Population fractions of different charge states of dense carbon plasmas at mass densities of 5 (a), 100 (b), and 235 g cm⁻³ (c), shown for temperatures of 50, 100, 200, and 500 eV. For each plasma density and temperature, solid and dashed lines indicate the results with and without the NIC effect on the partition functions of free electrons, respectively. All other effects, including the IPDs and internal partition functions arising from the plasma environment, are treated identically in both sets of results.