Tauheed Ahmad
Professor
Physics
Aligarh Muslim University
India
Biography
The areas of interest are Atomic, Molecular, Laser and beam-foil Spectroscopy, Lifetime measurements of the excited states, highly charged ions, Ionization Potential of the ions and Laboratory Astrophysics. However, the main focus has been the structure studies of complex atoms/ions using various techniques like conventional spark sources (Triggered Spark and Sliding Spark) with high resolution spectrographs in Extreme Ultraviolet region to visible wavelength region of the spectrum within the uncertainty limit of ± 0.005 A. New identifications of various transitions are made and new energy levels of the ions are established. Also laser produced plasmas as well as high energy accelerator based beam-foil spectroscopy. The theoretical support to the experimental data is obtained by Cowan's computer code involving multi-configuration interaction Hartree-Fock Calculations with relativistic corrections and least squares fitted (LSF) parametric calculations. The results so obtained includes energy level values of the excited configurations of different stages of ionization, wavelengths of the emitted radiation, oscillator strength as well as transition probabilities and lifetime of the excited states. Experimental ionization potential (I.P.) is determined with high accuracy (±0.001 eV).
Research Interest
Atomic and Laser Spectroscopy
Publications
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A. Tauheed , K. Rahimullah and M.S.Z. Chaghtai, " 4p54d2 configurations of Mo VI " Phys. Rev A32, 23 7 (1985)
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Q. Shujauddin, M.S.Z. Chaghtai, A. Mushtaq and A. Tauheed "The spectrum of five times ionized niobium (Nb V I)". Physica Scripta 26, 91 (1982)
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M.S.Z. Chaghtai and Tauheed Ahmad , "The molybdenum spectra Mo I - XLII " A monograph of 80 pages, International Atomic Energy Agency, Vienna, Austria INDC (IND) - 31/GA. April 1982 .
