Phys. Rev. Lett. 95, 083001 (2005) [4 pages]Inner-Shell Photodetachment Thresholds: Unexpected Long-Range Validity of the Wigner LawReceived 20 April 2005; published 15 August 2005 Threshold behavior in inner-shell photodetachment is studied for the first time, specifically with 2-, 3-, or 4-electron emission from He- and S-. The threshold shapes are surprisingly consistent with the Wigner threshold law in all cases, despite large PCI effects observed in He-. In S-, the s-wave law is observed to agree with the data over an unprecedented range, more than an order of magnitude greater than predictions, and allows for the observation of the d-wave component. The measurements also demonstrate a means for obtaining precise core-excitation energies of free atoms. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.083001
DOI:
10.1103/PhysRevLett.95.083001
PACS:
32.80.Gc, 32.80.Hd
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