Equilibrium charge state distributions for relativistic heavy ions

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Abstract

Equilibrium charge-state distributions have been measured for 617.2 MeV/u Au and 758.2 MeV/u Xe projectiles traversing C, Al, and Pb targets. In all cases bare ions dominate the charge-state distributions as expected for such relativistic velocities. For both projectiles used, the Al target produced the largest fraction of bare ions. This result is in agreement with calculations and with measurements for uranium ions given in the literature. These first atomic physics measurements at the new SIS accelerator have been performed during commissioning of the fragment separator (FRS).

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First presented at 11th Int. Conf. on the Applications of Accelerators in Research and Industry, Nov. 5–8, 1990, Denton, TX, USA.

Dedicated to P. Armbruster on the occasion of his 60th birthday.

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