D. Dauvergne

RTE measurement with Xe52+ ions channeled in a Si crystal

Abstract KLL resonant transfer and excitation (RTE) of 33–43 MeV/nucleon He-like Xe ions channeled along the 〈110〉 axis of a thin Si crystal has been investigated in measurements of charge state distributions and of the resulting X-ray production. The resonance peaks obtained by the two methods are quite similar. The charge state measurements show that RTE appears, for well channeled ions, to be rather independent of the electron density they sample. Resonance energy, width and intensity are compared with theoretical estimates.

Impact parameter dependent charge exchange studies with channeled heavy ions

We use decelerated (below 20 MeV/u) H-like heavy ions extracted from the GSI-ESR storage ring to study electron capture processes such as Radiative Electron Capture (REC) and Mechanical Electron Capture (MEC) in channeling conditions. With the help of simulations, we show that MEC occurs at relatively large impact parameters into highly excited states. REC studies provide information about the electron gas polarization.

X-rays and inner-shell processes with heavy ions channeled in thin crystals

We present some of the recent developments on heavy-ion channeling experiments, in the framework of X-ray emission and inner-shell processes. We discuss the possibility to characterize the very low electron densities sampled by hyperchanneled ions, and we report on an attempt to observe exotic trielectronic recombination.