William J. MeathWilliam J. Meath
Professor Emeritus
B.Sc., Carleton
Ph.D., Wisconsin
Room M0201, Chemistry Building
(519) 661-2111 ext. 86334


Theoretical Chemistry. Laser-molecule interactions. Molecular properties and their additivity. Intermolecular forces and their applications


    Distinguished Research Professor
    Festschrift: Special issue of the Journal of Molecular Structure (Theochem.) 591 (2002)
    UWO Pleva Teaching Award
    USC Teaching Honour Roll

Current Research Programs:

Current interests involve studying the dynamical behaviour of the molecular states, and the absorption spectra, associated with the interaction of one or several lasers with molecules. Of particular interest is the study of the effects of molecular structure, the polarizations, intensities, frequencies, phases, and the durations and shapes of  laser pulses, the time-delay between laser pulses, the life times of excited molecular states, and intermolecular forces, on single- and multi-photon transitions.

Reliable results for a variety of isotropic and anisotropic molecular properties, including dipole oscillator strength distributions, polarizabilities, dispersion interaction energies, and interaction parameters characterizing the penetration of matter by charged particles,  have been and are being evaluated using constrained oscillator strength techniques. The results are being used to develop additivity schemes for these molecular properties.

Both ab initio quantum mechanical and oscillator strength input data are being used to construct reliable complete intermolecular potential energy surfaces for use in the calculation of both the microscopic properties of dimers and the macroscopic properties of collections of atoms or molecules.

Selected Publications:

W.J. Meath and B.N. Jagatap, “On the effects of permanent molecular dipoles in the simultaneous absorption of two photons: Full generalized rotating wave approximation versus analytical results”, J. Chem. Phys. 139, 144104/1 – 144104/12 (2013). [link]

W.J. Meath and B.N. Jagatap, “On the effects of permanent dipole moments in two-photon molecular excitations: an analytic generalized rotating wave approximation treatment including both the direct permanent dipole and virtual state excitation mechanisms”, J. Phys. B: At. Mol. Opt. Phys. 44, 205401/1- 205401/13 (2011).

A.K. Dham, F.R.W. McCourt and W.J. Meath, “An exchange – Coulomb model potential energy surface for the Ne-CO interaction. I. Calculation of Ne-CO van der Waals spectra”, J. Chem. Phys.130, 244310/1 – 244310/16 (2009).

A.K. Dham, G.C. McBane, F.R.W. McCourt and W.J. Meath, “An exchange – Coulomb model potential energy surface for the Ne-CO interaction. II. Molecular beam scattering and bulk gas phenomena in Ne-CO mixtures”, J. Chem. Phys.132, 024308/1 – 024308/18 (2010).

W.J. Meath, “Enhancement of the simultaneous absorption of two photons for pulsed laser - molecule interactions”, J. Opt. Soc. Am. B 25, 865 – 876 (2008).

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