Observation of the rate enhancement in K-shell radiative recombination of bare uranium ions with cooling electrons ∗

D. Banaś1, M. Pajek1, Th. Stohlker2,3, A. Surzhykov2,3, H. F. Beyer2, S. Bohm4, F. Bosch2, C. Brandau2, M. Czarnota1, S. Chatterjee2, J.-Cl. Dousse5, S. Fritzsche2, A. Gumberidze2, S. Hagmann2, C. Kozhuharov2, D. Liesen2, P. H. Mokler2, A. Muller4, A. Kumar2, R. Reuschl2, E. W. Schmidt4, D. Sierpowski6, U. Spillmann2, J. Szlachetko1,5, S. Tashenov2, S. Trotsenko2, P. Verma2, and A. Warczak6 1Institute of Physics, Jan Kochanowski University, 25-406 Kielce, Poland; 2Gesellschaft fur Schwerionenforschung, D-64291 Darmstadt, Germany; 3Physikalisches Institut der Universitat Heidelberg, D-69117 Heidelberg, Germany; 4Institut fur Kernphysik, Justus-Liebig Universitat, D-35390 Giessen, Germany; 5Department of Physics, University of Fribourg, CH-1700 Fribourg, Switzerland; 6Institute of Physics, Jagiellonian University, 30-059 Cracow, Poland