Charles W. Fehrenbach
Research Assistant Professor
Address:	17 Cardwell Hall
Phone:	(785) 532-3461
E-mail:	macf@phys.ksu.edu
Group Webpage
Ph.D. University of Michigan, 1993
B.S. University of Texas, 1981

Research Area

Atomic Collisions

We are investigating electron-capture dynamics in collisions of highly-charged ions with neutral atoms. In collaboration with Colorado State University, we have focused our efforts on the use of laser-excited targets and state-of-the-art detection techniques to make novel measurements of energy and angular-momentum distributions of the product states following electron transfer collisions. We are currently developing a Magneto-Optical Trap for Rb to be used in conjunction with a Recoil Ion Momentum Spectroscopy detection scheme to extend the precision of measurements of collision processes.

Atomic Spectroscopy

In an ongoing collaboration with Steven R. Lundeen of CSU, we use laser and microwave spectroscopy to measure the fine structure intervals of multi-electron ionic atoms. The structure constants that are determined are used to check the accuracy of multi-electron calculations. The experiments are done on the ECR ion source facility in the Macdonald lab.

Research Support

• Department of Energy

Recent Selected Publications

• D. S. Fisher, S. R. Lundeen, C. W. Fehrenbach and B. D. DePaola, Phys. Rev. A 63, 052712 (2001)
• S. R. Lundeen, et. al., Phys. Rev. A 64, 52714 (2001)
• M. A. Gearba, R. A. Komara, S. R. Lundeen, C. W. Fehrenbach and B. D. DePaola, Phys. Rev. A 71, 013424 (2005)
• M. A. Gearba, et. al. Phys. Rev. A 66, 032705 (2002)
• R. A. Komara, M. A. Gearba, S. R. Lundeen and C. W. Fehrenbach, Phys. Rev. A 67, 062502 (2003)