Temperature and line emissivity vs. depth in the simulated cloud for AGN models, for an initial density of n_H = 100 cm⁻³, and for ζ_CR = 10⁻¹⁶ s⁻¹, 10⁻¹⁵ s⁻¹,  10⁻¹⁴ s⁻¹,  10⁻¹³ s⁻¹, and 10⁻¹² s⁻¹, and log U = −3.0. The different panels a-f correspond to kinetic temperature and the emissivity of [S III]_18.7μm, [S IV]_10.5μm,[Ar II]_7μm,[Ar III]_{8.9 μm},[Ar V]_7.9μm,[Ne II]_12.8μm,[Ne III]_15.5μm, and [Ne V]_14.3μm, respectively. The shaded area indicates the approximate region in which CR heating becomes dominant. The CR-dominated area is depicted in lilac in the temperature plot and in teal in the emissivity plots.