Phys. Rev. Lett. 89, 093002 (2002) [4 pages]Oscillations in the Double-Photoionization Cross Section of Li near ThresholdReceived 25 February 2002; published 9 August 2002 The threshold region of the double-photoionization cross section of lithium was investigated using monochromatized synchrotron radiation and ion time-of-flight spectrometry. While the overall energy dependence can be described by the Wannier power law, we found oscillations in the cross section which are in good agreement with a modulated threshold law as proposed by Temkin [ Phys. Rev. Lett. 49 365 (1982)]. This behavior may be due to the unequal binding energies of the electrons involved in the double-photoionization process. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.093002
DOI:
10.1103/PhysRevLett.89.093002
PACS:
32.80.Fb
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