GeantPhysicsOptions.hh>

Public Types
using	MevEnergy = Quantity< units::Mev, double >

Public Attributes
GeantMuonPhysicsOptions	muon
	Muon EM physics.
bool	verbose {false}
	Print detailed Geant4 output.
GeantOpticalPhysicsOptions	optical
	Optical physics options. More...
Gamma physics
Enable Compton scattering
bool	compton_scattering {true}
	Enable the photoelectric effect.
bool	photoelectric {true}
	Enable the photoelectric effect.
bool	rayleigh_scattering {true}
	Enable Rayleigh scattering.
bool	gamma_conversion {true}
	Enable electron pair production.
bool	gamma_general {false}
	Use G4GammaGeneral instead of individual gamma processes.
Electron and positron physics
Enable discrete Coulomb
bool	coulomb_scattering {false}
	Enable e- and e+ ionization.
bool	ionization {true}
	Enable e- and e+ ionization.
bool	annihilation {true}
	Enable positron annihilation.
BremsModelSelection	brems {BremsModelSelection::all}
	Enable bremsstrahlung and select a model.
MscModelSelection	msc {MscModelSelection::urban}
	Enable multiple coulomb scattering and select a model.
RelaxationSelection	relaxation {RelaxationSelection::none}
	Enable atomic relaxation and select a model.
Physics options
Number of log-spaced bins per factor of 10 in energy
int	em_bins_per_decade {7}
	Enable universal energy fluctuations.
bool	eloss_fluctuation {true}
	Enable universal energy fluctuations.
bool	lpm {true}
	Apply relativistic corrections for select models.
bool	integral_approach {true}
	See PhysicsParamsOptions::disable_integral_xs.
Cutoff options
Lowest energy of any EM physics process
MevEnergy	min_energy {0.1 * 1e-3}
	Highest energy of any EM physics process.
MevEnergy	max_energy {100 * 1e6}
	Highest energy of any EM physics process.
double	linear_loss_limit {0.01}
	See PhysicsParamsOptions::linear_loss_limit.
MevEnergy	lowest_electron_energy {0.001}
	Tracking cutoff kinetic energy for e-/e+.
bool	apply_cuts {false}
	Kill secondaries below the production cut.
double	default_cutoff {0.1 * units::centimeter}
	Set the default production cut for all particle types [len].
Multiple scattering configuration
E-/e+ range factor for MSC models
double	msc_range_factor {0.04}
	Safety factor for MSC models.
double	msc_safety_factor {0.6}
	Safety factor for MSC models.
double	msc_lambda_limit {0.1 * units::centimeter}
	Lambda limit for MSC models [len].
double	msc_theta_limit {constants::pi}
	Polar angle limii between single and multiple Coulomb scattering.
double	angle_limit_factor {1}
	Factor for dynamic computation of angular limit between SS and MSC.
MscStepLimitAlgorithm	msc_step_algorithm {MscStepLimitAlgorithm::safety}
	Step limit algorithm for MSC models.
NuclearFormFactorType	form_factor {NuclearFormFactorType::exponential}
	Nuclear form factor model for Coulomm scattering.

Detailed Description

Construction options for Geant physics.

These options attempt to default to our closest match to G4StandardEmPhysics. They are passed to the detail::CelerEmPhysicsList and detail::CelerFTFPBert physics lists to provide an easy way to set up physics options.

Member Data Documentation

optical

GeantOpticalPhysicsOptions celeritas::GeantPhysicsOptions::optical

Initial value:

{
        GeantOpticalPhysicsOptions::deactivated()}

Optical physics options.

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The documentation for this struct was generated from the following file:

• GeantPhysicsOptions.hh