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arXiv · 1912.04017

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·S. Schippers
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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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A. Perry-Sassmannshausen, T. Buhr, A. Borovik Jr., M. Martins, S. Reinwardt, S. Ricz, S. O. Stock, F. Trinter, A. Müller, S. Fritzsche, S. Schippers. 2019-12-12. Multiple photodetachment of carbon anions via single and double core-hole creation. https://doi.org/10.1103/physrevlett.124.083203

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