celeritas::WentzelHelper Class Reference

Helper class for the Wentzel OK and VI Coulomb scattering model. More...

#include <WentzelHelper.hh>

Public Types
Type aliases
using	Charge = units::ElementaryCharge
using	Energy = units::MevEnergy
using	Mass = units::MevMass
using	MomentumSq = units::MevMomentumSq

Public Member Functions
	WentzelHelper (ParticleTrackView const &particle, MaterialView const &material, AtomicNumber target_z, NativeCRef< WentzelOKVIData > const &wentzel, CoulombIds const &ids, Energy cutoff)
	Construct from particle and material properties.
AtomicNumber	atomic_number () const
	Get the target atomic number.
real_type	screening_coefficient () const
	Get the Moliere screening coefficient.
real_type	mott_factor () const
	Get the Mott factor (maximum, used for rejection)
real_type	kin_factor () const
	Get the multiplicative factor for the cross section.
real_type	cos_thetamax_electron () const
	Get the maximum scattering angle off of electrons.
real_type	cos_thetamax_nuclear () const
	Get the maximum scattering angle off of a nucleus.
real_type	calc_xs_electron (real_type cos_thetamin, real_type cos_thetamax) const
	Calculate the electron cross section for Coulomb scattering.
real_type	calc_xs_nuclear (real_type cos_thetamin, real_type cos_thetamax) const
	Calculate the nuclear cross section for Coulomb scattering.

Detailed Description

Helper class for the Wentzel OK and VI Coulomb scattering model.

This calculates the Moliere screening coefficient, the maximum scattering angle off of electrons, and the ratio of the electron to total Wentzel cross sections.

The Moliere screening parameter is largely from fernandez-msc-1993 Eq.

1. For heavy particles, an empirical correction \( 1 + \exp(-(0.001 Z)^2) \) is used to better match the data in attwood-scatteringmuons-2006 . See also Bethe's re-derivation of Moliere scattering (bethe-msc-1953).

See [g4prm] section 8.5.

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

• WentzelHelper.hh