Multiple Photodetachment of Carbon Anions via Single and Double Core-Hole Creation

Editors' Suggestion

Multiple Photodetachment of Carbon Anions via Single and Double Core-Hole Creation

A. Perry-Sassmannshausen, T. Buhr, A. Borovik, Jr., M. Martins, S. Reinwardt, S. Ricz, S. O. Stock, F. Trinter, A. Müller, S. Fritzsche, and S. Schippers

Phys. Rev. Lett. 124, 083203 – Published 27 February 2020

Abstract

We report on new measurements of $m$ -fold photodetachment ( $m = 2 - 5$ ) of carbon anions via $K$ -shell excitation and ionization. The experiments were carried out employing the photon-ion merged-beams technique at a synchrotron light source. While previous measurements were restricted to double detachment ( $m = 2$ ) and to just the lowest-energy $K$ -shell resonance at about 282 eV, our absolute experimental $m$ -fold detachment cross sections at photon energies of up to 1000 eV exhibit a wealth of new thresholds and resonances. We tentatively identify these features with the aid of detailed atomic-structure calculations. In particular, we find unambiguous evidence for fivefold detachment via double $K$ -hole production.

Received 9 December 2019
Accepted 29 January 2020

DOI:https://doi.org/10.1103/PhysRevLett.124.083203

Physics Subject Headings (PhySH)

Atomic & molecular processes in external fields Photodetachment Single- and few-photon ionization & excitation

Atomic, Molecular & Optical

Authors & Affiliations

A. Perry-Sassmannshausen ¹, T. Buhr ¹, A. Borovik, Jr.¹, M. Martins ², S. Reinwardt², S. Ricz³, S. O. Stock ^4,5, F. Trinter^6,7, A. Müller ⁸, S. Fritzsche ^4,5, and S. Schippers ^1,*

¹I. Physikalisches Institut, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 16, 35392 Gießen, Germany
²Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
³Institute for Nuclear Research of the Hungarian Academy of Sciences, Debrecen, P.O. Box 51, 4001, Hungary
⁴Helmholtz-Institut Jena, Fröbelstieg 3, 07743 Jena, Germany
⁵Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
⁶FS-PETRA-S, Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
⁷Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
⁸Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Gießen, Leihgesterner Weg 217, 35392 Gießen, Germany