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A: Fachverband Atomphysik
A 22: Interaction with VUV and X-ray light
A 22.11: Poster
Tuesday, March 1, 2016, 16:30–19:00, Empore Lichthof
Stepwise contraction of the nf Rydberg shells in the 3d photoionization of multiply-charged xenon ions — •S. Schippers1, A. Borovik Jr.1, T. Buhr2, J. Hellhund1, K. Holste1, A. L. D. Kilcoyne3, S. Klumpp4, M. Martins4, A. Müller1, S. Ricz5, and S. Fritzsche6,7 — 1Justus-Liebig-Universität Gießen — 2PTB, Braunschweig — 3Lawrence Berkeley National Laboratory, USA — 4Universität Hamburg — 5ATOMKI, Debrecen, Hungary — 6Helmholtz-Institut Jena — 7Friedrich-Schiller-Universität Jena
We report on recent experimental and theoretical results for triple photoionization of Xeq+ (3≤ q ≤ 5) ions [1]. The measurements were carried out using the photon-ion spectrometer PIPE [2] at the Hamburg PETRA III synchrotron light source. The strongest photoionization resonances are associated with the photoexcitation of a 3d electron to an atomic nf subshell (n = 4,5,6, ...) and the subsequent multiple autoionization of the associated hole states. The 3d3/2−1−3d5/2−1 fine structure splitting (∼13 eV) of the 3d hole leads to two distinct Rydberg series of resonances in each spectrum. Progressively more ionization-resonance structures are observed as the primary charge state of the ions is increased. This visualizes the re-ordering of the ε f continuum into a regular series of (bound) Rydberg orbitals as the ionic core becomes more attractive.
S. Schippers et al., J. Phys. B 48 (2015) 144003.
S. Schippers et al., J. Phys. B 47 (2014) 115602.