Top row: Spectra of radiation emerging from a partially ionized slab observed at 75° relative to the slab normal for n_H = 10¹⁷ (dash-dotted), 10¹⁹ (solid), and 10²¹ cm⁻³ (dotted), and for T = 0.3 (cyan) and 1.0 keV (orange). The slab is in either CIE (left column) or PIE (right column). Middle and bottom rows: PD of the emerging radiation for slabs with a seed blackbody temperature of 0.3 keV (middle row) or 1 keV (bottom row).