Exponentially cut-off power-law spectrum reflected from neutral material.
See Magdziarz & Zdziarski (MNRAS 1995) for details. The output spectrum
is the sum of the cutoff power law and the reflection component. The
reflection component alone can be obtained for scale (see below)
= rel_refl < 0. Then the actual reflection normalization is |scale|. Note
that you need to change then the limits of rel_refl. The range of rel_refl
in that case should exclude zero (as then the direct component appears).
If 
, there is no cutoff in the power law. Version with variable iron
abundance and new opacities of Balucinska & McCammon (1992, and 1994,
private communication). As expected in AGNs, H and He are assumed to be
fully ionized.
