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. 2020 Feb 28;124(8):083203.
doi: 10.1103/PhysRevLett.124.083203.

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

A Perry-Sassmannshausen  1 , T Buhr  1 , A Borovik  1 , M Martins  2 , S Reinwardt  2 , S Ricz  3 , S O Stock  4   5 , F Trinter  6   7 , A Müller  8 , S Fritzsche  4   5 , S Schippers  1
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Multiple Photodetachment of Carbon Anions via Single and Double Core-Hole Creation

A Perry-Sassmannshausen et al. Phys Rev Lett. .

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.

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