Conference paper

Publication year: 2009

Journal: Journal of Physics: Conference Series

Volume number: 163

DOI Link: https://doi.org/10.1088/1742-6596/163/1/012058

Conference: 14th International Conference on the Physics of Highly Charged Ions (HCI 2008)

Publisher: IOP Publishing: Conference Series

Abstract: 

Low-energy dielectronic recombination resonances of beryllium-like Ge²⁸⁺ have been studied by electron collision spectroscopy in the heavy-ion storage ring TSR using a twin-electron beam technique combined with an ultracold photoelectron source. Rich resonance structure below 1.7 eV is observed which mainly arises from resonant capture of the free electron to 91 Rydberg states accompanied by excitation of inner valence electrons from the 2s²(¹S₀) ground state to 2s2p(¹P₁). The positions of resonances below 0.3 eV are measured with an accuracy better than 0.5 meV. Accurate calculations of Rydberg binding energies for these resonances are still required in order to derive a precise value for the ¹S₀ – ¹P₁ transition energy, which may give the opportunity for high-accuracy testing of QED corrections to atomic energy levels for a two valence electron system.

Harvard Citation style: Orlov, D., Krantz, C., Bernhardt, D., Brandau, C., Hoffmann, J., Müller, A., et al. (2009) High resolution low-energy dielectronic recombination rate coefficients of beryllium-like germanium: QED test bench for two-valence-electron systems, Journal of Physics: Conference Series, 163, Article 012058. https://doi.org/10.1088/1742-6596/163/1/012058

APA Citation style: Orlov, D., Krantz, C., Bernhardt, D., Brandau, C., Hoffmann, J., Müller, A., Ricsóka, T., Schippers, S., Shornikov, A., & Wolf, A. (2009). High resolution low-energy dielectronic recombination rate coefficients of beryllium-like germanium: QED test bench for two-valence-electron systems. Journal of Physics: Conference Series. 163, Article 012058. https://doi.org/10.1088/1742-6596/163/1/012058