celeritas::SeltzerBergerModel Class Reference

Manage the Seltzer-Berger model for Bremsstrahlung. More...

#include <SeltzerBergerModel.hh>

Inheritance diagram for celeritas::SeltzerBergerModel:

Public Types
using	Mass = units::MevMass
using	ReadData = std::function< ImportSBTable(AtomicNumber)>
using	HostRef = HostCRef< SeltzerBergerData >
using	DeviceRef = DeviceCRef< SeltzerBergerData >
using	SPConstImported = std::shared_ptr< ImportedProcesses const >
Public Types inherited from celeritas::Model
using	UPConstGridBuilder = std::unique_ptr< ValueGridBuilder const >
	Type aliases.
using	MicroXsBuilders = std::vector< UPConstGridBuilder >
using	SetApplicability = std::set< Applicability >
Public Types inherited from celeritas::ActionTypeTraits< P, S >
using	CoreParams = P
using	CoreStateHost = S< MemSpace::host >
using	CoreStateDevice = S< MemSpace::device >
using	SpanCoreStateHost = Span< S< MemSpace::host > *const >
using	SpanCoreStateDevice = Span< S< MemSpace::device > *const >

Public Member Functions
	SeltzerBergerModel (ActionId id, ParticleParams const &particles, MaterialParams const &materials, SPConstImported data, ReadData load_sb_table)
	Construct from model ID and other necessary data.
SetApplicability	applicability () const final
	Particle types and energy ranges that this model applies to. More...
MicroXsBuilders	micro_xs (Applicability) const final
	Get the microscopic cross sections for the given particle and material.
void	step (CoreParams const &, CoreStateHost &) const final
	Interact with host data.
void	step (CoreParams const &, CoreStateDevice &) const final
	Interact with device data.
HostRef const &	host_ref () const
	Access SB data on the host.
DeviceRef const &	device_ref () const
	Access SB data on the device.
Public Member Functions inherited from celeritas::Model
StepActionOrder	order () const final
	Dependency ordering of the action.
Public Member Functions inherited from celeritas::StepActionInterface< P, S >
virtual void	step (P const &, S< MemSpace::host > &) const =0
	Execute the action with host data.
virtual void	step (P const &, S< MemSpace::device > &) const =0
	Execute the action with device data.
Public Member Functions inherited from celeritas::ActionInterface
virtual	~ActionInterface () noexcept=0
	Default destructor.
Public Member Functions inherited from celeritas::StaticConcreteAction
	StaticConcreteAction (ActionId id, std::string_view label) noexcept(!CELERITAS_DEBUG)
	Construct a concrete action from a label and ID.
	StaticConcreteAction (ActionId id, std::string_view label, std::string_view description) noexcept(!CELERITAS_DEBUG)
	Construct a concrete action from an ID, a unique label, and a description.
	CELER_DELETE_COPY_MOVE (StaticConcreteAction)
ActionId	action_id () const final
	ID of this action for verification.
std::string_view	label () const final
	Short label.
std::string_view	description () const final
	Descriptive label.

Additional Inherited Members
Protected Member Functions inherited from celeritas::ActionInterface
	ActionInterface ()=default
	CELER_DEFAULT_COPY_MOVE (ActionInterface)

Detailed Description

Manage the Seltzer-Berger model for Bremsstrahlung.

The total scaled bremsstrahlung differential cross section for an element Z is defined as

\[ \chi(Z,E,\kappa) = \frac{\beta^2}{Z^2} k \difd{\sigma}{k}, \]

where \( \kappa = k / E \) is the ratio of the emitted photon energy to the incident charged particle energy, \( \beta \) is the ratio of the charged particle velocity to the speed of light, and \( \difd{\sigma}{k} \) is the bremsstrahlung differential cross section.

Seltzer and Berger have tabulated the scaled DCS (in mb) for elements Z = 1

• 100 and for incident charged particle energies from 1 keV to 10 GeV (reported in MeV) in Seltzer S.M. and M.J. Berger (1986), "Bremsstrahlung energy spectra from electrons with kinetic energy 1 keV–10 GeV incident on screened nuclei and orbital electrons of neutral atoms with Z = 1–100", At. Data Nucl. Data Tables 35, 345–418.

Member Function Documentation

applicability()

auto celeritas::SeltzerBergerModel::applicability ( ) const

finalvirtual

Particle types and energy ranges that this model applies to.

Todo:

Set lower energy bound based on (material-dependent) BremsstrahlungProcess lambda table energy grid to avoid invoking the interactor for tracks with energy below the interaction threshold.

Implements celeritas::Model.

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

• SeltzerBergerModel.hh
• SeltzerBergerModel.cc
• SeltzerBergerModel.cu