David M. Hartley, Ph.D.

Research Scientist, Dynamics Technology, Inc.

Formerly with the Solid State Theory Group, University of Maryland Baltimore County

Recent Research Interests

My doctoral work was in the theory of negative ion resonances in molecules on surfaces. Investigations included:

• Tunneling theory of negative ion decay at surfaces, in which the effects of scattering environment upon the lifetime and decay rate of a molecular ion were investigated.

• Lifetime evolution in resonance-assisted desorption of adsorbed molecules. We modeled how the change in bond length of an evolving negative ion effects desorption rates.

• Analogies between electron and photon tunneling.

• Interaction between surface states and decaying negative atomic ions.

• The abstract of my Ph.D. dissertation.

Recent Publications

Here are abstracts of my recent publications in surface physics. Copies of preprints may be obtained by e-mailing Professor Philip Rous: philip@lionheart.umbc.edu
• Electron-driven Dynamics at the Gas/Solid interface: Dissociation, Desorption and Reaction of Adsorbed Molecules.

• Site-Specific Negative Ion Formation in Adsorbed Molecules.

• Tunneling Theory of Negative Ion Decay at Surfaces.

• Lifetime Evolution in Resonance Assisted Desorption of Adsorbed Molecules.

• Interaction of Negative Ions with Surface States (in preparation)

I also have a passing interest in nonlinear dynamics:

• Experimental Verification of Periodic Pulling in a Nonlinear Electronic Oscillator.

• Unijunction Transistor Circuit for Demonstrating Nonlinear Periodic Phenomena (in preparation).