Abstract
Recombination of Au49+, Au50+, and Au51+ ions has been studied at the TSR. With Au50+ ions a storage lifetime of only 2 to 4 s was observed with the magnetically expanded electron beam of the cooler at a density of ne = 107 cm-3. This short storage time is a consequence of the highest recombination rate coefficient ever observed with an atomic ion (1.8·10-6 cm3 s-1 at zero relative energy Erel = 0 between electrons and ions). At about 30 meV a huge dielectronic recombination resonance is found with a record small width of only about 15 meV. Such resonances fortuitously occurring near Erel=0 are probably the main reason for the enhanced recombination rates observed with Au50+, with Pb53+ (in a recent experiment at LEAR) as well as with other complex ions. For Au49+ and Au51+ the recombination rates are smaller by an order of magnitude.
Similar content being viewed by others
References
H.F. Beyer, D. Liesen and O. Guzman, Part. Accel. 24 (1989) 163.
C. Carlsund, N. Elander, R. Mowat, D.C. Griffin and M.S. Pindzola, Physica Scripta T 22 (1987) 243.
A. Müller, S. Schennach, M. Wagner, J. Haselbauer, O. Uwira, W. Spies, E. Jennewein, R. Becker, M. Kleinod, U. Pröbstel, N. Angert, J. Klabunde, P.H. Mokler, P. Spädtke and B. Wolf, Physica Scripta, T 37 (1991) 62.
S. Schennach, A. Müller, M. Wagner, J. Haselbauer, O. Uwira, W. Spies, E. Jennewein, R. Becker, M. Kleinod, U. Pröbstel, N. Angert, J. Klabunde, P.H. Mokler, P. Spädtke and B. Wolf, in: Physics of Highly-Charged Ions, eds E. Salzborn, P.H. Mokler and A. Müller, Supplement to Z. Phys. D: Atoms, Molecules and Clusters 21 (1991) 205.
S. Baird, J. Bosser, M. Chanel, J. Duran, R. Giannini, P. Lefèvre, R. Ley, R. Maccaferri, S. Maury, I. Meshkov, D. Möhl, G. Molinari, F. Motsch, H. Mulder, U. Oeftiger, J.C. Perrier, E. Roux, G. Tranquille and F. Varenne, CERN, Geneva, Internal Report PS/AR/Note 95-06 (MD), March 1995.
S. Baird, J. Bosser, C. Carli, M. Chanel, P. Lefèvre, R. Ley, R. Maccaferri, S. Maury, I. Meshkov, D. Möhl, G. Molinari, F. Motsch, H. Mulder, G. Tranquille and F. Varenne, Phys. Lett. B 361 (1995) 184.
S. Baird, J. Bosser, C. Carli, M. Chanel, R. Ley, R. Maccaferri, S. Maury, I. Meshkov, D. Möhl, G. Molinari, E. Syresin, G. Tranquille and F. Varenne, CERN, Geneva, Internal Report PS/AR/Note 96-08 (MD), May 1996.
A. Wolf, this volume.
O. Uwira, PhD Thesis, Giessen 1997, in preparation.
H. Bethe and E. Salpeter, Quantum Mechanics of One-and Two-Electron Systems(Springer, Berlin, 1957).
L.H. Andersen and J. Bolko, Phys. Rev. A 42 (1990) 1184.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Uwira, O., Müller, A., Linkemann, J. et al. Recombination measurements at low energies with Au49+,50+,51+ at the TSR. Hyperfine Interactions 108, 149–154 (1997). https://doi.org/10.1023/A:1012694209176
Issue Date:
DOI: https://doi.org/10.1023/A:1012694209176