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A: Fachverband Atomphysik

A 25: Poster Session I

A 25.11: Poster

Dienstag, 6. März 2018, 16:15–18:15, Redoutensaal

Direct two-electron ejection from F⁻ by a single photon — •Alfred Müller¹, Alexander Borovik Jr.¹, Sadia Bari², Ticia Buhr¹, Kristof Holste¹, Michael Martins³, Alexander Perry-Sassmannshausen¹, Ronald Phaneuf⁴, Simon Reinwardt³, Sandor Ricz⁵, Kaja Schubert², and Stefan Schippers¹ — ¹Justus-Liebig-Universität Gießen — ²DESY Hamburg — ³Universität Hamburg — ⁴University of Nevada, Reno, USA — ⁵ATOMKI Debrecen, Hungary

Double and triple detachment of the F⁻(1s² 2s² 2p⁶) negative ion by a single photon have been investigated in the photon energy range 660 to 1000 eV [1]. The experimental data provide unambiguous evidence for the dominant role of direct photo-double-detachment with a subsequent single-Auger process in the reaction channel leading to F²⁺ product ions. Absolute cross sections were determined for the direct removal of a (1s+2p) pair of electrons from F⁻ by the absorption of a single photon.
[1] A. Müller et al., (submitted).