Conference paper

Publication year: 2015

Journal: Journal of Physics: Conference Series

Volume number: 635

DOI Link: https://doi.org/10.1088/1742-6596/635/1/012033

Conference: 29th International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015)

Publisher: IOP Publishing: Conference Series

Abstract: 

Multiple ionization of ions subsequent to absorption of a single photon has been studied employing a photon-ion merged-beam setup at the PETRA III synchrotron radiation facility of DESY in Hamburg. Absolute cross sections for single, double and triple ionization of C⁺ ions were measured with emphasis on specific well defined terms of K-shell excited C⁺. In particular, the terms C⁺ (1s2s²2p^{2 2}D,²P) were excited from the ground level of C⁺. Subsequent autoionization processes resulted in the production of C²⁺, C³⁺ and C⁴⁺ ions. The associated decay mechanisms are single-Auger, double-Auger and triple-Auger decay. The observation of C⁴⁺ products arising from C⁺(1s2s²2p^{2 2}D,²P) unambiguously confirmed the existence of triple-Auger decay, i.e., a process in which 4 electrons interact with one another such that one fills the K-shell vacancy and the others are simultaneously ejected. The experiment yields branching ratios for the Auger decay channels as well as individual decay rates for autoionization and radiative stabilization of the C⁺(1s2s²2p^{2 2}D,²P) terms.

Harvard Citation style: Müller, A., Borovik, A., Buhr, T., Hellhund, J., Holste, K., Kilcoyne, A., et al. (2015) Observation of four-electron Auger processes, Journal of Physics: Conference Series, 635, Article 012033. https://doi.org/10.1088/1742-6596/635/1/012033

APA Citation style: Müller, A., Borovik, A., Buhr, T., Hellhund, J., Holste, K., Kilcoyne, A., Klumpp, S., Martins, M., Ricz, S., Viefhaus, J., & Schippers, S. (2015). Observation of four-electron Auger processes. Journal of Physics: Conference Series. 635, Article 012033. https://doi.org/10.1088/1742-6596/635/1/012033