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. 2020 Jul 30;11:3824. doi: 10.1038/s41467-020-17599-2

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© The Author(s) 2020

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Fig. 3 — The neutralization cross section is measured as a function of the photon energy. The data points are the experimental measurements with one standard deviation represented by error bars, and the solid line is a fit of Eq. (1). The onset corresponds to the EA of ²¹¹At. The inset shows the region around threshold, where the different onsets in the fit function represent the detachment to the hyperfine levels of the groundstate of the neutral atom.