Greg KimmelSenior Research Scientist II, Fundamental and Computational Sciences Directorate, Chemical and Material Sciences Division, Chemical Structure and Dynamics
FCSD Staff Information page for Greg Kimmel
http://emslbios.pnl.gov/id/kimmel_ga Updated: November 28, 2007
Current Activities and Projects
Low-energy electron-stimulated reactions in thin water films. Electron-stimulated luminescence in water films.
Energetic processes at surfaces and interfaces are important in fields such as radiation chemistry, radiation biology, waste processing, and advanced materials synthesis. Low-energy electrons (<100 eV) frequently play a dominant role in these energetic processes because the higher-energy primary particles produce numerous low-energy secondary electrons that are chemically active. In addition, the presence of surfaces or interfaces modifies the reactions and processes compared to what occurs in the bulk. We use resonance-enhanced multi-photon ionization (REMPI) spectroscopy and quadrupole mass spectroscopy to investigate energetic, electron-stimulated reactions at surfaces and interfaces in thin molecular films. This work addresses several important issues, including the need to understand the relative importance of the primary excitation source compared to the secondary electrons it produces, energy transfer at surfaces and interfaces, and new reaction pathways at surfaces.
Postdoctoral fellow, Pacific Northwest National Laboratory, 1992-1995
B.S. Engineering Physics (with distinction), Cornell University, Ithaca, NY 14853,
Ph.D. Applied Physics, Cornell University, Ithaca, NY 14853, May 1992
Thesis topic: Charge exchange processes for atoms and molecules scattering
from metal surfaces.