I am working in the group of Professor D. W. Lindle in the Department of Chemistry of the University of Nevada, Las Vegas (UNLV) since April 1994. My field of research is X-ray Atomic and Molecular Spectroscopy (XAMS) and the experiments are performed at the Advanced Light Source (ALS) at the Lawrence Berkeley National Laboratory (LBNL) in Berkeley, California.
My special interests are angular resolved electron spectrometry, with emphasis on non-dipolar electron angular distributions. The investigated targets are gas phase samples of atoms (the rare gases He, Ne, Ar, Kr, and Xe) as well as molecules (CO, N2, CO2, and other). Linear polarized synchrotron radiation from the ALS is used to ionize single atoms or molecules which emit electrons into various directions with different intensities and velocities. We measure all these properties and learn about the dynamics of interactions between light and matter.
Sometimes an atom (or molecule) emits 2 or more electrons at the same time which can be detected in coincidence by using up to four analyzers positioned at different angles. Each electron carries some information of the initial ionization process. It is therefore necessary to detect all at once to get a complete picture of the interaction dynamics.
Molecules tend to fragment into charged (ions) or neutral (atoms) pieces. We are able to detect the ions (directions and intensities) to learn about the fragmentation dynamics during and after the interation of light with matter. By detecting electrons and ions in coincidence one receives even more information about the dynamics of interaction.
| List of Publications |
| Recreation in Las Vegas |
| Recreation around Las Vegas |
| Research History and CV |
Send comments to hemmers@unlv.edu.
