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Multiple photodetachment of atomic anions via single and double core-hole creation | | S. Schippers
; A. Perry-Sassmannshausen
; T. Buhr
; M. Martins
; S. Fritzsche
; A Müller
; | | Date: |
7 May 2020 | | Abstract: | We review the recent experimental and theoretical progress in $K$-shell
detachment studies of atomic anions. On the experimental side, this field has
largely benefitted from technical advances at 3rd generation synchrotron
radiation sources. For multiple detachment of C$^-$, O$^-$, and F$^-$ ions,
recent results were obtained at the photon-ion merged-beams setup PIPE which is
a permanent end station at beamline P04 of the PETRA III synchrotron light
source in Hamburg. In addition to a much increased photon flux as compared to
what was available previously, the PIPE setup has an extraordinary detection
sensitivity for heavy charged reaction products that allows one to study
detachment processes with extremely low cross sections in the kilobarn range,
e.g., for processes involving the simultaneous creation of two core-holes by a
single photon. The experimental findings pose new challenges for
state-of-the-art atomic theory and require calculations combining
photoexcitation (ionization) with decay cascade processes that follow after
initial core-hole production. | | Source: | arXiv, 2005.3285 | | Services: | Forum | Review | PDF | Favorites | |
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