C. Fransen1, N. Pietralla1,2, A. P. Tonchev3, M. W. Ahmed3, J. Chen4, G. Feldman3,4, U. Kneissl5, J. Li6, V. N. Litvinenko6,*, B. Perdue3, I. V. Pinayev6, H. H. Pitz5, R. Prior7, K. Sabourov3, M. Spraker7, W. Tornow3, H. R. Weller3, V. Werner1, Y. K. Wu6, and S. W. Yates8
- 1Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany
- 2Department of Physics and Astronomy, State University of New York at Stony Brook, Stony Brook, New York 11794-3800, USA
- 3Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708, USA
- 4Department of Physics, George Washington University, Washington, DC 20052, USA
- 5Institut für Strahlenphysik, Universität Stuttgart, 70569 Stuttgart, Germany
- 6Duke Free Electron Laser Laboratory, Duke University, Durham, North Carolina 27708, USA
- 7North Georgia College & State University, Danlonega, Georgia 30597, USA
- 8Departments of Chemistry and Physics & Astronomy, University of Kentucky, Lexington, Kentucky 40606-0055, USA
- *Present address: Brookhaven National Laboratory, Upton, NY 11973-5000, USA.