The FLYCHK code provides a simple and general modeling capability to generate atomic level populations and charge state distributions for low-Z to mid-Z elements under NLTE(Non-Local Thermodynamic Equilibrium) conditions. The code is currently available at the password-protected NIST website. For more information on details, validity and limitations of the code, please click the FLYCHK information page .
Average charge states <Z> of atoms from Z=1 (Hydrogen) to Z=79 (Gold) are calculated by FLYCHK code and plotted over a wide range of plasma conditions. The calculation is done for the steady-state plasmas with electron temperatures from 0.5 eV to 100 keV and electron densities from 1012 cm-3 to 1024 cm-3. Click the element in the periodic table and a page will apear with the information on <Z>, Charge State Distribution and Total Radiative Power Loss Rates of the element.
To help plasma modeling applications, Rate coefficients of Direct Ionization, Excitation-Autoionization, Radiative Recombination and Dielectronic Recombination at coronal conditions are generated for a wide range of plasma temperatures from 0.5 eV to 100 keV. Also avaialble are the Radiative Loss rates per Charge State, both Line radiation and Recombination radiation. They are available at the same page as Charge state distributions. The details of the methods are found at the FLYCHK Rates information page .