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Perry-Sassmannshausen, A; Buhr, T; Borovik, A; Martins, M; Reinwardt, S; Ricz, S; Stock, S O; Trinter, F; Müller, A; Fritzsche, S; Schippers, S
Physical review letters, 2020-Feb-28, Letnik: 124, Številka: 8Journal Article
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.
