Abstract
The deceleration capabilities of the ESR have been used for the first time in a dedicated ground state QED experiment conducted at the gasjet target of the ring. By decelerating bare uranium ions from 358 MeV/u down to energies of as low as 49 MeV/u, X-ray spectra have been obtained which provide an abundant yield of characteristic X-ray transitions. The experiment demonstrates that, by choosing the appropriate beam energy and gasjet target, almost all excited projectile states can be selectively populated. Moreover, the experiment provides the first data for beam lifetimes of stored decelerated high-Z ions. Such data are essential for the design of future experiments dealing with decelerated ion beams far below 50 MeV/u.
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Stöhlker, T., Reich, H., Beckert, K. et al. First experiment with decelerated bare uranium ions conducted at the ESR storage ring. Hyperfine Interactions 108, 29–38 (1997). https://doi.org/10.1023/A:1012669503724
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DOI: https://doi.org/10.1023/A:1012669503724