Shape resonances in K-shell photodetachment of small size-selected clusters: Experiment and theory
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K -shell photodetachment of size-selected B2 - and B3 - cluster anions has been measured and calculated. The experimental absolute photodetachment cross sections exhibit bound resonances below threshold and two shape resonances above the K -shell threshold. Similar results were obtained for all of the cationic products observed, B+ and B2 + from B2 -, as well as B+, B2 +, and B3 + from B3 -. The overall agreement between measured and calculated photodetachment cross sections is very good. However, the theoretical study yielded additional bound resonances not observed in the experimental data. 2007 The American Physical Society.