Abstract
In two separate experiments at the ESR recombination of 230 MeV/u Bi80+ and 170 MeV/u U89+ ions was studied. The analysis of these experiments has been carried on in order to extract information about radiative recombination (RR) of very highly charged ions exposed to electrons with a density of few 106 cm-3. In the light of the recombination rate enhancement seen in almost all recent experiments at a relative energy Erel = 0 eV, a surprising result is found for the very highly charged ions, which could add some confusion to an already puzzling picture: in spite of the high charge state of the investigated ions there is no evidence of enhanced recombination beyond the expected RR rate. This observation appears to be supported by other experimental findings at the ESR as well. We suspect, however, that this is a consequence of excessive transverse magnetic field components in the ESR cooler (which have meanwhile been corrected for) causing variable degrees of angular mismatch between the ion beam and the electron beam occurring when the ring settings are tuned for optimum cooling.
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References
A. Müller, Comments At. Mol. Phys. 32 (1996) 143.
H.A. Kramers, Philos. Mag. 42 (1923) 836.
M. Stobbe, Ann. Physik 7 (1930) 661.
P. Kienle, M. Kleber, B. Povh, R.M. Diamond, F.S. Stephens, E. Grosse, M.R. Maier and D. Proetel, Phys. Rev. Lett. 31 (1973) 1099.
C.R. Vane, S. Datz, P.F. Dittner, J. Giese, N.L. Jones, H.F. Krause, T.M. Roessel and P.S. Peterson, Phys. Rev. A 49 (1994) 1847.
T. Stöhlker, C. Kozhuharov, P.H. Mokler, A. Warczak, F. Bosch, H. Geissel, R. Moshammer, C. Scheidenberger, J. Eichler, A. Ichihara, T. Shirai, Z. Stachura and P. Rymuza, Phys. Rev. A 51 (1995) 2098.
R.E. Marrs, S.R. Elliott and D.A. Knapp, Phys. Rev. Lett. 72 (1994) 4082.
A. Wolf, J. Berger, M. Bock, D. Habs, B. Hochadel, G. Kilgus, G. Neureither, U. Schramm, D. Schwalm, E. Szmola, A. Müller, M. Wagner and R. Schuch, 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) 69.
L.H. Andersen, J. Bolko and P. Kvistgaard, Phys. Rev. Lett. 64 (1990) 729.
L.H. Andersen and J. Bolko, Phys. Rev. A 42 (1990) 1184.
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.
A. Wolf, Habilitationsschrift, Heidelberg (1992), unpublished.
A. Frank, A. Müller, J. Haselbauer, S. Schennach, W. Spies, O. Uwira, M. Wagner, R. Becker, E. Jennewein, M. Kleinod, N. Angert and P.H. Mokler, in: Physics of Highly-Charged Ions, eds P. Richard, M. Stöckli, C.L. Cocke and C.D. Lin, AIP Conference Proceedings 274 (American Institute of Physics, New York, 1993) p. 532.
S. Schennach, A. Müller, O. Uwira, J. Haselbauer, W. Spies, A. Frank, M. Wagner, R. Becker, M. Kleinod, E. Jennewein, N. Angert, P.H. Mokler, N.R. Badnell and M.S. Pindzola, Z. Phys. D: Atoms, Molecules and Clusters 30 (1994) 291.
O. Uwira, A. Müller, W. Spies, A. Frank, J. Linkemann, L. Empacher, P.H. Mokler, R. Becker, M. Kleinod and S. Ricz, Nucl. Instr. Methods B 98 (1995) 162.
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.
H. Gao, D.R. DeWitt, R. Schuch, W. Zong, S. Asp and M. Pajek, Phys. Rev. Lett. 75 (1995) 4381.
U. Schramm, T. Schüssler, D. Habs, D. Schwalm and A. Wolf, Hyp. Int. 99 (1996) 309.
H. Gao, S. Asp, C. Biedermann, D.R. DeWitt, R. Schuch, W. Zong and H. Danared, Hyp. Int. 99 (1996) 301.
O. Uwira, A. Müller, W. Spies, J. Linkemann, A. Frank, T. Cramer, L. Empacher, R. Becker, M. Kleinod, P.H. Mokler, J. Kenntner, A. Wolf, U. Schramm, T. Schüssler, D. Schwalm and D. Habs, Hyp. Int. 99 (1996) 295.
A. Müller and A. Wolf, Hyp. Int. (1996), to be published.
O. Uwira, A. Müller, J. Linkemann, T. Bartsch, C. Brandau, M. Schmitt, A. Wolf, D. Schwalm, R. Schuch, W. Zong, H. Lebius, W.G. Graham, J. Doerfert and D.W. Savin, this volume.
O. Uwira, A. Müller, W. Spies, A. Frank, J. Linkemann, C. Brandau, T. Cramer, C. Kozhuharov, J. Klabunde, N. Angert, P.H. Mokler, R. Becker, M. Kleinod and N.R. Badnell, this volume.
M. Steck, S. Baumann, K. Beckert, H. Eickhoff, B. Franzke, F. Nolden, U. Schaaf, H. Schulte and P. Spädtke, in: Scientific Report 1990, GSI 91-1, Gesellschaft für Schwerionenforschung mbH, Darmstadt (1992) p. 398.
F. Bosch, M. Jung, O. Klepper, W. Koenig, C. Kozhuharov, R. Moshammer, B. Franzke and the ESR-Group, in: Scientific Report 1991, GSI 92-1, Gesellschaft f ür Schwerionenforschung mbH, Darmstadt (1992) p. 178.
M. Bell and J.S. Bell, Part. Accel. 12 (1982) 49.
A. Müller and A. Wolf, in: Accelerator-Based Atomic Physics Techniques and Applications, eds S. Shafroth and J. Austin (American Institute of Physics, 1996), in print.
W. Spies, A. Müller, J. Linkemann, A. Frank, M. Wagner, C. Kozhuharov, B. Franzke, K. Beckert, F. Bosch, H. Eickhoff, M. Jung, O. Klepper, W. König, P.H. Mokler, R. Moshammer, F. Nolden, U. Schaaf, P. Spädtke, M. Steck, P. Zimmerer, N. Grün, W. Scheid, M.S. Pindzola and N.R. Badnell, Phys. Rev. Lett. 69 (1992) 2768.
W. Spies, O. Uwira, A. Müller, J. Linkemann, L. Empacher, A. Frank, C. Kozhuharov, P. H. Mokler, F. Bosch, O. Klepper, B. Franzke and M. Steck, Nucl. Instr. Methods B 98 (1995) 158.
W. Spies, Dissertation, Giessen (1995); available from the Library of the Gesellschaft für Schwerionenforschung mbH, Darmstadt.
H. Bethe and E. Salpeter, Quantum Mechanics of One-and Two-Electron Systems, Vol. 35 of the Handbuch der Physik (Springer, Berlin, 1957).
O. Uwira, W. Spies, C. Kozhuharov, A. Müller, J. Linkemann, B. Franzke, K. Beckert, F. Bosch, H. Eickhoff, M. Jung, O. Klepper, P.H. Mokler, R. Moshammer, F. Nolden, U. Schaaf, P. Spädtke and M. Steck, 18th International Conference on the Physics of Electronic and Atomic Collisions, Aarhus, Abstracts of Contributes Papers, p. 377.
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Spies, W., Müller, A., Uwira, O. et al. Recombination of lithium-like bismuth and uranium ions with free electrons at the ESR. Hyperfine Interactions 108, 155–165 (1997). https://doi.org/10.1023/A:1012646326014
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DOI: https://doi.org/10.1023/A:1012646326014