Table 1. Correspondence of notations in Sears (1997 ▸) and in the present work.

Variable	Sears (1997 ▸)	This work
Crystal thickness	d	d
Depth variable
Rescaled depth variable
Bragg angle	θ
Forward current	I
Backward current
Forward beam polar angle	φ
Backward beam polar angle
Bragg cross section	σ	B
Bragg cross section, reduced, forward beam
Bragg cross section, reduced, backward beam
Loss cross section	μ
Total attenuation cross section
Total attenuation cross section, reduced, forward beam
Total attenuation cross section, reduced, backward beam