Overview of Atomic and Molecular Data Unit Activities

The Atomic and Molecular Data Unit operates within the Nuclear Data Section of the International Atomic Energy Agency, Vienna, Austria.The primary objective of the Atomic and Molecular Data Unit is to establish and maintain internationally recommended numerical databases on atomic and molecular collision and radiative processes, atomic and molecular structure characteristics, particle-solid surface interaction processes and physico-chemical and thermo-mechanical material properties for use in fusion energy research and other plasma science and technology applications.

  • Databases on Atomic and Molecular Data for Fusion.
    1. ALADDIN The atomic and molecular, plasma-surface interaction database
    2. AMBDAS The bibliographical database
    3. GENIE for GENeral Internet search Engine allows a multiple search on different databases on the web for spectral and collisional atomic data for fusion and atomic physics research. The new version includes requests for dielectronic recombination data.
    4. OPEN-ADAS is a joint development between the ADAS Project and the IAEA to provide extensive access to fundamental and derived atomic data for fusion from the ADAS project and its related databases. Registration is required but the access is cost free.
    5. Rovibronic energy levels for triplet electronic states of molecular deuterium (December 2007)
      B. P. Lavrov and I. S. Umrikhin, Faculty of Physics, St.-Petersburg State University
      Numerical data and report
    6. Franck-Condon Factors, Transition Probabilities and Radiative Lifetimes for Hydrogen Molecules and their Isotopomeres, U. Fantz, D. Wünderlich (May 2004).
      Numerical data and report (INDC (NDS) 457)

  • Online Computing
    1. Heavy Particles collisions    Cross sections for excitation and charge transfer for collisions between hydrogenic targets and bare ions can be calculated online. Potential users are asked to request a user name and password.
    2. Los Alamos atomic physics codes An interface is available to run several Los Alamos atomic physics codes for calculation of atomic structure, electron impact excitation, as well as ionization processes
    3. Average Approximation is an interface to average approximation cross sections for calculating electron impact cross sections for atomic ions. This is expected to be useful in generating cross sections of reasonable accuracy when more accurate cross section data is not available.
    4. Rate coefficients Results from collisional radiative calculations of plasmas carried out with the Los Alamos modeling codes are available. Interpolations allow the user to obtain total radiated power, average ion charge, and relative ionization populations in a steady state plasma.

    The IAEA Atomic and Molecular Data Unit achieves its objectives by coordinating the activities of the International Atomic and Molecular Data Center Network(DCN), initiation and conducting international Coordinated Research Projects (CRP), organization of various types of Expert's Meetings, and using other forms (research contracts, research agreements, consultancies) for stimulation of the generation, collection and critical assessment of the required atomic, molecular (A+M) and plasma-material interaction (PMI) data information.

    The activity of the IAEA Atomic and Molecular Data Unit is supervised and biennially reviewed by the Subcommittee on Atomic and Molecular Data for Fusion of the International Fusion Research Council (IFRC A+M Subcommittee), an advisory body to the Agency's Director General.