Phys. Rev. Lett. 93, 193001 (2004) [4 pages]Photoexcitation of He- Hollow-Ion Resonances: Observation of the 2s2p2 4P StateReceived 26 April 2004; published 4 November 2004 Highly correlated states are studied in He-, a fundamental 3-electron system and prototypical negative ion. The 2s2p2 4P state is observed for the first time. This state is detected in a resonant simultaneous double-Auger decay of unprecedented strength. In addition, the first measurements of photodetachment cross sections, positions, widths, and shapes of triply excited resonances in He- are reported. These measurements provide a sensitive test for several sophisticated ab initio calculations, and indicate differences in the position and shape of some structures. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.193001
DOI:
10.1103/PhysRevLett.93.193001
PACS:
32.80.Hd, 32.80.Gc
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