Inner-shell photodetachment thresholds: unexpected long-range validity of the Wigner law
R C Bilodeau1, J D Bozek, N D Gibson
1Western Michigan University, Physics Department, Kalamazoo, Michigan 49008-5151, USA.
Abstract:
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.
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