celeritas::inp::GridReflection Struct Reference

Model reflectivity as a user-prescribed function of energy. More...

#include <OpticalPhysics.hh>

Public Member Functions
	operator bool () const

Public Attributes
Grid	reflectivity
	Grid values [MeV -> unitless].
Grid	transmittance
Grid	efficiency
	optional

Detailed Description

Model reflectivity as a user-prescribed function of energy.

As per Geant4 conventions:

• Reflectivity is the probability that a photon undergoes its usual surface interaction.
• Transmittance is the probability that a photon crosses the surface without change.
• Efficiency is the quantum efficiency of a detector at the surface. It is the probability that a photon absorbed will be registered by the detector.

Only reflectivity and transmittance are defined by the user, while the remaining probability is the chance for the photon to be absorbed. If the photon is absorbed and an efficiency grid is defined, then the efficiency probability is used to determine if the photon is detected.

The reflectivity and transmittance grids are sampled together and must sum to between 0 and 1 at every grid point.

The efficiency grid is sampled independently (if provided), and must be in the range [0,1].

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

• OpticalPhysics.hh