Phys. Rev. A 69, 042717 (2004) [7 pages]Triple photoionization of Ne and Ar near thresholdReceived 24 November 2003; published 23 April 2004 The triple-photoionization cross section of neon and argon near threshold has been investigated by ion time-of-flight spectrometry. We applied the Wannier power law to our data and confirmed the theoretical Wannier exponent in the cases of Ne and Ar. Our data also agree with previous findings regarding the Wannier exponent and its range of validity for Ne. However, the Wannier power law exhibits a much smaller range of validity of 2 eV for Ar compared to 5 eV for Ne. Also, in contrast to a previous experiment, we do not find a “second” power law but a gradual decrease of the exponent above the range of validity of the Wannier power law. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.69.042717
DOI:
10.1103/PhysRevA.69.042717
PACS:
32.80.Fb
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