Konferenzpaper

Jahr der Veröffentlichung: 2009

Zeitschrift: Journal of Physics: Conference Series

Bandnummer: 194

DOI Link: https://doi.org/10.1088/1742-6596/194/1/012023

Konferenz: 26th International Conference on Photonic, Electronic and Atomic Collisions

Verlag: IOP Publishing: Conference Series

Abstract: 

The study of isotope shifts and hyperfine effects in dielectronic recombination (DR) resonance spectra strikes a conceptually new path for investigations of nuclear properties such as charge radius, spin, magnetic moment of nuclei or lifetimes of long-lived excited nuclear states. A series of DR experiments with heavy three-electron ions (Li-like) was performed at the heavy-ion storage ring ESR of the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. In a pilot experiment the two stable isotopes A=142 and A=150 of neodymium ^ANd⁵⁷⁺ were investigated. From the displacement of DR resonances the isotope shifts δE^142,150(2s – 2P_l/2) = 40.2(3)(6) meV and δE^142,150(2s – 2p_3/2) = 42.3(12)(20) meV for 2s – 2P_j transitions of the Li-like ions have been obtained. An evaluation within a full QED framework yielded a change in the mean-square charge radius of ^142,150δ(r²) = −1.36(1)(3) fm². At GSI, in addition to stable isotopes, in-flight synthesized radioisotopes can be studied as well. The production of radioisotopes of interest, the subsequent separation in the storage ring ESR and first DR experiments with the exotic nuclei ²³⁷U⁸⁹⁺ and ²³⁴Pa⁸⁸⁺ (Z=91) are presented. The paper is concluded with a brief outlook at future DR experiments with heavy radioisotopes at the ESR.

Harvard-Zitierstil: Brandau, C., Kozhuharov, C., Müller, A., Bernhardt, D., Böhm, S., Bosch, F., et al. (2009) Isotope shifts in dielectronic recombination: From stable to in-flight-produced nuclei, Journal of Physics: Conference Series, 194, Article 012023. https://doi.org/10.1088/1742-6596/194/1/012023

APA-Zitierstil: Brandau, C., Kozhuharov, C., Müller, A., Bernhardt, D., Böhm, S., Bosch, F., Boutin, D., Currell, F., Dimopoulou, C., Franzke, B., Gumberidze, A., Harman, Z., Jentschura, U., Keitel, C., Kluge, H., Kozhedub, Y., Krücken, R., Litvinov, Y., Nolden, F., ...Wolf, A. (2009). Isotope shifts in dielectronic recombination: From stable to in-flight-produced nuclei. Journal of Physics: Conference Series. 194, Article 012023. https://doi.org/10.1088/1742-6596/194/1/012023