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Home >> Dr. Solomon Bililign >> Research

Spectroscopy of Transition State Dynamics (1988-1991)
The laser excitation of a reaction complex formed by colliding reactants (e.g. Na + H2) provides unique insight into the potential energy surfaces for chemical reaction in the region of the transition state between the reactant and product valleys. The probe laser is used for state selective detection of reactants. The theory of spectral line shapes is used to interpret the results.

State-to- State Photochemistry (1988-1991)
Nascent rotational and vibrational quantum state distribution of laser induced reactive collisions is determined using laser pump-probe technique.

Laser Spectroscopy and Photodynamics (1991-1993)
Excitation of atomic or molecular fluorescence using one or more tunable lasers is of particular interesting studies of atomic interactions and potential energy curves, obtained from spectroscopic data including accurate dissociation energies, long range interactions, spin changing energy transfer collisions (predissociation phenomena) in metal rare gas systems. Semi-classical theory is used to determine the predissociation life times.

Electronic Structure Calculations (1991-1993)
The main interest is to perform high level ab initio calculations of ground, excited valence and Rydberg states of metal-rare-gas potential energy curves to compare with a wealth of spectroscopic information already available and being accumulated. There is also an interest in ab initio calculations of metal-hydrogen potential energy surfaces to understand the experiments in part 1,2 and 3. and to develop simple analytical model potential functions to describe the metal-rare-gas van der Waals bonding in different electronic states of Al, Mg, Zn, Cd and Hg.

Photodetachment of H-  (summer 1995)
With vacuum UV laser to study state-to-state detachment of negative H- with high photon flux VUV laser beam (100-200nm), and resolve the detached electron energies and determine the final states of the neutralized H atom and match spectral features. Participated in running the lasers. (Los Alamos National Laboratory)

Study of the Photochemistry of Metal CVD (Photochemical Laser Deposition) precursors in cluster environment: Oak Ridge National Laboratory, (Summer 1996, 1997)
The study involves using pico-second lasers in combination with mass spectrometry to ionize and characterize novel clusters of organometallic compounds and to investigate subsequent metal-ion chemistry with a variety of simple molecules.

This website was prepared by North Carolina Agricultural & Technical State University under award number NA06OAR4810187 from the National Oceanic and Atmospheric Administration, U.S. Department of Commerce.  The statements, findings, conclusions, and recommendations are those of the author and do not necessarily reflect the views of the National Oceanic and Atmospheric Administration or the U.S. Department of Commerce.