Erlangen 2018 – scientific programme

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A: Fachverband Atomphysik

A 39: Precision Spectroscopy VI - neutrals and ions (joint session A/Q)

A 39.3: Talk

Thursday, March 8, 2018, 14:45–15:00, K 1.016

Analytical methods for the extraction of an ionization potential from dense atomic spectra — •Pascal Naubereit, Reinhard Heinke, Dominik Studer, Marcel Trümper, and Klaus Wendt — Institut für Physik, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany

Complex atomic structures can exhibit intrinsic quantum chaotical behavior. Correspondingly, this prevents a clear identification and assignment of energy levels. However, for the determination of the ionization potential applying e.g. resonance ionization spectroscopy, the convergence of Rydberg series is the most precise direct measurement method. If the possibility to directly allocate and identify a series of Rydberg levels amongst hundreds of other resonances is not available, one may rely on more comprehensive analytical investigation methods for these atomic spectra. In this presentation, several approaches to extract a value for an unknown ionization potential from highly dense atomic spectra are compared. In addition, the applicability of the methods to atomic systems of increasing complexity, namely sodium, holmium, promethium and protactinium, is examined.