Abstract
XAFS-PEPICO synchronous measurement has been applied to free neutral krypton clusters to study the x-ray absorption and de-excitation processes of clusters. The PEPICO measurements for krypton atom reveal that the highly charged daughter ions of Krz+ (z = 3–11) are generated as a result of the deexcitation process. As the cluster size increases, the Kr+, Kr2+ and Kr3+ daughter ion, which is hardly observed in the atomic spectra, shows remarkable increase. The PIY spectrum of Kr+, which is distinct from those of highly charged ions, is similar to the XAFS spectrum of solid krypton.
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