• Click on an element to display available properties. A list of properties will appear on the left. Click on the property of interest to see data.
  • Click on "About the project" for details on available data and computational methods.
  • Use "Feedback" button to send us your comments/ suggestions.
  • Close

    Portal for High-Precision Atomic Data and Computation

    Version 2.0
    Last Update to Data Content: March 2022, Release Date: March 2022, Version History

    This portal provides energies, transition matrix elements, transition rates, radiative lifetimes, branching ratios, polarizabilities, and hyperfine constants for atoms and ions. The data are calculated using a high-precision state-of-the-art linearized coupled-cluster method. All values include estimated uncertainties. Data for more systems will be added in the future. Experimental values are included with references where high-precision data are available. Future updates will also include releases of user-friendly atomic codes. We seek community input to improve the portal and guide the next stages of the project. Learn more

    Supported by the National Science Foundation