 D_{cp}: charge deposition by primary electrons
 The charge of primary electrons given to the unit depth of the absorber per
incident electron.
 D_{e}: energy deposition (total)
 The energy given to the unit depth of the absorber per incident electron.
 D_{eb}: energy deposition via bremsstrahlung
 The energy given to the unit depth of the absorber by photo secondaries via
bremsstrahlung (radiative) process per incident electron.
 D_{ec}: energy deposition via collision
 The energy given to the unit depth of the absorber by collision process per
incident electron.
 h_{E}: energyreflection ratio of electrons
 The ratio of the total energy of electrons reflected from the effectively
semiinfinite absorber to the total energy of incident electrons.
Also called energybackscattering coefficient.
 h_{pE}: energyreflection ratio of photons
 The ratio of the total energy of photons reflected from the surface of the
effectively semiinfinite absorber to the total incident energy of electrons.
 h_{N}: numberreflection ratio of electrons
 The ratio of the number of electrons reflected from the effectively
semiinfinite absorber to the number of incident electrons.
In the "Transmission and reflection" mode, the ratios for the slab absorbers
are also treated.
Also called (number) backscattering coefficient.
 k: numbertransmission ratio of electrons
 The ratio of the number of electrons transmitted by an absorber.
Also called (number) transmission coefficient.
 r_{0}: continuous slowingdown approximation range
 The average pathlength traveled by an electron until it comes to a stop,
evaluated by integrating the reciprocal of the stopping power.
 R_{av}: average reach
 The average of the maximum depths on the trajectories of electrons.
Proposed by the name of the average depth of electron penetration in Ref. 8.
Note the difference from z_{av}.
 R_{ex}: extrapolated range
 The absorber thickness at which the tangent at the steepest point on the
almost straight descending portion of the transmission curve (the curve of
numbertransmission ratio vs thickness) meets the thickness axis.
A similar definition can also be made by the use of the integral charge
deposition distribution in the semiinfinite absorber.
 z_{av}: average penetration depth
 The average of the endpoint depths of electrons. Also called projected
range. Note the difference from R_{av}.
