NIST Databases on Atomic Spectra
Abstract
Several NIST atomic and molecular databases of astronomical interest are accessible at the URL: physics.nist.gov. The Atomic Spectra Database (ASD) offers evaluated data on energy levels, wavelengths, and transition probilities for atoms and atomic ions. Data are given for some 950 spectra and 70,000 energy levels. About 91,000 spectral lines are included, with transition probabilities for about half of these. Additional and improved data resulting from our ongoing critical compilations will be included in successive new versions of ASD. Our other atomic databases include the Ground Levels and Ionization Energies for Neutral Atoms, and bibliographic databases on transition probabilities and line broadening. An upcoming new database will give wavelengths and intensities for the stronger lines of all neutral and singly-ionized atoms, along with energy levels and transition probabilities for the persistent lines. This work is supported by the U.S. National Aeronautics and Space Administration and the U.S. Department of Energy.
- Publication:
-
IAU Joint Discussion
- Pub Date:
- 2000
- Bibcode:
- 2000IAUJD...1E..39M