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Mahamed Ali


Research Interests

I have been interested in the application of the nuclear charge expansion theory to the calculation of atomic energy levels and oscillator strengths by using perturbation theory and the calculation of fine structure splittings and transition probabilities of forbidden transitions in highly ionized atoms using multi-configuration Dirac-Fock method. My recent research efforts are mainly in the area of application of the Binary-Encounter-Bethe model of Kim and Rudd to calculate ionization cross sections of atoms and molecules by electron impact which are needed for technological applications and modeling of plasma processing for fabrication of semiconductor materials.





Publication List





Guest Researcher
Atomic Spectroscopy

Employment History:


  • National Institute of Standards and Technology, Guest Scientist, 1986-present
  • Howard University, Washington DC, Professor of Chemistry, 1973-present
  • Howard University, Washington DC, Associate Professor of Chemistry, 1969-1973
  • Battele Memorial Institute, Columbus, Ohio;
        Vanderbilt University, Nashville, Tennessee;
        Oak Ridge National Laboratory, Physics Division,  Visiting Scientist, 1968-1969
  • University of York, England, Lecturer in Chemistry, 1966-1968
  • Sheffield University, England, Lecturer in Chemistry, 1965-1966
  • Presidency College, Calcutta, Professor, 1963-1965
  • Keele University, England, Research Associate, 1962-1963
  • Uppsala University, Sweden, Research Associate, 1960-1962



  • Oxford University, England, D. Phil. Quantum Chemistry, 1960
  • Calcutta University, India, M. Sc., Physical Chemistry, 1956
  • Presidency College, Calcutta, B. Sc., Chemistry, 1954

Phone: 301-975-5335
Fax: 301-975-8203